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| Effects of 3D Smart mA Modulation Technology on Image Acquisition Time, Quality and Radiation Dose of Patients with Different BMI |
| YANG Huiling, ZHANG Shuo, ZHAO Wenzhe, et al |
| The First Affiliated Hospital of Xi'an Jiaotong University, Shaanxi Xi'an 710061, China |
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Abstract Objective: To analyze the effects of 3D smart mA modulation technology on image acquisition time, quality and radiation dose of patients with different body mass index (BMI). Methods: A total of 180 patients undergoing chest CT scans at The First Affiliated Hospital of Xi'an Jiaotong University from June 2021 to December 2022 were selected. Patients were divided into three groups based on BMI: Group A (18.5 kg/m2 ≤ BMI ≤ 23.9 kg/m2, n=75), Group B (23.9 kg/m2 < BMI ≤ 26.9 kg/m2, n=62), and Group C (26.9 kg/m2 < BMI ≤ 30.5 kg/m2, n=43). All patients used 3D smart mA modulation technology, and the image acquisition time, image quality, and radiation dose were compared among the three groups. Results: There was no statistically significant difference in image acquisition time among the three groups (F=2.573, P>0.05). Two physicians evaluated the image quality scores (IQS) of different pulmonary parts, with high consistency (Kappa values=0.768, 0.812, 0.861). There was no statistically significant difference in the IQS scores for different pulmonary parts among the three groups (P>0.05). There were statistically significant differences in CT values of different pulmonary parts among the three groups, and the values decreased with the increase of BMI (P<0.05). There was no statistically significant difference in the standard deviation (SD) of different pulmonary parts, or volume CT dose index (CTDIvol) among the three groups (P>0.05). DLP and ED increased in order from group A, group B to group C (P<0.05). Conclusion: Applying 3D smart mA modulation to patients with different BMI can effectively reduce radiation dose on the premise of ensuring image quality.
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2024, Vol. 30 
