JPH0898834A - X-ray ct system - Google Patents
X-ray ct systemInfo
- Publication number
- JPH0898834A JPH0898834A JP6235284A JP23528494A JPH0898834A JP H0898834 A JPH0898834 A JP H0898834A JP 6235284 A JP6235284 A JP 6235284A JP 23528494 A JP23528494 A JP 23528494A JP H0898834 A JPH0898834 A JP H0898834A
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- processing
- ray
- analysis processing
- analysis
- image
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Links
- 238000012545 processing Methods 0.000 claims abstract description 106
- 238000004458 analytical method Methods 0.000 claims abstract description 69
- 238000005259 measurement Methods 0.000 claims abstract description 18
- 238000013480 data collection Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims description 40
- 238000002591 computed tomography Methods 0.000 claims description 6
- 238000010191 image analysis Methods 0.000 claims description 5
- 238000007781 pre-processing Methods 0.000 abstract description 8
- 230000009466 transformation Effects 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 6
- 238000000691 measurement method Methods 0.000 description 5
- 239000011295 pitch Substances 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 238000012935 Averaging Methods 0.000 description 2
- 210000004204 blood vessel Anatomy 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
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- Apparatus For Radiation Diagnosis (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、X線CT装置、特に画
像再構成とその再構成画像の解析処理とを迅速に行うX
線CT装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray CT apparatus, and more particularly, an X-ray CT apparatus for rapidly performing image reconstruction and analysis processing of the reconstructed image.
Line CT apparatus.
【0002】[0002]
【従来の技術】X線CT装置は、従来、X線スキャン計
測を行うこと、この計測で求めたX線検出信号から画像
再構成を行うこと、を目的としていた。最近の画像処理
技術の向上によって、画像再構成にとどまらず、再構成
画像を更に解析処理する機能がX線CT装置に要求され
ている。2. Description of the Related Art Conventionally, an X-ray CT apparatus has been aimed at performing X-ray scan measurement and performing image reconstruction from an X-ray detection signal obtained by this measurement. Due to recent improvements in image processing technology, the X-ray CT apparatus is required to have a function of further analyzing and processing reconstructed images as well as image reconstruction.
【0003】[0003]
【発明が解決しようとする課題】本発明の目的は、画像
再構成を行った後で即座に計画通りこの再構成画像の解
析処理を可能にするX線CT装置を提供するものであ
る。SUMMARY OF THE INVENTION An object of the present invention is to provide an X-ray CT apparatus which enables analysis processing of this reconstructed image immediately after the image reconstruction and according to a plan.
【0004】[0004]
【課題を解決するための手段】本発明は、X線スキャン
と、被検体搭載テーブルと、X線スキャンと被検体搭載
テーブルとを相互に制御しながら得たX線CTスキャン
計測で得た収集データから複数スライスの再構成画像を
得る再構成手段と、複数スライスの再構成画像を解析す
る解析手段と、を有すると共に、上記CTスキャン計測
でのデータの収集及び収集データに基づいて再構成手段
による再構成処理と、解析手段による複数スライスの再
構成画像の解析処理と、を連続して実行できるようにシ
ーケンス構成し、このシーケンス動作に必要なスキャン
条件及び解析処理条件を、上記CTスキャンの開始前に
設定させることとしたX線CT装置を開示する。According to the present invention, an X-ray scan, a subject mounting table, and an X-ray CT scan measurement obtained by mutually controlling the X-ray scan and the subject mounting table are acquired. Reconstructing means for obtaining a reconstructed image of a plurality of slices from data, and analyzing means for analyzing the reconstructed image of a plurality of slices are provided, and the reconstructing means is based on the data collection in the CT scan measurement and the collected data. And the analysis processing of the reconstructed images of a plurality of slices by the analysis means are performed in sequence so that the scan conditions and analysis processing conditions necessary for this sequence operation are set to the CT scan An X-ray CT apparatus to be set before the start will be disclosed.
【0005】[0005]
【作用】本発明によれば、データ収集及び再構成と、解
析処理とが連続して実行できることとなり、特にその実
行の連続性を具体的に担保する条件の、スキャン条件及
び解析処理条件をCTスキャン計測前に設定させること
とした。これによって、再構成後、解析処理条件を設定
させることがなくなり、再構成像を迅速に次の処理であ
る解析処理に利用できることになり、自動的な連続処理
が可能となった。According to the present invention, the data collection and reconstruction and the analysis processing can be continuously executed. Especially, the scan condition and the analysis processing condition, which are the conditions for specifically ensuring the continuity of the execution, are CT. It was decided to set it before scan measurement. As a result, after the reconstruction, the analysis processing condition is not set and the reconstructed image can be promptly used for the next processing, that is, the analysis processing, and the automatic continuous processing becomes possible.
【0006】[0006]
【実施例】X線CT装置によって画像再構成とその解析
処理とを行わせるために本実施例では、画像再構成を実
行させる処理を先に行い、その後で解析処理を行う、シ
ーケンスをX線CT装置に組み込み、それを実行させる
ようにした。EXAMPLE In order to perform the image reconstruction and its analysis processing by the X-ray CT apparatus, in this embodiment, the processing for executing the image reconstruction is performed first, and then the analysis processing is performed. It was installed in the CT device and it was executed.
【0007】シーケンス例を図2に示す。図2(イ)
は、「データ収集」を5回行い、各回毎に収集と同時に
「画像再構成」を行い、全体の画像再構成後に「解析処
理」を行わせるようにしたものである。図2(ロ)は全
体の再構成を待つことなく、各再構成後に引続き「画像
解析」を行わせるようにしたものである。An example of the sequence is shown in FIG. Figure 2 (a)
In the system, "data collection" is performed 5 times, "image reconstruction" is performed simultaneously with each collection, and "analysis processing" is performed after the entire image reconstruction. In FIG. 2B, the "image analysis" is continuously performed after each reconstruction without waiting for the entire reconstruction.
【0008】ここで、図2のシーケンスでの画像解析に
は種々の内容がある。その代表的な例を以下に示す。 (1)、シネ表示処理。 画像解析の概念には入れにくいが、複数の再構成画像を
外部メモリから読出して連続表示で動画的表示を行う処
理である。即ち、再構成画像は、一度ハードディスク等
の外部メモリに格納される。このシネ表示処理は、上記
外部メモリからの再構成画像の読出し作業と、読出した
再構成画像を表示メモリに連続的に送りCRTに次々に
連続的に表示させる作業と、より成る。広義の画像解析
に相当する。かかるシネ表示処理は、図2(イ)のシー
ケンスで実現する。或は図2(ロ)のシーケンスによっ
て実現する。Here, the image analysis in the sequence of FIG. 2 has various contents. A typical example is shown below. (1), cine display processing. Although it is difficult to put it into the concept of image analysis, this is a process of reading a plurality of reconstructed images from an external memory and performing moving image display in continuous display. That is, the reconstructed image is once stored in an external memory such as a hard disk. This cine display processing consists of the work of reading the reconstructed images from the external memory and the work of continuously sending the read reconstructed images to the display memory and displaying them one after another on the CRT. Corresponds to image analysis in a broad sense. The cine display process is realized by the sequence of FIG. Alternatively, it is realized by the sequence of FIG.
【0009】(2)、三次元表示処理。 複数の再構成画像を積み上げて三次元画像を得る作業
と、それを投影面に投影(平行投影や中心投影)して投
影三次元画像を得る作業と、投影三次元画像を二次元C
RT面に疑似三次元画像として表示させる作業とより成
る。積み上げた場合に、互いに隣合う断層面にすき間が
でることがあり、相隣合う断層面間で補間処理を行い補
間画像を得、その補間画像で断層面間を埋め合わせて高
精細三次元画像を得る処理も含まれる。また、疑似三次
元画像にリアルティをもたせるために、奥行き方向に重
なり合った画素相互にあっては一番手前の画素のみを表
示させる隠面化処理、視点から遠い距離の画素濃度は暗
くし、視点から近い距離の画素濃度は明るくする陰影化
処理も含まれる。この処理は図2(イ)のシーケンスで
実現する。図2(ロ)のシーケンスによっても実現でき
る。(2) Three-dimensional display processing. A task of stacking a plurality of reconstructed images to obtain a three-dimensional image, a task of projecting the three-dimensional image on a projection surface (parallel projection or central projection), and a three-dimensional image of the projected three-dimensional image.
It consists of the work of displaying as a pseudo three-dimensional image on the RT surface. When stacked, there may be a gap between adjacent tomographic planes.Interpolation processing is performed between adjacent tomographic planes to obtain an interpolated image, and the interpolated images are used to fill up the tomographic planes to obtain a high-definition three-dimensional image. The process of obtaining is also included. In addition, in order to give the pseudo three-dimensional image a realism, in the pixels overlapping in the depth direction, only the foremost pixel is displayed in the hidden surface processing, and the pixel density at a distance from the viewpoint is darkened. A shading process for brightening the pixel density at a short distance from the viewpoint is also included. This process is realized by the sequence of FIG. It can also be realized by the sequence of FIG.
【0010】(3)、任意断面変換処理。 (2)で説明したように複数の再構成画像(補間画像を
含む)を積み上げて三次元画像を得ると共に、その三次
元画像に対して、設定した斜め方向からの断面によって
切取り、その切断面を求める処理である。この処理は図
2(イ)のシーケンスで実現できる。図2(ロ)のシー
ケンスによっても実現できる。(3) Arbitrary section conversion processing. As described in (2), a plurality of reconstructed images (including interpolated images) are stacked to obtain a three-dimensional image, and the three-dimensional image is cut by a set cross section from an oblique direction and a cut surface thereof. Is a process for obtaining. This processing can be realized by the sequence of FIG. It can also be realized by the sequence of FIG.
【0011】(4)、最大密度投影処理。 複数の再構成画像(補間画像を含む)を積み上げて三次
元画像を得ると共に、奥行き方向に重なり合った画素相
互にあって、最大濃度の画素を選択して表示する処理で
ある。これは曲がりくねった血管抽出や観察に適した画
像となる。この処理は、図2(イ)、(ロ)どちらでも
実現できる。(4) Maximum density projection processing. This is a process of stacking a plurality of reconstructed images (including interpolated images) to obtain a three-dimensional image, and selecting and displaying a pixel having the maximum density between pixels overlapping in the depth direction. This is an image suitable for tortuous blood vessel extraction and observation. This process can be realized by either of FIG.
【0012】(5)、画像平均処理。 複数の再構成画像(補間画像を含む)を積み上げて三次
元画像を得ると共に、奥行き方向に重なり合った全画素
について、その濃度平均値を求める処理である。これは
再構成画像からX線透視像を得る処理である。この処理
は図2(イ)、(ロ)のどちらでも実現できる。(5) Image averaging process. This is a process in which a plurality of reconstructed images (including interpolation images) are stacked to obtain a three-dimensional image, and the density average value of all pixels that overlap in the depth direction is calculated. This is a process of obtaining an X-ray fluoroscopic image from the reconstructed image. This processing can be realized by either of FIG.
【0013】(6)、関心領域抽出処理。 積み上げて三次元画像を得る前に、各断層面の再構成画
像について関心領域を抽出し、この関心領域を三次元画
像として積み上げる例である。関心領域の抽出は基準と
なるしきい値を設定しておき、このしきい値よりも大ま
たは小の画素濃度の画素を抽出するやり方がある。再構
成画像を得る毎に処理が可能なため、図2(ロ)のシー
ケンスが適している。(6) Region of interest extraction processing. This is an example in which a region of interest is extracted from the reconstructed images of each tomographic plane before being stacked to obtain a three-dimensional image, and the region of interest is stacked as a three-dimensional image. There is a method of extracting a region of interest by setting a threshold value as a reference and extracting pixels having a pixel density larger or smaller than this threshold value. Since the processing can be performed every time the reconstructed image is obtained, the sequence of FIG. 2B is suitable.
【0014】次に、シーケンスを実現するための各種の
プリセット条件について説明する。CTスキャナによ
る、計測によっての「データ収集」にあっては、スキャ
ン条件をプリセットしておかなければならない。解析処
理にあっては、上記(1)〜(6)の例示にある中から
どの解析処理をするのかをプリセットしておかなければ
ならない。Next, various preset conditions for realizing the sequence will be described. In "data collection" by measurement by a CT scanner, scan conditions must be preset. In the analysis process, it is necessary to preset which analysis process is performed from the examples in the above (1) to (6).
【0015】(1)、スキャン条件の指定 (イ)、計測法の指定 (a)、体軸方向での間欠計測法の指定。 これは体軸方向に規定ピッチ毎にCT計測を行う例であ
る。被検体を搭載したテーブルが規定ピッチずつ移動
し、各規定ピッチ位置でCT計測を行うやり方をとる。 (b)、体軸方向で連続計測法(即ち、ら旋スキャン計
測法)の指定。 これはX線スキャナを回転させておくと共に、被検体を
搭載したベッドを連続的に移動させて、被検体に対して
ら旋スキャンを行わせるようにしたものである。尚、こ
のら旋計測で得たら旋スキャンデータ及び又はその補間
データを利用して、再構成演算部で、任意の再構成位置
での再構成画像が得られる。(1), designation of scan conditions (a), designation of measurement method (a), designation of intermittent measurement method in the body axis direction. This is an example in which CT measurement is performed at regular pitches in the body axis direction. The table on which the subject is mounted moves by a specified pitch, and CT measurement is performed at each specified pitch position. (B) Designation of continuous measurement method (that is, spiral scan measurement method) in the body axis direction. This is one in which the X-ray scanner is rotated and the bed on which the subject is mounted is continuously moved to allow the subject to perform a helical scan. In addition, if the swirl measurement is used to obtain the swirl scan data and / or the interpolation data thereof, the reconstructing calculation unit can obtain a reconstructed image at an arbitrary reconstructed position.
【0016】(ロ)、各計測法に即したスキャン条件の
指定。 (a)、(b)のいずれかの計測法にも共通するスキャ
ン条件としては、管電流、管電圧、スライス厚、スキャ
ン時間(X線スキャナの1回転する時間)等がある。
(a)に特有の条件にはピッチ幅の指定があり、(b)
に特有の条件には再構成位置の指定がある。ここで再構
成位置の指定とは(a)でのピッチ幅に相当するもの
で、再構成位置(スライス面)の指定である。 (2)、解析処理の指定。 (イ)、前期(1)〜(6)の処理内容の1つまたは2
つ以上を指定することである。2つ以上の指定を行う場
合は、それらの解析処理の、処理順序を指定することに
なる。(B) Designation of scanning conditions according to each measuring method. The scan conditions common to either of the measurement methods (a) and (b) include tube current, tube voltage, slice thickness, scan time (time for one rotation of the X-ray scanner), and the like.
The condition peculiar to (a) includes designation of the pitch width, and (b)
The condition peculiar to is to specify the reconstruction position. The designation of the reconstruction position corresponds to the pitch width in (a), and is the designation of the reconstruction position (slice plane). (2), designation of analysis processing. (A), one or two of the processing contents of the previous term (1) to (6)
To specify more than one. When two or more designations are made, the processing order of those analysis processes is designated.
【0017】(ロ)、各指定した解析処理に必要な解析
処理条件の指定。 シネ表示処理……全構成画像表示か一部再構成画像表示
かの指定。一部再構成画像表示にあってはその再構成画
像番号の指定。動画表示速度の指定。 三次元表示処理…平行投影法か中心投影法かの指定。視
点が点光源か面光源かの指定。投影面位置の指定。投影
面からの、表示のための切り出し位置の指定。陰影化の
やり方の指定。(B) Designation of analysis processing conditions necessary for each designated analysis processing. Cine display processing …… Specifies whether to display all or partially reconstructed images. For partial reconstructed image display, specify the reconstructed image number. Specify the video display speed. Three-dimensional display processing ... Specify parallel projection or central projection. Specify whether the viewpoint is a point light source or a surface light source. Specify the projection plane position. Specify the cutout position for display from the projection surface. Specify the shading method.
【0018】(ハ)、任意断面変換処理に必要な解析処
理条件の指定。断面の指定。 (ニ)、関心領域抽出処理に必用な解説処理条件の指
定。基準しきい値の指定。 (ホ)、その他。 最大密度投影処理や画像平均処理でも、プリセット条件
があれば指定できる。また、以上の(イ)〜(ニ)は、
プリセット例であるが、一度プリセットした内容であっ
ても、実際の解析処理中または処理結果の表示内容に対
する、オペレータによるマンマシン操作により、種々変
更可能である。(C) Designation of analysis processing conditions necessary for arbitrary cross section conversion processing. Specify the cross section. (D) Specify the explanation processing conditions necessary for the region of interest extraction processing. Specifying a reference threshold. (E), others. Maximum density projection processing and image averaging processing can be specified if there are preset conditions. In addition, the above (a) to (d)
Although it is a preset example, even the preset content can be variously changed by the man-machine operation by the operator for the actual analysis processing or the display content of the processing result.
【0019】プリセットしておく時期としては、以下の
例がある。 (1)、一連のシーケンスが始まる前に設定しておくや
り方。 これは、図2(イ)、(ロ)で「データ収集」に先立っ
て前記全ての条件をプリセットしておくやり方である。
このやり方によれば、全ての条件をプリセットしておく
ことで、そのシーケンスに沿った実行が迅速になされ
る。 (2)、一連のシーケンスの中で主要なシーケンスの実
行前にプリセットするやり方。 これは、図3に示す例であり、全再構成後に解析処理を
行う例に適用され、「データ収集」と「再構成」の前
に、スキャン条件、再構成条件の2つをプリセットさせ
ておき、この条件に沿って「データ収集」及び「再構
成」を行わせる。更に、「解析処理」を行う前に、残り
の条件である解析処理条件をプリセットして、この後で
「解析処理」を行わせる。このやり方は、データ収集と
再構成とより成るシーケンスと、解析処理より成るシー
ケンスを分離しておき、別々にプリセットする例に適用
するとよい。しかし、解析処理条件は、データ収集・再
構成のための条件と一緒に設定しておいてデータ処理上
何ら問題はない。またデータ収集・再構成での個々の再
構成後、解析処理を逐次行わせるやり方をシステムとし
てとることも可能(図2(ロ)が該当)であり、こうし
た場合、データ収集に先立って、解析処理の条件を含め
たすべての条件をプリセットしておく(1)のやり方
は、図2の(ロ)のシーケンスに特に適している。The following are examples of preset times. (1) A method of setting before a series of sequences starts. This is a method of presetting all of the above conditions prior to "data collection" in FIGS.
According to this method, by presetting all the conditions, the execution along the sequence can be performed quickly. (2) A method of presetting before execution of a main sequence in a series of sequences. This is an example shown in FIG. 3, and is applied to an example in which analysis processing is performed after total reconstruction, and two scan conditions and reconstruction conditions are preset before “data collection” and “reconstruction”. Then, "data collection" and "reconstruction" are performed according to this condition. Furthermore, before performing the "analysis process", the analysis process condition which is the remaining condition is preset and the "analysis process" is performed after this. This method may be applied to an example in which a sequence consisting of data collection and reconstruction and a sequence consisting of analysis processing are separated and preset separately. However, there is no problem in data processing if the analysis processing condition is set together with the condition for data collection / reconstruction. In addition, it is also possible to adopt a system in which the analysis process is performed sequentially after each reconstruction in data collection / reconstruction (see Figure 2 (b)). In such a case, analysis can be performed prior to data collection. The method of (1) in which all the conditions including the processing conditions are preset is particularly suitable for the sequence of (b) of FIG.
【0020】次に解析処理のシーケンスについて述べ
る。「解析処理」は、前処理と本処理とに分けることが
できる。前処理とは、外部メモリから再構成画像を読出
して解析処理用メモリに書込む処理であり、本処理と
は、解析処理用メモリの再構成画像を用いて解析処理そ
のものを行う処理及びその結果を表示させる処理であ
る。前処理には、簡単な演算処理を含むこともある。本
処理には処理中にオペレータによってマンマシン操作で
意図に応じた処理を行わせることも含む。Next, the sequence of analysis processing will be described. The “analysis process” can be divided into a preprocess and a main process. The pre-processing is the processing of reading the reconstructed image from the external memory and writing it in the analysis processing memory, and the main processing is the processing of performing the analysis processing itself using the reconstructed image of the analysis processing memory and the result thereof. Is a process for displaying. The pre-processing may include simple arithmetic processing. This process also includes causing the operator to perform a process according to the intention by man-machine operation during the process.
【0021】こうした前処理と本処理とを考慮したシー
ケンス例を図1、図4に示す。いずれもデータ収集前に
全プリセット条件を設定させた例である。図1は、画像
再構成毎に、その終了を待って当該再構成画像を解析処
理用メモリに送り書込むようにしたものである(前処
理)。更に、5つの再構成画像の解析処理用メモリへ格
納した後で、解析処理を行わせた(本処理)。このシー
ケンスによれば、事前に全プリセット条件をセットさせ
ておくことで、再構成終了毎に解析処理用メモリへの格
納、そして全画像格納後直ちに本処理を実行できるとの
効果がある。Sequence examples in consideration of such pre-processing and main processing are shown in FIGS. 1 and 4. All are examples in which all preset conditions are set before data collection. In FIG. 1, after each image reconstruction, the reconstructed image is sent to and written in the analysis processing memory after the completion (preprocessing). Furthermore, after the five reconstructed images were stored in the analysis processing memory, the analysis processing was performed (main processing). According to this sequence, by setting all the preset conditions in advance, it is possible to store this in the analysis processing memory each time reconstruction is completed, and to execute this processing immediately after storing all images.
【0022】図4は、シネ表示処理に好適なら旋スキャ
ンデータを表示するシーケンス例であり、データ収集を
連続的に5回分行い、その後で画像再構成を行う。更
に、1つの画像再構成終了毎にその再構成画像を、解析
処理用メモリに送り(シネ表示前処理)、5つの再構成
画像の書込み後、シネ表示本処理でもある5つの再構成
画像の連続表示を行い、動画的に再構成像を示すことに
なる(シネ表示後処理)。このシーケンスによれば、再
構成毎に解析処理用メモリに再構成像を書込むことにな
り、全5つの再構成像の書込み完了と同時にシネ表示本
処理が実行できる。この際、全プリセット条件をデータ
収集前にセットしておいたため、処理の中断がなく、連
続的なシーケンス処理を実現できる。FIG. 4 shows an example of a sequence in which the scan data is displayed if it is suitable for the cine display process. Data acquisition is continuously performed five times, and then image reconstruction is performed. Further, each time one image reconstruction is completed, the reconstructed image is sent to the memory for analysis processing (cine display preprocessing), after writing five reconstructed images, the five reconstructed images which are also cine display main processing Continuous display is performed and a reconstructed image is shown in a moving image (cine display post-processing). According to this sequence, the reconstructed images are written in the analysis processing memory for each reconstruction, and the cine display main process can be executed at the same time when the writing of all five reconstructed images is completed. At this time, since all preset conditions are set before data collection, continuous sequence processing can be realized without interruption of processing.
【0023】尚、図1〜図4は、一連のシーケンスとし
たが、これは、このシーケンスを実現できるようにプロ
グラムが組み込まれているとの意味を含むものである。
即ち、技術用語としての狭い意味のシーケンスというだ
けでなく、シーケンスという用語を使うことなく、図1
〜図4の各動作流れを実現するようにプログラムしてい
る場合も含むものである。Although FIGS. 1 to 4 show a series of sequences, this means that a program is incorporated so that this sequence can be realized.
That is, not only a narrow-sense sequence as a technical term, but also the sequence
~ This also includes the case where programming is performed so as to realize each operation flow in Fig. 4.
【0024】図5はX線CT装置のシステム構成図であ
る。X線CT装置は、解析処理条件入力部1、スキャン
条件入力部2、制御・処理部3、再構成演算部4、解析
処理部5、表示部6、共通バス7、記録部8、CT本体
部10より成る。入力部1からは解析処理条件を入力し
解析処理部5に設定する。入力部2からはスキャン条件
(再構成条件を含む)を入力し、制御・処理部3に設定
する。この入力部1、2による条件の設定は、X線計測
に先立って事前に行う。制御・処理部3は、CT本体部
10をその設定したスキャン条件によって制御し、テー
ブル10B上に搭載された被検体に対してX線スキャン
10AによりX線CT計測を行う。この計測には、先に
述べたように間欠的にテーブル10Bを移動するやり方
と、連続的にテーブル10Bを移動するやり方(ら旋ス
キャン計測)とがある。FIG. 5 is a system configuration diagram of the X-ray CT apparatus. The X-ray CT apparatus includes an analysis processing condition input unit 1, a scan condition input unit 2, a control / processing unit 3, a reconstruction calculation unit 4, an analysis processing unit 5, a display unit 6, a common bus 7, a recording unit 8, a CT body. It consists of part 10. Analysis processing conditions are input from the input unit 1 and set in the analysis processing unit 5. Scan conditions (including reconstruction conditions) are input from the input unit 2 and set in the control / processing unit 3. The conditions are set by the input units 1 and 2 in advance before the X-ray measurement. The control / processing unit 3 controls the CT main body unit 10 according to the set scan conditions, and performs X-ray CT measurement on the subject mounted on the table 10B by the X-ray scan 10A. This measurement includes a method of intermittently moving the table 10B as described above and a method of continuously moving the table 10B (helical scan measurement).
【0025】更に制御部3は、そのX線計測値をデータ
として収集し、必要な前処理(対数変換や座標変換等)
を行う。再構成部4は、再構成位置での再構成を行い、
その再構成像を外部メモリとしての記録部8に格納す
る。Further, the control unit 3 collects the X-ray measurement values as data and performs necessary preprocessing (logarithmic conversion, coordinate conversion, etc.).
I do. The reconstruction unit 4 performs reconstruction at the reconstruction position,
The reconstructed image is stored in the recording unit 8 as an external memory.
【0026】解析処理部5は、解析処理演算部5Aと解
析処理用メモリ5Bとより成る。メモリ5Bには、前処
理によって記録部8からの再構成画像が書込まれ、解析
処理演算部5Aがこの再構成画像に対して、入力部1か
らの解析処理条件に従って必要な解析処理を行う。この
解析結果は、表示部6に送られて表示され、また表示中
の画像はマンマシン処理対象としてオペレータによって
種々処理変更指示される。また、解析処理結果は記録部
8に送られて記録される。The analysis processing section 5 comprises an analysis processing calculation section 5A and an analysis processing memory 5B. The reconstructed image from the recording unit 8 is written in the memory 5B by the preprocessing, and the analysis processing operation unit 5A performs necessary analysis processing on the reconstructed image according to the analysis processing condition from the input unit 1. . The analysis result is sent to and displayed on the display unit 6, and the image being displayed is instructed by the operator to perform various processing changes as a man-machine processing target. Further, the analysis processing result is sent to and recorded in the recording unit 8.
【0027】図5の実施例は、制御・処理部3が、図1
〜図4のデータ収集・再構成のシーケンスを管理し、解
析処理部5が解析処理用シーケンスを管理する。この管
理方法は、一種のパイプライン制御データある。In the embodiment shown in FIG. 5, the control / processing section 3 has the same configuration as that shown in FIG.
4 manages the data collection / reconstruction sequence in FIG. 4, and the analysis processing unit 5 manages the analysis processing sequence. This management method is a kind of pipeline control data.
【0028】[0028]
【発明の効果】本発明によれば、スキャン条件及び解析
処理条件を、CTスキャン開始前に設定させておくこと
としたため、再構成像を迅速に次の処理である解析処理
に利用できることとなり、迅速処理、連続処理を実現で
きた。According to the present invention, since the scan condition and the analysis processing condition are set before the CT scan is started, the reconstructed image can be quickly used for the next processing, that is, the analysis processing. We were able to realize rapid processing and continuous processing.
【図1】本発明のX線CT装置の動作シーケンス実施例
図である。FIG. 1 is a diagram showing an operation sequence embodiment of an X-ray CT apparatus according to the present invention.
【図2】本発明のX線CT装置の動作シネ表示処理を実
現する動作シーケンス実施例図である。FIG. 2 is an operation sequence embodiment diagram for realizing an operation cine display process of the X-ray CT apparatus of the present invention.
【図3】本発明のX線CT装置の他の動作シーケンス実
施例図である。FIG. 3 is a diagram showing another operation sequence embodiment of the X-ray CT apparatus of the present invention.
【図4】本発明のX線CT装置の他の動作シーケンス実
施例図である。FIG. 4 is a diagram showing another operation sequence embodiment of the X-ray CT apparatus of the present invention.
【図5】本発明のX線CT装置のシステム図である。FIG. 5 is a system diagram of an X-ray CT apparatus of the present invention.
1 解析処理条件入力部 2 スキャン条件入力部 3 制御・処理部 4 再構成演算部 5 解析処理部 6 表示部 7 共通バス 8 記録部 10 CT本体部 1 Analysis processing condition input unit 2 Scan condition input unit 3 Control / processing unit 4 Reconstruction calculation unit 5 Analysis processing unit 6 Display unit 7 Common bus 8 Recording unit 10 CT main unit
Claims (1)
と、X線スキャナと被検体搭載テーブルとを相互に制御
しながら得たX線CTスキャン計測の収集データから複
数スライスの再構成画像を得る再構成手段と、複数スラ
イスの再構成画像を解析する解析手段と、を有すると共
に、 上記CTスキャン計測でのデータの収集及び収集データ
に基づいて再構成手段による再構成処理と、解析手段に
よる複数スライスの再構成画像の解析処理と、を連続し
て実行できるようにシーケンス構成し、このシーケンス
動作に必要なスキャン条件及び解析処理条件を、上記C
Tスキャンの開始前に設定させることとしたX線CT装
置。1. A reconstructed image of a plurality of slices is obtained from X-ray CT scan measurement acquired data obtained by mutually controlling the X-ray scanner, the subject mounting table, and the X-ray scanner and the subject mounting table. Reconstruction means and analysis means for analyzing reconstructed images of a plurality of slices are provided, and the data collection in the CT scan measurement and the reconstruction processing by the reconstruction means based on the collected data, and the plurality of analysis means A sequence is constructed so that the slice reconstruction image analysis process can be continuously executed, and the scan condition and analysis process condition required for this sequence operation are
An X-ray CT device that was set before starting T-scan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23528494A JP3703511B2 (en) | 1994-09-29 | 1994-09-29 | X-ray CT system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23528494A JP3703511B2 (en) | 1994-09-29 | 1994-09-29 | X-ray CT system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0898834A true JPH0898834A (en) | 1996-04-16 |
| JP3703511B2 JP3703511B2 (en) | 2005-10-05 |
Family
ID=16983831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23528494A Expired - Lifetime JP3703511B2 (en) | 1994-09-29 | 1994-09-29 | X-ray CT system |
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| Country | Link |
|---|---|
| JP (1) | JP3703511B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11267119A (en) * | 1998-01-22 | 1999-10-05 | Toshiba Corp | Image diagnostic apparatus and recording medium |
| JP2000116647A (en) * | 1998-10-16 | 2000-04-25 | Hitachi Medical Corp | X-ray CT system |
| JP2001046366A (en) * | 1999-08-04 | 2001-02-20 | Hitachi Medical Corp | 3D image processing device |
| JP2001155019A (en) * | 1999-11-25 | 2001-06-08 | Olympus Optical Co Ltd | Similar image search device |
| JP2001155026A (en) * | 1999-11-26 | 2001-06-08 | Olympus Optical Co Ltd | Three-dimensional image database device and three- dimensional image database construction method |
| JP2002186612A (en) * | 2000-12-14 | 2002-07-02 | Ge Medical Systems Global Technology Co Llc | X-ray ct apparatus |
| JP2004089599A (en) * | 2002-09-04 | 2004-03-25 | Hitachi Medical Corp | Image display device |
| JP2006026287A (en) * | 2004-07-21 | 2006-02-02 | Shimadzu Corp | X-ray equipment |
| JP2010088937A (en) * | 1997-11-28 | 2010-04-22 | Toshiba Corp | Medical imaging apparatus |
-
1994
- 1994-09-29 JP JP23528494A patent/JP3703511B2/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010088937A (en) * | 1997-11-28 | 2010-04-22 | Toshiba Corp | Medical imaging apparatus |
| JPH11267119A (en) * | 1998-01-22 | 1999-10-05 | Toshiba Corp | Image diagnostic apparatus and recording medium |
| JP2000116647A (en) * | 1998-10-16 | 2000-04-25 | Hitachi Medical Corp | X-ray CT system |
| JP2001046366A (en) * | 1999-08-04 | 2001-02-20 | Hitachi Medical Corp | 3D image processing device |
| JP2001155019A (en) * | 1999-11-25 | 2001-06-08 | Olympus Optical Co Ltd | Similar image search device |
| JP2001155026A (en) * | 1999-11-26 | 2001-06-08 | Olympus Optical Co Ltd | Three-dimensional image database device and three- dimensional image database construction method |
| JP2002186612A (en) * | 2000-12-14 | 2002-07-02 | Ge Medical Systems Global Technology Co Llc | X-ray ct apparatus |
| JP2004089599A (en) * | 2002-09-04 | 2004-03-25 | Hitachi Medical Corp | Image display device |
| JP2006026287A (en) * | 2004-07-21 | 2006-02-02 | Shimadzu Corp | X-ray equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3703511B2 (en) | 2005-10-05 |
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