JPH0417841A - Marker for medical image camera - Google Patents

Abstract

PURPOSE:To facilitate the recognition of a length dimension and a direction of a tomographic image by arranging a marker which is added near an object to be inspected placed on a bed and photographed together with the object to provide indicator information to a display tomographic image, to uniformize a shape of a section at the right angle to the length thereof entirely as a whole along the length thereof using material differing in CT value from the periphery thereof. CONSTITUTION:A head rest 4 is provided to support a head of an object to be inspected placed on a bed and material thereof is composed of an acrylic resin. Graduation markers 5-5 composed of material, such as carbon or aluminum, differing in CT value from the acrylic resin are buried into the head rest 4 parallel with the length thereof at an equal interval. That is, the markers 5-5 are seen without fail at an equal interval when the head rest 4 is cut at the right angle to the length thereof. When a tomographic image of the head is taken using the head rest 4, curved graduation markers 5-5 are displayed as video, for example, together with the tomographic image 3 as the CT value is different between the tomographic image and the graduation markers 5-5.

Description

Detailed Description of the Invention [Objective of the Invention] (Industrial Field of Application) The present invention provides a method for attaching a tomographic image near a subject when taking a tomographic image using a medical imaging device such as a CT scanner or an MHI device. Concerning Maca to obtain index information of images.

(Prior Art) For example, since it is not possible to grasp the size of a tomographic image of a subject taken with a CT scanner, conventionally a scale bar 2 indicating the length dimension is displayed on the display screen as shown in FIG.
was displayed, thereby recognizing the approximate dimensions of the tomographic image 3.

(Problems to be Solved by the Invention) However, with such conventional methods, only the approximate length can be determined, and for example, the length along a curve cannot be determined.

In addition, in the conventional method, since an indicator indicating the left and right direction of the tomographic image 3 is not displayed, the operator may misjudge the direction of the tomographic image 3, causing an operational error.

The second invention was made to solve such conventional problems, and its purpose is to provide a marker for medical imaging equipment that can easily recognize the length and direction of tomographic images. It is about providing.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides a display tomography system that is attached near a subject placed on a bed and that is imaged together with the subject. A marker for a medical imaging device that gives index information to an image, using a material with a CT value different from that of the peripheral part, and configured so that the shape of the cross section at right angles to the longitudinal direction is uniform over the entire longitudinal direction. It is a characteristic.

(Function) With the configuration as described above, the same index will be displayed together with the tomographic image no matter where the marker is placed and the tomographic image of the subject is taken. Therefore, the image interpreter can easily recognize the length and orientation of the tomographic image.

(Embodiment) FIG. 1 is a configuration diagram showing an embodiment of the present invention. A headrest 4 shown in the figure supports the head of a subject placed on a bed (not shown), and is made of acrylic resin.

Further, in this headrest 4, scale markers 5 to 5 made of a material such as carbon or aluminum, which has a CT value different from that of acrylic resin, are embedded parallel to the longitudinal direction at equal intervals (for example, in order of 5). There is. In other words, when the headrest 4 is cut at right angles to the longitudinal direction, scale marks 5 to 5 can be seen at equal intervals.

When a tomographic image of the head is taken using the headrest 4 configured in this way, the headrest 4 and the scale markers 5 to
Since the CT value is different from 5, for example, as shown in FIG. 2, the curved scale markers 5 to 5 are displayed as an image together with the tomographic image 3.

In addition, since the interval distance between each scale marker 5 to 5 is known, the image interpreter can easily view the tomographic image 3.
The length dimension along the curve can be measured.

Moreover, as shown in the same structure as the headrest 4 shown in FIG. 1, the entire circumference of the tomographic image 3 is marked with scale marks 5 to 5, making it easier to measure the length dimension.

Furthermore, as shown in FIG. 4, a direction indicating marker 7 is created so that the letters rRJ will appear no matter where it is cut vertically in the longitudinal direction, and a Velcro tape 8 is attached to this direction indicating marker 7.
If it is attached to the right side of the head of the headrest 4, the letters rRJ will be displayed together with the tomographic image 3 as shown in FIG.

This allows the image interpreter to easily recognize the direction of the tomographic image 3.

In this manner, in this embodiment, the length dimensions of the tomographic image 3 can be easily calculated by the scale markers 5 to 5 embedded in the headrest 4. Furthermore, by attaching a direction marker 7 to the headrest 4, the direction of the tomographic image 3 can be easily recognized.

Although this embodiment describes an example in which a tomographic image of a subject's head is taken, the present invention is of course not limited to this, and can of course be applied to a case in which a body part is taken.

[Effects of the Invention] As explained above, the marker according to the present invention uses a material having a CT value different from that of the peripheral portion, and is configured so that the shape of the cross section at right angles to the longitudinal direction is uniform. , essential markers will be displayed on the tomographic image of the subject.

Therefore, the image interpreter can easily interpret the tomographic image using this marker as an index. As a result, it is possible to obtain the effect of being able to prevent operational mistakes.

[Brief explanation of the drawing]

Fig. 1 is an external view of a headrest in which a scale marker is embedded according to the present invention, Fig. 2 is a view showing a tomographic image of the head obtained using the headrest, and Fig. 3 is an illustration of a headrest using the headrest on the upper part of the head. 4 is an external view of the direction indicating marker according to the present invention. FIG. 5 is a diagram showing a head tomogram obtained using this direction indicating marker. FIG. 6 is a diagram showing an example of a conventional tomographic image of the head. 2... Scale bar 3... Tomographic image 4...
Headrest 5... Scale marker 7... Direction indicator marker

Claims (1)

[Scope of Claims] A marker for a medical imaging device that is attached near a subject placed on a bed and provides index information to a displayed tomographic image by photographing together with the subject, the marker comprising: 1. A marker for a medical image capturing apparatus, characterized in that the marker is made of materials having different CT values and configured so that the shape of a cross section perpendicular to the longitudinal direction is uniform over the entire longitudinal direction.