JPH0241139A - Profile drawing apparatus - Google Patents

Abstract

PURPOSE:To obtain profile function improved in operability and contribute to diagnosis by adding the setting of a curve thereto by providing an input means for inputting the coordinates of each point for determining a plurality of points constituting a curve to be observed or tracing said curve. CONSTITUTION:Points for forming a curve collecting profile data are set by an input device 11. A curve setting part 12 determines the curve connecting respective points on the basis of the set points according to stored algorithm. A data delivery part 14 delivers the image data on the curve set by the curve setting part 12 from the image data stored in an image data buffer 13 to store the same in a temporary buffer 15. A graph preparing part 15 forms the line graph of the image data on the stored curve to display the same on a display device 17. As mentioned above, by providing a curve profile function, a wide range of the data on the curve can be observed by one setting and profile function more improved in operability is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a profile drawing device that displays image data on a specified line in a line graph and observes changes in CT values depending on position.

(Prior Art) Current profile functions in medical imaging devices such as CT devices display data on a line cursor or on a straight line connecting two points in a line graph.

(Problem to be solved by the invention) However, the function of displaying straight line data connecting two points in a line graph is not enough, for example, when displaying data along a curved part such as the back vertebrae. If you do,
It must be displayed by connecting short straight lines as shown in Figure 2. In the figure, (a) is a line diagram showing the position where data is taken to draw a line graph of the subject, (b) is a line graph, which is displayed overlaid on (a). The figure shows the CT value on the vertical axis and the same coordinates as in the figure (A) on the horizontal axis. In the figure, 1 is a line indicating the position where the profile of the subject 2 is taken, and short line segments having an angle of 45° or less with respect to the horizontal line are connected. 3 is a circumferential reflector, 4 is a solid reflector, and 5 is a hollow reflector. 6 is reflector 3
7 is a line graph of the data of the reflector 4, and 8 is a line graph of the reflector 5.

If you are trying to display data along a curved part such as the back vertebrae, you have to connect short straight lines and display it using only the function shown above that displays data on a straight line as a line graph. , data that you want to see continuously will be displayed discontinuously, and you will have to set it many times, making it very inconvenient to use.

If the angle of the set straight line from the horizontal line is 45 degrees or less, the graph will be viewed from the horizontal direction, and if the angle from the horizontal line exceeds 45 degrees, the graph will be viewed from the vertical direction.

Therefore, depending on the angle of the set straight line, the graph may be viewed horizontally or vertically, making it extremely difficult to view when displaying data along a circular line. This state will be explained with reference to the drawings.

FIG. 3 is a diagram of settings according to the current profile function. In the figure, (a) shows the straight line setting, and (b) shows the graph. In the figure, set line segments A and D are line segments exceeding 45°, and set line segments B and C are line segments within 45°. Therefore,
(b) Graph A' obtained from Figure 8 and graph D' obtained from D have the horizontal axis as the CT value and the vertical axis as the coordinate axis, and graph B' obtained from 19 B and graph C obtained from C. ' is written with the CT value on the vertical axis and the coordinates on the horizontal axis. When the angle of the straight line set in this way from the horizontal reaches 45 degrees, the graph can be viewed from the horizontal direction or the graph can be viewed from the vertical direction.

The present invention has been made in view of the above points, and its purpose is to add curve settings to the profile function, improve operability, and
An object of the present invention is to realize a profile drawing device having a profile function that is more useful for diagnosis.

(Means for Solving the Problems) The present invention solves the above-mentioned problems in a profile drawing device that displays image data on a specified line in a line graph and observes changes in CT value depending on position. , an input means for determining a plurality of points constituting a curve to be observed or inputting the coordinates of each point to trace the curve; a curve determining means for determining a curve at a position from which data is to be taken based on the input coordinates; a data cutting means for cutting out image data according to a curve stored in an image data storage means and determined by the curve determining means; a storage means for temporarily storing the cut out image data; and a data cutting means for temporarily storing the cut out image data; The present invention is characterized by comprising a graph creation means for creating a line graph, and an image display means for making it possible to display the graph created by the graph creation means superimposed on the original image.

(Operation) Input the coordinates of the point along the curve where the necessary image should be displayed,
A curve connecting each input point is determined, image data on the curve is cut out, stored in a storage means, a line graph is created, and a line graph is displayed on the image display means.

(Example) Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention.

In the figure, reference numeral 11 is an input device for inputting multiple points such as a tracing method for creating a profile using a trackball or keyboard, a crosshair cursor, etc., and a curve setting section 12 is for inputting multiple points such as a tracing method for creating a profile using a trackball or keyboard, etc. An appropriate curve is determined and connected using the stored curve formula by applying a cloud-shaped ruler to the points, and setting a curve for collecting data to be displayed. 1
3 is an image data buffer that stores image data from medical images from a CT device, etc. It is. The data cutting section 14 extracts data on the curve determined by the curve setting section 12 from the image data buffer 13 and stores the data values in the temporary buffer 15. When cutting out, you can select either a method of cutting out data on a curve when viewed from the horizontal or vertical direction, or a method of cutting out data on a curve when the curve is stretched from both ends to make a straight line. Can be adopted. 15 is temporary
A graph creation section that reads data stored in the buffer and creates a line graph, and the created graph is displayed on the display device 1.
7 is displayed.

Next, the operation of the apparatus of the embodiment configured as described above will be explained. The input device 11 is used to set points at which to create a curve for collecting profile data. Curve setting section 1
2 determines a curve connecting each point based on the input of points set by the input device 11 using a stored algorithm. The data cutting section 14 cuts out the image data on the curve set by the song a setting section 12 from the image data stored in the image data buffer 13, and stores it in the temporary buffer? 15.

The graph creation unit 16 creates a line graph of the image data on the curve stored in the temporary buffer 15, and the data of the created line graph is displayed on the display device 17.

Curve setting methods include a method of connecting points set with the input device 11 using a curve interpolation method, and a method of creating a curve in the curve setting section 12 from data obtained by tracing continuous movements using a trackball or mouse in the input device 11. ,
You can choose one. Also, for data extraction,
In addition to the method of displaying the data on the curve shown in Fig. 4 as a line graph from the horizontal or vertical direction, as shown in Fig. 5, (a) Ps, P+, P2, P3 in Fig.
The data on the curve connecting each point of Pε is extended in a straight line from each point of Ps''-Pε as shown in (b) figure, and the interval between each point is set as Ps Pr , Pt-Pz in (a) figure. ,Pz
There is a method of displaying the distance Ps equal to the actual distance Ps-Pε. In FIG. 4, the set curves are connected by curved lines that are more gradual than in the case where they are connected by line segments as shown in FIG. Also, in the case of Figure 3, the line graph is discontinuous and the display direction is different, making it difficult to grasp the overall situation, but in Figure 5, the line graph is composed of data on a gentle curve. This makes it easier to understand the situation.

Note that the present invention is not limited to the above embodiments. The settings in the music IJ setting section may be made using a polygonal line instead of a gentle curve, and the data obtained when the polygonal line is stretched is cut out and displayed. The configuration and operation of the device in this case are the same.

By providing the curve profile function in this way,
With a single setting, data on a wide range of curves can be viewed, and even data along a circular pattern can be seen at a glance, providing profile functions that are easier to use and more useful for diagnosis. be able to.

For example, with the spread of nuclear magnetic resonance imaging (MRI), it is becoming increasingly common to diagnose the back vertebrae using beautiful sagittal images. Displacement of the dorsal spinal cord and early syringomyelia can be diagnosed more clearly. In addition, tumors have specificity in their shape, structure, tissue content, etc., and by using the device of this example, the tumor part, normal part, vascular tissue,
The films can be seen connected by a series of curved lines.

As an application, curved reformation is performed to stretch and view curved parts, which takes time to process, but by using the curve profile function to determine the target area and then starting it, efficient diagnosis becomes possible. .

(Effects of the Invention) As described above in detail, according to the present invention, it is possible to add a curve setting to the profile function, thereby realizing a profile function that is easy to operate and useful for diagnosis, and has great practical effects.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an embodiment of the present invention, Fig. 2 is a diagram of a conventional profile function, Fig. 3 is a diagram of curve expression by the conventional profile function, and Fig. 4 is a diagram of the profile function of the present invention. , FIG. 5 is a diagram of a curve representation by the profile function according to the present invention. 11... Input device 12... Curve setting section 13.
...Image data buffer 14...Data cutting section 5...Temporary buffer 7 6...Graph creation section 7...Display device

Claims (1)

[Claims] In a profile drawing device that displays image data on a specified line in a line graph and observes changes in CT value depending on position, determines multiple points that make up the curve to be observed or coordinates of each point to trace the curve. an input means for inputting a curve, a curve determining means for determining a curve at a position from which data is taken based on the input coordinates, and data stored in an image data storage means for cutting out image data according to the curve determined by the curve determining means. A cutting means;
A storage means for temporarily storing cut out image data, a graph creation means for creating a line graph based on the data stored in the storage means, and a graph created by the graph creation means superimposed on the original image. 1. A profile drawing device comprising an image display means that makes it possible to perform the following operations.