Research on Reducing Beam Hardening Artifact on Cerebral and Cervical CTA Using
Reducing Dosage of Contrast Medium
LIN Zhisheng1, WANG Jianwei2, DENG Jie1, JI Liya1, ZHAO Yu3
1. Department of Imaging, BenQ Hospital Affiliated to Nanjing Medical University, Nanjing Jiangsu 210000, China;
2. Department of Radiology, The 1st Affiliated Hospital of Nanjing Medical University, Nanjing Jiangsu 210000, China;
3. Department of Medical Imaging, School of Medical Imaging, Nanjing Medical University, Nanjing Jiangsu 210000, China
Abstract：Objective To investigate the elimination of beam hardening artifact by decreasing dosage of contrast agent on cerebral and
cervical CTA. Methods A total of 58 cases undergone cerebral and cervical CTA were divided into 3 groups according to the different
dosage of contrast agent. Group A was injected with 60 mL iodoxanol and 40 mL saline; group B was injected with 50 mL iodoxanol and
50 mL saline; group C was injected with 40 mL iodoxanol and 60 mL saline. CT values of the interested vessels were measured and
compared. In addition, CTA image quality was qualitatively analyzed by two senior radiologists. Results There was no significant
difference (P>0.05) among 3 groups regarding the CT values of the ascending aorta, descending aorta, left common carotid artery, right
common carotid artery, left middle cerebral artery and right middle cerebral artery, while the CT value of subclavian vein in group C was
lower than that in group A (P<0.05) and group B (P<0.05). The beam hardening artifact under the subclavian vein in group C was the least
(P<0.05) while there was no significant difference in image quality among 3 groups (P>0.05). Conclusion Properly
reducing the dosage of contrast agent can improve beam hardening artifact under the subclavian vein on cerebral and cervical CTA.
林智胜1，王建伟2，邓婕1，季丽雅1，赵宇3. 关于降低显影剂剂量消减头颈CTA硬束伪影的研究[J]. 中国医疗设备, 2019, 34(10): 68-71.
LIN Zhisheng1, WANG Jianwei2, DENG Jie1, JI Liya1, ZHAO Yu3. Research on Reducing Beam Hardening Artifact on Cerebral and Cervical CTA Using
Reducing Dosage of Contrast Medium. China Medical Devices, 2019, 34(10): 68-71.
