An evaluation of radiation exposure from portal films taken during definitive course of pediatric radiotherapy

International Journal of Radiation Oncology, Biology, Physics
Rajat J KudchadkerRobin M Famiglietti

Abstract

Recently, considerable attention has been directed toward computed tomography radiation doses (estimated 1 to 4 cGy) received by pediatric patients, because of the potential for increasing a pediatric patient's risk for developing a secondary malignancy. However, minimal attention has been given to the radiation exposure outside the treatment field resulting from the use of portal films to visualize surrounding anatomy. The objective of this study was to quantify the radiation dose from portal imaging delivered within and outside the radiation treatment field during a course of radiation therapy. A retrospective review was conducted of the port film dose for 56 consecutive pediatric patients who underwent definitive radiation therapy between January 2001 and January 2002. Treatment locations were classified as brain, 27 patients; abdomen, 11 patients; extremities, 9 patients; pelvis, 6 patients; and thorax, 3 patients. Using the dose per monitor unit and total number of port films taken, the total port film dose for each patient was calculated. In addition, port film dose was quantified for 5 pediatric patients undergoing intensity modulated radiation therapy. The mean total port dose varied from a maximum of 46 cGy for brain t...Continue Reading

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Citations

Dec 17, 2008·Pediatric Radiology·Larry E Kun, Chris Beltran
Apr 1, 2007·Biomedical Imaging and Intervention Journal·P Ravindran
Jan 24, 2007·International Journal of Radiation Oncology, Biology, Physics·Arthur J OlchEric L Chang
Feb 21, 2008·Veterinary Radiology & Ultrasound : the Official Journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association·Margaret C McEntee
Mar 23, 2017·Radiological Physics and Technology·Carina Marques CoelhoMaria de Fátima Monsanto
Jun 27, 2007·Journal of Applied Clinical Medical Physics·Lee-Cheng PengAlex Bielajew

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