Isodose distributions in intracavitary radiotherapy of cervical carcinoma

It is very important to obtain the dose distributions of tissues in pelvic cavity for increasing therapy effects and protecting normal tissues and organs in the irradiated volume in intracavitary radiotherapy of cervical carcinoma. A nonuniform tissue equivalent anthropomorphic phantom of female hip was used in experimental measurements. For instance, to two clinical therapy plants the isodose distributions in the para-cervical and sagittal plane through the bladder and rectum have been measured with a Buchler after-loading equipment. The theoretical computations for one of two plans above with Monte Carlo method have obtained the isodose curves in the para-cervical plane. For dose rate at point 'A' (the tolerance dose point), the maximum error of measurement is 5.4%, compared with the ISO curves, the relative deviation between the two values is 3.0%, the statistics error of theoretical value is 4.0%, the theoretical result is in agreement within 5% with that obtained experimentally