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Gunnar K. Lund Eckhard Wegian Maythem Saeed Jens Wassermeyer Gerhard Adam Alexander Stork 《European radiology》2009,19(5):1132-1138
Radiation dose and image quality were compared between a standard protocol (40 patients, group A) and a weight-adapted protocol
of voltage and current–time product (44 patients, group B) using 64-slice coronary multidetector computed tomography (MDCT).
Effective dose estimate was lower by 37% in all patients of group B (9.2 ± 2.5 mSv) compared with group A (14.6 ± 2.3 mSv,
P < 0.0001). Group B patients with a small body mass index (BMI) benefited most with a dose reduction of 53% (6.7 ± 1.5 mSv
in group B versus 14.1 ± 1.8 mSv in group A, P < 0.0001). Moderate reductions of 32% and 20% were achieved for patients with a medium and large BMI, respectively. Reduction
in radiation dose did not affect the image quality as assessed by image noise, signal-to-noise ratios, and number of coronary
segments with good diagnostic image quality. Individual weight-adaptation of voltage and current–time product significantly
reduces the radiation dose without loss of image quality. 相似文献
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