Organ dose evaluation for multi-slice spiral CT scans based on China Sichuan chest anthropomorphic phantom measurements.
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.
Department of Radiology,  The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016,  China.
Gang
G
Peng
Yongming
Y
Zeng
Tianyou
T
Luo
Feng
F
Zhao
Shengkun
S
Peng
Renqiang
R
You
Hua
H
Tan
Xiao
X
Liu
Jie
J
Wang
D000328:Adult; D002681:China; D003430:Cross-Sectional Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D019047:Phantoms, Imaging; D011829:Radiation Dosage; D011835:Radiation Protection; D013902:Radiography, Thoracic; D013819:Thermoluminescent Dosimetry; D036542:Tomography, Spiral Computed; D055815:Young Adult