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| Effect of advanced modeled iterative reconstruction on bronchial artery CT imaging in people with different body mass index#br# |
| XU Junfeng, ZHANG Yanan, YIN Jianbing, LIU Jia, MING Jialei, CUI Lei |
（Department of Radiology, the Second Affiliated Hospital of Nantong University, Nantong Jiangsu 226001, China）
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Abstract Objective： To explore the effect of advanced iterative reconstruction algorithm (ADMIRE) on CT imaging of bronchial artery (BA) in people with different body mass index (BMI), and the best iterative reconstruction intensity was screened out. Methods： Fiftyone patients underwent BA CT imaging based on ADMIRE (intensity 1~5). According to BMI, they were divided into underweight group (BMI＜18.5 kg/m2)， normal weight group(18.5 kg/m2≤BMI＜24.0 kg/m2)， overweight group (BMI≥24.0 kg/m2). The BA diameter of the 3 groups and the subjective and objective scores of BA imaging quality under different ADMIRE intensities were compared to screen the optimal iterative reconstruction intensity. Results： There were no significant differences in the diameter of BA and the subjective and objective scores under the same ADMIRE intensity among the 3 groups (P>0.05). The image noise of each group decreased significantly with the increase of ADMIRE intensity, and the signal-to-noise ratio (SNR) and contrast to noise ratio (CNR) of normal weight group and overweight group increased significantly with the increase of ADMIRE intensity. Pair comparison of the same group showed that the SNR of the normal weight group under ADMIRE 5 intensity was statistically different from other iterative intensities and the SNR and CNR of the overweight group under ADMIRE 5 intensity were significantly different from other iterative intensities (P＜0.05). The subjective score of ADMIRE 4 in the overweight group was significantly higher than the iterative intensity of 1-3 (P＜0.05); the subjective scores of ADMIRE 4 and ADMIRE 5 in the normal weight group were similar (P>0 05), but the readability of ADMIRE 4 (96.3%) is higher than that of ADMIRE 5 (92.6%). Conclusion： The diameter of BA was not affected by BMI. ADMIRE 4 and ADMIRE 5 were recommended as the optimal iterative intensity level for displaying BA in the normal weight group and overweight group during BA CT imaging.
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Received: 19 September 2022
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