双能量CT虚拟平扫及CTA在宫颈癌诊疗中的应用

发布时间：2018-06-20 12:24

本文选题：宫颈肿瘤 + 双源CT　；参考：《实用医学杂志》2015年06期

【摘要】：目的:探讨双源CT双能量虚拟平扫(VNC)及CT血管显影(CTA)在宫颈癌诊疗中的应用价值。方法:对67例经病理确诊宫颈癌患者用双源CT行常规平扫、动脉期扫描及实质期双能量扫描。比较虚拟平扫与常规平扫(CNC)图像上显示的宫颈病变、臀大肌及膀胱的平均CT值、SNR、CNR、图像质量评分、辐射剂量及对病灶的显示。同时应用双能去骨获得盆腔CTA图像,直观显示肿瘤与周围血管的关系和肿瘤供血动脉。结果:与常规平扫相比,双能量扫描方案辐射剂量ED低于常规扫描方案(P0.05),剂量约降低31.4%。虚拟平扫所测器官CT值差异无统计学意义(P0.05);图像SNR、CNR、图像质量评分有统计学差异(P0.05);两组图像评分比较差异无统计学意义(P0.05),绝对评分虚拟平扫图像低于常规平扫,但均在3分以上,能达到诊断要求;两种图像对病变的大小、位置显示无统计学差异(P0.05)。结论:双源CT盆腔成像中,双能量虚拟平扫具有取代常规平扫的可能,减少1次平扫的放射剂量,在不影响图像质量及病灶检出的情况下降低了辐射剂量,具有潜在的临床应用价值。
[Abstract]:Objective: to evaluate the value of dual source CT dual energy virtual plain scan (VNC) and CT angiography (CTAA) in the diagnosis and treatment of cervical cancer. Methods: 67 cases of cervical cancer diagnosed by pathology were examined with conventional plain scan, arterial phase scan and parenchymal phase double energy scan with dual source CT. The average CT values of the gluteus maximus and bladder were compared between the virtual plain scan and the conventional plain scan (CNC) images. The image quality score, radiation dose and the display of the lesions were compared. At the same time, the pelvic CTA images were obtained by double energy bone removal, and the relationship between tumor and peripheral blood vessels and the tumor blood supply artery were visualized. Results: compared with conventional plain scan, the radiation dose Ed of dual-energy scanning scheme was lower than that of conventional scanning scheme (P0.05), and the dose was about 31.4% lower than that of conventional scan scheme. There was no significant difference in CT value of the organs measured by virtual plain scan (P 0.05); there was no significant difference in image quality score between the two groups (P 0.05); the absolute score of virtual plain scan was lower than that of conventional plain scan, but all of them were above 3 points, and there was no significant difference in image score between the two groups (P < 0.05). There was no significant difference in the size and location of the lesions between the two images (P 0.05). Conclusion: in dual-source CT pelvic imaging, dual energy virtual plain scan is possible to replace conventional plain scan and reduce the radiation dose of one plain scan, and reduce the radiation dose without affecting the image quality and lesion detection. It has potential clinical application value.
【作者单位】：贵州省人民医院影像科;贵州省安顺市人民医院妇产科;
【基金】：安顺市科技计划项目(编号:安市科合[2012]36号)
【分类号】：R737.33;R730.44

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