TRANSVERSE SLICE RADIOLOGICAL IMAGES ON PAPER USING MARAN TECHNIQUE FOR INVITRO ISODOSE DISTRIBUTION IN RADIOTHERAPY

摘要

The aim of clinical dosimetry of radiotherapy, to determine the perfect target dose likely to control the tumor while limiting the radiation dose on surrounding normal tissue, physical dosimetery of radiotherapy begins with the target dose specified by the clinician and it involves several aspects that are required to determine dose normalization and dose rate viz. A dedicated computerized treatment planning is necessary to view physical dosimetery. The wide spread use of computers and computer graphics combined with extensive utilization of computed tomography and magnetic resonance imaging can be credited for popularity of 3Dimensional treatment planning system. But in practice how radiation dose distribution executed inside patient body is highly challenging option to view directly. In light of this situation maran technique has made useful to access invitro isodose distribution of transverse siice image with perfect optical isodose distribution at the target volume. This technique is single slice transverse image on ordinary white paper detected while patient is on radiotherapy. The accuracy and precision of this technique was compared with patient Computerized Tomogram (CT) scan of particular slice it holds good agreement. The real biological isodose can be visualized easily by using this technique, the existing knowledge has computational graphics but we detected direct image on paper with good optical information of different zone of radiation dosage inside irradiated patient tumour volume, this instrument may be useful to detect cancers and solid tumours. The benefits are to qualitate the dose to target area and to adjoining normal tissues by comparing reference CT slice to verify treatment quality. We presented here two examples of Teletherapy and Brachytherapy treated case images for evaluation of this technique.