CN-122006146-A - Breast bracket for radiotherapy

CN122006146ACN 122006146 ACN122006146 ACN 122006146ACN-122006146-A

Abstract

The invention discloses a breast bracket for radiotherapy, which comprises a positioning plate provided with a base groove, an arm support arranged on the positioning plate and used for supporting arms of a patient undergoing radiotherapy, and the breast bracket comprises a platform base arranged in the base groove of the positioning plate, an arm support arranged on the platform base and capable of rotating relative to the platform base, an arm support arm arranged above the arm support and with one end in rotary connection with the arm support, an arm support arranged between the arm support and the arm support arm and used for adjusting the height of the arm support arm relative to the positioning plate, and an arm support structure arranged at the other end of the arm support arm and used for supporting arms of the patient undergoing radiotherapy. The breast bracket disclosed by the invention has the advantages that the occupied space of the arm bracket is small, the height and angle adjustment range of the arm bracket is large, the convenience degree is better, the arm bracket can be suitable for patients with different sizes and ages, the wrapping degree of the elbow of the patient is better, and the clinical comfort of the elbow part of the patient and the body position consistency during treatment during use are improved.

Inventors

LIU SIWEI
GAO XIANSHU
ZHAO BO
MA MINGWEI
ZHANG MIN
LI XIAOMEI

Assignees

北京大学第一医院(北京大学第一临床医学院)

Dates

Publication Date: 20260512
Application Date: 20260312

Claims (10)

1. A breast cradle for radiation therapy, comprising: A positioning plate provided with a base groove thereon; Install the arm support that is used for bearing radiotherapy patient's arm on the locating plate, it includes: A platform base mounted in the base recess of the locating plate; The support arm seat is arranged on the platform base and can rotate relative to the platform base; an arm support arm which is arranged above the arm support seat and one end of which is rotationally connected with the arm support arm; the support arm bracket is arranged between the support arm seat and the support arm and used for adjusting the height of the support arm relative to the positioning plate; The arm support structure is arranged at the other end of the arm support arm and used for supporting the arm of the radiotherapy patient.
2. The breast cradle for radiation therapy according to claim 1, wherein the upper surface of the platform base is flush with the upper surface of the positioning plate.
3. The breast support for radiotherapy according to claim 1, wherein the support arm base is rotatably mounted on the platform base by a fixing bolt with external threads at the lower part and a polish rod at the upper part.
4. The breast cradle for radiation therapy according to claim 1, said boom cradle comprising: One end of a cross rod of the support arm bracket is detachably arranged at one end of the support arm seat; the bottom of a longitudinal rod of the support arm bracket is arranged on the positioning plate, and the top of the longitudinal rod is clamped below the support arm of the arm bracket; The other end of the cross rod passes through the perforation on the longitudinal rod and the longitudinal rod is fixed on the cross rod through the locking nut.
5. The breast cradle for radiation therapy according to claim 4, said vertical rod comprising: the bottom of the bracket support rod is used for being arranged on the positioning plate, and the lower part of the bracket support rod is provided with the through hole; a support rod sleeve connected with the support rod of the bracket in a threaded way, the center of the top of the device is provided with a threaded hole; the height of the support arm relative to the positioning plate is adjusted by adjusting the height of the support rod sleeve screwed on the support rod of the bracket.
6. The breast cradle for radiation therapy according to claim 5, said vertical rod further comprising one or more sets of telescoping assemblies comprising: The lower part of the stepped stage link rod is provided with external threads on the smaller diameter section and the upper part of the stepped stage link rod; and the center of the top of the stage link rod sleeve is provided with a threaded hole.
7. The breast cradle for radiation therapy according to claim 5 or 6, the arm support structure comprising: arm supports which can be adapted to arms of different radiotherapy patients; the angle fine adjustment assembly is connected with the bottom of the arm support and used for adjusting the angle of the arm support by 360 degrees; the height fine adjustment assembly is connected with the bottom of the angle fine adjustment assembly and used for adjusting the height of the angle fine adjustment assembly; The height fine adjustment assembly is sleeved outside the platform support at the other end of the arm support arm.
8. The breast cradle for radiation therapy according to claim 7, wherein said arm rest comprises a plurality of split arm rests.
9. The breast support for radiation therapy according to claim 8, wherein the plurality of split arm supports are arm supports of different sizes.
10. The breast cradle for radiation therapy according to any one of claims 1-9, wherein the components of the arm support are made of carbon fiber.

Description

Breast bracket for radiotherapy Technical Field The invention relates to the technical field of medical equipment, in particular to a breast bracket for radiotherapy. Background With the continuous progress, ideas and treatment methods of radiotherapy, the demand for accurate irradiation of breast tumors is becoming more and more intense. Meanwhile, with the continuous rising of FFF mode (uneven mode), non-coplanar treatment and other technologies, and the continuous popularization of VMAT (rotation intensity modulated treatment) model and technology in clinic, the radiotherapy mode of breast cancer is also continuously changed and innovated. Compared with the early treatment scheme of breast cancer local by adopting the common and three-dimensional conformal technology, the position change of the structures usually has less influence on the irradiated dose of tumors and other normal tissue structures because the positions of the upper arm, the forearm, the elbow, the wrist and the hand are far away from the target area. Compared with the coplanar VMAT treatment or the non-coplanar intensity modulated treatment, the technology has larger position error redundancy, and a safety boundary of 5-20 mm is reserved during treatment, so that the change of the shape and the position of the relevant part can cause the change of the body position of a patient, but the change can be generally accepted clinically. With the continuous progress of the technology, a great deal of radiation therapy of breast cancer is currently carried out clinically by adopting an IMRT (fixed-field intensity modulated) technology. Compared with the early three-dimensional conformal scheme, the technical means is finer for the modulation of the dose, so that the treatment effect and coverage of the tumor are increased, and particularly compared with the early scheme, the scheme has better protection effect on surrounding normal tissues while guaranteeing the tumor load. However, this radiotherapy technique requires high patient position repeatability during the whole radiotherapy cycle, and small changes in the position and shape of the tumor and its surrounding normal tissues will cause overall dosimetry changes. A change in position, typically of a few millimeters, may cause the tumor or surrounding normal histodosimetry index to exceed clinically acceptable safety limits, thereby causing tumor under-or over-dosage, and even safety problems. For VMAT and non-coplanar breast radiotherapy protocols, however, there is a higher requirement for the patient's own body position repeatability throughout the radiation treatment period than for IMRT techniques. Particularly for non-coplanar radiotherapy techniques, there are positional requirements for all tissue structures in the path of the radiation. These normal tissues, which are more than 5cm from the tumor on the coronal plane and even further away from the tumor, may have less effect on the irradiated dose of the tumor when subjected to co-planar radiation therapy, but may not be the case when irradiated non-co-planar. A change in its position or shape can cause a large change in the tumor dose, which is generally clinically unacceptable. At present, when the breast tumor radiotherapy is clinically carried out, in order to ensure the body position consistency of the parts of the big arm, the forearm, the elbow and the like of a patient in the whole radiotherapy period, the body position of the patient is generally fixed by a special breast bracket which is used from the beginning of radiotherapy positioning to the end of radiotherapy, so that the body position change of the patient in the treatment period is reduced as much as possible. The most prominent feature of breast brackets compared with other radiotherapy body position fixing frames is that an arm fixing function is added, so that the importance of keeping the positions of arms consistent is seen. For breast cancer patients who have developed lymph node metastasis on the collarbone, the range of exposure for treatment is generally greater than for local exposure, and the range of exposure to the rostral side is required to reach the lower edge of the cricoid cartilage within the consensus of RTOG, while the range of exposure is greater after target area expansion. At the same time, breast radiotherapy generally adopts a positioning mode of lifting arms, so that tumors in the lifted arms and the collarbone area can be simultaneously present in the same horizontal plane during treatment, and the tumors also cause the arms to be present on a ray path at some angles, so that rays are attenuated. Therefore, maintaining the repeatability of the body position of the arm and the consistency in treatment are necessary conditions for accurate radiotherapy. Currently, the arm of the radiotherapy patient is usually positioned by using a breast bracket as shown in fig. 29, which comprises a positioning plate 100, a base 110 arranged on the posi