JPS6173642A - Data collection method - Google Patents
Data collection methodInfo
- Publication number
- JPS6173642A JPS6173642A JP59194701A JP19470184A JPS6173642A JP S6173642 A JPS6173642 A JP S6173642A JP 59194701 A JP59194701 A JP 59194701A JP 19470184 A JP19470184 A JP 19470184A JP S6173642 A JPS6173642 A JP S6173642A
- Authority
- JP
- Japan
- Prior art keywords
- data collection
- data
- respiratory
- collection method
- measurement
- 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
Links
Landscapes
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の利用分野〕 一
本発明はＮＭＲ，−ＣＴに係り、特に短時間のデータ収
集に好適な呼吸同期データ収集方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to NMR and CT, and particularly to a respiratory gated data collection method suitable for short-time data collection.
呼吸による体動を解消するために、一般に呼吸同期によ
るデータ収集が行れる。しかし、呼吸同期によるデータ
収集を行えば、データ収集の周期は呼吸の周期よシも短
かくすることはできない。In order to eliminate body movements due to breathing, data collection can generally be performed using respiratory synchronization. However, if data collection is performed using respiratory synchronization, the data collection cycle cannot be made any shorter than the breathing cycle.
−従ってデータ収集には長時間を必要とした。- Therefore, data collection required a long time.
本発明の目的は、データ収集の周期を呼吸の周期よりも
短かくシ、呼吸同期による高速なデータ収集を可能とす
る方法を提供することにある。An object of the present invention is to provide a method that makes the data collection cycle shorter than the respiratory cycle and enables high-speed data collection through respiratory synchronization.
本発明で社、排気後、吸気までの間に複数のデータを収
集することでデータ収集の周期を短かくし、呼吸同期の
ＮＭＲ−ＣＴデータ収集時間を短縮したものである。The present invention shortens the data collection cycle by collecting a plurality of pieces of data between the time of exhaustion and the time of inspiration, thereby shortening the time required to collect respiratory-gated NMR-CT data.
以下本発明の詳細な説明する。 The present invention will be explained in detail below.
第１図はＮＭＲ−ＣＴの構成例である。コンピュータ１
１からインタフェース１０を通して勾配磁場のコントロ
ール信号が送信さｎると（ｌａ〜ｌｃ）アンプ２ａ〜２
Ｃで増巾されたのちにコイル３ａ〜３Ｃに入力し、磁場
勾配をつくる。患者には前記勾配磁場と同時にＲＦパル
スが加えられる（４，５．６）。患者からの信号はプリ
アンプ７で増巾されたのちに、レシーバ８、信号加算平
均部９を通してコンピュータ１１に送られる。FIG. 1 shows an example of the configuration of NMR-CT. computer 1
When a gradient magnetic field control signal is transmitted from 1 to 1 through an interface 10, (la to lc) amplifiers 2a to 2
After being amplified by C, it is input to coils 3a to 3C to create a magnetic field gradient. Simultaneously with the gradient magnetic field, an RF pulse is applied to the patient (4, 5.6). The signal from the patient is amplified by a preamplifier 7 and then sent to a computer 11 through a receiver 8 and a signal averaging section 9.
第２図は、前記ＮＭＲ−ＣＴを呼吸同期のデータ収集を
した例である。患者２１には、呼吸状態のモニタ２２が
ついている。モニタ２２は例えば第３図のような構成を
している。排気時にはスイッチ３２が閉じて３１が開く
、逆に吸気時には３２が開いて３１が閉じる。スイッチ
３１．３２ −が開閉する時の信号をもとにして、例え
ば、第４図の様なデータ収集を行う。排気終了時にスイ
ッチ３１が閉じるから計測を始める。吸気の始まる４３
ｃまで３回の計測をして、計測を休む。次の計測は排気
の終了する４４ａから行い、４４ｄで終了する。FIG. 2 is an example of data collection using the NMR-CT in a respiratory-gated manner. The patient 21 is equipped with a respiratory status monitor 22 . The monitor 22 has a configuration as shown in FIG. 3, for example. During exhaust, switch 32 closes and switch 31 opens; conversely, during intake, switch 32 opens and switch 31 closes. For example, data collection as shown in FIG. 4 is performed based on signals when the switches 31, 32 - open and close. Measurement starts when the switch 31 is closed when exhaustion is finished. Inhalation begins 43
Measure up to c three times and take a break from measurement. The next measurement is performed from 44a where exhaust ends, and ends at 44d.
これをフローチャートで書くと第５図のようになる。勾
配磁場を特定の方向に向ける（ステップ５０）モニタの
状態を読み込み（５２）排気終了していなければ５１に
もどり、終了していれば計測してデータを格納する（ス
テップ５５）。勾配磁場の方向を変えて、ディソイ（５
６，５７）ののちにモニタの状態を読み込み（５８）吸
気が始まっていなければ５４にもどり計測をくり返す。If you write this as a flowchart, it will look like Figure 5. The gradient magnetic field is directed in a specific direction (step 50). The monitor status is read (52). If the evacuation has not been completed, the process returns to 51, and if it has been completed, the measurement is performed and the data is stored (step 55). By changing the direction of the gradient magnetic field, disoi (5
After 6 and 57), the status of the monitor is read (58) and if the intake has not started, the process returns to 54 and the measurement is repeated.
始まっていればステップ６ｏに進み全角度計測終了かど
うかを判定し、終了していなければ５１にもどり、終了
していれば全計測を終了する。If it has started, the process advances to step 6o and it is determined whether or not all angle measurements have been completed; if not, the process returns to step 51, and if it has ended, all angle measurements are completed.
このデータを用いた画像再構成は例えば第６図のように
行う。４３ａで収集したデータから投影データ６６をつ
くり、メモリ７０に逆投影する。Image reconstruction using this data is performed, for example, as shown in FIG. Projection data 66 is created from the data collected in step 43a and back projected onto memory 70.
４３ｂで収集したデータからも投影データ６７をつく９
メモリ７０に逆投影する。以下同様である。Create projection data 67 from the data collected in 43b9
Back-projection to memory 70. The same applies below.
上記説明では、排気終了から吸気始めまでの間にデータ
を収集したが、吸気路りから排気始めまでの間にデータ
収集をしてもよい。In the above description, data was collected between the end of exhaust gas and the start of intake air, but data may be collected between the intake path and the start of exhaust gas.
本発明によれば、排気後、吸気までの間に複数のデータ
を収集することでデータ収集の周期を短かくできるため
に、データ収集時間を短縮できる。According to the present invention, the data collection cycle can be shortened by collecting a plurality of pieces of data between exhaustion and intake, so that the data collection time can be shortened.
第１図は本発明を実施するＮＭＲＣＴの構成図、第２図
は計測例を示す説明図、第３図はモニタの構成図、第４
図はデータ収集タイミングの説明線図、第５図は計測フ
ロー図、第６図は画像の再構成図である。
２２・・・呼吸状態モニタ、４２・・・呼吸曲線、６６
〜７０・・・投影データ。FIG. 1 is a configuration diagram of NMRCT that implements the present invention, FIG. 2 is an explanatory diagram showing a measurement example, FIG. 3 is a configuration diagram of a monitor, and FIG.
The figure is an explanatory diagram of data collection timing, FIG. 5 is a measurement flow diagram, and FIG. 6 is an image reconstruction diagram. 22...Respiration condition monitor, 42...Respiration curve, 66
~70...Projection data.
Claims (1)
タする手段を備え、排気後、吸気までの間に複数のデー
タを収集することを特徴とするデータ収集方法。1. In respiratory-gated NMR-CT, a data collection method comprising means for monitoring the respiratory state and collecting a plurality of data from exhaustion to inspiration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59194701A JPS6173642A (en) | 1984-09-19 | 1984-09-19 | Data collection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59194701A JPS6173642A (en) | 1984-09-19 | 1984-09-19 | Data collection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6173642A true JPS6173642A (en) | 1986-04-15 |
Family
ID=16328825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59194701A Pending JPS6173642A (en) | 1984-09-19 | 1984-09-19 | Data collection method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6173642A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61128953A (en) * | 1984-11-21 | 1986-06-17 | ゼネラル・エレクトリツク・カンパニイ | Reduction of artificial effect of nmr image |
| JPH034837A (en) * | 1989-06-01 | 1991-01-10 | Toshiba Corp | Magnetic resonance device for diagnosis |
-
1984
- 1984-09-19 JP JP59194701A patent/JPS6173642A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61128953A (en) * | 1984-11-21 | 1986-06-17 | ゼネラル・エレクトリツク・カンパニイ | Reduction of artificial effect of nmr image |
| JPH034837A (en) * | 1989-06-01 | 1991-01-10 | Toshiba Corp | Magnetic resonance device for diagnosis |
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