Applying Medical Physics in Radiotherapy Practice to Better and Accurate Treat
Subject Areas : biophsics
Seyed Alireza Mousavi Shirazi
1
1 - Islamic AZAD University, South Tehran Branch
Keywords: Dosimetry, Irradiation time, Radiotherapy, Tissue, Treatment planning.,
Abstract :
Two of the most important issues which nowadays are raised in the field of radiotherapy and medical physics, are treatment planning and dosimetry. Also, one of other important issues in radiotherapy practice is the required irradiation time, and the issue of how much time a patient must lie under radiation, because a patient being over-exposed under radiotherapy practice can cause serious damage to the healthy tissues, and being underexposed may also cause lesion and cancerous tumor to fail to be treated well. Thus, in this research, establishing a relationship between treatment planning and dosimetry causes determining the required irradiation time for a patient in a way that it will cause much more accuracy in radiotherapy practice. As specifying the geometry and dimensions of some of the very thin tissues, like skin and mucus tissues, and also their modeling are not possible for the calculation of the absorbed dose, some of the different models of phantoms can be applied as soft tissues. Thus, using treatment planning and also a precise dosimetry can help determine the required irritation time for a tissue, which is a vital parameter in radiotherapy practice. This prevents an overdose of radiation and protects healthy tissues of the body.
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