Application of 320-Slice CT “Double–Low” Technique in Head and Neck CTA
WANG Rui1, LI Hengguo2
1. Department of Radiology, Guangzhou Women and Children’s Medical Center, Guangzhou Guangdong 510623, China; 2. Medical
Imaging Center, The First Affiliated Hospital of Jinan University, Guangzhou Guangdong 510632, China
Abstract：Objective To investigate the application of head-and-neck CT angiography using a low tube voltage and low
concentrations of contrast agent compared with normal dose and high concentration of contrast agent with 320-row volume
CT. Methods Sixty adult patients were collected underwent the head and neck CT angiography. The patients were randomly
assigned to group A (120 kV, 370 mgI/mL), B (100 kV, 370 mgI/mL), and C (80 kV, 300 mgI/mL). All three groups adopted
automatic tube current regulation technology and iterative reconstruction algorithm. Then the image quality, radiation dose and
iodine intake were compared among the three groups. Results The degree of enhancement in group C was higher than group A
and B with significant difference; The image noise in group C was higher than A and B with significant difference; The difference of
background noise, SNR and CNR among the three groups was not statistically significan; The difference of the score evaluated from
the images was not statistically significant between subjective and objective method in all the three groups. Conclusion Through
technical optimization and reasonable parameter selection, 320-slice volume CT using "double low" technology can be
applied to the head and neck CTA examination without affecting the image quality, and effectively reduce the radiation dose.
王芮1
，李恒国2. 320排容积CT“双低”技术在头颈部CTA中的应用[J]. 中国医疗设备, 2019, 34(5): 77-81.
WANG Rui1, LI Hengguo2. Application of 320-Slice CT “Double–Low” Technique in Head and Neck CTA. China Medical Devices, 2019, 34(5): 77-81.
