Clinical implementation of brass mesh bolus for chest wall postmastectomy radiotherapy and film dosimetry for surface dose estimates
| Autor: | Dilson Lobo, PU Prakash Saxena, Suman Kumar Putha, Sourjya Banerjee, Dinesh Pai Kasturi, Ramamoorthy Ravichandran, Challapalli Srinivas |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Film Dosimetry Materials science Dose profile Breast Neoplasms lcsh:RC254-282 Imaging phantom Brass 03 medical and health sciences 0302 clinical medicine Humans Dosimetry Radiology Nuclear Medicine and imaging Photon beam Radiometry Thoracic Wall Mastectomy Skin Phantoms Imaging business.industry Radiotherapy Planning Computer-Assisted EBT3 film dosimetry Radiotherapy Dosage postmastectomy radiotherapy General Medicine Surgical Mesh lcsh:Neoplasms. Tumors. Oncology. Including cancer and carcinogens Postmastectomy radiation Zinc 030104 developmental biology Oncology 030220 oncology & carcinogenesis visual_art Percentage difference visual_art.visual_art_medium Female Brass mesh bolus Nuclear medicine business surface dose Bolus (radiation therapy) Copper |
| Zdroj: | Journal of Cancer Research and Therapeutics, Vol 15, Iss 5, Pp 1042-1050 (2019) |
| ISSN: | 0973-1482 |
| DOI: | 10.4103/jcrt.jcrt_1034_17 |
| Popis: | Objective: This study presents the dosimetric data taken with radiochromic EBT3 film with brass mesh bolus using solid water and semi-breast phantoms, and its clinical implementation to analyze the surface dose estimates to the chest wall in postmastectomy radiotherapy (PMRT) patients. Materials and Methods: Water-equivalent thickness of brass bolus was estimated with solid water phantom under 6 megavoltage photon beam. Following measurements with film were taken with no bolus, 1, 2, and 3 layers of brass bolus: (a) surface doses on solid water phantom with normal incidence and on curved surface of a locally fabricated cylindrical semi-breast phantom for tangential field irradiation, (b) depth doses (in solid phantom), and (c) surface dose measurements around the scar area in six patients undergoing PMRT with prescribed dose of 50 Gy in 25 fractions. Results: Water-equivalent thickness (per layer) of brass bolus 2.09 ± 0.13 mm was calculated. Surface dose measured by film under the bolus with solid water phantom increased from 25.2% ±0.9% without bolus to 62.5% ± 3.1%, 80.1% ± 1.5%, and 104.4% ± 1.7% with 1, 2, and 3 layers of bolus, respectively. Corresponding observations with semi-breast phantom were 32.6% ± 5.3% without bolus to 96.7% ± 9.1%, 107.3% ± 9.0%, and 110.2% ± 8.7%, respectively. A film measurement shows that the dose at depths of 3, 5, and 10 cm is nearly same with or without brass bolus and the percentage difference is |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
| Nepřihlášeným uživatelům se plný text nezobrazuje | K zobrazení výsledku je třeba se přihlásit. |