Journal of Medical Physics
 Home | Search | Ahead of print | Current Issue | Archives | Instructions | Subscription | Login  The official journal of Association of Medical Physicists of India      
 Users online: 731  Home  EMail this page Print this page Decrease font size Default font size Increase font size 
Year : 1997  |  Volume : 22  |  Issue : 4  |  Page : 169-194

Surface Dose Measurements Using Parallel Plate Markus Chamber For 60co, 6 & 10 MV Photon Beams



Correspondence Address:
HK Malhotra


Login to access the Email id

Source of Support: None, Conflict of Interest: None


Rights and PermissionsRights and Permissions

Fixed volume parallel plate ion chambers are commonly employed for surface dose measurement purposes as the much desired extrapolation chambers are rarely available in a department. They, however, overestimate the surface doses by an appreciable amount, sometimes as much as a factor of 2, and needs careful consideration before using measured data for clinical dosimetry. Surface dose measurements were carried out for 60Co, 6 and 10 MV photon beams using a PTW Markus parallel plate chamber as well as UF TLD powder. The Markus chamber was found to over-response the surface dose measurements by 18.7%, 10.6% and 6.7% in absolute terms for 6 0co, 6 and 10 MV, respectively, which is in conformity with the available literature.


[PDF]*
Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)
 

 Article Access Statistics
    Viewed743    
    Printed45    
    Emailed0    
    PDF Downloaded174    
    Comments [Add]    

Recommend this journal