Use of 100 kV versus 120 kV in computed tomography pulmonary angiography in the detection of pulmonary embolism: effect on radiation dose and image quality
Use of 100 kV versus 120 kV in computed tomography pulmonary angiography in the detection of pulmonary embolism: effect on radiation dose and image quality
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DOI：
10.3978/j.issn.2223-4292.2015.04.04
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发表时间：
2015-08-01
影响因子：
2.8
通讯作者：
Sun, Zhonghua
中科院分区：
文献类型：
--
作者：
Gill, Maninderpal Kaur;Vijayananthan, Anushya;Sun, Zhonghua
目的：比较CT肺血管成像(CTPA)患者100和120千伏方案的有效辐射剂量和图像质量。方法：前瞻性研究66例临床怀疑肺栓塞的患者。比较两种CTPA方案(A组：n=33,100kV/115 mAs；B组：n=33,120kV/90 mAs)。两位经验丰富的放射科医生从诊断性能和伪影效果方面对图像质量进行了评估。结果：A组中心动脉和外周动脉的增强明显高于B组(P<0.05)。
Objective: To determine the effective radiation dose and image quality resulting from 100 versus 120 kilovoltage (kV) protocols among patients referred for computed tomography pulmonary angiography (CTPA).Methods: Sixty-six patients with clinical suspicion of pulmonary embolism (PE) were prospectively enrolled. Two CTPA protocols (group A: n=33, 100 kV/115 mAs; group B: n=33, 120 kV/90 mAs) were compared. Two experienced radiologists assessed image quality in terms of diagnostic performance and effect of artefacts. Image quality parameters [CT attenuation, signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR)] and effective radiation dose between the two protocols were compared.Results: The contrast enhancement in central and peripheral pulmonary arteries was significantly higher in group A than in group B (P