Evaluation of lung heterogeneity effects on dosimetric parameters in small photon fields using MAGIC polymer gel, Gafchromic film, and Monte Carlo simulation. (December 2020)

• Record Type: Journal Article
• Authors: Parwaie, Wrya; Geraily, Ghazale; Shirazi, Alireza; Yarahmadi, Mehran; Shakeri, Ahmad; Ardekani, Mahdieh Afkhami
• Is Part Of: Applied radiation and isotopes. Volume 166(2020:Dec.)
• Publication Date: 2020-12
• Subjects: Small field -- Heterogeneity -- MAGIC polymer Gel -- Penumbra; Radiology -- Periodicals; Radiation -- Industrial applications -- Periodicals; Nuclear chemistry -- Periodicals; Internet resource; Periodical; 660.298
• DOI: 10.1016/j.apradiso.2020.109233
• Languages: English
• ISSNs: 0969-8043

Abstract

Abstract: In this work, the performance of MAGIC polymer gel in measuring dosimetric parameters beyond lung heterogeneity in small fields was investigated. All data were obtained using MAGIC, EBT2, and MC in four small field sizes. The maximum local differences between MAGIC and MC were less than 5.1, 3.9, 3.1, and 2.6% for PDD values behind lung heterogeneity at 5, 10, 20, and 30 mm field sizes, respectively. The findings showed that MAGIC is a suitable tool for dosimetry behind low-density heterogeneity. Highlights: The PDDs obtained with MAGIC were in good agreement with the MC calculations. The penumbra increases within the low-density medium compared to soft tissue. The penumbra measured with EBT2 has the smallest value relative to MAGIC and MC.