Department of Radiology, Onomichi General Hospital, 1-10-23 Hirahara, Onomichi City, Hiroshima Pref 722-8508, Japan.
Department of Radiological Technology, Faculty of Health Science and Technology, Kawasaki University of Medical Welfare, 288 Matsushima, Kurashiki City, Okayama Pref 701-0193, Japan.
Radiat Prot Dosimetry. 2024 Sep 10;200(14):1358-1364. doi: 10.1093/rpd/ncae174.
We compared the computed tomography (CT) numbers from monochromatic images obtained using the first-generation (Discovery CT750 HD: GE Healthcare, Milwaukee, WI) and second-generation (Revolution CT: GE HealthCare) dual-energy CT (first and second DECT) scanners in phantom and clinical studies. In a polypropylene phantom, eight polypropylene tubes containing iodine at various concentrations (0.5, 1, 2, 5, 10, 12, 20, 30 mg I per ml) were arranged in an outer circle. The iodine densities and CT numbers obtained after imaging with different-generation DECT scanners were analyzed. The CT numbers from images obtained from 61 consecutive patients with aortic disease who underwent CT with different-generation DECT scanners were compared during the arterial and delayed phases. The iodine concentration obtained from second DECT was more accurate than that from the first DECT in the phantom study. A significantly higher contrast enhancement was observed with the second DECT compared with the first DECT during the arterial phase in the clinical study. Contrast enhancement was higher with the second DECT than with the first DECT, and the second DECT was effective in minimizing the use of contrast materials.
我们比较了第一代（Discovery CT750 HD：GE Healthcare，密尔沃基，威斯康星州）和第二代（Revolution CT：GE HealthCare）双能 CT（第一代和第二代 DECT）扫描仪在体模和临床研究中获得的单色图像的 CT 数。在聚丙烯体模中，将八个含有不同浓度碘（0.5、1、2、5、10、12、20、30mgI/ml）的聚丙烯管排列在外圈。分析了使用不同代 DECT 扫描仪成像后获得的碘密度和 CT 数。比较了使用不同代 DECT 扫描仪对 61 例主动脉疾病患者进行 CT 检查的动脉期和延迟期的 CT 数。在体模研究中，第二代 DECT 获得的碘浓度比第一代 DECT 更准确。与第一代 DECT 相比，第二代 DECT 在临床研究的动脉期观察到更高的对比增强。与第一代 DECT 相比，第二代 DECT 的对比增强更高，第二代 DECT 可有效减少造影剂的使用。
