Dose distribution to the different organ for various field size (S) using alderson rando phantom for 60 co gamma beam during radiotheraphy in procedure

Abstract

In the present work, dose distribution at d,fferent organs (other than the target organ) for I'arious lield size(s) has been mea,ured by TLD using Alderson Rando Phantom dllTmg radiotherapy treatment procedllTe_Three orgnns such as lung, larynx and the pelvis have been considered as the larget organs. During !lIC treatment of any oflhese threc targct organs it ha, been observed that the nearcst orgons of the target organ bave a hlgh risk in de,-e1oping falal and non-faml cancer. The relative ri,k faclor of the healthy organ or tissuc as well ~s whole body of the cancer patients was obtaIned by applying ICRP-60 (1990) rccommendation_ Proper .,hlddmg techmque should be applied for lhe protection of those risk organ., from lhe leakage and scattered radiatlon Once the relati vc risk factor of the organs are found during the treatment of any wrgd (cancerous) organ then it would he possible to minimiLe thc dose to the other tissuc organs by applying proper shielding or filter and treatmcnt pl~uning will bc more aceuratc. The lesults obtained in tblS sludy would bc helpful for linding out the hIgh risk critical organs with iheir relative rIsk factor for each target organ_