Nuclear Medicine & Radiation Therapy

Pranav Chadha

Publications

• Research Article
  Dosimetric Comparison of a-Si 1200 and a-Si 1000 Electronic Portal Imager for Intensity Modulated Radiation Therapy (IMRT)
  Author(s): Vaibhav Mhatre, Shaju Pilakkal, Pranav Chadha and Kaustav TalpatraVaibhav Mhatre, Shaju Pilakkal, Pranav Chadha and Kaustav Talpatra
  
  Aim: This study investigates the dosimetric impact of a-Si 1200 over a-Si 1000 portal imager for 6 MV photon beam of a Varian Amorphous Silicon Electronic Portal Imaging Device (a-Si EPID) installed on Edge and Novalis TxLinac. Materials and Methods: The performance of an a-Si EPID 1200 was assessed and compared to its performance with a-Si EPID 1000 and dose measurements using an ionization chamber. This study was conducted for 6MV photon energy and the EPID performance was assessed as function of the delivered dose, dose rate, field size, SDD effect, Ghosting effect, Backscatter arm shielding impact and intensity-modulated radiation therapy fields. Results: The dose response for a-Si 1200 was within 0.5% for low MU (2-10) as compared to 1.4% for a-Si 1000 portal imager and less than 1% for both the imager above 10 MU. .. Read More»
  DOI: 10.4172/2155-9619.1000354

  Abstract PDF