JP2013052016A5

JP2013052016A5 -

Info

Publication number: JP2013052016A5
Application number: JP2011190536A
Authority: JP
Filing date: 2011-09-01
Publication date: 2014-10-02
Anticipated expiration: 2031-09-01

Description

上記の課題を解決するために、本発明は、被検体を収容する空間に均一な静磁場を発生させる静磁場発生手段と、前記静磁場へ重畳して傾斜磁場を発生させる傾斜磁場発生手段と、前記被検体へ照射する高周波磁場を発生させる高周波磁場発生手段と、前記被検体から発生するNMR信号を検出する検出手段と、前記検出されたNMR信号を画像化する画像化手段と、前記傾斜磁場発生手段と前記高週波磁場発生手段と前記検出手段と前記画像化手段とを制御する制御部を備えたMRI装置であって、
前記制御部は、複数の撮像を計画する計画部を備え、該計画部は、前記複数の撮像のいずれかが実行中に中止された後にも、撮像を再開するための計画を再設定する再設定部を備えている。
In order to solve the above-described problems, the present invention provides a static magnetic field generation unit that generates a uniform static magnetic field in a space that accommodates a subject, and a gradient magnetic field generation unit that generates a gradient magnetic field superimposed on the static magnetic field. A high-frequency magnetic field generating means for generating a high-frequency magnetic field for irradiating the subject, a detecting means for detecting an NMR signal generated from the subject, an imaging means for imaging the detected NMR signal, and the tilt An MRI apparatus comprising a control unit for controlling a magnetic field generating means, the high frequency magnetic field generating means, the detecting means, and the imaging means,
The control unit includes a planning unit that plans a plurality of imaging, and the planning unit resets a plan for restarting imaging even after any of the plurality of imagings is stopped during execution. A setting unit is provided.

最初に、本発明に係る被検体を収容する空間に均一な静磁場を発生させる静磁場発生手段と、静磁場へ重畳して傾斜磁場を発生させる傾斜磁場発生手段と、被検体へ照射する高周波磁場を発生させる高周波磁場発生手段と、被検体から発生するNMR信号を検出する検出手段と、検出されたNMR信号を画像化する画像化手段と、傾斜磁場発生手段と高週波磁場発生手段と検出手段と画像化手段とを制御する制御部を備えたMRI装置の一例の全体概要を図1に基づいて説明する。図1は、本発明に係るMRI装置の一実施例の全体構成を示すブロック図である。このMRI装置は、NMR現象を利用して被検体の断層画像を得るもので、図1に示すように、MRI装置は静磁場発生系2と、傾斜磁場発生系3と、送信系5と、受信系6と、信号処理系7と、シーケンサ4と、中央処理装置(CPU)8とを備えて構成される。
First, a static magnetic field generation unit that generates a uniform static magnetic field in a space that accommodates the subject according to the present invention, a gradient magnetic field generation unit that generates a gradient magnetic field superimposed on the static magnetic field, and a high frequency that irradiates the subject High-frequency magnetic field generating means for generating a magnetic field, detecting means for detecting an NMR signal generated from the subject, imaging means for imaging the detected NMR signal, gradient magnetic field generating means, high-frequency magnetic field generating means, and detection An overall outline of an example of an MRI apparatus provided with a control unit for controlling the means and the imaging means will be described with reference to FIG. FIG. 1 is a block diagram showing the overall configuration of an embodiment of an MRI apparatus according to the present invention. This MRI apparatus uses a NMR phenomenon to obtain a tomographic image of a subject.As shown in FIG. 1, the MRI apparatus includes a static magnetic field generation system 2, a gradient magnetic field generation system 3, a transmission system 5, A reception system 6, a signal processing system 7, a sequencer 4, and a central processing unit (CPU) 8 are provided.

図4は、本発明の実施例1におけるMRI装置の動作の一例を示すフローチャートである。次に該フローチャートの各ステップを順に説明する。
Figure 4 is a flow chart showing an example of the operation of an MRI apparatus in Example 1 of the present invention. Next, each step of the flowchart will be described in order.

(ステップ43)
操作者は、ステップ37で撮像中止の指令を入力した時計画(予約)していた撮像(ここでは、T2強調撮像とFLAIR撮像)を含めて再開するかを判断する。具体的には、図7におけるメニューバーの“撮像中だった撮像を含めて再開する”を選択すると、第2の判断部8eにより、図7で示されていたメニューバーが閉じて、図8で示されていたようなメニューバーが表示され、ステップ37で計画中止の指令を入力した時計画していた撮像を含めて再開するか、含めないで再開するかを選択できるようになっている。ステップ37で撮像中止の指令を入力した時計画していた撮像を含めて再開する場合は、ステップ45へ、含めて再開しない場合はステップ44へ移行する。
(Step 43)
The operator determines whether or not to restart including imaging (in this case, T2-weighted imaging and FLAIR imaging) that was planned (reserved) when the imaging stop command was input in step 37. Specifically, when “Resume including imaging that was being captured” is selected from the menu bar in FIG. 7, the second determination unit 8e closes the menu bar shown in FIG. The menu bar as shown in is displayed, and it is possible to select whether to restart with or without including the imaging that was planned when the planned stop command was input in step 37 . When restarting including imaging planned when the imaging stop command is input in step 37, the process proceeds to step 45, and when not restarting including it, the process proceeds to step 44.

(ステップ52)
操作者が、ステップ52で図5で示した表示画面を操作すると、入れ替え部8fは、撮像の順番を入れ替える。具体的に図5で表示されている撮像のうち、検査の変更や、被検体の体調の変化などにより、撮像-Bを撮像Cの後に撮像したい場合、操作者は、マウスにより撮像-Cをドラッグし、撮像-Aと撮像-Bの間にドロップすることで、撮像順を容易に変更できる。例えば2番目に撮像予定であるT2強調画像の撮像と、3番目に撮像予定であるFLAIR画像の撮像の順番を入れ替えて、FLAIR強調画像の撮像を2番目の撮像予定とし、T2強調画像の撮像を、3番目の撮像予定とする。図11は、順番を入れ替える際に画面がどうなるかを示したものであり、撮像-Cのボックスをドラッグすると、入れ替え部8eにより、撮像-Aと撮像-Bの間が太くなり、挿入可能になることが示されている。(ここで、同じく図5で表示されている撮像のうち、撮像する時間が長く、待たせている患者が多いため今回は撮像-Cを不要と判断した場合等に、画面上に表示されているチェックボックスなどを操作することにより簡単に撮像対象からはずすことができても良い。)
(ステップ53)
操作者は、追加で計画(予約)したい撮像があるかを判断する。撮像を追加したい場合は、ステップ54へ、撮像を追加したくない場合はステップ55へ移行する。
(Step 52)
When the operator operates the display screen shown in FIG. 5 in step 52, the switching unit 8f switches the imaging order. Specifically, among the images displayed in FIG. 5, when imaging-B is desired to be performed after imaging C due to a change in examination or a change in the physical condition of the subject, the operator performs imaging-C with the mouse. By dragging and dropping between Imaging-A and Imaging-B, the imaging order can be easily changed. For example, the T2 weighted image, which is scheduled to be captured second, and the FLAIR image, which is scheduled to be captured third, are swapped in order to capture the second image, and the T2 weighted image is captured. Is the third imaging plan. Fig. 11 shows what happens to the screen when the order is changed. When the box for Imaging-C is dragged, the replacement unit 8e makes the area between Imaging-A and Imaging-B thick so that it can be inserted. It has been shown to be. (Here, of the images displayed in Fig. 5 again, it is displayed on the screen when it is determined that Imaging-C is unnecessary this time because it takes a long time to wait and many patients are waiting. (You may be able to easily remove it from the imaging target by operating the check box etc.)
(Step 53)
The operator determines whether there is an additional image to be planned (reserved). If it is desired to add an image, the process proceeds to step 54 ; otherwise, the process proceeds to step 55.

(ステップ59)
計測制御部8bは、ステップ37で計測中止の指令を入力した時計測中だった計測(ここではT2強調撮像)を含めて、被検体の状態が安定してから再開する。
(Step 59)
The measurement control unit 8b restarts after the state of the subject is stabilized, including the measurement (in this case, T2-weighted imaging) that was being performed when the measurement stop command was input in step 37.

(ステップ61)
計測制御部8bは、数分たってから再開する。
(Step 61)
The measurement control unit 8b resumes after several minutes .

Claims

A static magnetic field generating means for generating a uniform static magnetic field in a space in which the subject is accommodated, a gradient magnetic field generating means for generating a gradient magnetic field superimposed on the static magnetic field, and a high frequency for generating a high-frequency magnetic field for irradiating the subject Magnetic field generation means, detection means for detecting NMR signals generated from the subject, imaging means for imaging the detected NMR signals, gradient magnetic field generation means, high frequency magnetic field generation means, and detection A magnetic resonance imaging apparatus comprising a control unit for controlling the means and the imaging means,
The control unit includes a planning unit that plans a plurality of imaging, and the planning unit resets a plan for restarting imaging even after any of the plurality of imagings is stopped during execution. A magnetic resonance imaging apparatus comprising a setting unit.

The magnetic resonance imaging apparatus according to claim 1, wherein the planning unit plans the order of execution of the plurality of imaging, and the resetting unit includes a replacement unit that switches the order of execution.

The magnetic resonance imaging apparatus according to claim 1, wherein the resetting unit includes an addition unit that adds an additional imaging plan in addition to the imaging planned by the planning unit.

2. The magnetic resonance imaging apparatus according to claim 1, wherein the resetting unit includes a first determination unit that accepts whether to capture an image including an image captured at the time of the cancellation.

5. The magnetic resonance imaging apparatus according to claim 1, wherein the resetting unit includes a second determination unit that accepts whether to perform imaging including imaging planned at the time of cancellation. 6.

A recording unit for recording stop status at the time of the stop, magnetic resonance imaging according to claim 1, further comprising a presentation unit that presents the resume protocol according to abort status recorded in the recording unit apparatus.

Button when resuming the imaging is made from the main unit and optional unit, by using the option unit, a magnetic resonance imaging apparatus according to claim 1, characterized in that can select a protocol to resume.