Journal of Medical Physics
 Home | Search | Ahead of print | Current Issue | Archives | Instructions | Subscription | Login  The official journal of AMPI, IOMP and AFOMP      
 Users online: 239  Home  EMail this page Print this page Decrease font size Default font size Increase font size 
Year : 1995  |  Volume : 20  |  Issue : 1  |  Page : 20-23

Assessment Of Energy Parameters Of Different Linear Accelerators Of 6 MV Photons

Correspondence Address:
R Jayaraman

Login to access the Email id

Source of Support: None, Conflict of Interest: None

Rights and PermissionsRights and Permissions

Energy parameters of three linear accelerators manufactured by different companies have been studied. All three machines produce 6 MV X-rays. The energy parameters specified by different manufacturers and different protocols were measured and evaluated. Profile measurements were carried out to find out the quality of the beam in the off-axis. These are affected by the beam production system which are also compared. Relative measurements were carried out using a radiation field analyser and the absolute measurements were carried out using 0.6 cc ion chamber and Baldwin Farmer dosemeter. Generally, the manufacturers of the linear accelerators specify % DD measurements at two different depths one at dmax and the other one at 10 cm depth or the depth at which 50% of the maximum dose occurs. The studies conducted on three different machines indicate that they are within the specifications but less than the quoted nominal energy of 6 MV. Atleast, % DD measurements should be carried out at two different depths one at a smaller depth and the other one at a larger depth. Profile measurements are within the specifications.

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
    PDF Downloaded141    
    Comments [Add]    

Recommend this journal