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- Title
Organ dose evaluation for multi-slice spiral CT scans based on China Sichuan chest anthropomorphic phantom measurements.
- Authors
Peng, Gang; Zeng, Yongming; Luo, Tianyou; Zhao, Feng; Peng, Shengkun; You, Renqiang; Tan, Hua; Liu, Xiao; Wang, Jie
- Abstract
The authors measured organ radiation doses during multi-slice computed tomography (MSCT) chest scans using a China Sichuan anthropomorphic phantom (CDP-1C). Chest CT images from live volunteers based on automatic tube current modulation (ATCM) techniques were similar to those obtained using the CDP-1C phantom, indicating that the phantom accurately modelled the anatomic structure and X-ray absorbance of the human torso. Indeed, attenuation values differed by <5 %. Organ radiation doses were measured using thermoluminescence dosemeters in the CDP-1C. With increased noise index, the CT dose index, the dose-length product and the average organ dose all decreased. Thus, the CDP-1C phantom can also assess dose levels during CT examinations in Chinese patients. The noise index (based on ATCM techniques) should be set to 8.5 or higher to reduce X-ray exposure while maintaining appropriate resolution for diagnosis.
- Subjects
SICHUAN Sheng (China); CHINA; IMAGING phantoms; TOMOGRAPHY; CHEST examination; THERMOLUMINESCENCE; RADIATION dosimetry; TORSO
- Publication
Radiation Protection Dosimetry, 2012, Vol 150, Issue 4, p292
- ISSN
0144-8420
- Publication type
Article
- DOI
10.1093/rpd/ncr403