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- Title
Three-dimensional conformal radiation therapy in the treatment of rectal neoplasm.
- Authors
Grosu, Valentin; Albu, Elena Marcela; Grosu, Angela
- Abstract
Rectal cancer is the fourth most commonly diagnosed cancer and the second cause of mortality. Risk factors for rectal cancer are: environmental factors, diet, excessive consumption of meat and alcohol, low folate consumption, family history of rectal cancer. The rectal cancer's clinical signs are minimal or non-specific symptoms: alteration of intestinal transit alternating diarrhea with constipation, rectal haemorrhage, rectal tenesmus, abdominal pain. The goal of three-dimensional conformal radiation therapy are: the geometric matching of the irradiated volumes with the treated tumour tissue; modelling the prescribed dose distribution in the target volume; minimizing the dose that gets to healthy tissue. The indication is established within a multidisciplinary committee: oncologist, radiotherapist, and surgeon. The radiotherapist should consider the following: tumour location, distance to the anal sphincter, type of surgery, and tumour position relative to OAR. Steps in the three-dimensional conformal radiation therapy: image acquisition by CT investigation; images are transferred to the conturing console; validation of the treatment plan by the physician; transmition of treatment plan to Varian Linear Accelerator; performing portal imaging and starting irradiation. Conclusions. RT-3D CRT is a modern irradiation technique that offers: a suitable dose distribution for the therapeutic intention, geometric matching of volumes irradiated with the tumour tissue, and reduced side effects by getting a minimum dose in healthy tissue.
- Subjects
RECTAL cancer treatment; RADIOTHERAPY treatment planning; IRRADIATION
- Publication
Oncolog-Hematolog, 2017, Issue 39, p61
- ISSN
2066-8716
- Publication type
Article