JP2015018130A - Visceral organ model and phantom model - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a visceral organ model and a phantom model capable of more correctly evaluating performance of, for example, a CT inspection device for inspecting tumors.SOLUTION: A visceral organ model 20 is inserted into a circular column recess part 12 formed on a model body 10 which simulates a whole body or part of a human body for attachment, for simulating accurately tumors generated inside of the viscera. The visceral organ model 20 has a body 21 which is a cylindrical hollow shape with an opening, and has plural simulation tumors 2 projected from an inner peripheral surface and having different shapes each other, and a lid body 22 detachably attached to the opening.

Description

  The present invention relates to a visceral model and a human body model used for evaluating the performance of a CT examination apparatus, for example.

  This type of model called a phantom is used for a simulation experiment for evaluating the performance of an inspection apparatus, and it is important to accurately simulate an inspection object of the inspection apparatus.

  For example, the phantom described in Patent Document 1 is used for performance evaluation of a device for examining a tumor generated in the body. An internal organ model and a tumor mimetic are placed inside the phantom, It is configured to be able to evaluate whether it can be detected by a probe.

  However, this phantom cannot accurately evaluate the performance of, for example, a CT inspection apparatus for inspecting a tumor generated in the internal organs. This is because, in the above-described configuration, the simulated body is only adjacent to the internal organ model, and the tumor generated in the internal organ to be examined cannot be accurately simulated.

JP 2005-221642 A

  Accordingly, the main object of the present invention is to more accurately evaluate the performance of, for example, a CT examination apparatus for examining a tumor.

  That is, the visceral model according to the present invention is attached to a model body simulating all or part of a human body, and has a hollow shape in which a simulated tumor is formed on the inner peripheral surface. Is.

  In such a case, since the tumor generated inside the internal organs can be simulated with high accuracy, the result of the simulation experiment using this internal organ model, for example, with a CT examination apparatus is compared with the size and position of the simulated tumor. This makes it possible to more accurately evaluate performance such as accuracy and detection limit of the inspection apparatus.

It is preferable to include a hollow body having an opening and a lid that is detachably provided in the opening.
In such a case, for example, barium or the like is poured into the hollow interior and discharged, so that barium or the like remains on the inner surface of the body to form a barium layer or the like. Thereby, for example, it is possible to cope with a simulation experiment assuming that barium or the like is used in CT examination or the like.

It is desirable to form a cylindrical shape and to be attached by being inserted into a cylindrical recess formed in the model body.
If this is the case, the position of the simulated tumor can be changed by rotating the visceral model when attached to the model body, so by performing a simulation experiment with the tumor formed in various positions, for example, It is possible to know the optimal imaging method such as how to apply radiation to the patient and the patient's attitude.

In order to simultaneously perform a simulation experiment under various conditions, it is desirable that a plurality of the simulated tumors are formed so as to protrude from the inner peripheral surface, and the shapes of the simulated tumors are different from each other.
If it is such, the performance difference of the test | inspection apparatus by the difference in tumor shape can be evaluated.
The shape mentioned here includes not only the shape but also the size.

  A human body model having such a visceral model according to the present invention is also one aspect of the present invention. That is, the human body model according to the present invention comprises a model body that simulates all or part of a human body, and a built-in model that is attached to the model body, and the built-in model is according to the present invention. And

  As described above, according to the present invention, a tumor generated in the internal organs can be simulated with high accuracy, so that the performance of a CT examination apparatus or the like can be more accurately evaluated by a simulation experiment.

The whole figure which looked at the human body model in one embodiment of the present invention from the waist side. The whole figure which looked at the human body model in the embodiment from the thigh side. Sectional drawing which shows the internal organ model in the embodiment. The perspective view which shows the internal organ model in the embodiment. The figure which shows the internal organ model in other embodiment.

  An embodiment of the present invention will be described below with reference to the drawings.

  The human body model 100 according to the present embodiment includes a model main body 10 molded by simulating a part of the body and a visceral model 20 attached to the model main body 10.

  In this embodiment, the model main body 10 simulates from the waist to the thigh as shown in FIGS. 1 and 2, and is molded using a resin such as polyurethane, for example.

  In the model main body 10, an artificial bone 13 made of, for example, an epoxy resin is provided at a position corresponding to, for example, the lumbar vertebra or the femur.

  As shown in FIGS. 1 and 2, the model main body 10 configured in this way is formed with a plurality of recesses 12 simulating a body cavity in which an internal organ such as the intestine is accommodated.

  Specifically, for example, a first recess 12a simulating a body cavity in which the ascending colon is accommodated and a second recess 12b simulating a body cavity in which the descending colon is accommodated are formed on the lumbar end surface 11, for example, a rectum The 3rd recessed part 12c which simulated the body cavity accommodated is formed in the anal part which is not shown corresponding to the position of an anus. Hereinafter, when not distinguishing these recessed parts 12a, 12b, and 12c, it describes as the recessed part 12. FIG.

  Each of the recesses 12 has the same shape, and in this embodiment, has a cylindrical shape.

  An insertion hole 14 for attaching a dosimeter 30 for measuring the radiation dose is formed in the waist side end surface 11 of the model body 10.

  The internal organ model 20 is inserted into the above-described recess 12 and attached to the model main body 10. In the present embodiment, the internal organ model 20 is formed by simulating the intestine, for example, using a resin such as polyurethane.

Specifically, as shown in FIG. 3, the internal organ model 20 includes a body 21 having a bottomed cylindrical shape in which one end is closed and an opening 211 is formed at the other end, and the other end opening 211 is closed. 21 and a lid 22 that seals the internal space S.
The lid body 22 is configured to be detachable from the body 21.

The internal space S of the body 21 is filled with air, but a barium layer or the like may be formed on the inner surface of the body 21. As a method for forming the barium layer or the like, there is a method in which barium or the like is left on the inner surface of the body 21 by flowing and discharging barium or the like into the internal space S.
When the barium layer or the like is formed as described above, the lid 22 seals the internal space S, so that barium or the like can be reliably prevented from spilling out of the body 21.

  In the present embodiment, as shown in FIGS. 3 and 4, a plurality of simulated tumors 2 simulating tumors generated inside the internal organs are formed on the inner peripheral surface 212 of the body 21.

  These simulated tumors 2 are formed so as to protrude inward from the inner peripheral surface 212 of the body 21. In the present embodiment, each simulated tumor 2 and the body 21 are integrated.

Specifically, each simulated tumor 2 has a shape corresponding to the tumor to be simulated. For example, in order to simulate a large intestine polyp, the cross section perpendicular to the protruding direction has a circular shape, and gradually approaches the protruding tip. The shape having a small diameter is formed.
Each simulated tumor 2 is formed in a similar shape.

  The positional relationship between the simulated tumors 2 configured in this way is set so that the distances between the centers of the adjacent simulated tumors 2 are equal to each other while being formed along the axial direction of the body 21. ing.

  As shown in FIG. 3 and FIG. 4, the size relationship of each simulated tumor 2 is such that the height (the length in the protruding direction) and the cross-sectional dimension (the length in the radial direction) of the simulated tumor 2 are on the opening side of the body 21. It is set so that it gradually becomes smaller as it goes from the formed simulated tumor 2 to the back simulated tumor 2.

  Note that the above-described magnitude relationship may be set so as to gradually increase from the simulated tumor 2 formed on the opening side of the body 21 to the simulated tumor 2 in the back, and the height or cross-sectional dimension. Any one of these may be set to the same length.

The visceral model 20 configured as described above is inserted into a desired recess 12. In this embodiment, as shown in FIG.1 and FIG.2, the internal organ model 20 is inserted in the 1st recessed part 12a and the 3rd recessed part 12c.
For example, a dummy body 40 having a solid cylindrical shape, for example, for filling the second recess 12b is inserted into the second recess 12b into which the internal organ model 20 is not inserted.

  According to the human body model 100 according to the present embodiment configured as described above, the following effects can be obtained.

  Since the simulated tumor 2 formed on the inner peripheral surface 212 of the body 21 accurately simulates a tumor generated in the internal organs, the result of a simulation experiment in which the internal organ model 20 is applied to, for example, a CT examination apparatus or the like By comparing the size, position, and the like of the simulated tumor 2, it is possible to more accurately evaluate performance such as accuracy and detection limit of the inspection apparatus.

  Since a plurality of simulated tumors 2 are formed on the visceral model 20, a simulation experiment can be performed simultaneously under various conditions.

  Further, for example, barium is poured into the internal space S and discharged, so that barium or the like can remain on the inner surface of the body 21 to form a barium layer or the like. It is also possible to perform an assumed simulation.

  Furthermore, since the model body 10 is made of polyurethane having a transmittance equivalent to the transmittance of radiation to the human body, the conditions of the simulation experiment can be made closer to the actual inspection, and more accurate performance. Evaluation is possible.

  The model body 10 has an artificial bone 13, and the position of the simulated tumor 2 can be changed by rotating the visceral model 20 and inserting it into the recess 12, so that the tumor is formed at various positions. By performing a simulation experiment, it is possible to know an optimal imaging method such as how to apply radiation to a patient and how the patient is prepared. As a result, it is possible to avoid in advance a situation in which the tumor is hidden by the bone and does not appear in the photographed image depending on the size and position of the tumor, which may occur in an actual CT examination or the like.

  Furthermore, since the dosimeter 30 for measuring the radiation dose is attached, it is possible to evaluate the radiation dose received by the patient through a simulation experiment.

  By inserting the dummy body 40 into the concave portion 12, it is possible to perform a simulation experiment assuming a case where no tumor is generated inside the internal organs.

  The present invention is not limited to the above embodiment.

For example, as shown in FIG. 5, the shape of the simulated tumor 2 may be a shape in which the central portion of the protruding tip surface having a substantially planar shape is depressed.
In this way, by making the simulated tumor 2 have different shapes, it is possible to evaluate the performance difference of the inspection apparatus due to the difference in the shape of the simulated tumor 2.

  In the above-described embodiment, the simulated tumor 2 and the body 21 are integrated, but the simulated tumor 2 is formed of different materials and attached to the inner peripheral surface 212 of the body 21, so that an examination apparatus based on a difference in tumor components is used. The performance difference may be evaluated.

  Further, the interval between the adjacent simulated tumors 2 and the position or number of the formed simulated tumors 2 are not limited to the above embodiment.

  The internal organ model 20 may have a hollow polygonal column shape or a hollow sphere.

  The number and positions of the recesses 12 formed in the model body 10 are not limited to those in the above-described embodiment. For example, the first recesses 12a and the second recesses in the above-described embodiment are simulated so as to simulate a body cavity that accommodates the transverse colon. You may form so as to be orthogonal to the recessed part 12b.

  The model body 10 may be a container made of acrylic filled with water.

  Further, the model main body 10 may simulate, for example, the abdomen, chest, or the like, and the visceral model 20 may simulate, for example, the stomach or heart.

  In addition, it goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 100 ... Human body model 10 ... Model main body 12 ... Recess 20 ... Internal organ model 21 ... Body 212 ... Inner peripheral surface 2 ... Simulated tumor S ... Internal space

Claims (5)

  A visceral model which is attached to a model body simulating all or part of a human body and has a hollow shape in which a simulated tumor is formed on an inner peripheral surface.   The visceral model according to claim 1, further comprising: a hollow body having an opening formed therein; and a lid body detachably provided in the opening.   The internal organ model according to claim 1 or 2, wherein the internal organ model has a cylindrical shape and is attached by being inserted into a columnar recess formed in the model main body.   4. The visceral model according to claim 1, wherein a plurality of the simulated tumors are formed so as to protrude from the inner peripheral surface, and the shapes of the simulated tumors are different from each other. A human body model comprising a model body simulating all or part of a human body and the built-in model according to any one of claims 1 to 4 attached to the model body.