论文标题
评估超剂量的胸部CT成像，用于19诊断和跟进
Evaluation of Ultra Low Dose chest CT imaging for Covid 19 diagnosis and follow up
论文作者
论文摘要
目的：计算机断层扫描（CT）在检测与Covide相关的肺部病变中具有重要作用。这项工作的目的是获得超低剂量（ULD）胸部CT图像的诊断发现，并与常规剂量胸部CT进行比较。材料和方法：涉嫌与常规剂量和ULD持续扫描的患者，剂量降低了98％或94％。两名专家放射科医生客观地评估了常规和ULD胸部CT的轴向图像，并通过信号与噪声比（SNR）和像素噪声测量进行定量评估。结果：据观察，ULD和常规剂量胸部CT图像可以检测到PCR阳性检测患者的COVID 19相关肺部病变。同样，在这些协议中，SNR和像素噪声值是可比的。结论：降低剂量减少98％的ULD胸部CT可以在非大流行的情况下用作胸部X光片的替代品用于筛查和跟进。常规的胸部CT方案可以用ULD替换为94％的剂量，以检测疑问在早期阶段与Covid 19的患者，并进行随访。
Objective: Computed Tomography (CT) has an important role to detect lung lesion related to Covide 19. The purpose of this work is to obtain diagnostic findings of Ultra-Low Dose (ULD) chest CT image and compare with routine dose chest CT. Material and Methods: Patients, suspected of Covid 19 infection, were scanned successively with routine dose, and ULD, with 98% or 94% dose reduction, protocols. Axial images of routine and ULD chest CT were evaluated objectively by two expert radiologists and quantitatively by Signal to Noise Ratio (SNR) and pixel by pixel noise measurement. Results: It was observed that the ULD and routine dose chest CT images could detect Covid 19 related lung lesions in patients with PCR positive test. Also, SNR and pixel noise values were comparable in these protocols. Conclusion: ULD chest CT with 98% dose reduction can be used in non-pandemic situation as a substitute for chest radiograph for screening and follow up. Routine chest CT protocol can be replaced by ULD, with 94% dose reduction, to detect patients suspected with Covid 19 at an early stage and for its follow up.
