目的 探讨多层螺旋CT对下颌骨骨折的诊断价值。 方法 对2007年4月-2009年10月下颌骨不同部位骨折的45例患者进行多层螺旋CT轴位扫描，并行多平面、表面遮盖法等三维重建，对下颌骨骨折CT表现特征作回顾性分析。 结果 45例下颌骨骨折中，位于下颌体骨折24例，下颌角骨折5例，下颌升支骨折6例，髁部骨折13例，冠突骨折2例；颞下颌关节脱位中，单侧脱位3例，双侧脱位5例。 结论 多层螺旋CT能准确诊断下颌骨各部位骨折，对诊治方案具有重要价值。
ObjectiveTo analyze the relationship between image development types and delay time in computed tomography urography (CTU) examination and to investigate the value of choosing reasonable delay time to get the best images. MethodWe collected the data of 62 patients who underwent multi-slice CTU examination without fully developed images within 8 minutes from January 2010 to May 2014. There were 35 unilateral and 27 bilateral delayed imaging patients with a total of 89 cases. According to the degree of imaging development after the delayed 8 minutes, we divided it into 4 levels as follows:level 0 (no development), levelⅠ (light development), levelⅡ (partial development) and levelⅢ (full development). LevelⅢ was not included in this study. For level 0 to levelⅡ, we delayed scan for 15 to 1 440 minutes. ResultsAs the imaging development degree decreased, the delay time obviously extended. LevelⅡ could be fully displayed after 15 to 150 minutes of delayed scan. LevelⅠ could be fully displayed after 150 to 720 minutes. Level 0 still had no imaging development after 120 minutes, so there was no need to continue scanning. ConclusionsSelecting appropriate delay time of CTU based on the type of delayed imaging development can avoid unnecessary repeated delay scans, get the best development images, and estimate the kidney secretion functions, which is most helpful for accurate diagnosis of urinary system related diseases.
摘要:目的:评价64层螺旋CT对冠心病的诊断价值。方法:对25例典型病例的CT图片进行分析、总结,观察64层螺旋CT对冠状动脉的管腔狭窄程度及冠脉内斑块性质的显示能力,并对桥血管和支架通畅性进行观察。结果:近端冠脉中度以上狭窄的敏感度、准确度、阳性预测值分别为93.5%,90.3%,88.5%,对左主干及前降支病变诊断价值较高;对冠状动脉内软斑块显示较佳;对桥血管及支架通畅和有无再狭窄显示良好。结论:MSCT冠状动脉成像在冠心病筛查及冠状动脉支架术后和搭桥术后的随访发挥重要作用。Abstract: Objective: To study the diagnose value of 64slice spiral CT for coronary heart disease. Methods:The CT pictures of 25 typical cases of coronary heart disease were analyzed so as to survey the displaying ability coronal arterial stenosis, its degree and the character plaques, the patency of bypass graft and stents by 64slice spiral CT. Results:The sensitivity, accuracy, positive predictive value for RCA1 narrow above moderate was 93.5%, 90.3%, 88.5% respectively. For LM and LAD, its diagnose value was high. The coronary soft or fibrous plaque, stent and bypass graft were displayed well. Conclusion:MSCT plays an important role in filtering coronary heart disease and reexamination after stents and bypass.
目的:研究距骨骨折螺旋CT轴扫、多平面(MPR)和三维(3D)重建图像的特点及其临床意义。方法:收集距骨骨折患者术前螺旋CT资料12例,同时进行了MPR和3D重建图像。着重分析距骨骨折线的走行、与关节面的关系、关节面塌陷程度等,并评价轴扫、MPR和3D重建图像的优势。结果:在12例距骨骨折者骨踝关节受累7例。MPR和3D重建图像可直观显示骨折详细情况。结论:螺旋CT轴扫、多平面和三维重建图像相结合,可更好显示距骨骨折的情况,能为临床术前诊断和治疗提供有价值的影像信息。
Objective To introduce the current value of multi-detector row CT (MDCT) and magnetic resonance imaging (MRI) techniques on evaluation of diffuse hepatic parenchymal diseases.Methods By literature review, the application and recent advances of various kinds of MDCT and MR imaging techniques in evaluating diffuse hepatic parenchymal diseases were summarized. Results There were three kinds of diffuse liver parenchyma diseases, which were the diseases of storage, vascular and inflammatory. The morphology changes of diffuse liver parenchyma diseases could be demonstrated well by MDCT. MRI, especially MR functional imaging could reflect the morphology changes, and cellular metabolic activity of the liver, which provided qualitative and quantitative information for the diagnosis and evaluation of therapeutic effect on diffuse liver parenchyma diseases. Conclusion MR imaging techniques, especially those functional techniques, developed rapidly and had practical value in both the diagnosis and severity assessment of hepatic fibrosis.
Objective To probe CT grading criteria of vascular invasion in pancreatic cancer. Methods Retrieved articles in CNKI and PubMed about value of CT in preoperative assessment of vascular invasion in pancreatic cancer last ten years. Results Multislice helical CT is considered the best imaging method to assess the invaded peripancreatic vessels in pancreatic cancer. There are different CT criteria of vascular invasion in pancreatic cancer based on extension of hypodense tumor and its relation to blood vessels, on the degree of circumferential contiguity of tumor to vessel, on the degree of lumen stenosis, and on the degree of contiguity between tumor and vessels combined vascular caliber. Conclusion CT grading criteria are not uniform, each one has defects.