Calculation of Tissue-Air Ratios(TAR) in Irregularly shaped Field for Co-60 Gamma Radiation
Creators
- 1. Dept. of Therapetic Radiology, Kangnam General Hospital, Seoul (Korea, Republic of)
Description
In order to calculate the dose on each interest point in five types of irregularly shaped fields used commonly in radiotherapy, the tissue-air ratios (TAR) in these fields for Go-60 gamma radiation were calculated using the newly devised SAR-chart. The TARs calculated from newly method of using the SAR-chart, computer method and approximation method at the interest point were compared to the TARs obtained from measurement. The result are as follows; In case of the interest points on central axis the calculated TARs in irregularly shaped fields by the above mentioned methods were well agreed within the error of , whereas for the interest points on off-axis the calculated TARs were resulted in the maximum errors of and respectively. From these results, the accuracy of calculation method of using the SAR-chart was confirmed.
Additional details
Publishing Information
- Journal Title
- Journal of the Korean Society for Radiotherapeutic Technology
- Journal Volume
- 3
- Journal Issue
- 1
- Series
- 9 refs, 6 figs, 4 tabs
- Journal Page Range
- p. 27-36
- ISSN
- 1598-8449
INIS
- Country of Publication
- Korea, Republic of
- Country of Input or Organization
- Korea, Republic of
- INIS RN
- 43115841
- Subject category
- S62: RADIOLOGY AND NUCLEAR MEDICINE;
- Descriptors DEI
- COBALT 60; COMPUTER CALCULATIONS; DIAGNOSIS; GAMMA RADIATION; PATIENTS; RADIOTHERAPY
- Descriptors DEC
- BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; COBALT ISOTOPES; ELECTROMAGNETIC RADIATION; INTERMEDIATE MASS NUCLEI; INTERNAL CONVERSION RADIOISOTOPES; IONIZING RADIATIONS; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; MEDICINE; MINUTES LIVING RADIOISOTOPES; NUCLEAR MEDICINE; NUCLEI; ODD-ODD NUCLEI; RADIATIONS; RADIOISOTOPES; RADIOLOGY; THERAPY; YEARS LIVING RADIOISOTOPES