Imaging Effect and Accuracy Analysis of 64-Slice Spiral CT in the Diagnosis of Coronary Artery Stenosis

Objective:To analyze the imaging effect and accuracy of 64-slice spiral CT in the diagnosis of coronary artery stenosis.Methods:30 patients with suspected coronary heart disease admitted to our hospital from March 2022 to March 2023 were selected.All patients underwent both 64-slice spiral CT and digital subtraction angiography(DSA).DSA is considered the gold standard for diagnosis,so it was used to analyze the diagnostic performance of 64-slice spiral CT.Results:(1)The diagnostic results of digital subtraction angiography and 64-slice spiral CT was analyzed and compared with each other.The 64-slice spiral CT had an accuracy of 96.67%(29/30),a sensitivity 96.55%(28/29),and a specificity of 100.00%(1/1)in diagnosing coronary artery stenosis.(2)There was no significant difference between 64-slice spiral CT and digital subtraction angiography in the positive detection rate of anterior descending artery lesion,the positive detection rate of left main lesion,the positive detection rate of left circumflex artery lesion and the positive detection rate of right coronary artery lesion(P>0.05).(3)There was no significant difference between 64-slice spiral CT examination and DSA examination in identifying mild stenosis,moderate stenosis,and severe stenosis of coronary arteries(P>0.05).Conclusion:64-slice spiral CT examination can accurately determine the degree of occlusion of coronary arteries,which allows for the accurate diagnosis of coronary artery stenosis.

Clinical Effect of Magnetic Resonance Imaging and 64-slice Spiral CT in the Diagnosis of Ischemic Heart Disease Patients

Objective:To explore the clinical methods and clinical effects of applying magnetic resonance imaging(MRI)and 64・slice spiral computed tomography(CT)in the diagnosis of patients with ischemic heart disease.Methods:100 patients with ischemic heart disease were selected as the research objects.Selecting the patients from May 2020 to May 2021 as a sample,the patients were divided into two groups,and different diagnostic methods were used to compare the clinical diagnosis effects.Results:In terms of the diagnostic accuracy of the two groups of patients,the maximum value was 92.00%(experimental group)and the minimum value was 80.00%(control group).There was a big difference in data between the two groups,P<0.05,which was statistically significant.The patient9s(experimental group)diagnosis accuracy rate is highe Conclusion:In the process of research work for patients with ischemic heart disease,it is particularly important to diagnose the patients.The combined application of and 64-slice spiral CT can improve the clinical diagnosis efficiency and achieve significant results.

64排CT对主动脉夹层的诊断价值

目的:探讨主动脉夹层在64排CTCTA下的表现及64排CTCTA对该病的临床诊断价值和优势。方法:回顾性分析85例经临床证实的主动脉夹层CTA表现及其与DSA的比较。结果:85例患者中阳性58例,阴性27例。与DSA比较造影剂用量明显减少,肾毒性减小;检查时间缩短,患者接受辐射量减少;显示病变范围扩大等。结论:多排螺旋CTA具有几种技术特点,最大密度投影(MIP),表面遮盖显示(SSD),多平面重组(MPR),容积再现(VR)等,成像后可以清晰地显示主动脉全程血管的形态走向。区分动脉管壁的硬化性钙斑及管腔内造影剂,从各方位、多角度直观观察评判受检血管,对临床医生治疗具有重要的指导价值。

Efficacy of high resolution computed tomography for detection of early healing in scaphoid fractures

Background: While plain radiography is commonly used to assess scaphoid fracture, this imaging modality may not accurately demonstrate early bone healing. This investigation evaluates the utility of 64-slice CT in the detection of early fracture healing compared to plain radiographs and magnetic resonance imaging (MRI). Methods: Outpatients attending follow-up visits for scaphoid fractures at Hamilton General Hospital were included in this investigation. Inclusion criteria included outpatients over age of 18 who consented to attend a follow-up visit for the scaphoid fracture at 6 weeks for X-Ray, 64-slice CT and MRI scan to monitor fracture healing. Assessment of healing was independently interpreted by two radiologists specialized in musculoskeletal imaging. A total of 7 adult outpatients were accrued, with each case classified as healing, not healing, or equivocal for plain radiography and 64-slice CT scan. Results: For plain radiographs, the level of interrater agreement for evidence of healing was 57% (4/7) cases. When comparing this to CT scans, there was no discrepancy between radiologists as 100% (7/7) were found to have evidence of healing. The 64-slice CT scan demonstrated evidence of early trabecular continuity in all cases, including radiographs that were interpreted as equivocal. Conclusion: This study can be considered a pilot project for the efficacy of 64-slice CT in the assessment of early healing of scaphoid fractures. For clinicians, the multiplanar reconstruction images allows for more accurate assessment of fractures than plain radiography. CT scans are able to penetrate through bony callus that may obscure visualization of healing in plain radiography, demonstrate trabecular continuity better than plain radiographs, are readily accessible and provide faster imaging acquisition. The observations from this study may have implications in terms of duration and type of casting applied, timing of strengthening exercises, and avoiding unnecessary surgery which affect patient morbidity and cost of care.

64排螺旋CT多重扫描肝肿瘤的诊断分析

本研究以67例肝肿瘤患者为研究对象,采用64排螺旋CT平扫及多重扫描,并以原始数据进行多平面重建、最大密度投影和三维容积重建等后期处理,试图分析和探讨64排螺旋CT多重扫描技术及其后期图像处理技术在诊断肝肿瘤的临床应用中价值。研究结果显示CT多重扫描的检出率（95.52%）明显优于平扫检出率（71.64%）;在多平面重建、最大密度投影和三维容积重建三种处理技术中,动脉解剖识别方面三维容积重建技术效果最优（p〉0.05）,病灶血管显示方面多平面重建技术效果最优（p〉0.05）,血管连续性显示方面最大密度投影技术效果最优（p〉0.05）;而3种后期图像显示方式在血管形态方面效果均良好（p〉0.05））。本研究结果提示64排螺旋CT多重扫描技术可较准确的进行肝肿瘤诊断,结合不同后期图像处理重建技术可为肝肿瘤诊断定性,在临床诊断肝肿瘤具有重要价值。

东软64层CT整机研制及关键技术研发

目的:64层CT整机研制与关键技术研发。方法:按照产、学、研、医联合方式,通过原始与系统创新,攻克系统平台技术、数据采集技术、低剂量成像伪影校正及噪声抑制技术、图像重建及优化技术等多项64层CT关键技术。结果:成功研制出中国首台具有完全自主知识产权的64层CT整机,其性能指标达到国际同类产品先进水平,产品通过CCC、SFDA,CE、FDA、CB、CSA等认证。结论:东软集团的64层CT已正式进入医用CT高端市场。

某医院64排CT机建设项目现场审查验收报告

目的对某医院64排CT机建设项目进行现场审查验收,向卫生行政部门提出现场审查验收报告,作出验收结论。方法采用审阅申请验收材料和现场审查相结合的方式,依据有关法律、法规和标准的规定进行现场审查验收。结果该建设项目选址与布局合理,扫描室屏蔽厚度、室外漏射线空气比释动能率及对室外人员可能受到照射的年有效剂量均符合国家有关标准的要求。结论该建设项目职业病危害控制效果符合国家有关法律、法规和标准的要求,现场审查验收合格,建议批准。