This Article Figures Only Full Text Full Text (PDF) Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Kirby, M C Articles by Glendinning, A G Search for Related Content PubMed PubMed Citation Articles by Kirby, M C Articles by Glendinning, A G

Developments in electronic portal imaging systems

North Western Medical Physics, Radiotherapy Department, Rosemere Cancer Centre, Royal Preston Hospital, Preston, UK

Verification of geometric accuracy at the time of treatment delivery has always been a necessary part of the radiotherapy process. Since the introduction of conformal and intensity-modulated radiotherapy, the consequences of patient positioning errors are more serious. Portal imaging has played a large part in fulfilling the need for improved geometric accuracy. This review examines how portal imaging has progressed through the development and evolution of electronic portal imaging devices (EPIDs). Changes in technology, including the current commercial systems, and how image quality has changed are presented. The clinical usage of EPIDs and the technological innovations being devised for further improvements in image quality and systems are considered.

This article has been cited by other articles:

				I PATEL, T NATARAJAN, S S HASSAN, and M C KIRBY The use of computed radiography for routine linear accelerator and simulator quality control Br. J. Radiol., October 1, 2009; 82(982): 827 - 838. [Abstract] [Full Text] [PDF]

				R M HARRISON Doses to organs and tissues from concomitant imaging in radiotherapy: a suggested framework for clinical justification Br. J. Radiol., December 1, 2008; 81(972): 970 - 974. [Abstract] [Full Text] [PDF]