JP4659933B2 - Medical imaging device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a medical imaging apparatus such as an X-ray computer tomography apparatus (X-ray CT), a magnetic resonance diagnostic apparatus, a nuclear medicine diagnostic apparatus, and an ultrasonic diagnostic apparatus.
[0002]
[Prior art]
Prior imaging is required when imaging a subject with a medical imaging apparatus. With this advance preparation, the operator sets signal acquisition conditions. The signal acquisition condition includes several tens of parameters. The number of parameters has been increasing with the recent trend toward multi-functionality.
[0003]
For X-ray CT, signal acquisition conditions (scan conditions) include scan type (single slice scan / helical scan (volume scan)), slice thickness, slice interval, volume size, gantry tilt angle, tube voltage, tube current. , Parameters such as the shooting area size and scan speed are included.
[0004]
It is too inefficient and impractical to manually set several such signal acquisition parameters, which may be several dozens, one by one for each shooting. Therefore, the preset function is used. This preset function stores signal collection parameter sets recommended by manufacturers and signal collection parameter sets that have been used in the past, and reproduces them quickly by button operation. That is, signals are collected according to the signal collection parameter set selected by the operator.
[0005]
However, the problem with this preset function is that it is not simply a matter of increasing the number of preset buttons. The main reason for this is that it is easy to increase to 100 buttons, but it is very difficult to understand what signal acquisition conditions are registered in which preset button, and on the contrary, its convenience. It is possible that the property is lowered.
[0006]
In recent years, with the increasing functionality of signal collection, the functionality of image generation and image display has also increased. For this reason, the number of parameters relating to image generation and image display that must be specified or can be specified by the operator has become enormous.
[0007]
Therefore, even if the setting of the signal acquisition parameter is simplified by the preset function, it is the current situation that the effort of setting the image generation parameter and the image display parameter is remarkably pulled. In order to reduce the effort required for preparation, it is necessary to consider reducing not only the signal acquisition parameters but also the setting of image generation parameters and image display parameters.
[0008]
However, although the number of signal acquisition parameters alone is enormous, it is impossible to correspond to a preset button including an image generation parameter and an image display parameter. This is because it is impossible to know at all the preset buttons which parameter sets relating to signal collection, image generation, and image display are registered.
[0009]
[Problems to be solved by the invention]
An object of the present invention is to allow an operator from signal collection to image generation and image display in a medical imaging apparatus such as an X-ray computed tomography apparatus (X-ray CT), a magnetic resonance diagnostic apparatus, and a nuclear medicine diagnostic apparatus. The purpose is to make it possible to easily and easily set a large number of necessary parameters.
[0010]
[Means for Solving the Problems]
The present invention is a means for storing a plurality of reference images associated with a plurality of parameters related to signal collection, image generation, and image display, and a means for displaying a list of the plurality of stored reference images, Signals are collected from the subject in accordance with means for the operator to selectively specify any one of the displayed reference images and a parameter associated with the specified reference image. Means for generating a medical image from the collected signal, displaying the generated medical image, means for processing a medical image actually captured into the reference image, and actually capturing the processed reference image signal acquisition using to obtain medical images, you and means for storing a plurality of associated parameters relating to image generation and image display.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Editing Hereinafter, the present invention will be described by way of a preferred embodiment with reference to the drawings.
[0013]
FIG. 1 is a block diagram showing a hardware configuration of a medical image photographing apparatus according to an embodiment of the present invention.
[0014]
As shown in the figure, the medical image photographing apparatus of the present embodiment includes a central processing unit (CPU) 1, a display interface 2, a display 3, a memory 4, a disk interface 5, a disk unit 6, an image processor 7, and a data interface 8. , Mouse 9, and data collection unit 100.
[0015]
When the present invention is regarded as a parameter setting support device for a medical imaging apparatus, the parameter setting support device, except for the data collection unit 100, has a central processing unit (CPU) 1, a display interface 2, and a display 3. , A memory 4, a disk interface 5, a disk unit 6, an image processor 7, and a data interface 8. However, the present invention will be described here as a medical image photographing apparatus.
[0016]
This medical imaging apparatus is any one of an X-ray computer tomography apparatus (X-ray CT), a magnetic resonance diagnostic apparatus (MRI), a nuclear medicine diagnostic apparatus (gamma camera), and an ultrasonic diagnostic apparatus. Each medical imaging apparatus has a function (signal collection function) for collecting signals that are the basis of an image from a subject, a function for generating a medical image from the collected signals (image generation function), and a generated medical image. A function (image display function) for performing processing such as zooming and coloring is basically provided.
[0017]
Here, for convenience of explanation, it is assumed that the medical image photographing apparatus is an X-ray computer tomography apparatus. Under this assumption, the data collection unit 100 corresponds to a scanner equipped with an X-ray tube, an X-ray detector, a rotation mechanism, a DAS (data collection system), and the like.
[0018]
When projection data of the subject is acquired by scanning by the scanner 100, the projection data is sent to the image processor 7 via the data interface 8, where tomographic image data is reconstructed. This image processor 7 will be described later from a function of reconstructing tomographic image data, a function of constructing three-dimensional image data, maximum value projection (MIP) image data, and the like, tomographic image data, three-dimensional image data, and the like. And a function of generating reference image data. The tomographic image data obtained here is sent to the disk unit 6 via the disk interface 5 and stored therein.
[0019]
The reference image data generated by the image processor 7 is associated with a plurality of parameter data relating to signal processing, image generation and image display, and title data, as will be described later, and is connected to the disk unit 6 via the disk interface 5. Sent to and memorized.
[0020]
The reference image data and title data stored in the disc unit 6 are read from the disc unit 6 and displayed as a list on the display 3 via the display interface 2 during preparation work. A mouse 9 or a pointing device equivalent to the mouse 9 is provided in order to selectively designate what is desired by the operator from the list-displayed reference images. A plurality of parameters relating to signal acquisition, image generation, and image display associated with a reference image designated using the mouse 9 are loaded from the data interface 8 to the CPU 1. The CPU 1 sets the signal acquisition conditions of the scanner 100 to the loaded signal processing parameters, sets the image generation conditions of the image processor 7 to the loaded image generation parameters, and sets the image display conditions of the display interface 2 to the loaded image display parameters. Set.
[0021]
As described above, the projection data collecting operation by the scanner 100 involves a plurality of parameters. Similarly, a plurality of parameters are involved in both an image generation operation for generating a tomographic image from collected signals and an image display operation for displaying a reconstructed tomographic image. Examples of signal acquisition parameters are: imaging region (whole body, head, chest, lung field, lower limb, etc.), scan type (single slice scan / multi slice scan / helical scan (volume scan)), slice thickness, slice interval, volume Size, gantry tilt angle, tube voltage, tube current, imaging area size, scan speed (rotation speed of the X-ray tube and detector), amount of movement of the bed that moves while the X-ray tube makes one rotation, and amount of movement of the bed is there. Examples of the image generation parameters are a reconstruction method (2D / 3D), a reconstruction area size, a reconstruction matrix size, and a threshold value for extracting a region of interest. Examples of image display parameters are window level, window width, display magnification, and multiplanar (sagittal / coronal / oblique).
[0022]
In order to complete a series of inspection sequences from signal acquisition through image generation to final image display, the above-described multiple signal acquisition parameters, multiple image generation parameters, and multiple image display parameters are set, respectively. Is required. Here, the set signal acquisition parameters, the set image generation parameters, and the set image display parameters are collectively referred to as a plan. In other words, if a plan including a plurality of signal acquisition parameters, a plurality of image generation parameters, and a plurality of image display parameters is registered in advance, the above-described series of sequences can be easily executed by selecting the plan. Can do.
[0023]
In the present embodiment, a plurality of plans are registered in the disk unit 6, and an operator selectively designates a desired plan from the plurality of registered plans using the mouse 9. Not only the signal acquisition parameters but also a plurality of image generation parameters and a plurality of image display parameters that could not be conventionally achieved can be set immediately.
[0024]
Furthermore, in order to selectively specify the plan desired by the operator, the operator does not know the relationship between each plan, that is, a plurality of parameters included in the plan, and the finally obtained medical image. must not. Given that each plan has dozens or even hundreds of parameters related to signal acquisition, image generation and image display, it is not effective to present these parameters to the operator in full text.
[0025]
In this embodiment, the relationship between each plan and the finally obtained medical image is provided by a reference image 200 and a title 300 as shown in FIG.
[0026]
The reference image 200 is a reduced image of a medical image in which a plurality of parameters relating to signal collection, image generation, and image display constituting a plan corresponding thereto are shared in whole or in part, or a schematic pictorial diagram of the medical image It is. That is, the reference image is provided as information suggesting a medical image in which a plurality of parameters related to signal collection, image generation, and image display associated therewith are wholly or partially in common. Therefore, the operator can infer a medical image finally obtained from the reference image by a plurality of parameters related to signal collection, image generation, and image display associated therewith.
[0027]
The title 300 also includes at least some characteristic parameters that may be useful for selecting a plan among a plurality of parameters related to signal acquisition, image generation, and image display constituting a corresponding plan, such as a region, a scan type, and the like. Represents a reconstruction method.
[0028]
The display of the plan list, the selection of the plan, the registration of the plan, and the registration of the reference image are realized or supported by program codes 11, 12, 13, and 14 that can be executed by the CPU 1, respectively, as shown in FIG. However, the present invention is not limited to this, and may be realized by hardware.
[0029]
FIG. 4 is a flowchart showing the basic operation of the medical image photographing apparatus configured as described above. First, primary preparation work is performed (step S1). This primary preparation work is related to the registration of plans and reference images. FIG. 5 shows a flowchart of this primary preparation operation. In step S10, the user selects either plan registration or reference image registration.
(Reference image registration)
FIG. 6 shows an example of the reference image registration screen. This reference image registration is executed by the reference image registration program code 14 of the CPU 1. First, in step S30, an original image 31 that is a reference image creation source is selected from a medical image installed in advance and a past medical image actually taken. In step S31, the selected original image 31 is converted into a reference image 32 by the image processor 7. For example, the reference image 32 is generated as a reduced image of the original image 31 or a schematic picture obtained by performing graphic processing on the original image 31. In step S 32, the reference image 32 is registered in the reference image candidate list 30 and stored in the disk unit 6. The reference image is not limited to a still image and may be a moving image.
(Plan registration)
When plan registration is selected in step S10 of FIG. 5, a plan editing operation is executed (step S20). In editing this plan, the operator can specify multiple parameters for signal acquisition, image generation, and image display one by one, or multiple parameters for signal collection, image generation, and image display used in the past can be modified as is. Is done.
[0030]
Next, in step S21, a reference image is associated with the edited plan. This process is performed when the operator selects an arbitrary reference image 21 from the reference image candidate list 30 as shown in FIG. At this time, the title 20 is also input automatically or manually.
[0031]
In step S22, the edited plan is stored in the disk unit 6. At this time, the selected reference image 21 and the input title 20 are associated with the plan.
[0032]
After this primary preparation work S1, a secondary preparation work S2 is performed. This secondary preparatory work S2 is a work that is performed immediately before the actual shooting is started, and is a work for selectively designating a desired plan from the plans registered in the primary preparatory work S1.
[0033]
In this primary preparation work, first, as shown in FIG. 2, the plan list is displayed on the display 3 together with the reference image 200 and the title 300. The operator refers to the reference image 200 and the title 300 and selectively designates a desired plan from the plan list by double-clicking the display area of the reference image 200 or the title 300 with a mouse button. .
[0034]
When a plan is selected, a plurality of parameters related to signal collection, image generation, and image display associated with the reference image 200 are loaded from the disk unit 6 to the CPU 1.
[0035]
Then, a signal collection operation is executed by the scanner 100 according to the loaded signal processing parameters (step S3), and a medical image (tomographic image) is generated (reconstructed) by the image processor 7 according to the loaded image generation parameters (step S4). ), And a medical image is displayed on the display 3 in accordance with the loaded image display parameters.
[0036]
As described above, according to the present embodiment, first, a plurality of reference images are displayed in a list. Parameters related to signal collection, image generation, and image display are associated with each of the plurality of reference images. When the operator selects a desired reference image from the list, a signal is collected, an image is generated, and the image is displayed according to the parameters associated with the selected reference image.
[0037]
Since this reference image suggests a medical image in which a plurality of parameters are wholly or partially in common, the operator selects a medical image that will ultimately be obtained according to the parameters associated with the reference image. With the understanding, you can selectively specify the desired plan.
[0038]
Accordingly, the only task imposed on the operator is to select a reference image that is visually close to the desired medical image. Fine signal acquisition parameters, image generation parameters, and image display parameters that other operators do not need to know are automatically set on the apparatus side.
[0039]
The present invention is not limited to the embodiments described above, and can be implemented with various modifications. For example, in the above description, the reference image and the title are displayed as a pair. However, only the reference image list may be displayed without displaying the title list, and vice versa. Only the title list may be displayed without displaying the reference image list.
[0040]
【The invention's effect】
According to the present invention, the following effects are produced. First, a plurality of reference images are displayed in a list. Parameters related to signal collection, image generation, and image display are associated with each of the plurality of reference images. When the operator selects a desired reference image from the list, a signal is collected, an image is generated, and the image is displayed according to the parameters associated with the selected reference image. The only task imposed on the operator is to select a reference image that is visually close to the desired medical image. Fine signal acquisition parameters, image generation parameters, and image display parameters that other operators do not need to know are automatically set on the apparatus side.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a medical image photographing apparatus according to an embodiment of the present invention.
FIG. 2 is a diagram showing an example of a plan list displayed on the display of FIG.
FIG. 3 is a diagram showing types of program codes executed by the CPU of FIG. 1;
FIG. 4 is a flowchart showing a series of operations from preparation work to image display in the present embodiment.
FIG. 5 is a flowchart showing a flow of processing of primary preparation work in FIG. 4;
6 is a diagram showing an example of a reference image registration screen in FIG.
7 is a diagram showing an example of a plan registration screen in FIG. 5. FIG.
[Explanation of symbols]
1 ... Central processing unit (CPU),
2. Display interface,
3. Display,
4 ... Memory,
5 ... Disk interface,
6 ... disk unit,
7 ... Image processor,
8 ... Data interface,
9 ... Mouse,
100: Data collection unit.

Claims (6)

Means for storing a plurality of reference images each associated with a plurality of parameters related to signal collection, image generation and image display;
Means for displaying the plurality of stored reference images in a list;
Means for an operator to selectively designate any one of the displayed reference images;
Means for collecting a signal from a subject in accordance with a parameter associated with the designated reference image, generating a medical image from the collected signal, and displaying the generated medical image;
Means for processing a medical image actually taken into the reference image;
Medical image, characterized by comprising means for storing the processed reference image, the actual captured signals collected using in order to obtain medical images, in association with a plurality of parameters relating to image generation and image display Shooting device.   The medical image photographing apparatus according to claim 1, wherein the reference image has a data amount smaller than that of the medical image.   The medical image photographing apparatus according to claim 1, wherein the reference image is displayed together with a title including a part of a plurality of parameters associated with the reference image. Means for storing a plurality of reference images each associated with a plan including a plurality of parameters related to signal acquisition, image generation, and image display;
Means for displaying the plurality of stored reference images in a list;
Means for an operator to selectively designate any one of the displayed reference images;
Means for collecting signals from the subject according to parameters included in the plan associated with the designated reference image, generating a medical image from the collected signal, and displaying the generated medical image;
Means for processing a medical image actually taken into the reference image;
Medical image, characterized by comprising means for storing the processed reference image, the actual captured signals collected using in order to obtain medical images, in association with a plurality of parameters relating to image generation and image display Shooting device. Means for storing a signal acquisition, multiple reference images a plurality of parameters related to image generation and image display that is associated with,
Means for displaying the plurality of stored reference images in a list;
Means for an operator to selectively designate any one of the displayed reference images;
Means for outputting a parameter associated with the designated reference image to a medical image photographing apparatus;
Means for processing a medical image actually taken into the reference image;
Medical image, characterized by comprising means for storing the processed reference image, the actual captured signals collected using in order to obtain medical images, in association with a plurality of parameters relating to image generation and image display A parameter setting support device for a photographing device. Means associated with a plan including a plurality of parameters relating to signal collection, image generation and image display, and storing a plurality of reference images representing the associated plan;
Means for displaying the plurality of stored reference images in a list;
Means for an operator to selectively designate any one of the displayed reference images;
Means for outputting a plan parameter associated with the designated reference image to a medical image photographing apparatus;
Means for processing a medical image actually taken into the reference image;
Medical image, characterized by comprising means for storing the processed reference image, the actual captured signals collected using in order to obtain medical images, in association with a plurality of parameters relating to image generation and image display A parameter setting support device for a photographing device.

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