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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-24 11:35 |
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Conference: Bucharest University Faculty of Physics 2021 Meeting
Section: Biophysics; Medical Physics
Title:
The acceptance and commissioning of the linear accelerator Halcyon
Authors:
Mihai-Ștefan BÂRHALĂ, Cristina PETROIU
Affiliation:
MNT Healthcare - Neolife Bucharest
E-mail
mihai.barhala@gmail.com
Keywords:
Acceptance; Commissioning; Linear Accelerator
Abstract:
In the past years, because of the increase in the number of cancer patients, it was necessary to accelerate the process of finding new and innovative ways of treating this disease. Aside from the surgical intervention, the chemotherapy treatment and even the immunotherapy treatments, radiotherapy started to be a viable alternative or concomitant treatment, once the understanding and perfecting of the devices reached its peak. This method of destroying cancer cells by means of ionizing radiation had a significative evolution in the past 50 years, now that the top-tier methods of irradiation started to be available with ease, also being able to use different beam types, like X-ray beams, electron beams, proton beams and so on.
From the point of view of this treatment method, in the present, being taken into account the degree of error given by all the devices used for measuring data, along with the errors given by the linear accelerator itself, by means of its component movement or radiation beam deviation, the dose that has to be delivered to the target volume should not deviate more than 5% out of the prescribed dose. This criterion assumes a high degree of responsibility from the physicist team at the moment of measuring and implementing a linear accelerator with the purpose of treating patients.
These steps assume two sequences of measurements, the first one, in which the specific parameters of the linear accelerator are compared with the data given by the vendor and the second sequence, in which specific parameters needed to be implemented in the treatment planning system. Keeping this in mind, the responsibility of the medical physicist is to assure the correct measurements, so that the treatments could be performed with a high degree of confidence, leading to the final purpose of the treatment, the local control of the tumor or palliative action.
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