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| The application value of low dose CT scanning technology in CTA of head and neck |
| LI Fei-fei, JIN Biao, ZOU Ming, ZHANG Hai-bing, LI Jun, WANG Yong-jie |
| Department of Radiology, Chongming Branch of Xinhua Hospital Affiliated toShanghai Jiaotong University, Shanghai 202150, China |
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Abstract Objective: To discuss the value of clinical application of low dose CT angiography(CTA) (low voltage) in head and neck. Methods: Fifty-five adults(BMI<22.9 kg/m2) underwent 64-row head and neck CTA examinations. They were randomly divided into two groups that is those using conventional dose(120 kV, 175 mA) and those using low dose(80 kV, 175 mA) scanning protocols, respectively. InSpace, Neuro DSA, 3D image software were used for postprocessing. Image quality and diagnostic value of the two groups were assessed, the chi-square test was used for statistical comparison of the two groups. The radiation dose of the two groups were also recorded. Results: The results showed that the quality of routine dose image is slightly higher than that of low dose group, but with no statistical significance(P>0.05). In the low dose group, the image particles were slightly rough, but did not affect diagnosis, there was no statistical significance(P>0.05). The BMI of the two groups showed no statistical significance(P>0.05). Radiation dose received by low dose group was lower than that of conventional dose group significantly with CTDlvol and DLP decreased 71.22% and 72.03%, respectively. In each of the two groups, there was 1 case which image quality was poor, respectively, was due to technical factors through investigation, was included as the research category. Conclusion: Low dose CTA scanning technique can be applied for head and neck vascular lesions including plaque screening, vascular stenotic degree evaluation before and after stent implantation. Meanwhile, it can greatly reduce the radiation dosage received by the patients.
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Received: 19 June 2013
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Corresponding Authors:
JIN Biao
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2013, Vol. 24 
