The Use of CT Scanners in Megavoltage Photon-Beam Therapy Planning
- 1 July 1977
- journal article
- research article
- Published by Radiological Society of North America (RSNA) in Radiology
- Vol. 124 (1) , 133-141
- https://doi.org/10.1148/124.1.133
Abstract
Several problems related to the true value of quantitative information from CT [computed tomography] scanners in improving estimates of photon beam isodose distribution remain unanswered. Two widely used correction factors provide satisfactory isodose corrections behind heterogeneities of simple geometry. Lateral perturbations were small for megavoltage photon beams used in treating human tumors, indicating that complex computational schemes are uncalled for. It appears doubtful that the use of CT information in megavoltage photon beam isodose curve generation requires larger computers than those currently available in existing therapy planning systems or on the scanner itself or direct access to the CT numbers.This publication has 3 references indexed in Scilit:
- Performance Evaluation and Quality Assurance of Computed Tomography Scanners, with Illustrations from the EMI, ACTA, and Delta ScannersRadiology, 1976
- Physics of contrast mechanism and averaging effect of linear attenuation coefficients in a computerized transverse axial tomography (CTAT) transmission scannerPhysics in Medicine & Biology, 1976
- The Effect of the kVp Level on EMI ValuesRadiology, 1976