光子计数探测器 CT 对腹主动脉勾画的研究。
Investigation of abdominal artery delineation by photon-counting detector CT.
机构信息
Department of Diagnostic and Interventional Radiology, Osaka University Graduate School of Medicine, D1, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan.
Department of CT Research and Collaboration, Siemens Healthineers, Tokyo, Japan.
出版信息
Radiol Med. 2024 Sep;129(9):1265-1274. doi: 10.1007/s11547-024-01858-z. Epub 2024 Jul 24.
OBJECTIVES
To evaluate the ability of 50-keV virtual monoenergetic images (VMI) to depict abdominal arteries in abdominal CT angiography (CTA) compared with 70-keV VMI with photon-counting detector CT (PCD-CT).
METHODS
Fifty consecutive patients who underwent multiphase abdominal scans between March and April 2023 were included. Signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) were quantitatively assessed for the abdominal aorta (AA), celiac artery (CeA), superior mesenteric artery (SMA), renal artery (RA), and right hepatic artery (RHA) at both 50- and 70-keV VMI. In addition, 3D images from CTA were analyzed to measure arterial lengths and evaluate the visualization of distal branches.
RESULTS
Significantly higher SNR and CNR were observed at 50-keV compared to 70-keV VMI for all arteries: AA (36.54 and 48.28 vs. 25.70 and 28.46), CeA (22.39 and 48.38 vs. 19.09 and 29.15), SMA (23.34 and 49.34 vs. 19.67 and 29.71), RA (22.88 and 48.84 vs. 20.15 and 29.41), and RHA (14.38 and 44.41 vs. 13.45 and 27.18), all p < 0.05. Arterial lengths were also significantly longer at 50-keV: RHA (192.6 vs. 180.3 mm), SMA (230.9 vs. 216.5 mm), and RA (95.9 vs. 92.0 mm), all p < 0.001.
CONCLUSION
In abdominal CTA with PCD-CT, 50-keV VMI demonstrated superior quantitative image quality compared to 70-keV VMI. In addition, 50-keV VMI 3D CTA allowed better visualization of abdominal artery branches, highlighting its potential clinical advantage for improved imaging and detailed assessment of abdominal arteries.
目的
评估 50keV 虚拟单能量图像（VMI）在腹部 CT 血管造影（CTA）中描绘腹部动脉的能力，与光子计数探测器 CT（PCD-CT）的 70keV VMI 进行比较。
方法
纳入 2023 年 3 月至 4 月期间进行多期腹部扫描的连续 50 例患者。定量评估腹部主动脉（AA）、腹腔动脉（CeA）、肠系膜上动脉（SMA）、肾动脉（RA）和右肝动脉（RHA）在 50keV 和 70keV VMI 下的信噪比（SNR）和对比噪声比（CNR）。此外，还分析 CTA 的 3D 图像以测量动脉长度并评估远端分支的可视化。
结果
与 70keV VMI 相比，所有动脉在 50keV VMI 下的 SNR 和 CNR 均显著更高：AA（36.54 和 48.28 与 25.70 和 28.46）、CeA（22.39 和 48.38 与 19.09 和 29.15）、SMA（23.34 和 49.34 与 19.67 和 29.71）、RA（22.88 和 48.84 与 20.15 和 29.41）和 RHA（14.38 和 44.41 与 13.45 和 27.18），所有 p 值均<0.05。动脉长度在 50keV 下也显著更长：RHA（192.6 与 180.3 mm）、SMA（230.9 与 216.5 mm）和 RA（95.9 与 92.0 mm），所有 p 值均<0.001。
结论
在 PCD-CT 腹部 CTA 中，与 70keV VMI 相比，50keV VMI 显示出更高的定量图像质量。此外，50keV VMI 3D CTA 可更好地显示腹部动脉分支，突出了其在改善成像和详细评估腹部动脉方面的潜在临床优势。
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