[Home ] [Archive]    
:: Main :: About :: Current Issue :: Archive :: Search :: Submit :: Contact ::
:: Volume 8, Issue 2 (9-2010) ::
Int J Radiat Res 2010, 8(2): 93-101 Back to browse issues page
Evaluation of the physical characteristic of Cerrobend blocks used for radiation therapy
A. Taherkhani, M. Mohammadi , M.S. Saboori, V. Changizi
, mohammadi@umsha.ac.ir
Abstract:   (14912 Views)
Background: In Radiation Therapy, the sparing of normal tissues can be performed using either multi-leaf collimators or Cerrobend blocks. The current work focuses on the physical characteristics of Cerrobend blocks including attenuation coefficient, effective penumbra width and isodose curves undulation in penumbral regions. Materials and Methods: All measurements were performed using a dual energy linac and the Cerrobend blocks designed and fabricated using a commercial Cerrobend material. Data were collected using a calibrated ionization chamber as well as EDR2 films. Results: The results showed that the attenuation coefficient was found to be 0.4475 and 0.4276 cm-1 for photon beams 6MV and 15 MV, respectively, and a potential air bubble with a diameter greater than 3 mm affects beam attenuation significantly. The optimum Cerrobend block width was found to be around 16 mm. The isodose curves scalloping achieved for secondary collimator jaws, were also similar. Conclusion: If Cerrobend blocks are used as a basic method to protect normal tissues, its physical characteristics will be recommended to be taken into account comprehensively. Iran. J. Radiat. Res., 2010 8 (2): 93-101
Keywords: Beam collimation, block-cutter, Cerrobend blocks, shielding.
Full-Text [PDF 1026 kb]   (9344 Downloads)    
Type of Study: Original Research | Subject: Medical Physics
Send email to the article author

Add your comments about this article
Your username or Email:

CAPTCHA


XML     Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Taherkhani A, Mohammadi M, Saboori M, Changizi V. Evaluation of the physical characteristic of Cerrobend blocks used for radiation therapy. Int J Radiat Res. 2010; 8 (2) :93-101
URL: http://ijrr.com/article-1-622-en.html


Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Volume 8, Issue 2 (9-2010) Back to browse issues page
International Journal of Radiation Research
Persian site map - English site map - Created in 0.05 seconds with 32 queries by YEKTAWEB 4343