JPH06178771A - X-ray ct device - Google Patents

Abstract

PURPOSE:To provide an X-ray CT device by which the relationship between a functional image and an anatomical position can easily be brought into correspondence. CONSTITUTION:An X-ray CT device is provided with an image processing part 2 for processing prescribed image data, and a monitor 3 for displaying the processed image data as an image, and it is so constituted that the image processing part 2 simultaneously displays both the original image data and the functional image data corresponding to the original data on the monitor 3 in a prescribed display mode.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray CT apparatus,
In particular, the present invention relates to an X-ray CT apparatus that processes functional image data obtained by a three-dimensional dynamic scan, for example, a dynamic helical scan.

[0002]

2. Description of the Related Art Conventionally, an imaging method called a dynamic scan has been performed in an X-ray CT apparatus.

The dynamic scan is a technique in which a certain contrast agent is injected into the body and then the same site is scanned with time. A method of analyzing a time-concentration curve by the contrast agent using this dynamic scan is called a dynamic study. .

A dynamic study analyzes various time-concentration curves obtained by a dynamic scan to express various characteristic parameters of the time-concentration curves, such as average transit time, peak arrival time, and peak C.
The T value, the area under the curve, and the like are calculated, and the calculated functional parameters are displayed on the monitor as a functional image.

As described above, the dynamic study makes functional information such as the blood circulation dynamics of the organ correspond to the anatomical positional relationship, and is becoming an indispensable test especially for the diagnosis of cerebrovascular disorders such as cerebral hemorrhage. is there.

[0006]

In order to clinically apply a functional image, it is necessary to grasp the anatomical position of the functional image as described above. However, the functional image is an X-ray CT. Unlike the image, it is difficult to tell which part of the subject corresponds to at first glance.

Here, the anatomical position of the functional image can be made to correspond to the slice position by the normal dynamic scan in which the photographing position (slice position) is not moved, but in the case of the dynamic helical scan, Since a plurality of functional images at various slice positions are created, it is difficult to associate the obtained functional image with each slice position.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an X-ray CT apparatus capable of easily associating a functional image with an anatomical positional relationship. .

[0009]

In order to achieve the above object, the X-ray CT apparatus of the present invention has an image processing unit for processing predetermined image data and a processed image data as described in claim 1. In an X-ray CT apparatus having a monitor for displaying the image as an image, the image processing unit simultaneously displays original image data and functional image data corresponding to the original image data on the monitor in a predetermined display form. It was done like this.

Further, the X-ray CT apparatus of the present invention, as described in claim 4, comprises an image processing unit for processing predetermined image data and an X-ray monitor for displaying the processed image data as an image. In the line CT apparatus, the image processing unit simultaneously displays scano image data and functional image data on the monitor, and superimposes a slice plane of original image data corresponding to the functional image data on the scano image. It is intended to be displayed.

[0011]

According to the X-ray CT apparatus of the present invention, the original image data and the functional image data corresponding to the original image data are simultaneously displayed on the monitor in a predetermined display form.

According to a preferred embodiment of the X-ray CT apparatus of the present invention, the above-mentioned display form is MPR display or three-dimensional display.

Further, according to the X-ray CT apparatus of the present invention, the scanograph image data and the functional image data are simultaneously displayed on the monitor, and the slice plane of the original image data corresponding to the functional image data is converted into the scanno image. Overlap and display.

[0014]

Embodiments of the X-ray CT apparatus of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a block diagram showing the X-ray CT apparatus of this embodiment.

The X-ray CT apparatus of this embodiment comprises a scanner 1 for collecting X-ray projection data by helical scanning, and an image processing section 2 for reconstructing an image from the X-ray projection data collected by the scanner 1. , A monitor 3 that displays the image data from the image processing unit 2 as an image.

The scanner 1 includes a gantry and a bed (not shown), and the gantry is provided with an X-ray tube for irradiating X-rays and an X-ray detector for detecting X-rays.

The image processing unit 2 reconstructs an image,
Functional image data as described in the prior art can be created using a plurality of X-ray CT image data obtained at predetermined time intervals at the same slice position, and X-ray CT image data and Monitor the functional image data corresponding to this
It is designed to be simultaneously displayed in a predetermined display form on the top.

In the following description, the X-ray CT image data will be referred to as original image data.

The above-mentioned display form is MPR (Multiplanar R
Econstruction, cross-section conversion) display or three-dimensional display can be arbitrarily selected.

The X-ray CT apparatus of this embodiment further comprises a data storage unit 4 for storing the original image data and the functional image data, and a memory 5 for temporarily storing these data. An input unit 6 for inputting shooting conditions and the like and a control unit 7 for controlling these units are provided.

The input unit 6 can specify various display parameters.

The memory 5 functions as a work area of the image processing section 2, and the data to be used can be temporarily moved from the data storage section 4.

Each piece of image data has bed position information, data type information indicating original image data or functional image data as auxiliary information, and the original image data and the functional image data corresponding thereto are It is stored in the same directory of the data storage unit 4.

Next, the operation of the X-ray CT apparatus of this embodiment will be described.

FIG. 2 is a flow chart for explaining a procedure for simultaneously displaying original image data and functional image data corresponding to the original image data on the monitor using the X-ray CT apparatus of this embodiment.

First, at least one of the original image data and the functional image data corresponding thereto is designated by the input section 6 as an image to be displayed.

The image is designated by, for example, inputting an image number, turning the image, or the like, and either the original image data or the functional image data may be designated, or both may be designated.

When both the original image data and the corresponding functional image data are designated, both designated data are read from the data storage unit 4 and written in the memory 5.

When only the original image data is specified, the corresponding functional image data, that is, the functional image data created at the same bed position as the specified original image data is searched for, and only the functional image data is searched. When designated, the corresponding original image data, that is, the original image data created at the same bed position as the designated functional image data is searched, and then both designated or searched data are stored in the data storage unit 4. Read from and write to memory 5.

If necessary, the original image data and the functional image data are stored in the memory 5 in slice order.
It is better to store it in.

Next, the display form is selected and designated from the MPR display and the three-dimensional display.

When the MPR display is specified, the line ROI
If the 3D display is specified by inputting, input the cross section position, and specify the display cross section and the display direction.

Next, the display data of the original image data and the corresponding functional image data is created by the image processing section 2 based on the designated contents, and the created display data is displayed on the monitor 3.

FIG. 3 (a) shows the screen of the monitor 3 when the MPR display is selected. The original image data 12 is on the left side and the functional image data 13 is on the right side in three sections. Indicated by.

A sectional line 11 in the figure is a line ROI indicating the sectional position of another image.

FIG. 3B shows the screen of the monitor 3 when the three-dimensional display is selected. Similarly, the original image data 14 is shown on the left side and the functional image data 15 is shown on the right side. Has been done.

FIG. 4 is a flowchart showing a procedure for changing the cross-sectional positions of the original image data and the functional image data once displayed on the monitor 3.

To change the cross-sectional position of the original image data and the functional image data once displayed on the monitor 3, as shown in the figure, when MPR display is designated, the displayed line ROI is The input unit 6 is used to move by, for example, inputting a numerical value, operating a mouse or operating a trackball.

Next, the image processing unit 2 creates the display data in the cross section designated by the line ROI after the movement.

Then, the created display data is displayed again on the monitor 3.

Here, for example, when the line ROI of the original image is moved, the line ROI of the functional image is also automatically moved, and the original image data and the functional image data are converted based on the line ROI after the movement. It is good to create display data.

On the other hand, when the three-dimensional display is designated, the display section and the display direction are first changed.

Next, display data is created with the changed display section and display direction.

Next, the created display data is displayed again on the monitor 3.

Similarly, when the display section and the display direction of the original image are changed, the display section and the display direction of the functional image are automatically changed.
It is preferable to create the display data of the original image data and the functional image data based on the changed display section and display direction.

As described above, the X-ray CT apparatus of this embodiment is
Since the original image data and the functional image data corresponding thereto are simultaneously displayed on the monitor in the form of MPR display or three-dimensional display, the functional image data and its anatomical position can be easily associated with each other. be able to.

In particular, in the case of the dynamic helical scan, a plurality of functional images can be obtained at any bed position and at any angle within the scan range. These functional images together with the corresponding original images are obtained. Since it is displayed on the monitor, the anatomical position of the functional image can be easily grasped.

Further, with the above configuration, the anatomical position of the functional image being displayed can be known in real time.

Further, in the case of three-dimensional display, the display section and the display direction can be set while observing the original image, and then the functional image corresponding to the original image can be viewed under the same setting conditions, and it is not appropriate. By setting the threshold value, a three-dimensional image of a functional image of only a desired area can be viewed.

In the above-described embodiment, in the case of three-dimensional display, the original image and the functional image are arranged side by side as shown in FIG. 3B, but as shown in FIG. Surface tissue such as skeleton 21 in the original image and soft tissue such as brain 22 in the functional image
And may be combined and the combined image 23 may be displayed.

In the above embodiment, the original image data and the corresponding functional image data are simultaneously displayed from the beginning. However, only one of the images is displayed at the beginning, and if necessary, for example, a predetermined image is displayed. The other corresponding image may be displayed by operating the key of.

Further, in the above-described embodiment, the original image and the functional image are displayed on each of three planes at the time of MPR display, but which plane is displayed is arbitrary.

For example, even if the original image is displayed as a sagittal image, a functional image is created in the cross section indicated by the line ROI displayed in the sagittal image, and the created functional image is displayed as an axial image. Good.

In the above-described embodiment, the anatomical position of the functional image data is displayed by simultaneously displaying the original image data and the corresponding functional image data on the monitor in the form of MPR display or three-dimensional display. Although it is configured so that the functional image data 31 can be easily grasped, the functional image data 31 is displayed by superimposing the slice section 33 on the scanogram 32 simultaneously displayed with the functional image data 31, as shown in FIG. The anatomical position of the may be easily grasped.

In this case, at first, only the scano image is displayed, a line ROI is set on this scano image, and the line ROI is set.
You may make it display the functional image in the cross section represented by in real time.

[0057]

As described above, the X-ray CT apparatus of the present invention is an X-ray CT provided with an image processing unit for processing predetermined image data and a monitor for displaying the processed image data as an image. In the device, the image processing unit simultaneously displays the original image data and the functional image data corresponding to the original image data on the monitor in a predetermined display form. The positional relationship can be easily associated.

Further, the X-ray CT apparatus of the present invention is an X-ray CT apparatus comprising an image processing unit for processing predetermined image data and a monitor for displaying the processed image data as an image. The section simultaneously displays the scanogram image data and the functional image data on the monitor, and displays the slice plane of the original image data corresponding to the functional image data so as to be superimposed on the scanno image. The positional image and the anatomical positional relationship can be easily associated with each other.

[Brief description of drawings]

FIG. 1 is a block diagram of an X-ray CT apparatus according to this embodiment.

FIG. 2 is a flowchart showing the operation of the X-ray CT apparatus according to this embodiment.

FIG. 3 (a) shows an MP image obtained by using the X-ray CT apparatus of this embodiment.
The figure which shows the original image and functional image which were displayed on the monitor screen in R display mode, and (b) is the figure which shows the original image and functional image similarly displayed in a three-dimensional display mode.

FIG. 4 is a flowchart showing the operation of the X-ray CT apparatus according to this embodiment.

FIG. 5 is a diagram in which an original image and a functional image are combined.

FIG. 6 is a diagram in which slice planes of original image data corresponding to functional image data are superimposed and displayed on a scano image.

[Explanation of symbols]

 1 Scanner 2 Image Processing Section 3 Monitor 4 Data Storage Section 5 Memory 6 Input Section 7 Control Section

Claims (4)

[Claims] 1. An X-ray CT apparatus comprising: an image processing unit for processing predetermined image data; and a monitor for displaying the processed image data as an image. An X-ray CT apparatus, wherein functional image data corresponding to image data is simultaneously displayed on the monitor in a predetermined display form. 2. The X-ray CT apparatus according to claim 1, wherein the display form is an MPR display. 3. The X-ray CT apparatus according to claim 1, wherein the display form is a three-dimensional display. 4. An X-ray CT apparatus comprising: an image processing unit for processing predetermined image data; and a monitor for displaying the processed image data as an image, wherein the image processing unit comprises scano image data and functional image data. An X-ray CT apparatus, wherein image data is simultaneously displayed on the monitor and a slice plane of original image data corresponding to the functional image data is displayed so as to be superimposed on the scanogram.