Hetmaniak Y, Bard J J, Albuisson E, Courthaliac C, Reynier C, Lhoste-Trouilloud A, Crost E, Petitcolin V, Caillaud D, Michel J L
Service de Radiologie A, CHU Gabriel Monpied, Clermont- Ferrand.
J Radiol. 2003 Apr;84(4 Pt 1):399-404.
To measure breast radiation dose from multidetector CT using three different low dose protocols and compare it to a standard two view chest examination. To compare the number of pulmonary nodules detected at low and standard dose.
Thermoluminescent dosimetry was used to measure the absorbed dose on a phantom (Rando) and 10 patients. Then, we compared the standard dose to the low dose examinations. The Wilcoxon rank test and the kappa test were used to assess differences in the detection of nodules.
The absorbed dose of these low dose protocols correspond to the radiation dose for the acquisition of two to ten chest radiographs (two views). This study suggests that only the 30 mA protocol is sufficient for the detection of all pulmonary nodules; nodules smaller than 5 mm were overlooked at 10 mA.
A good image quality can be obtained with low dose protocols at multidetector CT (correspond to 2 to 10 chest radiographs).
使用三种不同的低剂量方案测量多排螺旋CT的乳腺辐射剂量，并将其与标准的双视图胸部检查进行比较。比较低剂量和标准剂量下检测到的肺结节数量。
使用热释光剂量测定法测量模型（兰多模型）和10名患者的吸收剂量。然后，我们将标准剂量与低剂量检查进行比较。采用威尔科克森秩和检验和kappa检验来评估结节检测的差异。
这些低剂量方案的吸收剂量相当于获取两到十张胸部X光片（双视图）的辐射剂量。本研究表明，只有30毫安的方案足以检测所有肺结节；在10毫安时，小于5毫米的结节被漏检。
在多排螺旋CT上采用低剂量方案可以获得良好的图像质量（相当于2至10张胸部X光片）。
