Dose Validation of Physical Wedged Asymmetric Fields in Artiste Linear Accelerator

• 作者: E. M. Abdelrazek Mostafa Elnaggar Rehab Omar Tamer Dawod
• 来源期刊: 医学物理学、临床工程、放射肿瘤学(英文)
• 学科: 医学
• 关键词: RADIOTHERAPY WEDGE Linear ACCELERATOR COMPUTERIZED Treatment Planning System
• 年，卷（期）: yxwlxlcgcfszlxyw_2014,（4）
• 页码范围: 201-209
• 页数: 9页
• 分类号: R73

摘要

Aim: The purpose of this study was to make a comparison between measured and calculated physical wedge dose distributions using the superposition algorithm. Settings and Design: The accurate determination of absorbed dose is important radiotherapy because of the relatively steep sigmoidal dose response curves for both tumor control and normal-tissue damage. Materials and Methods: High-energy photons (6 and 10 MV) from Artiste Treatment System Linear Accelerator Machine, available at Alexandria Ayadi Al-Mostakbal Oncology Center, were used. Results and Discussion: The results showed that the difference between measured and calculated wedged isodose curves depends on field size, beam energy, and the angle of the used wedge. Conclusion: The results showed that the presence of a wedge alters the primary and scattered components generated by a linear accelerator and causes beam hardening in 6 and 10 MV. The beam hardening increased as the wedge angle increased.