Home About us Editorial board Ahead of print Current issue Search Archives Submit article Instructions Subscribe Contacts Login 

 
ORIGINAL ARTICLE
Ahead of print publication  

A comparative study for surface dose evaluation in conventional treatment of carcinoma breast patients irradiated with Co-60 and 6 MV radiation beam


1 Department of Radiotherapy, PGIMER; Department of Physics, Panjab University, Chandigarh, India
2 Department of Radiotherapy, PGIMER, Chandigarh, India
3 Department of Physics, Panjab University, Chandigarh, India
4 Department of Nuclear Medicine, PGIMER, Chandigarh, India

Correspondence Address:
Rakesh Kapoor,
Department of Radiotherapy, PGIMER, Chandigarh - 160 012
India
Login to access the Email id

Source of Support: None, Conflict of Interest: None

DOI: 10.4103/jcrt.JCRT_789_17

 > Abstract 


Aim: In the present study, surface doses within the target area and contralateral breast (CLB) received during conventional treatment of carcinoma breast are evaluate and compared for treatment on two different beam energies, i.e., Co-60 γ-ray and 6 MV X-ray beams with thermoluminescent dosimeter, LiF:Mg, Ti (TLD-100).
Materials and Methods: The study includes a group of 23 patients comprising 11 patients treated with Co-60 γ-ray beam and 12 patients by 6 MV X-ray beam.
Results and Discussion: The treatment using Co-60 γ-ray and 6 MV X-ray beams contributes an average percentage dose of 8.15% ± 0.56% and 4.73% ± 0.94%, respectively, to CLB in mastectomy patients. The contribution of tangential fields (mastectomy) to the CLB doses ranges between 12.71 and 16.40 cGy (5.45%–7.03%) for treatment with Co-60 γ-ray beam and 6.33–10.95 cGy (1.86–4.69%) for treatment with 6 MV X-ray beam. The supraclavicular field (SCF) contributes 1.45%–1.93% and 1.02%–1.43% for treatment with Co-60 γ-ray and 6 MV X-ray beams, respectively. The average surface dose (normalized with breast dose) 89.1% ± 8.5% for Co-60 beam in the SCF region differs significantly from the 60.2% ± 13.0% value for 6 MV X-ray beam.
Conclusion: The CLB doses for mastectomy patients are higher for Co-60 beam as compared to 6 MV X-ray beam, and better dose homogeneity is achieved within the irradiated breast from 6 MV X-ray beam. The CLB doses are slightly higher for patients treated with breast conservative radiotherapy or lumpectomy. The average surface dose to SCF decreases by ~30% of treated breast dose for treatment with 6 MV X-ray beam.

Keywords: Breast conservative radiotherapy, contralateral breast, lumpectomy, mastectomy, surface dose, thermoluminescent dosimeter-100



How to cite this URL:
Singh R, Oinam AS, Trivedi G, Kainth HS, Shahi JS, Singh B, Kapoor R. A comparative study for surface dose evaluation in conventional treatment of carcinoma breast patients irradiated with Co-60 and 6 MV radiation beam. J Can Res Ther [Epub ahead of print] [cited 2019 Mar 20]. Available from: http://www.cancerjournal.net/preprintarticle.asp?id=244475

.






 

 
Top
 
 
  Search
 
     Search Pubmed for
 
    -  Singh R
    -  Oinam AS
    -  Trivedi G
    -  Kainth HS
    -  Shahi JS
    -  Singh B
    -  Kapoor R
    Access Statistics
    Email Alert *
    Add to My List *
* Registration required (free)  

  >Abstract
  In this article

 Article Access Statistics
    Viewed224    
    PDF Downloaded5    

Recommend this journal