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Depth dose and off-axis characteristics of TLD in therapeutic pion beams
| Content Provider | Scilit |
|---|---|
| Author | Hogstrom, K. R. Irifune, T. |
| Copyright Year | 1980 |
| Description | Journal: Physics in Medicine & Biology The thermoluminescent (TL) response of LiF (TLD-100, TLD-600, TLD-700) and $Li_{2}B_{4}O_{7}$ (TLD-800) has been measured as a function of depth and off-axis position in a therapeutic negative-pion beam in order to evaluate their usefulness in pion radiotherapy. TLD-100, TLD-600, and TLD-800 have been shown to be of little use as in vivo dosemeters because the neutron kerma relative to that in tissue changes grossly with depth. The neutron source comes primarily from pion absorption in the lead-alloy collimator. The 200 degrees C TLD-700 response agrees well with the depth dose spectra, except for small changes due to the varying linear energy transfer (LET) distributions. This variation can be partially accounted for by incorporating the known LET response of LiF. The 260 degrees C peak of TLD-700 has been found to be approximately four times more sensitive than the 200 degrees C peak to high LET dose. Using a simple model of the LET responses, the measured 200 degrees C and 260 degrees C peaks predict total dose within +or-4% and high LET dose within +or-50%, therefore indicating TLD-700 to be a good in vivo dosemeter for total dose but only an indicator of high LET dose. |
| Related Links | http://iopscience.iop.org/article/10.1088/0031-9155/25/4/005/pdf |
| Ending Page | 676 |
| Page Count | 10 |
| Starting Page | 667 |
| ISSN | 00319155 |
| e-ISSN | 13616560 |
| DOI | 10.1088/0031-9155/25/4/005 |
| Journal | Physics in Medicine & Biology |
| Issue Number | 4 |
| Volume Number | 25 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 1980-07-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: Physics in Medicine & Biology Nuclear Energy and Engineering Depth Dose Pion Beams Response of Lif Vivo Dosemeter |
| Content Type | Text |
| Resource Type | Article |
| Subject | Radiology, Nuclear Medicine and Imaging Radiological and Ultrasound Technology |
