Evaluation of off-axis and peripheral dose in LINAC using various detectors

JOINT EVENT: 4^th International Conference and Exhibition on Medical Physics and Biophysics & 2^nd International Conference on Nuclear Medicine & Radiation Therapy

July 27-28, 2017 Rome, Italy

G Bharanidharan, P Aruna, P Thamilkumar, R R Rai and S Ganesan

Anna University, India
Dr. Rai Memorial Cancer Institute, India

Posters & Accepted Abstracts: J Nucl Med Radiat Ther

Abstract :

In radiation therapy, measurement of off-axis and peripheral dose is a tedious task. The dose distribution along the beam central axis give only part of the information required for an accurate dose description inside the patient. Dose distributions in 2-D and 3-D are determined with central axis data in conjunction with off-axis dose profiles. Combining a central axis dose distribution with off-axis data results in volume dose matrix that provides 2-D and 3-D information on dose distribution. The peripheral dose (PD) (dose outside the field edges), is also one of the important parameters when anatomical structures with very low dose tolerances are involved. Hence, knowledge of peripheral dose at distances larger than a few centimeters outside the primary beam is essential from radiation protection point of view. The peripheral radiation dose (PD) may induce cataract formation, affect gonadal function and the fertility. The PD can also be responsible for exposure to the foetus in pregnant woman and dose to breast and other tissues for which radiation induced carcinogenesis may be concerned. Hence the current study evaluates the credentials of detectors viz., MOSFET, ionization chamber, radiographic and radio chromic films for measuring the off axis and peripheral dose.

Biography :

Email: ganesanbharani@gmail.com