Deep learning reconstruction allows low-dose imaging while maintaining image quality: comparison of deep learning reconstruction and hybrid iterative reconstruction in contrast-enhanced abdominal CT
Deep learning reconstruction allows low-dose imaging while maintaining image quality: comparison of deep learning reconstruction and hybrid iterative reconstruction in contrast-enhanced abdominal CT
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DOI：
10.21037/qims-21-1216
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发表时间：
2022-02-09
影响因子：
2.8
通讯作者：
Yoshioka, Kunihiro
中科院分区：
文献类型：
--
作者：
Tamura, Akio;Mukaida, Eisuke;Yoshioka, Kunihiro
我们旨在比较使用深度学习重建（DLR）重建的低剂量腹部计算机断层扫描（CT）方案与使用混合迭代重建重建的常规剂量方案的辐射剂量和图像质量。该回顾性研究入组了71名患者[61名男性;平均年龄71.9岁;平均体重指数（BMI）24.3 kg/m2]，这些患者接受了低剂量腹部CT和DLR [高级智能clear-IQ引擎（AiCE）]以及常规剂量腹部CT和混合迭代重建[自适应迭代剂量减少3D（AIDR 3D）]。辐射剂量参数包括体积CT剂量指数（CTDIvol）、有效剂量（艾德）和尺寸特异性剂量估计（SSDE）。计算平均图像噪声和对比噪声比（CNR）。在肝实质和双侧竖脊肌中测量图像噪声。此外，主观评价的感知图像质量和诊断的可接受性。低剂量方案帮助CTDIvol降低44.3%，艾德降低43.7%，SSDE降低44.9%。低剂量组噪声明显低于正常剂量组，CNR明显高于正常剂量组（P
We aimed to compare the radiation dose and image quality of a low-dose abdominal computed tomography (CT) protocol reconstructed with deep learning reconstruction (DLR) with those of a routine-dose protocol reconstructed with hybrid-iterative reconstruction. This retrospective study enrolled 71 patients [61 men; average age, 71.9 years; mean body mass index (BMI), 24.3 kg/m(2)] who underwent both low-dose abdominal CT with DLR [advanced intelligent clear-IQ engine (AiCE)] and routine-dose abdominal CT with hybrid-iterative reconstruction [adaptive iterative dose reduction 3D (AIDR 3D)]. Radiation dose parameters included volume CT dose index (CTDIvol), effective dose (ED), and size-specific dose estimate (SSDE). Mean image noise and contrast-to-noise ratio (CNR) were calculated. Image noise was measured in the hepatic parenchyma and bilateral erector spinae muscles. Moreover, subjective assessment of perceived image quality and diagnostic acceptability was performed. The low-dose protocol helped reduce the CTDIvol by 44.3%, ED by 43.7%, and SSDE by 44.9%. Moreover, the noise was significantly lower and CNR significantly higher with the low-dose protocol than with the normal-dose protocol (P