Reduction of Peristalsis-Related Streak Artifacts on the Liver with Dual-Layer Spectral CT.
Reduction of Peristalsis-Related Streak Artifacts on the Liver with Dual-Layer Spectral CT.
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DOI：
10.3390/diagnostics12040782
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发表时间：
2022-03-23
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影响因子：
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背景：肝脏上与蠕动相关的条纹伪影损害了图像质量和诊断准确性。目的：评价双层光谱检测器计算机断层扫描（CT）图像重建对减少肝脏肠蠕动相关条纹伪影的作用。方法：我们回顾性评价连续131例患者（平均年龄：68±10岁，男性120例）的220次增强腹部双能CT扫描，这些患者接受了常规临床双层光谱探测器CT成像（120 kVp, 40 keV, 200 keV，虚拟无对比（VNC），碘图像）。两名独立的读者通过李克特五分制（1 =无至5 =严重）对肝脏上的肠蠕动条纹伪像进行了定性评估，并通过条纹伪像延伸到肝脏的深度、霍斯菲尔德单位和碘浓度与正常肝脏的差异进行了定量评估。图像重建之间的伪影严重程度采用Wilcoxon符号秩和配对t检验进行比较。结果：12次扫描由于光谱数据缺失、金属异物或口服造影剂引起的肝脏伪影而被排除。肝脏条纹伪影在51/208（25%）扫描中可见，仅在49/51（96%）扫描中可见左叶，仅在0/51（0%）扫描中可见右叶，在2/51（4%）扫描中可见双叶。碘图像的伪影频率低于120 kVp图像（扫描18/208 vs 51/208， p < 0.001）。碘组的伪影严重程度低于120 kVp组（中位评分1比3，p < 0.001）。碘显像的条纹伪影延伸到肝脏的时间比120 kVp显像短（平均长度为2±4比12±5 mm， p < 0.001）。在120 kVp、40 keV、200 keV和VNC图像中，亮条伪影与正常肝脏的Hounsfield单位和碘浓度差异显著（p < 0.001），但在碘图像中无差异（p = 0.23）。结论：肠蠕动相关条纹伪影常在CT上影响左肝叶，可通过碘双能CT图像重建大幅降低。
Background: Peristalsis-related streak artifacts on the liver compromise image quality and diagnostic accuracy. Purpose: To assess dual-layer spectral-detector computed tomography (CT) image reconstructions for reducing intestinal peristalsis-related streak artifacts on the liver. Methods: We retrospectively evaluated 220 contrast-enhanced abdominal dual-energy CT scans in 131 consecutive patients (mean age: 68 ± 10 years, 120 men) who underwent routine clinical dual-layer spectral-detector CT imaging (120 kVp, 40 keV, 200 keV, virtual non-contrast (VNC), iodine images). Two independent readers evaluated bowel peristalsis streak artifacts on the liver qualitatively on a five-point Likert scale (1 = none to 5 = severe) and quantitatively by depth of streak artifact extension into the liver and measurements of Hounsfield Unit and iodine concentration differences from normal liver. Artifact severity between image reconstructions were compared by Wilcoxon signed-rank and paired t-tests. Results: 12 scans were excluded due to missing spectral data, artifacts on the liver originating from metallic foreign materials, or oral contrast material. Streak artifacts on the liver were seen in 51/208 (25%) scans and involved the left lobe only in 49/51 (96%), the right lobe only in 0/51 (0%), and both lobes in 2/51 (4%) scans. Artifact frequency was lower in iodine than in 120 kVp images (scans 18/208 vs. 51/208, p < 0.001). Artifact severity was less in iodine than in 120 kVp images (median score 1 vs. 3, p < 0.001). Streak artifact extension into the liver was shorter in iodine than 120 kVp images (mean length 2 ± 4 vs. 12 ± 5 mm, p < 0.001). Hounsfield Unit and iodine concentration differed significantly between bright streak artifacts and normal liver in 120 kVp, 40 keV, 200 keV, and VNC images (p < 0.001, each), but not in iodine images (p = 0.23). Conclusion: Intestinal peristalsis-related streak artifacts commonly affect the left liver lobe at CT and can be substantially reduced by viewing iodine dual-energy CT image reconstructions.
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DOI：
10.1177/028418518402500408
发表时间：
1984-01-01
期刊：
ACTA RADIOLOGICA-DIAGNOSIS
影响因子：
--
作者：
PARTANEN, K;KORMANO, M
通讯作者：
KORMANO, M
影响因子：
5.5
作者：
Barrett, JF;Keat, N
通讯作者：
Keat, N
影响因子：
5
作者：
Liu, Franklin;Cuevas, Carlos;Kinahan, Paul E.
通讯作者：
Kinahan, Paul E.
影响因子：
2.4
作者：
Winklhofer, Sebastian;Lambert, Jack W.;Yeh, Benjamin M.
通讯作者：
Yeh, Benjamin M.
影响因子：
1.9
作者：
LANDIS, JR;KOCH, GG
通讯作者：
KOCH, GG