Dose and image quality at CT pulmonary angiography-comparison of first and second generation dual-energy CT and 64-slice CT

被引：51
作者：
Bauer, Ralf W. [1 ]
Kramer, Sebastian [1 ]
Renker, Matthias [1 ]
Schell, Boris [1 ]
Larson, Maya Christina [1 ]
Beeres, Martin [1 ]
Lehnert, Thomas [1 ]
Jacobi, Volkmar [1 ]
Vogl, Thomas J. [1 ]
Kerl, Josef Matthias [1 ]
机构：
[1] Clin Goethe Univ, Dept Diagnost & Intervent Radiol, D-60590 Frankfurt, Germany
来源：
EUROPEAN RADIOLOGY | 2011年 / 21卷 / 10期
关键词：
Dual-energy CT; 64-slice CT; Pulmonary embolism; Dose; Image quality; COMPUTED-TOMOGRAPHY ANGIOGRAPHY; ACUTE CORONARY SYNDROME; RADIATION-EXPOSURE; LUNG PERFUSION; EMBOLISM; DIAGNOSIS; FEASIBILITY; MANAGEMENT; SETTINGS; SOCIETY;
D O I：
10.1007/s00330-011-2162-y
中图分类号：
R8 [特种医学]; R445 [影像诊断学];
学科分类号：
1002 ; 100207 ; 1009 ;
摘要：
Objective To compare dose and image quality of 64-slice, first and second generation dual-energy CT (DECT) for CT pulmonary angiography (CTPA). Methods Totally 120 patients, 30 in each group, underwent CTPA on a first generation (group 1: single-energy, 120 kV/145 mAs; group 2: DE, 140/80 kV, 70/350 mAs) or second generation dual-source DECT device (group 3: DE, 100/Sn140 kV, 120/102 mAs; group 4: DE, 80/Sn140 kV, 202/86 mAs). CTDIvol, DLP, background noise (BN), thorax diameter and attenuation in the pulmonary trunk were compared. Results Thorax diameter and attenuation in the pulmonary trunk did not differ significantly (p > 0.4 and > 0.19) between the groups. Mean CTDIvol and DLP were significantly lower (p < 0.003) in group 4 (6.2 +/- 1.6 mGy/170 +/- 41 mGycm) compared to group 1 (8.5 +/- 2.6 mGy/235 +/- 117 mGycm), group 2 (9.2 +/- 3.3 mGy/224 +/- 122 mGycm) and group 3 (8.7 +/- 2.8 mGy/246 +/- 86 mGycm). BN was significantly lower (p < 0.0001) in group 4 (12 +/- 3 HU) and group 1 (13 +/- 6 HU) compared to group 3 and 2 (16 +/- 6 HU and 23 +/- 9). Conclusion The use of second generation DECT in 80/Sn140 kV configuration allows for significant dose reduction with image quality similar to 120 kV CTPA.
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页码：2139 / 2147
页数：9
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