JP2006288739A5 - - Google Patents
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- JP2006288739A5 JP2006288739A5 JP2005113678A JP2005113678A JP2006288739A5 JP 2006288739 A5 JP2006288739 A5 JP 2006288739A5 JP 2005113678 A JP2005113678 A JP 2005113678A JP 2005113678 A JP2005113678 A JP 2005113678A JP 2006288739 A5 JP2006288739 A5 JP 2006288739A5
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- 238000003384 imaging method Methods 0.000 claims 11
- 238000005259 measurement Methods 0.000 claims 8
- 230000005540 biological transmission Effects 0.000 claims 1
Claims (5)
被検体をはさんで前記X線源に対向して配置され、X線を検出してX線投影データを出力するX線検出器と、
前記X線源及び前記X線検出器を搭載して回転可能な回転手段と、
前記X線透過データに基づいて被検体の断層像を生成する画像処理手段と、
前記断層像を表示する表示手段と、
を備えたX線CT装置であって、
任意の計測撮影条件において標準的な人体モデルを計測撮影したときに得られるX線投影データを示す標準X線投影データを格納する格納手段と、
前記被検体の身体的特徴量の入力を受付ける特徴量入力受付手段と、
前記格納手段に格納された標準X線投影データを前記特徴量入力受付手段が取得した前記被検体の身体的特徴量に基づいて修正することにより、前記被検体を前記任意の撮影条件において計測撮影したときに得られると想定されるX線投影データを示す被検体想定投影データを生成する生成手段と、
前記被検体を計測撮影して得られた実際のX線投影データと前記被検体想定投影データとの比較結果に基づいて前記計測撮影の終了位置に到達したか否かを判定する判定手段と、
を備えることを特徴とするX線CT装置。 An X-ray source that emits X-rays;
An X-ray detector disposed opposite to the X-ray source across the subject, detecting X-rays and outputting X-ray projection data;
Rotating means capable of rotating by mounting the X-ray source and the X-ray detector;
Image processing means for generating a tomographic image of the subject based on the X-ray transmission data;
Display means for displaying the tomographic image;
An X-ray CT apparatus comprising:
Storage means for storing standard X-ray projection data indicating X-ray projection data obtained when a standard human body model is measured and photographed under arbitrary measurement and photographing conditions;
Feature quantity input receiving means for receiving an input of a physical feature quantity of the subject;
By modified based on physical characteristics of said feature quantity input receiving means standard X-ray projection data stored in the storage unit has acquired the subject, measuring photographing the subject at the arbitrary imaging condition Generating means for generating assumed object projection data indicating X-ray projection data assumed to be obtained when
Determining means for determining whether or not the measurement imaging end position has been reached based on a comparison result between actual X-ray projection data obtained by measuring and imaging the subject and the subject assumed projection data;
An X-ray CT apparatus comprising:
ことを特徴とする請求項1に記載のX線CT装置。 The determination unit reaches the end position of the measurement imaging when an error between the assumed projection data of the object and actual X-ray projection data obtained by measuring and imaging the object is equal to or less than a predetermined threshold. It is determined that
The X-ray CT apparatus according to claim 1.
ことを特徴とする請求項1に記載のX線CT装置。 The determination unit determines that an end position of the measurement imaging is determined when it is determined that an error between the assumed projection data of the object and actual X-ray projection data obtained by measuring and imaging the subject is a minimum value. To determine that
The X-ray CT apparatus according to claim 1.
前記判定手段は、前記被検体を計測撮影して得られた実際のX線投影データと前記被検体想定投影データとの比較結果に基づいて前記計測撮影の終了位置に到達したか否かを判定した結果、未だ終了位置に到達していないと判定した場合であっても、前記設定手段により設定された予定回転数の計測撮影が終了した場合には前記計測撮影を終了させる、
ことを特徴とする請求項1乃至3のいずれか一つに記載のX線CT装置。 It further comprises a setting means for setting the planned rotation speed of measurement photography,
The determination unit determines whether or not the measurement imaging end position has been reached based on a comparison result between actual X-ray projection data obtained by measuring and imaging the subject and the subject assumed projection data. As a result, even if it is determined that the end position has not yet been reached, the measurement imaging is terminated when the measurement imaging of the planned number of rotations set by the setting unit is completed.
The X-ray CT apparatus according to any one of claims 1 to 3.
前記生成手段は、The generating means includes
前記特徴量入力受付手段で取得された被検体の身長と、前記標準的な人体モデルの身長との比率である身長比を算出する身長比算出手段と、A height ratio calculating means for calculating a height ratio that is a ratio between the height of the subject acquired by the feature amount input receiving means and the height of the standard human body model;
前記特徴量入力受付手段で取得された被検体の体重と、前記標準的な人体モデルの体重との比率である体重比を算出する体重比算出手段と、A weight ratio calculating means for calculating a weight ratio that is a ratio between the weight of the subject acquired by the feature amount input receiving means and the weight of the standard human body model;
前記身長比算出手段において算出された身長比と、前記体重比算出手段において算出された体重比とに基づいて、投影データ拡大率を算出する拡大率算出手段と、An enlargement ratio calculating means for calculating a projection data enlargement ratio based on the height ratio calculated by the height ratio calculating means and the weight ratio calculated by the weight ratio calculating means;
前記格納手段に格納された標準X線データを前記拡大率算出手段において算出された投影データ拡大比だけ拡大することにより、前記被検体想定投影データを生成する手段と、Means for generating the subject assumed projection data by enlarging the standard X-ray data stored in the storage means by the projection data enlargement ratio calculated by the enlargement ratio calculating means;
を有することを特徴とする請求項1乃至4のいずれか一つに記載のX線CT装置。5. The X-ray CT apparatus according to claim 1, comprising:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005113678A JP4679951B2 (en) | 2005-04-11 | 2005-04-11 | X-ray CT system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005113678A JP4679951B2 (en) | 2005-04-11 | 2005-04-11 | X-ray CT system |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2006288739A JP2006288739A (en) | 2006-10-26 |
JP2006288739A5 true JP2006288739A5 (en) | 2008-05-29 |
JP4679951B2 JP4679951B2 (en) | 2011-05-11 |
Family
ID=37409997
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2005113678A Expired - Fee Related JP4679951B2 (en) | 2005-04-11 | 2005-04-11 | X-ray CT system |
Country Status (1)
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JP (1) | JP4679951B2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101689298B (en) * | 2006-12-22 | 2013-05-01 | 皇家飞利浦电子股份有限公司 | Imaging system and imaging method for imaging an object |
JP2014083085A (en) * | 2012-10-19 | 2014-05-12 | Toshiba Corp | Medical diagnostic apparatus, x-ray irradiation device, and x-ray irradiation method |
JP5634539B2 (en) * | 2013-02-06 | 2014-12-03 | キヤノン株式会社 | X-ray imaging device |
JP7450403B2 (en) * | 2020-03-03 | 2024-03-15 | 富士フイルムヘルスケア株式会社 | X-ray CT device |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6266599A (en) * | 1985-09-18 | 1987-03-26 | Hitachi Medical Corp | Radioscopic photographing apparatus |
JPH0695999B2 (en) * | 1990-01-09 | 1994-11-30 | 株式会社東芝 | CT scanner |
JPH05208004A (en) * | 1992-01-31 | 1993-08-20 | Toshiba Corp | X-ray ct system |
JP3434545B2 (en) * | 1993-11-01 | 2003-08-11 | 株式会社東芝 | X-ray CT scanner |
JPH09516A (en) * | 1995-06-23 | 1997-01-07 | Toshiba Medical Eng Co Ltd | X-ray computer tomographic system |
JPH0975335A (en) * | 1995-09-12 | 1997-03-25 | Hitachi Medical Corp | X-ray ct device |
JPH10162990A (en) * | 1996-11-29 | 1998-06-19 | Shimadzu Corp | X-ray fluoroscopy apparatus |
JP4322459B2 (en) * | 2002-02-12 | 2009-09-02 | 東芝医用システムエンジニアリング株式会社 | X-ray diagnostic equipment |
JP2003310592A (en) * | 2002-04-22 | 2003-11-05 | Toshiba Corp | Remote radiographing method, remote radiographing system, simulation method for medical image diagnostic apparatus, information processing service method, and modality simulator system |
-
2005
- 2005-04-11 JP JP2005113678A patent/JP4679951B2/en not_active Expired - Fee Related
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