Bladder capacity determination and three-dimensional shape evaluation method and system special for radiotherapy

Abstract

The invention relates to a bladder capacity determination and three-dimensional shape evaluation method and system special for radiotherapy. The method comprises the following steps: 1, adopting an ultrasonic diagnosis probe to emit ultrasonic waves to the abdomen of a human body under the action of high-frequency electric pulses; receiving echo signals emitted by the organ wall of the human body, analyzing image information through a processing terminal according to the echo signals, and acquiring a current bladder capacity value according to image information in combination with a bladder instrument of a neural network harmonic technology; 2, collecting ultrasonic image information during simulated positioning and ultrasonic image information before each treatment for reinforcement learning registration training to obtain a model which is used for guiding rapid registration of ultrasonic images of a subsequent new patient; 3, after registration, calculating a dice similarity coefficient DSC of a bladder image A during positioning and a bladder image B before each treatment; and 4, collecting the bladder capacity value and corresponding DSC data, establishing a one-to-one corresponding data set, and carrying out comparative analysis to obtain an optimal bladder capacity value so as to guide subsequent treatment.

Description

technical field [0001] The invention relates to the field of medical and health technologies, in particular to a radiotherapy-specific method and system for measuring bladder volume and evaluating three-dimensional shape. Background technique [0002] For pelvic tumors, changes in bladder filling during external beam radiation therapy may lead to insufficient or oversized target coverage unless the radiation coverage is expanded or reduced. Therefore, in order to maintain the consistency of bladder filling, it is necessary to evaluate the bladder volume and shape of the patient before each treatment, to ensure that the volume and shape of the bladder are consistent with the simulation positioning, and to minimize the side effects of radiotherapy caused by changes in bladder filling. Existing bladder volume measurement methods mainly include two-dimensional and three-dimensional ultrasound imaging measurement methods, CT measurement methods, and bladder bioelectrical impedanc...

AI Technical Summary

Problems solved by technology

The two-dimensional ultrasound measurement method uses mathematical formulas to calculate the bladder volume based on the geometric assumption that the shape of the bladder is an ellipsoid. Since the bladder is compressed by organs such as the intestine, uterus or prostate, its shape cannot be a completely regular geometry, so Two-dimensional Ultrasonic Mathematical Formula Method Inevitably Exists Bias in Bladder Volume Measurement

[0005] The final result of these measurement methods in the prior art is to focus on the bladder volume value, but lacks the assessment of its three-dimensional shape and volume change. The same patient may have different bladder shapes under the same bladder volume value, and the change of the three-dimensional shape of the bladder is The most critical factor affecting the coverage of the target area. Therefore, the applicant considers to use the three-dimensional ultrasound image data, combined with the algorithm, to introduce the assessment parameters of the three-dimensional shape of the bladder, combined with the volume value of the bladder, to conduct a comprehensive assessment of the patient, so as to implement precise radiotherapy for patients with pelvic tumors. Escort

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