JP2665238B2 - Simple 3D image creation method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention provides a full-sized three-dimensional image of a living body or the like when performing various diagnoses based on CT images or MRI images (hereinafter referred to as CT images). The present invention relates to a method for creating a simple three-dimensional image that can obtain an image.

[Conventional technology]

In recent years, CT scans are often used as a method of examining the inside of a living body, and doctors look at CT images one by one and assemble the pictures in their heads three-dimensionally, while treating the area requiring treatment and the surrounding organs. Observing the situation and making a diagnosis.

However, the observation and diagnosis require some skill and experience, and it is hard to say that grasping a three-dimensional situation is necessarily objective. Therefore, in order to more objectively grasp the situation at the examination stage, attempts have been made to create a three-dimensional image of a living body from a CT image using computer graphics technology and apply it to clinical application.

[Problems to be solved by the invention]

However, those utilizing computer graphics technology are bulky and expensive, and are not readily available to clinicians. At the present time, the image obtained by reading a CT image by a doctor while inputting it to a computer is merely represented on a plane, the work is complicated, and it is difficult to use it in an actual medical practice.

An object of the present invention is to provide a simple stereoscopic image creating method that can easily create a three-dimensional stereoscopic image by a simple operation based on a CT image without using an expensive device.

[Means for solving the problem]

Therefore, the simple stereoscopic image creation method of the present invention uses a plurality of CTs.
The imaging film is sequentially irradiated with illumination light to project a CT image on a plurality of light-transmitting sheets by an optical system, and the projected images are sequentially traced on each sheet, and the plurality of sheets on which the trace images are drawn are subjected to CT. It is characterized in that three-dimensional trace images are obtained by laminating them on a transparent container at predetermined intervals in image order and irradiating with illumination light.

[Action]

According to the present invention, first, CT images obtained by performing CT scanning of an object at predetermined intervals are projected one by one on a highly transparent sheet of a desired size by an optical system. And the outline of the part of the living body that you need is traced by color-coding the sheet,
This is performed for all the CT images one by one. Next, the sheets whose outlines have been traced are stacked by inserting them into the shelves of the transparent containers at the positions where the CT scan was performed. Then, a light is applied to the transparent container, and the outline drawn on each sheet is three-dimensionally raised in space, whereby a three-dimensional stereoscopic image can be created.

〔Example〕

 Hereinafter, embodiments will be described with reference to the drawings.

FIGS. 1 (a), 1 (b), 3 (c) and 2 are views for explaining the simple stereoscopic image forming method of the present invention. In the figure, 1 is a CT imaging film, 2 is an overhead projector,
3 is a lens, 4 and 5 are mirrors, 6 is a projection table, 10 is a transparent sheet, 11 is a contour line, 20 is a glass plate, 30 is an image box, 31 is a shelf, and 32 is a filter.

For example, in the medical field, a target organ is subjected to CT scanning at required intervals at 5 mm intervals (40 times for a 20 cm one), and as shown in FIG. On the overhead projector 2
The image is projected on the projection table 6 at the actual size through the lens 3 and the mirrors 4 and 5. The angles of the mirrors 4 and 5 can be freely adjusted by a universal joint (not shown). A transparent sheet 10 having a high degree of transparency is set on a white metal projection table 6 at a predetermined position, and a contour of a necessary organ is colored and traced. In this case, a pole piece, a magnet, or the like may be affixed to the periphery of the sheet, and the sheet may be fixed at a predetermined position using this. Then, for example, the arteries are traced with red or vein magic ink or the like while checking each organ manually. FIG. 1 (b) shows a traced transparent sheet 10, which is applied to all the CT images one by one.

Next, a transparent sheet whose outline is traced
10 is inserted into the shelf 31 of the transparent image box 30 as shown in FIG. The image box 30 is made of an acrylic frame,
At this time, the shelves 31 with high transparency are laminated at intervals of 5 mm, which is the same interval as the CT scan. Then, after all the transparent sheets 10 have been inserted into the shelf 31 of the image box 30, the transparent image box 30 is placed on the overhead projector 2 again as shown in FIG. When exposed to light, the contour lines 11 drawn on each transparent sheet 10 emerge three-dimensionally in space, and the shape of blood vessels and the positional relationship of peripheral organs at the site requiring treatment appear three-dimensionally. It can be observed with the naked eye from a desired angle such as oblique or horizontal. This observation can be performed not only by the attending physician but also by anyone, such as a nurse or a patient, so that more appropriate medical treatment can be obtained. It should be noted that the illumination is not necessarily required to be that of an overhead projector, but can be sufficiently observed as long as light can be applied from below even with ordinary room-temperature illumination light.

Further, in the above embodiment, the stereoscopic image is a full-size image.However, a projected image is enlarged or a space between a CT scan and an image box shelf is appropriately changed according to a purpose of use such as a medical teaching material to partially enlarge or reduce the size. A stereoscopic image may be created and observed.

FIGS. 3 (a) and 3 (b) are views for explaining the creation of a three-dimensional model, where 40 is a three-dimensional model, and 41 is a sponge rubber.

It is also easy to create a three-dimensional model from a three-dimensional image as in the above-described embodiment. First, as shown in FIG. 3A, a dense sponge rubber 41 having a width of 5 to 10 mm is cut out in accordance with the projected image.

Then, as shown in FIG. 2B, the three-dimensional model 40 is created by bonding while accurately aligning the positions with each other. Taking the thoracic aorta as an example, a stereoscopic image could be created in about 30 minutes and a stereoscopic model could be created in about 3 hours.

〔The invention's effect〕

As described above, according to the present invention, since an image obtained by a tomographic image can be represented in space as a full-size stereoscopic image, it can be seen through from multiple directions, and a complicated three-dimensional internal structure can be seen at a glance. Can understand three-dimensionally. Therefore,
For example, if used in the medical field, it is possible to three-dimensionally grasp the relationship between organs inside the body, and to accurately grasp the presence of vascular disorders such as aortic aneurysm and aortic dissection, and tumors such as brain tumors and mediastinal tumors. This is an extremely effective means for making an accurate diagnosis. Further, the apparatus used in the present invention is inexpensive, the time required for creation is short, and it can be easily made by anyone, and the image interpretation ability is improved. Further, the apparatus used is portable, can easily store materials, can be applied to MRI images, and can apply the present invention to create a full-scale three-dimensional model of an organ.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram for explaining a simple stereoscopic image creating method according to the present invention.
(A) is a side view showing the projection of the CT image taking film,
FIG. 2B is a perspective view of the transparent sheet, FIG. 3C is a perspective view of the transparent container, FIG. 2 is a perspective view when the transparent container is irradiated with illumination light, and FIG. FIG. 1 ... CT imaging film, 2 ... Overhead projector, 3 ... Lens, 4,5 ... Mirror, 6 ... Projection table, 10 ... Transparent sheet, 11 ... Contour line, 20 ... Glass plate, 30 …… Image box, 31 ……
Shelf, 32 ... Filter, 40 ... Solid model, 41 ... Sponge rubber.

Claims (4)

(57) [Claims] 1. A plurality of CT image photographing films are sequentially irradiated with illuminating light to project a CT image onto a plurality of light transmitting sheets by an optical system, and a projected image is sequentially traced on each sheet to form a trace image. A simple three-dimensional image creation method, wherein a plurality of drawn sheets are stacked on a transparent container at predetermined intervals in the order of CT images, and a three-dimensional trace image is obtained by irradiating illumination light. 2. The method according to claim 1, wherein the projection image is a full-size image, and
2. The simple stereoscopic image creating method according to claim 1, wherein an image scanning interval and an interval between shelves provided on the transparent container are the same. 3. The simple stereoscopic image creating method according to claim 1, wherein the stereoscopic image is partially enlarged or reduced by changing a scan interval of the CT image and an interval of a shelf provided in a transparent container. 4. The light-transmitting sheet is trace paper, and each shelf of the transparent container has a transparent glass, and the trace paper is placed on the transparent glass to obtain a three-dimensional image.
The simple stereoscopic image creation method according to any one of the above.