patch

Abstract

To address such a problem that in radiofrequency ablation surgery, although it is possible to identify a cancerous area using a CT device before surgery, when the cancerous area is small, it is difficult for a surgeon to determine a puncture position of a radiofrequency ablation probe, and to provide a patch for determining a position of foreign objects inside a patient's body, a lesion area and an affected area on a body surface.SOLUTION: When using a CT device, a patch with a plate-shaped radiopaque material is used during internal diagnostic X-ray imaging to mark a position on a body surface, the radiopaque material having a plurality of cutouts C1, C3 and C5 within a radiopaque material x range. A surgical procedure of a surgeon is facilitated by specifying a surgical position in an X-ray irradiation direction from an X-ray image, on the body surface of a patient. The captured CT image shows the affected area and the radiopaque material simultaneously, so that a puncture position of a tip of the radiofrequency ablation probe can be easily determined by a positional relation between the affected part and the X-ray patch, thus facilitating the procedure and improving the treatment efficacy. The patch can be used in diagnosis using both general-purpose X-ray equipment and CT equipment.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] A diagnostic medical treatment that uses X-ray equipment to take images of the inside of the body and determine the location of the affected area on the body surface. [Background technology]

[0002] If liver cancer is found through X-ray diagnosis, surgical procedures such as open surgery, laparoscopic surgery, and radiofrequency ablation are performed. In radiofrequency ablation surgery, after various diagnostic procedures such as X-rays, electromagnetic waves, and ultrasound, the needle at the tip of the radiofrequency ablation probe is inserted into the surface of the body to cauterize the affected area. Summary of the Invention [Problem to be solved by the invention]

[0003] Even if the affected area of ​​a patient can be seen on an X-ray image, it is difficult for medical personnel to accurately determine the location of the affected area on the body surface when viewed from above. In the diagnosis of liver cancer patients using an X-ray device before surgery, the position on the body surface where the tip of the radiofrequency ablation probe will be inserted is uncertain for the surgeon until just before surgery. [Means for solving the problem]

[0004] The patch is made of a plate-shaped radiopaque material having a thickness of 6 μm to 2 mm and an adhesive on one side, and has a plurality of cutouts that penetrate the front and back of the plate. One of the multiple cutouts is suitable for use with a high-resolution CT (Computed Tomography) X-ray diagnostic device, while the other is suitable for use with general-purpose X-ray diagnostic devices, etc. This provides a patch with cutouts of different sizes to suit the image analysis capabilities of each device, allowing medical professionals to select the size of the cutout that best suits the performance of their diagnostic device.

[0005] The patch is provided by attaching the radiopaque material to a bandage-like substrate and providing multiple cutouts within the radiopaque material that penetrate the substrate at the same positions as the substrate.The patch attached to the substrate can be handled more easily by medical professionals.

[0006] When imaging with a CT diagnostic device, this patch is applied in two or more locations on the body surface around the liver. The cutout area within the radiopaque material allows for easy measurement of the affected area and its position relative to the cancerous area. CT devices have high image resolution, approximately 0.1 square millimeters, depending on the CT model. Therefore, if the cutout area of ​​this patch is 0.1 square millimeters or larger, the coordinates of the cutout area can be obtained.

[0007] The coordinate information obtained by pattern recognition in CT images is calculated together with the coordinates of the affected area to determine its position on the body surface. When pattern recognition is not possible in CT images, an arbitrary cut area can be marked with a skin pen to obtain its coordinates on the body surface. The obtained coordinate information is calculated together with the coordinates of the affected area to determine its position on the body surface. The position on the body surface is the position of the affected area, lesion, or foreign object on the body surface as seen from the direction of X-ray irradiation. The use of a skin pen can also be applied to general-purpose X-ray diagnosis. [Effects of the Invention]

[0008] By using this patch during CT imaging, the location of the affected area on the body surface can be determined, providing the surgeon with a guide for inserting the tip of the radiofrequency ablation probe. Furthermore, CT images show the depth distance between the affected area and the body surface, making surgery safer.

[0009] The use of this patch is useful for diagnosis using X-ray images, and enables shortening of surgical operation time, reduction of wound size, determination of wound position, and improvement of surgical accuracy. This patch can be used with both general-purpose X-ray and CT diagnostic equipment. [Brief explanation of the drawings]

[0010] [Figure 1] In FIG. 1, a rectangular radiopaque material X has three circular cutouts C1, C3, and C5 of different sizes. [Figure 2] FIG. 2 shows a rectangular radiopaque material X with two square cutouts B3 and B5 of different sizes. [Figure 3]FIG. 3 is a simplified frontal view of a CT image of liver cancer in which the patch of the present invention shown in FIG. 2 is used. DETAILED DESCRIPTION OF THE INVENTION

[0011] The patch has an X-ray opaque material and a cutout that runs through both the front and back. In addition, some CT scanners have a high resolution of 0.1 mm or less, and the coordinates of this cutout are calculated. In order to implement this patch, the minimum cutout size was 0.5 mm square.

[0012] The area of ​​the cutout is preferably 0.5 mm square to 5 mm square, and the area of ​​the front surface of the radiopaque material is preferably 5 mm square to 50 mm square. If the cutout area is too small to use a skin pen, the cutout in the substrate need not be made, but can be used in the other cutout. The patch preferably has two to five cutouts. [Example] [Example]

[0013] As shown in Figure 1, a piece of stainless steel tape, 0.12 mm thick, was cut into a size of 10 x 20 mm to serve as the radiopaque material X, and cutouts C1, C3, and C5 were placed within the area of ​​this radiopaque material X. Cutouts C3 and C5 can be marked on the body surface with a skin pen. C3 is 3 mm in diameter, and C5 is 5 mm in diameter. C1 is 1 mm in diameter, and by applying pattern recognition to a computer program, more accurate coordinates on the body surface can be obtained. [Example]

[0014] As shown in Figure 2, a 10 x 20 mm piece of stainless steel tape with a thickness of 0.12 mm was cut as radiopaque material X, and square cutouts B3 and B5 were placed horizontally within the area of ​​this radiopaque material X. Cutouts B3 and B5 can be marked on the body surface with a skin pen. B3 has a side length of 3mm, and B5 has a side length of 5mm.

[0015] Figure 3 is a CT image of liver cancer, a simplified diagram of the front of a human body using the patch of the present invention shown in Figure 2. In this example, there are patches R and L and affected area T. Point K is determined, where the vertical axis of affected area T intersects with the line between patch RL. The distances TK, LK, and RK can then be calculated. This makes it possible to mark the position of affected area T on the body surface. B3 was selected for the cutout area of ​​this patch for both R and L. This selection can also be made using software pattern recognition, and coordinates can also be created. [Industrial Applicability]

[0016] This patch can be used during general-purpose X-ray examinations or CT scans, allowing the surgical site on the patient's affected area to be marked on the body surface with a skin pen. [Explanation of symbols]

[0017] X...X-ray opaque material C1, C3 and C5...cutouts 1mm, 3mm and 5mm diameter respectively B3, B5...Cutout area: Square with sides of 3mm and 5mm respectively L...The patch in Figure 3 on the left of the human body during CT imaging R...The patch in Figure 3 on the right of the human body during CT imaging T...Location of liver cancer K...The point on the vertical axis of the liver cancer between the left and right RL patches

Claims

1. A patch characterized by having a plurality of cutouts penetrating the front and back of a plate-shaped X-ray-opaque material.

2. 2. The patch according to claim 1, wherein the area of ​​each cutout portion is 0.5 mm square to 5 mm square.

3. 2. The patch according to claim 1, wherein the number of cutouts is 2 to 5.

4. 2. The patch according to claim 1, wherein the front surface area of ​​the plate-shaped radiopaque substance according to claim 1 is 5 mm square to 50 mm square.

5. 2. The patch according to claim 1, wherein the thickness of the plate-shaped radiopaque substance according to claim 1 is 6 μm to 2 mm.

Images