The impact of adaptive iterative dose reduction 3D on the improvement of shoulder image quality in head and neck CTA

• Published in: Current medical research and opinion 2019-05, Vol.35 (5), p.887-891
• Main Authors: Zhang, Li, Chen, Yue-feng, Che, Yan-xu, Xu, Yan-feng, Zheng, Jing, Yu, Shu-jing
• Format: Article
• Language: English
• Subjects: adaptive iterative dose reduction 3D; Aged; Carotid Artery, Common - diagnostic imaging; Computed Tomography Angiography - methods; contrast-to-noise ratio; CT angiography; Female; Head - diagnostic imaging; Humans; Image Processing, Computer-Assisted; low-radiographic dose; Male; Middle Aged; Neck - diagnostic imaging; Radiation Dosage; Shoulder; Signal-To-Noise Ratio
• ISSN: 0300-7995; 1473-4877
• DOI: 10.1080/03007995.2018.1541446

Objective: The aim of this study was to determine the impact of adaptive iterative dose reduction 3 D (AIDR3D) on the improvement of shoulder image quality in low-radiographic dose head and neck CT angiography (CTA). Materials and methods: Ninety patients who underwent CTA examination were randomly divided into two groups, namely group A (n = 45) and B (n = 45). Patients in group A were scanned under 120 kV and 300 mA, with images reconstructed by filtered back projection (FBP), and patients in group B were scanned under 80 kV and auto mA with images reconstructed by AIDR3D. Image quality was accessed by two experienced radiologists. The noise, signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) of common carotid artery (CCA) at C7 level, and radiation dosage were compared between the two groups. Results: The score of CCA in group B was significantly higher than group A (p  0.05). The score of intracranial artery in group B was lower than that of group A, however, the image quality in group B can meet the requirement of clinical diagnosis. The noise value of CCA at C7 level in group B was significantly lower than that of group A (p