JP2852902B2 - Human body phantom for MRI equipment training - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an imaging training human body phantom applied for acquiring imaging techniques of an MRI apparatus (magnetic resonance imaging apparatus).

[0002]

2. Description of the Related Art At present, diagnosis is performed by a medical institution using an MRI apparatus. It is mainly a radiological technologist who operates the MRI apparatus to take an image of a subject (human body), but sometimes a doctor makes a diagnosis while directly involved in the imaging. It is necessary to train a certain amount of training in order to acquire the imaging technique of the MRI apparatus, but conventionally, there is no appropriate human phantom for training, and the imaging technique is acquired by observing the diagnosis of the patient and accumulating the actual diagnosis. However, in this case, it takes time to learn the technique, and the development of a human phantom for photography training is urgently needed.

[0003]

As a human body phantom for acquiring an imaging technique of an MRI apparatus, for example, Japanese Unexamined Patent Publication No. Sho 6
It is conceivable to use a phantom equivalent to a human body provided by Japanese Patent Application Publication No. 4-86952, but this phantom has the following problems.

[0004] Since it is equivalent to a human body, the contrast of a tomographic image projected on a monitor is unclear and is not suitable for training for acquiring a photography technique.
In an actual medical practice, an MR contrast agent is injected into a patient in order to make the contrast of a tomographic image clear and facilitate diagnosis.

[0005] It is difficult to arrange various organs along the human body, and a tomographic image projected on a monitor tends to be different from a human body.

C. Since an affected part such as a tumor is not provided, it is not possible to perform a training of an imaging technique necessary for an actual diagnosis, such as discriminating an affected part from healthy tissue while looking at a tomographic image projected on a monitor.

An object of the present invention is to provide a human body phantom for radiography training that is useful when applied for learning radiography techniques of an MRI apparatus.

[0008]

SUMMARY OF THE INVENTION The present invention provides a human body shell,
Various simulated organs including at least one simulated diseased part provided in each part of the skeleton so as to be substantially in the same arrangement state as the human body, and the skeleton housed and stored in the human body shell part, and the human body shell A gelatin jelly layer as a soft tissue for fixing the skeleton and various simulated organs at predetermined positions in a state filled in the part, the skeleton is assembled from human bone impregnated with gelatin jelly, and the simulated affected part is An MRI apparatus characterized in that the various simulated organs contain gelatin jelly as a main component, and that the MR contrast agent is blended in the gelatin jelly in a different amount in principle for each simulated organ and simulated affected area. The human body phantom for photography training.

In the present invention, the human body phantom is 1
Although it may be composed of the body, it may be composed of, for example, three separate bodies of the head and neck, the skeleton, and the waist so as to be easy to use and use at the time of photographing.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the accompanying drawings.

The whole human phantom of the present invention is schematically shown in FIG. 1, and the human phantom is composed of three alternations of a head and neck A, a skeleton B and a waist C.

As is apparent from FIG. 1, the head and neck portion A has a head and neck outer shell 1a, a head and neck skeleton 2a housed in the outer shell 1a, and the skeleton 2a substantially the same as a human body. including various simulated organ 3, for example simulated brain 3 ₁ arranged such that, skeleton and the simulated organ is fixed to a predetermined site by a gelatin jelly layer 4a filled in the outer shell portion 1a.

The skeleton B includes a skeleton outer shell 1b, a skeleton frame 2b housed in the outer shell 1b, and a skeleton frame 2b.
Body and substantially the same arrangement so as to be the various simulated organ 3 such as the lung 3 _2, heart 3 _3, stomach 3 _4, liver 3 _5, pancreas 3 _6,
And a kidney 3 ₇ and one simulated affected area such as a tumor 3 _8, they skeleton, simulated organ and mock affected area outer shell 2
B is fixed at a predetermined site by a gelatin jelly layer 4b filled in the inside.

The waist C is a waist outer shell 1c, a waist skeleton 2c housed in the outer shell 1c, and a simulated organ arranged on the skeleton 2c so as to be substantially the same as a human body. 3 a for example colon 3 _9, skeleton and simulated organ outer shell portion 1c
It is fixed at a predetermined site by a gelatin jelly layer 4c filled therein. A plastic tube (not shown) made of polyethylene or the like in which gelatin jelly is enclosed as blood may be embedded in a part of the simulated organ.

The outer shells 1a, 1b, 1c are made of rubber or plastic, for example, polyurethane.

The skeletons 2a, 2b and 2c are made of human bones, and the human bones are impregnated with gelatin jelly in order to enable photographing. Human bones are available as imports.

As is apparent from the schematic diagram of FIG. 2, the simulated organ 3 is basically composed of an outer shell 3a of the organ and a gelatin layer 3b filled in the outer shell 3a. FIG.
Is to show the basic configuration of the simulated organ 3,
Various simulated organ 3 ₁ to 3 ₉ actually (including simulated affected area), as shown in FIG. 1, the shape of the actual organ is shaped to simulate the size.

[0018] Incidentally the lungs 3 _2, in order to include air, gelatin jelly layer 3b as shown in FIG. 4 are filled in the bubbling state.

Due to the distribution of water, gelatin is very close to the elemental composition of human tissue recommended by the International Commission on Radiological Protection, has the atomic composition shown in the following table, and is suitable for phantom materials.

Comparison of Elemental Composition between Gelatin and Human Tissue HCNO mineral ICRU (1965) 10.2 12.3 3.5 65.0 4.0 (standard man) ICRU (1965) 10.0 12.0 4.0 73.0 1.0 (wet tissue) ICRU sphere 10.1 11.1 2.6 76.2 (Publication26) Water 11.2 88.8 Rossi liquid 10.0 14.9 3.5 71.5 Glue (gelatin) 9.8 9.7 3.5 73.3 3.5 In the present invention, an MR contrast agent (for example, a cadmium preparation) is used in principle for gelatin jelly constituting various simulated organs and a simulated affected area. It is added in different amounts for each organ. Incidentally, the stomach, the large intestine, and the pancreas are portions that appear in substantially the same density when an actual human body is photographed, and the amount of the contrast agent added may be the same. An example of the composition of each organ is as follows. It is not usually necessary to add a contrast agent to soft tissue and gelatin jelly (skeleton) for impregnating human bone.

Mixing ratio of phantom material by organ (weight ratio) Gelatin (%) Water (%) Contrast agent (%) Foaming agent (%) Skeleton impregnating material 23.628 76.372 0.0 0.0 Soft tissue 23.628 76.372 0.0 0.0 Liver 23.623 76.362 0.025 0.0 Brain 23.625 76.362 0.012 0.0 Blood 23.624 76.357 0.019 0.0 Heart 23.628 76.370 0.002 0.0 Lung 16.555 53.509 0.0 29.936 Stomach 23.628 76.371 0.001 0.0 Kidney 23.617 76.333 0.050 0.0 Pancreas 23.628 76.371 0.0
01 0.0 Large intestine 23.628 76.371
0.001 0.0 Tumor 28.972 70.982 0.046 0.0 Additives such as preservatives can be added to the phantom material.

Since the human phantom of the present invention has a human skeleton as a skeleton, it is possible to arrange various simulated organs in the same manner as the human body, and since the simulated organ contains a contrast agent, it can be used as a tomographic image. The same clear contrast as when imaging a patient injected with a contrast agent can be obtained, and since a simulated diseased part such as a tumor is built-in, it is possible to compare the affected part with healthy tissue, as if it were an MR contrast agent. Can be trained as if the actual patient who injected the pills was used as a training table.

[0023]

The human phantom of the present invention is manufactured by imitating a patient injected with a contrast medium, and is ideal as an imaging training human phantom of an MRI apparatus.

[Brief description of the drawings]

FIG. 1 is a sectional view schematically showing an embodiment of the present invention.

FIG. 2 is a sectional view showing a basic configuration of a simulated organ applied to a human phantom of the present invention.

FIG. 3 is a cross-sectional view schematically showing a configuration of a simulated lung.

[Explanation of symbols]

1a Head and neck shell 1b Body shell 1c Waist shell 2a Head and neck skeleton 2b Body skeleton 2c Lumbar skeleton 3 Simulated organ 3 ₁ brain 3 ₂ lung 3 ₃ heart 3 ₄ stomach 3 ₅ liver 3 ₆ pancreas 3 ₇ Kidney 3 ₈ Affected Area 3 ₉ Large Intestine 3A Organ Shell 3B Gelatin Jelly Layer 4a Gelatin Jelly Layer 4b Gelatin Jelly Layer 4c Gelatin Jelly Layer

Claims (3)

(57) [Claims] 1. A human body shell part, a skeleton housed and installed in the human body shell part, and at least one simulated diseased part provided in each part of the skeleton so as to be arranged substantially in the same state as a human body. Various simulated organs, and a gelatin jelly layer as a human soft tissue for fixing the skeleton and various simulated organs at predetermined positions in a state where the skeleton is filled in the human outer shell, wherein the skeleton is impregnated with gelatin jelly. The various simulated organs including the simulated affected part contain gelatin jelly as a main component, and the MR contrast agent is mixed with the simulated affected part by changing the amount for each simulated organ and the simulated affected part in principle. A human body phantom for imaging training of an MRI apparatus, characterized in that: 2. The simulated organ includes at least a brain, medulla oblongata,
Bronchi, lungs, heart, aortic arch, stomach, liver, pancreas, kidney,
The human body phantom according to claim 1, further comprising an intestine. 3. The human body phantom according to claim 1, wherein the human body phantom is constituted by three alternations of a head and neck, a body, and a waist.