BJR
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
First published online January 5, 2009
British Journal of Radiology (2009) 82, 447-451
© 2009 British Institute of Radiology
doi: 10.1259/bjr/23178524
This Article
Right arrow Figures Only
Right arrow Full Text
Right arrow Full Text (PDF)
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Google Scholar
Right arrow Articles by KAWAI, M
Right arrow Articles by INOUE, Y
PubMed
Right arrow PubMed Citation
Right arrow Articles by KAWAI, M
Right arrow Articles by INOUE, Y
British Journal of Radiology 82 (2009),447-451 ©2009 The British Institute of Radiology

Quality of portal verification radiography using EC-L film in electron beam therapy

M KAWAI, MD 1 T TADA, MD 1 M HOSONO, MD 1 Y TAKADA, MD 1 K ISHII, MD 1 T NAGAHATA, RT 1 T SAHARA, RT 2 and Y INOUE, MD 1

1 Department of Radiology, Osaka City University Graduate School of Medicine, 2 Division of Radiological Technology, Osaka City University Hospital, Osaka, Japan

Correspondence: Dr Mieko Kawai, Department of Radiology, Osaka City University Graduate School of Medicine, 1-4-3, Aahi-machi, Abeno-ku, Osaka, 545-8585, Japan. E-mail: radiology{at}med.osaka-cu.ac.jp

The quality of the portal verification radiographs produced using the enhanced-contrast localisation (EC-L) Fast cassette–EC-L film (F-EC) combination and the EC-L Oncology cassette–EC-L film (O-EC) combination was investigated fundamentally and clinically. A computerised radiography (CR) system was used for comparison. In the clinic, portal verification radiographs produced for 22 patients with breast cancer were evaluated. The characteristic curves showed that the relative speed was 0.92 for the O-EC combination when the speed of the F-EC combination was defined to be 1, and that the average gradients were 4.76 and 4.35 for the F-EC combination and the O-EC combination, respectively. The smallest visible volumes of Burger's phantom were 50.3 mm3, 60.8 mm3 and 199.5 mm3 for the F-EC combination, the O-EC combination and the CR system, respectively, at an energy of 9 MeV, and 68.4 mm3, 74.2 mm3 and 195 mm3, respectively, at an energy of 12 MeV. In the clinic, both combinations at an energy of 6 MeV and the O-EC combination at 9 MeV showed very poor quality owing to underdensity. However the F-EC combination at an energy of 12 MeV and the O-EC combination at an energy of 15 MeV demonstrated a higher quality. When bremsstrahlung dose passing through the body is sufficient, the quality of portal verification radiography using EC-L film is appropriate for clinical use.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
BJR DMFR IMAGING  ALL BIR JOURNALS 
Copyright © 2009 by the British Institute of Radiology.