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: 311  Home  EMail this page Print this page Decrease font size Default font size Increase font size 
TECHNICAL NOTE
Year : 2011  |  Volume : 36  |  Issue : 3  |  Page : 171-175

Relative dosimetrical verification in high dose rate brachytherapy using two-dimensional detector array IMatriXX


1 Department of Radiation Oncology, Narayana Hrudayalaya, Bangalore, India
2 Department of Radiation Oncology, AMRI Hospitals, Kolkata, India
3 Department of Radiation Oncology, Jupiter Hospital, Mumbai, India
4 Department of Radiotherapy, GGH, Guntur, India

Correspondence Address:
A Manikandan
Medical Physicist, Mazumdar Shaw Cancer Centre, Narayana Hrudayalaya, Bangalore-560099, Karnataka
India
Login to access the Email id

Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0971-6203.83491

Rights and Permissions

For high dose rate (HDR) brachytherapy, independent treatment verification is needed to ensure that the treatment is performed as per prescription. This study demonstrates dosimetric quality assurance of the HDR brachytherapy using a commercially available two-dimensional ion chamber array called IMatriXX, which has a detector separation of 0.7619 cm. The reference isodose length, step size, and source dwell positional accuracy were verified. A total of 24 dwell positions, which were verified for positional accuracy gave a total error (systematic and random) of −0.45 mm, with a standard deviation of 1.01 mm and maximum error of 1.8 mm. Using a step size of 5 mm, reference isodose length (the length of 100% isodose line) was verified for single and multiple catheters of same and different source loadings. An error ≤1 mm was measured in 57% of tests analyzed. Step size verification for 2, 3, 4, and 5 cm was performed and 70% of the step size errors were below 1 mm, with maximum of 1.2 mm. The step size ≤1 cm could not be verified by the IMatriXX as it could not resolve the peaks in dose profile.


[FULL TEXT] [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
 Related articles
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)
 

 Article Access Statistics
    Viewed2482    
    Printed115    
    Emailed2    
    PDF Downloaded174    
    Comments [Add]    
    Cited by others 2    

Recommend this journal