A modified formula for defining tissue phantom ratio of photon beams.
Bangladesh Med Res Counc Bull
;
2007 Dec; 33(3): 92-7
Article
in English
| IMSEAR
| ID: sea-258
ABSTRACT
Tissue phantom ratio (TPR), for square fields of various dimensions has been determined at varying depths in water. The dose in water has been measured at a fixed source-to-surface distance (SSD) of 100 cm and reference depth of 5 cm for 6 MV photon beam of Siemens Linear Accelerator Primus 11 in German Cancer Research Center (DKFZ), Heidelberg, Germany. A modified formula has been developed to calculate the TPR value for isocentric treatment. The present article describes the conversion of the measured data values into a comprehensive and consistent data set by the modified formula, that gives the TPR from Percentage Depth Dose (PDD) with depth as a function of field sizes from 10 mm x 10 mm upto 300 mm x 300 mm) and depth (from 0 mm to 300 mm).
Full text:
Available
Index:
IMSEAR (South-East Asia)
Main subject:
Radiometry
/
Humans
/
Absorptiometry, Photon
/
Photons
/
Phantoms, Imaging
/
Models, Theoretical
Language:
English
Journal:
Bangladesh Med Res Counc Bull
Year:
2007
Type:
Article
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