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Technical Note: Out-of-field dose measurement at near surface with plastic scintillator detector
| Content Provider | Scilit |
|---|---|
| Author | Bourgouin, Alexandra Varfalvy, Nicolas Archambault, Louis |
| Copyright Year | 2016 |
| Description | Journal: Journal of applied clinical medical physics Out‐of‐field dose depends on multiple factors, making peripheral dosimetry complex. Only a few dosimeters have the required features for measuring peripheral dose. Plastic scintillator dosimeters (PSDs) offer numerous dosimetric advantages as required for out‐of‐field dosimetry. The purpose of this study is to determine the potential of using PSD as a surface peripheral dosimeter. Measurements were performed with a parallel‐plate ion chamber, a small volume ion chamber, and with a PSD. Lateral‐dose measurements (LDM) at 0.5 cm depth and depth‐dose curve (PDD) were made and compared to the dose calculation provided by a treatment planning system (TPS). This study shows that a PSD can measure a dose as low as 0.51±0.17cGy for photon beam and 0.58±0.20cGy for electron beam with a difference of 0.2 and 0.1 cGy compared to a parallel‐plate ion chamber. This study demonstrates the potential of using PSD as an out‐of‐field dosimeter since measurements with PSD avoid averaging over a too‐large depth, at 1 mm diameter, and can make precise measurement at very low dose. Also, electronic equilibrium is easier to reach with PSD due to its small sensitive volume and its water equivalence. |
| Related Links | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5874086/pdf |
| Ending Page | 547 |
| Page Count | 6 |
| Starting Page | 542 |
| e-ISSN | 15269914 |
| DOI | 10.1120/jacmp.v17i5.6308 |
| Journal | Journal of applied clinical medical physics |
| Issue Number | 5 |
| Volume Number | 17 |
| Language | English |
| Publisher | Wiley-Blackwell |
| Publisher Date | 2016-09-08 |
| Access Restriction | Open |
| Subject Keyword | Journal: Journal of applied clinical medical physics Radiology, Nuclear Medicine and Imaging Plastic Scintillation Detector Out‐of‐field Dosimetry Peripheral Dose Parallel‐plate Ion Chamber Surface Dose |
| Content Type | Text |
| Resource Type | Article |
