JPH04145427A - Silver halide photographic sensitive material for x-ray and photographing method using same - Google Patents

Silver halide photographic sensitive material for x-ray and photographing method using same

Info

Publication number
JPH04145427A
JPH04145427A JP26975390A JP26975390A JPH04145427A JP H04145427 A JPH04145427 A JP H04145427A JP 26975390 A JP26975390 A JP 26975390A JP 26975390 A JP26975390 A JP 26975390A JP H04145427 A JPH04145427 A JP H04145427A
Authority
JP
Japan
Prior art keywords
emulsion
silver halide
sensitivity
halide photographic
silver
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP26975390A
Other languages
Japanese (ja)
Inventor
Masaaki Taguchi
田口 雅昭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP26975390A priority Critical patent/JPH04145427A/en
Publication of JPH04145427A publication Critical patent/JPH04145427A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To obtain a sensitive material having high sensitivity and superior sharpness by making the sensitivity of an emulsion layer on one side of a base higher than that of an emulsion layer on the other side and specifying the difference in photosensitive max. wavelength. CONSTITUTION:The sensitivity of an emulsion layer on one side (A side) of a base is made >=1.5 times as high as that of an emulsion layer on the other side (B side) and the difference in photosensitive max. wavelength is regulated to <50nm. The resulting sensitive material is exposed from only one side at the time of photographing.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は高感度で、かつ画像の鮮鋭性が優れたX線撮影
用ハロゲン化銀写真感光材料及びその撮影方法に関する
ものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a silver halide photographic material for X-ray photography that has high sensitivity and excellent image sharpness, and a method for photographing the same.

〔発明の背景〕[Background of the invention]

医療診断に利用されているX線撮影用フィルムは、撮影
時にフィルムを2枚の蛍光増感紙に挟んで利用している
のが一般的である。これは人体へのX線の影響を考慮し
、少量でよりX線を有効利用するため前面の増感紙を透
過したX線をさらに後面の増感紙で利用するものである
X-ray imaging films used for medical diagnosis are generally used by sandwiching the film between two fluorescent intensifying screens during imaging. This takes into account the influence of X-rays on the human body, and in order to use a small amount of X-rays more effectively, the X-rays that have passed through the front intensifying screen are further used in the rear intensifying screen.

近年、フィルムや増感紙の高感度化が進んでいるなかで
、医療診断用の画像は高画質化の要望が益々強く、とく
に微細な病巣の診断には高い鮮鋭性が要求されている。
In recent years, as films and intensifying screens have become more sensitive, there has been an increasing demand for higher quality images for medical diagnosis, and particularly high sharpness is required for diagnosis of minute lesions.

しかし、両面に乳剤が塗布されているX線用ハロゲン化
銀写真感光材料においては、一方の増感紙から発光され
た光が、隣接するハロゲン化銀乳剤層を通過し、その光
が支持体によって広がり、反対側のハロゲン化銀乳剤層
を像様露光する所謂クロスオーバー露光現象によって、
画像の鮮鋭性を劣化する大きな要因となっている。
However, in X-ray silver halide photographic materials in which emulsions are coated on both sides, the light emitted from one intensifying screen passes through the adjacent silver halide emulsion layer, and the light is transmitted to the support. By the so-called cross-over exposure phenomenon in which the silver halide emulsion layer on the opposite side is exposed imagewise,
This is a major factor in deteriorating the sharpness of images.

クロスオーバー露光を減少し、鮮鋭性を向上するため従
来より数多くの提案がなされており、例えばハロゲン化
銀乳剤層又は構成層中に染料を用いた特開昭61−13
2945号或は英国特許821,352号などがある。
Many proposals have been made in the past to reduce cross-over exposure and improve sharpness.
No. 2945 or British Patent No. 821,352.

さらにフィルムサイドと併行して増感紙サイドからも改
良がなされており例えば、感色性の異なるハロゲン化銀
乳剤層をA面とB面に設け、各々その感色性jこ合致し
た発光スペクトルを有する蛍光増感紙を用いた特開平2
−110538号など開示されている。
Furthermore, improvements have been made from the intensifying screen side in parallel with the film side. For example, silver halide emulsion layers with different color sensitivities are provided on the A side and B side, and the emission spectra that match the color sensitivities of each layer are created. Unexamined Japanese Patent Publication No. 2003-2010 using a fluorescent intensifying screen with
-110538 etc. are disclosed.

しかしながら、これら改良技術も両面乳剤で増感紙を2
枚使用するかぎり鮮鋭性の劣化は避けられず、特にX線
撮影システムにおいてX線をフィルム面に対して斜めに
入射する斜入撮影では、A。
However, these improved techniques also use double-sided emulsions to create two intensifying screens.
As long as the film is used, deterioration in sharpness is inevitable, especially in oblique photography in which X-rays are incident obliquely to the film surface in an X-ray imaging system.

B面の画像のズレが鮮鋭性を著しく劣化する結果となっ
ている。
The result is that the image shift on the B side significantly deteriorates the sharpness.

〔発明の目的〕[Purpose of the invention]

従って本発明の第1の目的は、高感度で、かつ鮮鋭性の
優れたX線用ハロゲン化銀写真感光材料を提供すること
である。
Therefore, a first object of the present invention is to provide a silver halide photographic material for X-rays which is highly sensitive and has excellent sharpness.

本発明の第2の目的は、斜入撮影においても画像のズレ
がない高画質を得られるX線用ハロゲン化銀写真感光材
料の撮影方法を提供することである。その他の目的は以
下の明細から明らかとなる。
A second object of the present invention is to provide a method for photographing a silver halide photographic material for X-rays, which can obtain high image quality without image shift even in oblique photography. Other objectives will become apparent from the description below.

〔発明の構成〕[Structure of the invention]

本発明者等は鋭意検討の結果、これらの目的が以下によ
り達成され、ることを見いだし本発明を成す1こ至った
As a result of intensive studies, the inventors of the present invention have found that these objects can be achieved by the following methods, and have come up with the present invention.

即ち、透明支持体の両面に、少なくとも1層の感光性ハ
ロゲン化銀乳剤層を有するハロゲン化銀写真感光材料に
おいて、一方の側(A面)の乳剤層の感度が、もう一方
の側(B面)の乳剤層の感度より1.5倍以上高感度で
、かつ感光極大波長の差が50nm未満であるX線用ハ
ロゲン化銀写真感光材料ならびに前記のX線用ハロゲン
化銀写真感光材料を、蛍光増感塵紙を片面からのみ用い
て撮影することにより達成される。
That is, in a silver halide photographic material having at least one light-sensitive silver halide emulsion layer on both sides of a transparent support, the sensitivity of the emulsion layer on one side (side A) is higher than that on the other side (side B). A silver halide photographic light-sensitive material for X-rays, which has a sensitivity 1.5 times or more higher than the sensitivity of the emulsion layer (surface), and a difference in maximum sensitivity wavelength of less than 50 nm, and the above-mentioned silver halide photographic light-sensitive material for X-rays. , is achieved by photographing using fluorescence-sensitized dust paper from only one side.

以下、本発明を詳述する。The present invention will be explained in detail below.

従来より、支持体両面に乳剤層を有したフィルムでは、
画像観察の場合、直接目に入る表面画像と支持体ベース
を通過して目に入る裏面の画像とを足したものを見てい
ることである。この画像を支持体に対して直角に見る場
合は問題は少ないが、角度をつけた場合には表裏の画像
に“ずれ”が生じ当然ながら鮮鋭性は低下する。
Traditionally, in films with emulsion layers on both sides of the support,
In the case of image observation, we are looking at the sum of the front image that is directly visible to the eye and the back image that has passed through the support base and is visible to the eye. When this image is viewed at right angles to the support, there is no problem, but when viewed at an angle, the images on the front and back sides become "shifted" and the sharpness naturally decreases.

又、X線撮影に際してX線入射角がフィルム面に対して
90°になるよう撮影するのが一般的だが、一部には斜
入で撮影する場合があって、このような場合には表裏の
画像の“ずれ”がさらに拡大され著しく鮮鋭性の低下を
もたらす。
In addition, when taking X-rays, it is common to take X-rays so that the angle of incidence is 90° with respect to the film surface, but in some cases, the X-rays are taken at an oblique angle, and in such cases, both front and back sides are taken. The "shift" in the image is further magnified, resulting in a significant decrease in sharpness.

このように両面の画像の合計を観察していたのが従来の
ンステムであったが、本発明者は種々検討の結果、濃度
領域により画像を表裏の一方に片寄せることにより低濃
度域から中濃度域の画像のシャープネスを著しく向上す
ることができることを見いだした。
Conventional systems observed the sum of images on both sides in this way, but after various studies, the inventors of the present invention determined that by shifting the image to one side depending on the density area, it would be possible to improve the system from low to medium density. It has been found that the sharpness of images in the density range can be significantly improved.

なお、片面のみに乳剤層を設けた場合には、鮮鋭性は劣
化しない反面、両面時と同等の性能を得る必要から同量
のハロゲン化銀乳剤を塗布するために現像処理性は大幅
に劣化し、感度低下、色残り、残留銀や残留ハイポによ
る保存画像の劣化など問題となる。
Note that when an emulsion layer is provided on only one side, sharpness does not deteriorate, but the development processability deteriorates significantly because the same amount of silver halide emulsion is coated because it is necessary to obtain the same performance as when using both sides. However, problems such as decreased sensitivity, residual color, and deterioration of stored images due to residual silver and residual hypo are caused.

本発明では、支持体の両面に乳剤層を塗布するが従来法
と異なり両面の感光性乳剤に感度差をつけることに特徴
を有している。しかも撮影に際しては片面からのみ露光
することである。
In the present invention, emulsion layers are coated on both sides of a support, and unlike conventional methods, the present invention is characterized in that a sensitivity difference is created between the photosensitive emulsions on both sides. Moreover, when photographing, exposure is done from only one side.

本発明に係る写真感光材料の支持体の一方の側の乳剤感
度は、もう一方の側のそれより1.5倍以上高感度であ
ることが本発明の目的効果を良好に奏する。
In the photographic light-sensitive material according to the present invention, the emulsion sensitivity on one side of the support should be 1.5 times or more higher than that on the other side to achieve the desired effects of the present invention.

又、本発明でいう感光極大波長とは、ハロゲン化銀乳剤
の固有吸収波長域における極大波長値もしくは、ハロゲ
ン化銀乳剤を増感色素で分光増感することにより得られ
る増感波長域での極大波長値を言う。
Furthermore, the maximum sensitizing wavelength in the present invention refers to the maximum wavelength value in the specific absorption wavelength range of a silver halide emulsion, or the maximum wavelength value in the sensitizing wavelength range obtained by spectrally sensitizing a silver halide emulsion with a sensitizing dye. It refers to the maximum wavelength value.

本発明に係る写真感光材料の感光極大波長は、支持体の
一方の側の乳剤に対して、もう一方の側の乳剤が50n
m未満相違することで、好ましくは20nmの差を有し
ていることである。
The maximum wavelength of sensitivity of the photographic light-sensitive material according to the present invention is 50nm for the emulsion on one side of the support and 50nm for the emulsion on the other side.
The difference is less than m, preferably 20 nm.

なお、蛍光増感紙のX線照射による発光ピークは、もっ
とも一般的なレギュラータイプが450nmに、オルソ
タイプが540nmにある。
Incidentally, the emission peak of the fluorescent intensifying screen due to X-ray irradiation is at 450 nm for the most common regular type, and at 540 nm for the ortho type.

本発明に係るハロゲン化銀写真感光材料の好ましい実施
態様としては、例えば(A面)の乳剤はレギュラータイ
プのとき450nmに、オルソタイプのときには540
nmに感光極大を有し、もう一方の側の(B面)より1
.5倍以上、好ましくは2.0倍以上高い感度を有して
いることである。
In a preferred embodiment of the silver halide photographic light-sensitive material according to the present invention, for example, the (A side) emulsion has a wavelength of 450 nm when it is a regular type, and a wavelength of 540 nm when it is an ortho type.
1 nm from the other side (B side)
.. The sensitivity is 5 times or more, preferably 2.0 times or more higher.

又、(B面)の乳剤は、(A面)がレギュラータイプの
ときには400−430nmもしくは470−500n
mに、又(A面)がオルソタイプのときには490〜5
00nmもしくは560〜590nmにそれぞれ(A面
)の感光極大波長より短波長内至長波長に“ずれ“てい
ることが好ましい。
Also, the (B side) emulsion is 400-430nm or 470-500nm when (A side) is a regular type.
m, and when (A side) is orthotype, 490-5
It is preferable that the wavelength is "shifted" from the maximum photosensitive wavelength of 00 nm or 560 to 590 nm to the longest wavelength within the short wavelength range.

本発明に係るハロゲン化銀乳剤の感光極大を調整するに
は、従来公知のシアニン、メロシアニン、ローダニン或
はスチリールタイプなどの分光増感色素を用いることに
より可能となる。
The sensitivity maximum of the silver halide emulsion according to the present invention can be adjusted by using conventionally known spectral sensitizing dyes such as cyanine, merocyanine, rhodanine or styryl type.

本発明において好ましく用いられる増感色素としては、
例えば下記一般式CI)CI+)及び〔■〕で表される
ものが挙げられる。
Sensitizing dyes preferably used in the present invention include:
Examples include those represented by the following general formulas CI) CI+) and [■].

一般式CI) 1.・−21− に2 式中、ZIはピリジン、キノリン、ベンゾチアゾール、
ナフトチアゾール、ベンゾオキサゾール、ナフトオキサ
ゾール、ベンゾセレナゾール、ベンゾイミダゾールなど
を表し、これらの複素環は、アルキル基、アルコキシ基
、フェニル基、ハロゲン原子例えばクロール基などを置
換していてもよい。Qlは硫黄原子、酸素原子または−
N−を表し、R,、R2及びR1はアルキル基、置換ア
ルキル基を表す。nはO又は1を表す。
General formula CI) 1. -21- 2 In the formula, ZI is pyridine, quinoline, benzothiazole,
It represents naphthothiazole, benzoxazole, naphthoxazole, benzoselenazole, benzimidazole, etc., and these heterocycles may be substituted with an alkyl group, an alkoxy group, a phenyl group, or a halogen atom, such as a chloro group. Ql is a sulfur atom, an oxygen atom or -
It represents N-, and R,, R2 and R1 represent an alkyl group or a substituted alkyl group. n represents O or 1.

一般式〔■〕 式中RいR3はアルキル基又は置換アルキル基を表し、
R,はアルキル基を表す。
General formula [■] In the formula, R3 represents an alkyl group or a substituted alkyl group,
R represents an alkyl group.

Yl、Y2は水素原子、アルキル基又はハロゲン原子例
えばクロール基を表す。XCIはアニオンでmはO又は
lを表す。
Yl and Y2 represent a hydrogen atom, an alkyl group or a halogen atom, such as a chloro group. XCI is an anion, and m represents O or l.

一般式CI[1) R9 式中R,、R,及びR9はアルキル基、置換アルキル基
を表し、Y3、Y、は水素原子、ノ10ゲン厚子(例え
ばクロール基)フルオ四基、アルキルIG 基、アルコキンカルボニル基、Zは−N−基または酸素
原子を表し、RloはR9と同義である。
General formula CI [1) R9 In the formula, R, R, and R9 represent an alkyl group or a substituted alkyl group, and Y3 and Y are a hydrogen atom, a hydrogen atom (for example, a chloro group), a fluorotetra group, or an alkyl IG group. , an alkoxycarbonyl group, Z represents an -N- group or an oxygen atom, and Rlo has the same meaning as R9.

xeはアニオンでQは0又はlを表す。xe represents an anion and Q represents 0 or l.

これらの増感色素は、単一もしくは組合わせて本発明に
係るハロゲン化銀乳剤に用いることができる。
These sensitizing dyes can be used singly or in combination in the silver halide emulsion of the present invention.

本発明のハロゲン化銀写真感光材料に用いられる乳剤は
、沃臭化銀、沃塩化銀、沃塩臭化銀などいずれのハロゲ
ン化銀であってもよいが特に高感度のものが得られると
いう点では、沃臭化銀であることが好ましい。
The emulsion used in the silver halide photographic light-sensitive material of the present invention may be any silver halide such as silver iodobromide, silver iodochloride, silver iodochlorobromide, etc., but it is said that particularly high sensitivity can be obtained. From this point of view, silver iodobromide is preferred.

写真乳剤中のハロゲン化銀粒子は、立方体、8面体、1
4面体のような全て等方的に成長したもの、或は球形の
よう多面的な結晶型のもの、面欠陥を有しt;双晶から
成るもの或はそれらの混合型又は複合型であってもよい
。これらハロゲン化銀粒子の粒径は、0.1μm以下の
微粒子から20μmに至る大粒子であってもよい。
Silver halide grains in photographic emulsions are cubic, octahedral, 1
Crystals that are entirely isotropically grown such as tetrahedrons, polyhedral crystals such as spheres, those that have planar defects, those that are composed of twins, or mixed or composite types thereof. You can. The grain size of these silver halide grains may range from fine grains of 0.1 μm or less to large grains of up to 20 μm.

本発明のハロゲン化銀写真感光材料に用いられる乳剤は
、公知の方法で製造できる。例えば、リサーチ・ディス
クロージャー(RD)No、 17643(1978年
12月)−22−23頁の1・乳剤製造法(Emuls
ionPreparation and types)
及び同(RD)No、 18716(1979年11月
)・648頁に記載の方法で調製することができる。
The emulsion used in the silver halide photographic material of the present invention can be produced by a known method. For example, Research Disclosure (RD) No. 17643 (December 1978), pages 22-23, 1. Emulsion manufacturing method
ion preparation and types)
and (RD) No. 18716 (November 1979), page 648.

本発明の好ましい実施態様としては、沃化銀を粒子内部
に局在させた単分散乳剤が挙げられる。
A preferred embodiment of the present invention is a monodispersed emulsion in which silver iodide is localized inside the grains.

ここでいう単分散乳剤とは、常法により、例えば平均粒
子直径を測定したとき、粒子数又は重量で少なくとも9
5%の粒子が、平均粒子径の±40%以内、好ましくは
±30%以内にあるハロゲン化銀粒子である。ハロゲン
化銀の粒径分布は、狭い分布を有した単分散乳剤或は広
い分布の多分散乳剤のいずれであってもよい。
The term "monodispersed emulsion" as used herein means at least 9 particles in number or weight when the average particle diameter is measured by a conventional method, for example.
5% of the grains are silver halide grains within ±40%, preferably within ±30% of the average grain size. The grain size distribution of silver halide may be either a monodisperse emulsion with a narrow distribution or a polydisperse emulsion with a wide distribution.

ハロゲン化銀の結晶構造は、内部と外部が異な−たハロ
ゲン化銀組成からなっていてもよい。
The crystal structure of silver halide may have different silver halide compositions inside and outside.

本発明の好ましい態様としての乳剤は、高沃度のコア部
分に低沃度のンエル層からなる明確な二層構造を有した
コア/シェル型単分散乳剤である。
The emulsion according to a preferred embodiment of the present invention is a core/shell type monodispersed emulsion having a clear two-layer structure consisting of a high iodine core portion and a low iodine layer.

本発明の高沃度部の沃化銀含量は20〜40モル%で特
に好ましくは20〜30モル%である。
The silver iodide content of the high iodide portion of the present invention is 20 to 40 mol%, particularly preferably 20 to 30 mol%.

かかる単分散乳剤の製法は公知であり、例えばJ、Ph
ot、Sic、 12.242〜251頁(1963)
、特開昭48−36890号、同52−16364号、
同55−142329、同58−49938号、英国特
許1,413.748号、米国特Yf3,574,62
8号、同3 、655 、394号などの公報に記載さ
れている。
Methods for producing such monodispersed emulsions are known, for example, J. Ph.
ot, Sic, pp. 12.242-251 (1963)
, JP-A-48-36890, JP-A-52-16364,
No. 55-142329, No. 58-49938, British Patent No. 1,413.748, U.S. Patent No. 3,574,62
It is described in publications such as No. 8, No. 3, No. 655, and No. 394.

上記の単分散乳剤としては、種晶を用い、この種晶を成
長核として銀イオン及びハライドイオンを供給すること
により、粒子を成長させた乳剤が特に好ましい。なお、
コアZシェル乳剤を得る方法としては、例えば英国特許
1,027,146号、米国特許3,505,068号
、同4,444,877号、特開昭60−14331号
などの公報に詳しく述べられている。
As the above-mentioned monodisperse emulsion, an emulsion in which grains are grown by using seed crystals and supplying silver ions and halide ions using the seed crystals as growth nuclei is particularly preferred. In addition,
Methods for obtaining core Z-shell emulsions are described in detail in publications such as British Patent No. 1,027,146, U.S. Patent No. 3,505,068, U.S. Patent No. 4,444,877, and Japanese Patent Application Laid-open No. 14331/1983. It is being

本発明に用いられるハロゲン化銀乳剤は、アスペクト比
が5以上の平板状粒子であってもよい。
The silver halide emulsion used in the present invention may be tabular grains having an aspect ratio of 5 or more.

かかる平板状粒子の利点は、分光増感効率の向上、画像
の粒状性及び鮮鋭性の改良などが得られるとして例えば
、英国特許2,112,157号、米国特許4,439
,520号、同4,433,048号、同4,414,
310号、同4,434.226号なとの公報に記載さ
れている。
The advantages of such tabular grains include improved spectral sensitization efficiency and improved image graininess and sharpness, as described in British Patent No. 2,112,157 and US Pat. No. 4,439, for example.
, No. 520, No. 4,433,048, No. 4,414,
No. 310 and No. 4,434.226.

上述した乳剤は、粒子表面に潜像を形成する表面潜像型
或は粒子内部に潜像を形成する内部潜像型、表面と内部
に潜像を形成する型のいずれの乳剤で有ってもよい。こ
れらの乳剤は、物理熟成或は粒子調製の段階でカドミウ
ム塩、鉛塩、亜鉛塩、タリウム塩、イリジウム塩又はそ
の錯塩、ロジウム塩又はその錯塩、鉄塩又はその錯塩な
どを用いてもよい。乳剤は可溶性塩類を除去するために
ターデル水洗法、70キユレーンヨン沈降法なトノ水洗
方法がなされてよい。好ましい水洗法としては、例えば
特公昭35−16086号記載のスルホ基を含む芳香族
炭化水素系アルデヒド樹脂を用いる方法、又は特開昭6
3−158644号記載の凝集高分子剤例示G3.08
などを用いる方法が特に好ましい脱塩法として挙げられ
る。
The above-mentioned emulsion may be a surface latent image type that forms a latent image on the grain surface, an internal latent image type that forms a latent image inside the grain, or a type that forms a latent image on the surface and inside the grain. Good too. These emulsions may use cadmium salts, lead salts, zinc salts, thallium salts, iridium salts or complex salts thereof, rhodium salts or complex salts thereof, iron salts or complex salts thereof, etc. at the stage of physical ripening or grain preparation. In order to remove soluble salts, the emulsion may be subjected to a water-washing method such as a Tardel water-washing method or a 70-year-old sedimentation method. Preferred water washing methods include, for example, the method using an aromatic hydrocarbon aldehyde resin containing a sulfo group as described in Japanese Patent Publication No. 35-16086, or the method described in Japanese Patent Publication No. 16086
Example G3.08 of the agglomerated polymer agent described in No. 3-158644
Particularly preferred desalting methods include methods using the following methods.

本発明に係る乳剤は、物理熟成又は化学熟成前後の工程
において、各種の写真用添加剤を用いることができる。
Various photographic additives can be used in the emulsion according to the present invention in the steps before and after physical ripening or chemical ripening.

公知の添加剤としては、例えばリサーチ・ディスクロー
ジャー No−17643(1978年12月)及び同
No−18716(1979年11月)に記載された化
合物が挙げられる。これら二つのリサーチ・ディスクロ
ージャーに示されている化合物種類と添    加  
  剤  RD−17643頁  分類 化学増感剤 23   I[1 増  感  色  素   23      TV現像
促進剤 2Q   XXI カブリ防止剤 24   V? 安    定   剤   //      //色汚
染防止剤 25   ■ 画像安定剤 25   ■ 紫外線吸収剤 25〜26 ■ フィルター染料 1lll 増    白    剤   24      V硬 
   化    剤   26      X塗  布
  助  剤   26〜27   II界面活性剤 
26〜27 II 可    塑    剤   27     11[ス
   ベ   リ   剤    //スタチック防止
剤27    ]][ マント剤281VI バ  イ  ン  ダ  −    26      
  [RD−18716 頁  分類 648−右上 648右−649左 648−右上 649−右下 650左 右 649右−650左 651左 650右 650右 〃 650右 651左 本発明に係る感光材料に用いることのできる支持体とし
ては、例えば前述のRD−17643の28頁及びRD
−18716の647頁左欄に記載されているものが挙
げられる。
Examples of known additives include compounds described in Research Disclosure No. 17643 (December 1978) and Research Disclosure No. 18716 (November 1979). Compound types and additions shown in these two research disclosures
Agent RD-17643 page Classification Chemical sensitizer 23 I[1 Sensitizing dye 23 TV development accelerator 2Q XXI Antifoggant 24 V? Stabilizer // // Color stain prevention agent 25 ■ Image stabilizer 25 ■ Ultraviolet absorber 25-26 ■ Filter dye 1llll Brightening agent 24 V hardener
Coating agent 26 X coating aid 26-27 II surfactant
26-27 II Plasticizer 27 11 [Slip agent // Static inhibitor 27]] [Mant agent 281VI Binder - 26
[RD-18716 page Classification 648 - Upper right 648 Right - 649 Left 648 - Upper right 649 - Lower right 650 Left and right 649 Right - 650 Left 651 Left 650 Right 650 Right〃 650 Right 651 Left Can be used in the photosensitive material according to the present invention As a support, for example, the above-mentioned page 28 of RD-17643 and RD
-18716, page 647, left column.

適当な支持体としては、プラスチックフィルムなどでこ
れら支持体の表面は一般に、塗布層の接着をよくするた
めに、下塗層を設けたり、コロナ放電、紫外線照射など
を施してもよい。そして、このように処理された支持体
上の片面或は両面に本発明に係る乳剤を塗布することが
できる。
Suitable supports include plastic films, and the surfaces of these supports may generally be provided with an undercoat layer or subjected to corona discharge, ultraviolet irradiation, etc. in order to improve adhesion of the coating layer. Then, the emulsion according to the present invention can be coated on one or both sides of the support thus treated.

〔実施例〕〔Example〕

以下に具体的実施例を示して本発明を更に詳しく説明す
る。
The present invention will be explained in more detail by showing specific examples below.

実施例1 (A)単分散乳剤の調製 反応釜の条件として60°C,I)Ag= 8、そして
pHを2に保ちつつ、ダブルジェット法により平均粒径
0,3μmの沃化銀2モル%を含むヨウ臭化銀の単分散
立方晶乳剤を得た。電子顕微鏡観察によれば双晶の発生
率は個数で1%以下であった。
Example 1 (A) Preparation of monodispersed emulsion 2 moles of silver iodide with an average grain size of 0.3 μm was added using the double jet method while maintaining the reaction vessel conditions at 60°C, I) Ag = 8, and pH at 2. % of silver iodobromide was obtained. According to electron microscopic observation, the incidence of twins was less than 1% in number.

この乳剤を種晶として、更に以下のように成長させた。Using this emulsion as a seed crystal, it was further grown as follows.

反応釜内にゼラチン水溶液を40℃に保ち上記種晶を溶
解し、更にアンモニア水と酢酸を加えてpHを9.5に
調整した。
The seed crystals were dissolved in an aqueous gelatin solution kept at 40° C. in a reaction vessel, and the pH was adjusted to 9.5 by adding aqueous ammonia and acetic acid.

アンモニア性銀イオン液にてpAgを7.3に調整後、
pH及びI)Agを一定に保ちつつ、アンモニア性銀イ
オンと、沃化カリウムと臭化カリウムを含む溶液をタプ
ルジェット法で添加し、沃化銀30モル%を含む沃臭化
銀層を形成せしめた。
After adjusting pAg to 7.3 with ammoniacal silver ion solution,
While keeping the pH and I) Ag constant, a solution containing ammoniacal silver ions, potassium iodide and potassium bromide is added using the tuple jet method to form a silver iodobromide layer containing 30 mol% of silver iodide. I forced it.

酢酸と臭化銀を用いてpH=9、pAg=9.0に調整
した後にアンモニア性銀イオン液と臭化カリウムを同時
に添加し、成長径粒径の90%にあたるまで成長させた
。この時pHは9.0から8.20まで徐々に下げた。
After adjusting the pH to 9 and pAg to 9.0 using acetic acid and silver bromide, an ammoniacal silver ion solution and potassium bromide were added at the same time, and the particles were grown until they reached 90% of the grown particle size. At this time, the pH was gradually lowered from 9.0 to 8.20.

臭化カリウム液を加えpAgを11とした後に、更にア
ンモニア性銀イオン液と臭化カリウムを加えてpHを徐
々に8まで下げながら成長せしめ、平均粒径0.7μm
1沃化銀2モル%を含む単分散性の沃臭化銀乳剤を得た
After adding a potassium bromide solution to bring the pAg to 11, an ammoniacal silver ion solution and potassium bromide were added to gradually lower the pH to 8 while growing, with an average particle size of 0.7 μm.
A monodisperse silver iodobromide emulsion containing 2 mol % of silver iodide was obtained.

乳剤の調製の際に、下記増感色素(a)を乳剤中の銀1
モル当たり300mgと、増感色素(b)を15mg添
加した。
When preparing the emulsion, add the following sensitizing dye (a) to silver 1 in the emulsion.
300 mg per mole and 15 mg of sensitizing dye (b) were added.

増感色素(a) 増感色素(b) 得られた乳剤を40°Cに保ち、その中へナフタレンス
ルホン酸ナトリウムのホルマリン樹脂(平均重合度4〜
6)の適量を加えて、ハロゲン化銀粒子を沈降せしめ、
上澄液を排出後、40°Cの純水を加えたのち、硫酸マ
グネシウムを添加し、再度/%ロゲン化銀粒子を沈降さ
せ、上澄液を排除した。
Sensitizing dye (a) Sensitizing dye (b) The obtained emulsion was kept at 40°C, and formalin resin of sodium naphthalene sulfonate (average degree of polymerization 4 to
Add an appropriate amount of 6) to precipitate the silver halide grains,
After discharging the supernatant, pure water at 40°C was added, and then magnesium sulfate was added to precipitate the silver halide grains again, and the supernatant was discarded.

これを再度操り返してからゼラチンを添加し、pH−6
,0,pAg=8.5の乳剤を得た。
After repeating this process, gelatin was added and the pH was adjusted to -6.
, 0, an emulsion with pAg=8.5 was obtained.

得られた乳剤をチオシアン酸アンモニウムと塩化金酸及
びハイポを加え、最高感度が得られる条件での化学熟成
を行った。
Ammonium thiocyanate, chloroauric acid, and hypo were added to the resulting emulsion, and chemical ripening was performed under conditions that yielded the highest sensitivity.

次いで安定剤として4−ヒドロキシ−6−メチル=1゜
3.3a、7−チトラザインデンの適量を加えて乳剤を
得t:。この乳剤を(AG−1)とした。
Then, an appropriate amount of 4-hydroxy-6-methyl=1.3.3a,7-chitrazaindene was added as a stabilizer to obtain an emulsion. This emulsion was designated as (AG-1).

また乳剤調製時に増感色素(a)及び(b)を添加せず
、それ以外は上記乳剤(AC−1)と全く同様に調製し
た乳剤を(AB−1)とする。さらに(AG−1)(A
B−1)と同様に粒径のみ1.2μm、 0.4μmの
乳剤を調製し、それぞれの乳剤を(AG−2)、(AB
−2)及び(AC−3)(AB−3)とした。
Further, an emulsion (AB-1) was prepared in exactly the same manner as the above emulsion (AC-1), except that the sensitizing dyes (a) and (b) were not added during emulsion preparation. Furthermore, (AG-1) (A
Emulsions with grain sizes of 1.2 μm and 0.4 μm were prepared in the same manner as B-1), and the emulsions (AG-2) and (AB
-2) and (AC-3) (AB-3).

(AG−3)において、増感色素(b)のかわりに下記
の(c)を用いて調製した乳剤を(AG−4)、また(
b)のかわりに下記の(d)を用いて調製しt;乳剤を
(AG−5)とした。
In (AG-3), an emulsion prepared using the following (c) instead of the sensitizing dye (b) was used in (AG-4), and (
Emulsion (AG-5) was prepared by using the following (d) in place of b).

増感色素(c) 増感色素(d) CB)平板状乳剤の調製 水lQ中にKBrlO,5g、チオエーテル化合物であ
るHO(CHz)ts(CHz:hS(CHz)tOH
(’) 0.5wt%水溶液1OCC及びゼラチン30
gを加えて溶解し、70°Cに保つl;。この溶液中に
、撹拌しながら、硝酸銀水溶液の0.88モル/Qを3
0m12と、沃化カリウムと臭化カリウム(モル比3.
5 : 96.5)の水溶液0.88モル/Qを30m
(2とをダブルジエント法により添加し、平均粒径0.
60μmで沃化銀含有率が3.5モル%の粒子を得た。
Sensitizing dye (c) Sensitizing dye (d) CB) Preparation of tabular emulsion In 1Q of water, 5 g of KBrlO, a thioether compound HO(CHz)ts(CHz:hS(CHz)tOH)
(') 0.5wt% aqueous solution 1OCC and gelatin 30
Add g to dissolve and keep at 70°C. 0.88 mol/Q of silver nitrate aqueous solution was added into this solution while stirring.
0m12, potassium iodide and potassium bromide (molar ratio 3.
5: 96.5) aqueous solution of 0.88 mol/Q in 30 m
(2) was added by the double dient method, and the average particle size was 0.
Grains with a diameter of 60 μm and a silver iodide content of 3.5 mol % were obtained.

該混合溶液の添加終了後40°Cまで降温した。After the addition of the mixed solution was completed, the temperature was lowered to 40°C.

ついで前記の(A)乳剤と同様の方法で脱塩を行った。Desalting was then carried out in the same manner as for emulsion (A) above.

その後、ゼラチン15g/AgXモルを添加して、平板
粒子含有の乳剤(B)を調製した。
Thereafter, 15 g/AgX mol of gelatin was added to prepare an emulsion (B) containing tabular grains.

(C)多分散乳剤の調製 順混合法により、下記の4種の溶液により調製し tこ
 。
(C) Preparation of polydispersed emulsion The following four types of solutions were prepared using the mixing method.

溶液Bと溶液Cを乳剤調製用の反応釜に注入し、回転数
300回転/分のプロペラ型撹拌器で撹拌し、反応温度
を55℃に保った。
Solution B and solution C were poured into a reaction vessel for emulsion preparation and stirred with a propeller type stirrer at a rotation speed of 300 revolutions/minute, and the reaction temperature was maintained at 55°C.

次に、A液を1=2(容量比)の割合に分割し、その内
のlOOmQを1分間かけて投入した。10分間撹拌を
続けた後、A液の残余の20Qm(2を10分間かけて
投入した。更に30分間撹拌を継続した。そしてD液を
加えて、反応釜に中の溶液のpHを6.0に調製し、反
応を停止させた。
Next, the solution A was divided into 1=2 (volume ratio), and 100mQ of the divided solution was added over 1 minute. After continuing stirring for 10 minutes, the remaining 20Qm (2) of solution A was added over 10 minutes. Stirring was continued for an additional 30 minutes. Then, solution D was added and the pH of the solution in the reaction vessel was adjusted to 6. The reaction was stopped.

この乳剤を前記の(A)乳剤と同様の方法で脱塩し得ら
れたハロゲン化銀粒子の平均粒径は0.56μmであり
、分散度は0.32であった。また沃化銀含有率は1.
2モル%であった。
This emulsion was desalted in the same manner as the emulsion (A), and the average grain size of the silver halide grains obtained was 0.56 μm, and the degree of dispersion was 0.32. Also, the silver iodide content is 1.
It was 2 mol%.

上記(B)(C)で得られた乳剤について、化学増感を
行った。つまり、チオシアン酸アンモニウムと塩化金酸
とハイポを加え、金−硫黄増感を施した。
The emulsions obtained in (B) and (C) above were subjected to chemical sensitization. That is, ammonium thiocyanate, chloroauric acid, and hypo were added to perform gold-sulfur sensitization.

この化学増感終了後、4−ヒドロキシ−6−メチル−1
,3,3a、7−チトラザインデンを加えた。その後、
沃化カリウム150mg/AgXモルと、前記増感色素
(a)、(b)を乳剤(AG−1)のときと同量添加し
て、分光増感を行った。得られた乳剤を、それぞれ乳剤
(BG−1)、(CG−1)とする。
After this chemical sensitization, 4-hydroxy-6-methyl-1
,3,3a,7-chitrazaindene was added. after that,
Spectral sensitization was carried out by adding 150 mg/AgX mol of potassium iodide and the same amounts of the sensitizing dyes (a) and (b) as in emulsion (AG-1). The obtained emulsions are referred to as emulsions (BG-1) and (CG-1), respectively.

また、AB−1と同様に分光増感を行わなかった乳剤を
それぞれ(BB−1)、(CB−1)とする。
Further, similar to AB-1, emulsions that were not subjected to spectral sensitization are referred to as (BB-1) and (CB-1), respectively.

また上記(A)、(B)及び(C)のそれぞれの乳剤液
(感光性)・ロゲン化銀塗布液)に用いた添加剤は次の
とおりである。添加量は/\ロゲン化化銀1ルル当りの
量で示す。
Further, the additives used in each of the emulsion liquids (photosensitive) and silver halogenide coating liquids of (A), (B) and (C) above are as follows. The amount added is expressed as /\per 1 l of silver halide.

L−ブチル−カテコール ポリビニルピロリドン(分子量10,000)スチレン
−無水マレイン酸共重合体 00mg 1.0g 2.5g ニトロフェニル・トリフェニル ホスホニウムクロリド 0mg ■、3−ジヒドロキシベンゼンー4− スルホン酸アンモニウム 2−メルカプトベンツイミダゾール− g スルホン酸ナト リウム 1.5mg H また保護層液に用いた添加物は次のとおりである。添加
量はゼラチン1g当たりの量で示す。
L-Butyl-catechol polyvinylpyrrolidone (molecular weight 10,000) Styrene-maleic anhydride copolymer 00mg 1.0g 2.5g Nitrophenyl triphenylphosphonium chloride 0mg ■, 3-dihydroxybenzene-4-ammonium sulfonate 2- Mercaptobenzimidazole-g Sodium sulfonate 1.5 mg H The additives used in the protective layer solution are as follows. The amount added is shown per 1 g of gelatin.

二酸化ケイ素粒子 面積平均粒径7μmのポリメチルメタ クリレートからなるマット剤      7mgコロイ
ドシリカ(平均粒径0.013μm)    70mg
2.4−ジクロロ−6−ヒドロキシ 1.3.5−トリアジンナトリウム塩   30mg〔
CH2= CH30□−CHrj= 036mg C)ICOO(CH2)2cH(CHx)zmg So 、 Na Fl*C20−+cH,cHzo升武H2cH2−OH
3mg以上の塗布液を、厚さ180μmの下引き処理済
のブルーに着色したポリエチレンテレフタレートフィル
ムベース上に、両面に塗布、乾燥して表1に示すように
試料No、1〜8を作成した。
Matting agent made of polymethyl methacrylate with silicon dioxide particles having an area average particle size of 7 μm 7 mg Colloidal silica (average particle size of 0.013 μm) 70 mg
2.4-dichloro-6-hydroxy 1.3.5-triazine sodium salt 30 mg [
CH2= CH30□-CHrj= 036mg C) ICOO(CH2)2cH(CHx)zmg So, Na Fl*C20-+cH, cHzo Masutake H2cH2-OH
3 mg or more of the coating liquid was coated on both sides of a 180 μm thick undercoated blue colored polyethylene terephthalate film base and dried to prepare samples Nos. 1 to 8 as shown in Table 1.

得られl:試料の各面の相対感度は、各々表1に示した
蛍光増感紙をバック面用のみを用い、シングルバック法
で高感度層側(A面)から投影した試料と低感度側(B
面)から撮影した試料を、それぞれ作製した。各試料は
、露光面と反対の側を蛋白質分解酵素液で除去し、露光
面のみを残しその面の感度を測定した。露光条件は管電
圧90KVP、20mAで、0.05秒間X線を照射し
て、距離法にてセンシトメトリー特性曲線を作成し、相
対感度及び最高濃度を求めた。処理は、コニカ自動現像
機5RX−501を用い45秒処理モードで処理しl;
。現像液は前記現像液−1、用いた自動現像機の定着温
度は33°C1水洗水は、温度18℃で毎分1.512
供給するものとした。
Obtained l: The relative sensitivity of each side of the sample is shown in Table 1 using the fluorescent intensifying screen only for the back side, and the sample projected from the high-sensitivity layer side (side A) using the single-back method and the low-sensitivity sample. Side (B
Samples photographed from the surface) were prepared. For each sample, the side opposite to the exposed side was removed with a protease solution, leaving only the exposed side and the sensitivity of that side was measured. The exposure conditions were a tube voltage of 90 KVP and 20 mA, and X-rays were irradiated for 0.05 seconds. A sensitometric characteristic curve was created using the distance method, and relative sensitivity and maximum density were determined. Processing was performed using a Konica automatic processor 5RX-501 in a 45 second processing mode.
. The developing solution was the above-mentioned Developer Solution-1, the fixing temperature of the automatic developing machine used was 33°C, and the washing water was at a temperature of 18°C at a speed of 1.512 m/min.
We decided to supply it.

相対感度は最高濃度から支持体の濃度0.15を差し引
いた値に0.4を掛け、更に支持体濃度0.15を足し
た値の濃度を得るために必要なX線量の逆数として求め
た。なお、試料N011及びNo、3のシステム感度は
、両面露光した場合の値を示した。
Relative sensitivity was calculated as the reciprocal of the X-ray dose required to obtain the density obtained by subtracting the support concentration 0.15 from the maximum density, multiplying it by 0.4, and then adding the support concentration 0.15. . Note that the system sensitivities of Samples No. 011 and No. 3 are values obtained when both sides are exposed.

MTFの評価 試料No、l及びNo、3については0.5〜10ライ
ン/mmの鉛製の矩形波の入ったMTFチャートを蛍光
スクリーンのフロント側の裏面に密着させ、フィルム面
の鉛のチャートで遮蔽されていない部分の濃度が、両面
で約1.0になるようにX線を照射した。試料No、2
及びNo、4〜8については、蛍光スクリーンのバック
側のみ用いてシングルバック法で行った以外はNo、l
と同様にMTF評価試料を作成し j二 。
For MTF evaluation samples No. 1, No. 3, an MTF chart containing a lead square wave of 0.5 to 10 lines/mm was placed in close contact with the back side of the front side of the fluorescent screen, and the lead chart on the film surface was X-rays were irradiated so that the density of the unshielded portion was approximately 1.0 on both sides. Sample No. 2
and Nos. 4 to 8, except that the single back method was used using only the back side of the fluorescent screen.
Create an MTF evaluation sample in the same manner as above.

上記のようにしてX線を照射した試料について前述と同
様の現像処理をした後、記録された矩形波のパターンを
サクラマイクロデンシトメーターM−5型(コニカ(株
)製)を用い、測定した。
After the sample irradiated with X-rays as described above was developed in the same manner as described above, the recorded square wave pattern was measured using a Sakura Microdensitometer M-5 model (manufactured by Konica Corporation). did.

尚、この時のアパーチャーサイズは矩形波の平行方向に
300μm、直角方向に25μmであり、拡大倍率は2
0倍であった。得られたMTF値を代表し、空間周波数
2.0ライン/mmの値で示す。
The aperture size at this time is 300 μm in the parallel direction of the rectangular wave and 25 μm in the perpendicular direction, and the magnification is 2.
It was 0 times. The obtained MTF values are representative and are shown as values at a spatial frequency of 2.0 lines/mm.

表中の鮮鋭性は、四肢骨ファントムをX線入射角度30
°で斜入撮影し、上記と同様の処理を行い、得られた画
像について目視による下記の5段階で評価した。
The sharpness in the table is for the limb bone phantom at an X-ray incident angle of 30
Oblique photographing was carried out at an angle of 30°C, the same processing as above was carried out, and the obtained images were visually evaluated on the following five scales.

1、非常に劣る 2、劣る 普通 良好 非常に良好 表1から明らかなように、本発明に係る試料はX線撮影
において感度を減少することなく、鮮鋭性の良い画像を
得られることが分かる。
1. Very poor 2. Poor Average Good Very good As is clear from Table 1, it is possible to obtain images with good sharpness in the sample according to the present invention without reducing the sensitivity in X-ray photography.

〔発明の効果〕〔Effect of the invention〕

本発明により、蛍光増感紙を片面のみ用いても高感度で
、かつ鮮鋭性の優れた画像を有するX線用ハロゲン化銀
写真感光材料が得られた。
According to the present invention, a silver halide photographic material for X-rays which has high sensitivity and an image with excellent sharpness even when a fluorescent intensifying screen is used on only one side has been obtained.

本発明の効果は、X線の斜入撮影において高画質を得ら
れる点で特に有効であった。
The effects of the present invention are particularly effective in that high image quality can be obtained in oblique X-ray photography.

Claims (2)

【特許請求の範囲】[Claims] (1)透明支持体の両面に、少なくとも1層の感光性ハ
ロゲン化銀乳剤層を有するハロゲン化銀写真感光材料に
おいて、一方の側(A面)の乳剤層の感度が、もう一方
の側(B面)の乳剤層の感度より1.5倍以上高感度で
、かつ感光極大波長の差が50nm未満であることを特
徴とするX線用ハロゲン化銀写真感光材料。
(1) In a silver halide photographic material having at least one light-sensitive silver halide emulsion layer on both sides of a transparent support, the sensitivity of the emulsion layer on one side (side A) is higher than that on the other side (side A). A silver halide photographic material for X-rays, characterized in that it has a sensitivity 1.5 times or more higher than the sensitivity of the emulsion layer of side B), and a difference in maximum sensitivity wavelength of less than 50 nm.
(2)前記請求項(1)記載のX線用ハロゲン化銀写真
感光材料を、蛍光増感度紙を片面からのみ用いて撮影す
ることを特徴とするX線用ハロゲン化銀写真感光材料の
撮影方法。
(2) Photographing the silver halide photographic material for X-rays, characterized in that the silver halide photographic material for X-rays according to claim (1) is photographed using fluorescent intensifying paper from only one side. Method.
JP26975390A 1990-10-08 1990-10-08 Silver halide photographic sensitive material for x-ray and photographing method using same Pending JPH04145427A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26975390A JPH04145427A (en) 1990-10-08 1990-10-08 Silver halide photographic sensitive material for x-ray and photographing method using same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26975390A JPH04145427A (en) 1990-10-08 1990-10-08 Silver halide photographic sensitive material for x-ray and photographing method using same

Publications (1)

Publication Number Publication Date
JPH04145427A true JPH04145427A (en) 1992-05-19

Family

ID=17476678

Family Applications (1)

Application Number Title Priority Date Filing Date
JP26975390A Pending JPH04145427A (en) 1990-10-08 1990-10-08 Silver halide photographic sensitive material for x-ray and photographing method using same

Country Status (1)

Country Link
JP (1) JPH04145427A (en)

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