#BJR SUPPLEMENT 25 PDF HOW TO#
How to cite this article: Painuly NK, Singh N, Verma TR, Chairmadurai A, Chaudhari LN, Saily A, Pant MC. Keywords: Film dosimetry, inhomogeneity, Monte Carlo simulation In the region of electronic disequilibrium, dose reduction near interface (proximal end) will have negative impact if target region is embedded there, on the contrary, it would be beneficial if there is normal tissue/critical organ adjacent to it. There is a dose build down in the backward region and a dose build up in the forward direction. Results and Discussion: We observed significant variation in dose for smaller fields. Cylindrical geometry is used for all the simulations.
#BJR SUPPLEMENT 25 PDF CODE#
Simulation studies were performed using DOSRZnrc user code that comes with EGSnrc V4 2.4.0. GAFCHROMIC EBT2 dosimetry film was used for the measurement of dose at different locations. Materials and Methods: Low density polyethene foam has been used to mimic air cavity. This study is an attempt to evaluate the dose perturbations produced at the interface of two medium for C0-60 gamma radiation. Heterogeneous structures with spatial differences in functionality and sensitivity for radiation pose challenge to radiation dosimetry. It has been observed that there is dose variation in and around air cavities, which occur as a result of the loss of both longitudinal and lateral electronic equilibrium. Introduction: Accurate dosimetry at the interface of two different density medium (e.g., air cavity in the head and neck cancers and lungs in thoracic region) is a major cause of concern in external beam radiation therapy. Source of Support: None, Conflict of Interest: None Patel Cancer Center, Shree Krishna Hospital and Research Centre, Karamsad, Gujarat, India 4 Associate Professor, Shri Ramswaroop Memorial University, Lucknow, Uttar Pradesh, India 5 Department of Radiotherapy, King George Medical University, Lucknow Vice Chancellor, Hemwati Nandan Bahuguna University, Srinagar, Uttrakhand, India Date of Web PublicationĬorrespondence Address: Nirmal Kumar Painulyĭepartment of Radiotherapy, King George Medical University, Lucknow - 226 003, Uttar Pradesh Nirmal Kumar Painuly 1, Navin Singh 1, Teerth Raj Verma 1, Arun Chairmadurai 2, Lalit Narendra Chaudhari 3, Archana Saily 4, Mohan Chand Pant 5ġ Department of Radiotherapy, King George Medical University, Lucknow, India 2 Department of Radiotherapy, Jaypee Hospital, Noida, Uttar Pradesh, India 3 Medical Physicist, M.S.
Evaluation of dose perturbation at the interface of two different density medium using GAFCHROMIC film EBT2 and Monte Carlo code EGSnrc for Co-60 beam
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