Method and apparatus for correcting subsidence amount of sickbed

Abstract

The present invention belongs to the radiotherapy field and discloses a method or apparatus for correcting the subsidence amount of a sickbed. The method comprises the following steps that: the image of a patient is obtained; the distribution function of the subsidence amount of the sickbed is searched according to the weight of the patient and the movement distance of the sickbed, a subsidence amount corresponding to the image is obtained, and the distribution function of the subsidence amount of the sickbed is the distribution of the relative subsidence amount of the sickbed with respect to the weight of the load and the movement distance of the sickbed; and the subsidence amount is utilized to correct the image or the arrangement error of the patient. With the method or apparatus for correcting the subsidence amount of the sickbed of the invention adopted, the relative subsidence amount of a radiotherapy device and an imaging device can be corrected, the relative subsidence amounts of the sickbed at the imaging device side which are obtained under a condition that the sickbed moves different distances can be corrected, and correction accuracy is higher.

Description

technical field [0001] The invention relates to the field of radiotherapy, in particular to a method and a device for correcting the subsidence of a hospital bed. Background technique [0002] Radiation therapy is one of the important means of tumor treatment, and radiation therapy planning refers to the optimal design of the radiation therapy plan. In order to ensure that patients can obtain the correct treatment plan and high-quality radiotherapy, a radiotherapy plan must be designed and formulated before radiotherapy. [0003] Before making a radiotherapy plan, use medical diagnostic equipment to collect images of the patient to determine the location and shape of the tumor, and calculate the radiation dose; before implementing the radiotherapy plan, in order to accurately position the patient, it is usually necessary to acquire the patient’s image again to guide The treatment field is precisely matched to the set-up position. The integration of medical accelerators and...

AI Technical Summary

Problems solved by technology

This method is mainly limited by the error of the software algorithm. For example, when the segmentation algorithm segments the bed board in the image, it depends on the CT value of the pixel and the adhesion between the bed board and other objects; and the algorithm depends on the spatial resolution, and the spatial resolution is not enough. Affect the accuracy of the sinking amount; secondly, markers are generally placed manually on the hospital bed, and placing markers manually will also introduce errors

[0008] Therefore, there is no method or device in the prior art that can better correct the sinking of the sickbed.

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