Phantom model sport platform and method for sport simulating

Abstract

The invention discloses a phantom motion platform and a method for processing the motion simulation, wherein the phantom motion platform includes a telemechamic apparatus, a step motor driver and a control device. The telemechamic apparatus is a precise numerical control table matching with two step motors. The step motors are respectively connected with the step motor driver, while the step motor driver and the precise numerical control table are connected with the control device. The method to process the motion simulation is: the parameters of the motion trace, the amplitude and the rotate speed etc are set in advance, and the control device computes the required frequency and sends to the drivers, so the control step motor drives the precise numerical control table to move. The invention has simple structure, high kinematic accuracy, which can process the straight line, the diamond and ellipse motion having different frequency and amplitude, and systematacially simulate the motion of the human body apparatus, and provides effective means for the clinical diagnosis, quality assurance and the quality control.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to sports equipment for simulating the boundary changes of human lungs and other organs under the action of respiratory movement and the like. Background technique [0002] In recent years, the morbidity and mortality of lung cancer in my country have been on the rise, ranking first in cancer deaths in many areas. About 75% of lung cancer is non-small cell lung cancer (NSCLC). Radiation therapy is one of the main treatment methods for NSCLC, but the curative effect of traditional radiation therapy is very poor, the 5-year survival rate is only 5% to 10%, and the median survival period is only 10 to 15 months. The rapid development of precise radiotherapy techniques such as 3-dimensional conformal radiation therapy (3DCRT) and intensity modulated radiation therapy (IMRT) has improved the efficacy of radiotherapy for lung cancer to a certain extent. The most important and basic step...

AI Technical Summary

Problems solved by technology

[0007] In the routine clinical PET-CT examination process, CT adopts helical scanning, which can complete chest image acquisition in a very short time (a few seconds to a dozen seconds), and each layer of CT image only represents a small part of the respiratory cycle Especially in the case of no respiratory control, it is easy to form motion artifacts, and the shape and volume of the tumor will be deformed. This uncertainty will inevitably lead to the increase of the target volume when making a radiotherapy plan, resulting in excessive radiation. The normal lung tissue of normal lung tissue receives unnecessary high-dose irradiation, and it is also easy to cause tumor leakage and treatment failure; while the acquisition of each effective field of view of PET takes about 3-7 minutes, covering multiple respiratory cycles, representing average information

This difference in acquisition time and the influence of breathing motion will cause a mismatch in the position of the two image information of the chest image. When the attenuation correction is performed on the PET image with this mismatched CT data, it will lead to tumor localization in the PET image. errors and inaccurate quantitative calculation of standard uptake value (SUV)

For the PET image itself, regardless of whether the lesion moves or not, the total radioactive count detected by the detector is fixed within a period of time, and the image volume of the moving lesion will increase, which will inevitably lead to a decrease in the radioactivity concentration per pixel in the lesion. , so that the image of the PET image is blurred, the contrast is reduced, the SUV value is reduced, the image quality is reduced, and the estimated lesion volume is too high

If these two images are used to fuse and delineate the target area without analysis and processing, it will inevitably increase the volume of the tumor target area, which may make it difficult for the moving tumor to receive a sufficient amount of radiation dose, and at the same time cause the surrounding normal lung tissue to receive radiation dose. Unnecessarily higher doses of radiation that may affect the final outcome

Images