On-line analysis method for real-time monitoring of dose of radiotherapy patient

Abstract

The application discloses an on-line analysis method for real-time monitoring of the dose of a radiotherapy patient, comprising the following steps: step 1, a first set of detectors on a head of a connected radiotherapy machine collect the beaming dose data of the radiotherapy machine during each radiotherapy treatment in real time, and transmits the data to a microcontroller in real time, and then the microcontroller transmits the data to a special database in a memory for storage; step two, through a second set of detectors arranged on a human body surface, the real-time radiation dose actually received by the human body surface is sent to the microcontroller through a network, and then passed to the special database in the memory via the microcontroller; and step three, by calling the two sets of data in the special database, the microcontroller uses a comparative analysis module for real-time comparative analysis and calculates the dose error, and through continuous iteration of historical data in the special database, the model is optimized once the error is calculated, so that a recommended dose calculated the next time is more optimized.

Description

technical field [0001] The invention relates to the field of radiotherapy, in particular to an on-line analysis method for real-time monitoring of dose of radiotherapy patients. Background technique [0002] Radiation therapy is one of the important treatment methods for cancer at present. Before using precise radiotherapy techniques such as 3D conformal radiotherapy, intensity-modulated radiotherapy, and 3D stereotactic radiotherapy to treat patients, it is necessary to use the radiotherapy planning system (TPS) to design the patient's radiation therapy. treatment plan. Before formal treatment, in order to verify whether the actual radiation dose is consistent with the expected dose calculated by TPS, the so-called "uniform phantom plan transplantation indirect analogy method" is usually used to first construct a phantom exactly the same as the patient's CT scan , and then use TPS to transplant all the irradiation parameters of the patient's radiotherapy plan into the CT i...

AI Technical Summary

Problems solved by technology

[0003] However, the uniform phantoms that are commonly used now usually only contain one or several (2-3) relatively uniform density materials, which are compatible with various muscle tissues, lung tissues, bone tissues, cartilage tissues, and cavities in the human body. There are significant differences in density, shape and spatial distribution, etc., and the impact on radiation is also different. Therefore, the radiotherapy plan is transplanted to a uniform phantom for analogy, ignoring the impact of different tissue densities and their interfaces on radiation; The method uses different dose calculation models in the simulation and actual measurement, and the difference between the calculation results is not accurate enough, and there is no statistical analysis of the difference in dose distribution, so that researchers cannot clearly understand the specific situation of the difference and the space in which it is located. Location

More importantly, this dose verification is only performed once before the start of radiotherapy, and the actual dose of the patient is likely to be inaccurate due to changes in body position, body shape, and radiotherapy equipment parameters in subsequent multiple treatments, and doctors cannot grasp the dose deviation value , cannot be corrected

Using the phantom dose to infer the patient's dose is only an initial theoretical value, which does not reflect the actual dose received by the patient, and cannot accurately determine the actual dose received by the patient

When the patient receives radiation therapy, it is difficult to measure the actual dose received in the patient without trauma, and it is not advisable to directly measure the radiation dose received by inserting the instrument into the patient's body

Images