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首页> 外文期刊>Radiology >Pancreatic malignancy: effect of dual-phase helical CT in tumor detection and vascular opacification.
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Pancreatic malignancy: effect of dual-phase helical CT in tumor detection and vascular opacification.

机译：胰腺恶性肿瘤：双阶段螺旋CT在肿瘤检测和血管混浊中的作用。

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摘要

PURPOSE: To determine the relative value of hepatic arterial and portal venous phase helical computed tomographic (CT) scans for tumor detection and vascular opacification in patients with pancreatic malignancy. MATERIALS AND METHODS: Ninety-five patients who had or were suspected of having pancreatic disease underwent dual-phase helical CT. Arterial phase scans were acquired 20-40 seconds after contrast material administration; venous phase scans, 70-100 seconds after administration. Three readers independently scored images in a blinded fashion for the presence of tumor, for lesion attenuation relative to normal pancreas, and for vascular opacification. RESULTS: The final diagnosis was pancreatic malignancy (n = 60), acute or chronic pancreatitis (n = 22), and normal pancreas (n = 13). The readers identified possible or definite tumors on arterial phase studies in 47-50 patients and on venous phase studies in 48-53 patients (P > .10). There was no statistically significant difference in tumor attenuation between scans from the two phases (P > .05). Agreement between the readers for tumor detection was not affected by the scanning phase (P > .10). Opacification of arteries and of veins was greater on arterial phase scans and on venous phase scans, respectively (P < .001). CONCLUSION: The acquisition of arterial phase scans in addition to venous phase scans does not result in improved detection of pancreatic malignancies.
机译：目的：确定胰腺癌患者肝动脉和门静脉期螺旋计算机断层扫描（CT）扫描对肿瘤检测和血管混浊的相对价值。材料与方法：95名患有或怀疑患有胰腺疾病的患者接受了双阶段螺旋CT检查。造影剂给药后20-40秒获得动脉相扫描。给药后70-100秒，进行静脉相扫描。三位阅读者以盲目方式对肿瘤的存在，相对于正常胰腺的病变减轻以及血管浑浊进行了独立评分。结果：最终诊断为胰腺恶性肿瘤（n = 60），急性或慢性胰腺炎（n = 22）和正常胰腺（n = 13）。读者通过47-50位患者的动脉期研究和48-53位患者的静脉期研究确定了可能或确定的肿瘤（P> .10）。在两个阶段的扫描之间，肿瘤衰减的差异无统计学意义（P> .05）。阅读器之间的肿瘤检测协议不受扫描阶段的影响（P> .10）。在动脉相扫描和静脉相扫描中，动脉和静脉的不透明性分别更大（P <.001）。结论：除了静脉相扫描外，获取动脉相扫描并不能改善胰腺恶性肿瘤的检测。

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