Patient positioning variations to reduce dose to normal tissues during 3D conformal radiotherapy for high-risk prostate cancer
| Autor: | Péter Ágoston, K. Czigner, Miklós Kásler, Gyula Forgács |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Oncology
Male medicine.medical_specialty Supine position medicine.medical_treatment Patient Positioning Prostate cancer Radiation Protection Prostate Internal medicine medicine Humans Radiology Nuclear Medicine and imaging Radiation Injuries Pelvis Fixation (histology) Aged Aged 80 and over business.industry Radiotherapy Planning Computer-Assisted Prostatic Neoplasms Radiotherapy Dosage Middle Aged medicine.disease Radiation therapy Prone position medicine.anatomical_structure Treatment Outcome Abdomen Female Radiotherapy Conformal Nuclear medicine business |
| Zdroj: | Strahlentherapie und Onkologie : Organ der Deutschen Rontgengesellschaft ... [et al]. 188(9) |
| ISSN: | 1439-099X |
| Popis: | The goal of this work was to assess optimal treatment positioning of 3D conformal radiotherapy (3DCRT) for high-risk prostate cancer patients. Treatment plans of 25 patients in different patient positions were evaluated: with knee and ankle support (KAS) in the supine position and with a belly board (BB) in the prone position both with full (FB) and empty bladder (EB). Planning target volumes (PTVs) for pelvis, prostate and vesicles, prostate, and organs at risk (OARs) were delineated. Dose and overlapping volumes were evaluated. Overlapping volumes were significantly smaller with a FB than with an EB. No significant differences were found in overlapping volumes with respect to patient fixation systems, but the percentage values of dose to the OARs showed significantly better results employing KAS than a BB. A FB reduced the dose volumes to the OARs. Comparison with respect to circumference of abdomen (CA) showed significantly smaller overlapping at large CA in most of the cases. Supine position is suggested with KAS combined with a FB (especially in cases of larger CA) when using 3DCRT with planning technique modification for high-risk prostate cancer patients to reduce the dose of OARs, based on our results. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink