| Liu Hui,An Jinggang,Song Ying.SPECT system performance test and analysis of results[J].Chinese Journal of Radiological Medicine and Protection,2015,35(10):767-770 |
| SPECT system performance test and analysis of results |
| Received:September 19, 2014 |
| DOI：10.3760/cma.j.issn.0254-5098.2015.10.011 |
| KeyWords:SPECT NEMA standard Resolution System planar sensitivity |
| FundProject:公益性行业科研专项(201002009) |
| Author Name | Affiliation | | Liu Hui | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | An Jinggang | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | Song Ying | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China |
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| Abstract:: |
| Objective To analyze the influence factors on, and the relationship between, the system performance parameters by testing SPECT equipment. Methods By reference to National Electrical Manufactures Association standards and manufacturer's specifications, the performances of a total of 31 SPECTs in 12 provinces were measured, for the first time, with regard to their system spatial resolution (SSR), system planar sensitivity (SPS) and tomographic spatial resolution (TPR). Results The results were as follows: (7.90±0.62) mm for SSR, with the highest 9.46 mm and the lowest 7.04 mm; (78.54±13.17)s-1·MBq-1 for SPS, with the highest 123.80 s-1·MBq-1 and the lowest 56.70 s-1·MBq-1; and (13.12±2.59) mm for TSR, with the highest 18.13 mm and the lowest 8.45 mm. These values indicated a nearly consistent upward and downward trend and could meet the clinical requirements by comparison with the manufactuer's specifications. Conclusions Mutual restrictions have been shown between SSR and SPS. Increased thickness of the system crystal plane can improve the SPS, but also has a negative impact on the SSR. For all the above reasons, it is the optimum solution to choose the right type of collimator and crystal thickness for different clinical applications. |
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