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| Content Provider | Springer Nature Link |
|---|---|
| Author | Rhee, Yong Chun Kim, Dae Hong Lee, Young Jin Kim, Hee Joung |
| Copyright Year | 2014 |
| Abstract | Recently, many studies have investigated the use of a pixelated semiconductor detector to improve spatial resolution. The purpose of this study was to evaluate novel parallel-hole collimator geometric designs with a CdTe pixelated semiconductor single-photon-emission computed tomography (SPECT) system. The pixelated semiconductor detector was modeled as a PID 350 detector (Ajat Oy Ltd., Finland) with small pixels (0.35 × 0.35 mm$^{2}$) by using Geant4 Application for Tomographic Emission (GATE) software. We designed a novel parallel-hole collimator consisting of two overlapping parallel-hole collimators. Each hole size was four times that of the pixelated parallel-hole collimator. The overlap ratios of these collimators were 1:1, 1:2, 2:1, 1:3, 3:1, 1:4, and 4:1. To evaluate the performance of this system, we evaluated the sensitivity and the spatial resolution. The results for our new parallel-hole collimator indicated that the evaluated sensitivity averages using overlap ratios of 1:1, 1:2, 2:1, 1:3, 3:1, 1:4, and 4:1 were 4.45, 7.56, 7.51, 12.76, 12.65, 20.01, and 19.90 times higher, respectively, than those of the pixelated parallel-hole collimator. The evaluated averages of the spatial resolution varied depending on the source-to-collimator distances. In conclusion, we successfully designed a novel parallel-hole collimator with various overlap ratios of the collimator septal heights with a CdTe pixelated semiconductor SPECT system. Based on our results, we recommend using this collimator with a CdTe pixelated semiconductor SPECT system. |
| Starting Page | 1737 |
| Ending Page | 1744 |
| Page Count | 8 |
| File Format | |
| ISSN | 03744884 |
| Journal | Journal of the Korean Physical Society |
| Volume Number | 64 |
| Issue Number | 11 |
| e-ISSN | 19768524 |
| Language | English |
| Publisher | The Korean Physical Society |
| Publisher Date | 2014-06-21 |
| Publisher Place | Seoul |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Single-photon-emission computed tomography (SPECT) Theoretical, Mathematical and Computational Physics Geant4 Application for Tomographic Emission (GATE) simulation Physics Particle and Nuclear Physics Cadmium telluride (CdTe) pixelated semiconductor detector Novel parallel-hole collimator |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physics and Astronomy |
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