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.

CT54/74LS 161芯片的应用

叙述了用ＣＴ５４／７４ＬＳ １６１芯片构成任意进制计数器的方法与技巧，其方法均通过实验验证无误，在实际应用中可直接使用．

Diagnostic Value of 128-slice Spiral CT Combined with Virtual Colonoscopy for Colorectal Cancer

The objective of this study was to evaluate the diagnostic value of 128-slice spiral CT combined with virtual colonoscopy in diagnosis of colorectal cancer.We retrospectively analyzed 45 patients of colorectal diseases who underwent definition AS+128-slice spiral CT combined with virtual colonoscopy after bowel preparation and gas injection to evaluate the clinical diagnostic value of this technology.All the patients received electronic colonoscopy and were confirmed by pathology.In total,colorectal cancer was confirmed in 42 cases and inflammation in 3 cases.Diagnostic results shows:there were 17 cases of lump,10 cases of infiltration,6 cases of ulcer,9 cases of mixed type,4 cases of liver metastases,and 36 cases of lymph node metastasis.There was no significant difference between 128-slice spiral CT combined with virtual colonoscopy and electronic colonoscopy in detection,localization and characterization of colorectal tumors.CT virtual endoscopy has great advantages in observing the invasion around the lesion and the presence or absence of metastasis in distant organs and lymph node metastasis.It is also possible to understand the shape of the lesion in the intestinal lumen and the length of the lesion involving the lumen of the intestine.

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CTA在主动脉夹层DeBakeyⅠ-Ⅲ型中的诊断价值研究

目的研究64排CT血管成像在主动脉夹层De BakeyⅠ-Ⅲ型中的诊断和临床治疗中的应用价值。方法以我院2013年2月-2015年2月经手术或DSA证实的40例主动脉夹层患者进行回顾性分析,结合MSCT平扫及增强检查,在后处理工作站行多平面重组(MPR)、曲面重组(CPR)、最大密度投影(MIP)、容积再现(VR)重建。结果40例患者中,I型10例(25.0%),II型3例(7.5%),III型27例(67.5%)。64层螺旋CT诊断AD的特异度和敏感度均为100%。MPR和CPR对破口、真假腔及内膜瓣显示率分别为95.9%、100%。结论 64排MSCT检查对主动脉夹层De Bakey分型快速、准确,能够清晰显示主动脉全程及分支变异、内膜瓣、破口、真假腔、剥离范围、分支血管受累、心包填塞等情况有重要的诊断价值,并可对各种急性胸主动脉疾病如心肌梗死、冠心病、肺动脉栓塞及时排除,是主动脉夹层临床诊断的首选和可靠的检查方法。

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.

Computed tomography perfusion and computed tomography angiography for prediction of clinical outcomes in ischemic stroke patients after thrombolysis

Cerebral blood perfusion and cerebrovascular lesions are important factors that can affect the therapeutic efficacy of thrombolysis.At present,the majority of studies focus on assessing the accuracy of lesion location using imaging methods before treatment,with less attention to predictions of outcomes after thrombolysis.Thus,in the present study,we assessed the efficacy of combined computed tomography（CT） perfusion and CT angiography in predicting clinical outcomes after thrombolysis in ischemic stroke patients.The study included 52 patients who received both CT perfusion and CT angiography.Patients were grouped based on the following criteria to compare clinical outcomes：（1） thrombolytic and non-thrombolytic patients,（2） thrombolytic patients with CT angiography showing the presence or absence of a vascular stenosis,（3） thrombolytic patients with CT perfusion showing the presence or absence of hemodynamic mismatch,and（4） different CT angiography and CT perfusion results.Short-term outcome was assessed by the 24-hour National Institution of Health Stroke Scale score change.Long-term outcome was assessed by the 3-month modified Rankin Scale score.Of 52 ischemic stroke patients,29 were treated with thrombolysis and exhibited improved short-term outcomes compared with those without thrombolysis treatment（23 patients）.Patients with both vascular stenosis and blood flow mismatch（13 patients） exhibited the best short-term outcome,while there was no correlation of long-term outcome with CT angiography or CT perfusion findings.These data suggest that combined CT perfusion and CT angiography are useful for predicting short-term outcome,but not long-term outcome,after thrombolysis.

128层螺旋CT尿路造影对上尿路梗阻性疾病的诊断价值

目的探讨128层螺旋CT尿路造影（128-slicespiralCTU）在上尿路梗阻性疾病诊断中的价值。方法搜集经B超或静脉肾盂造影（IVU）检查提示上尿路梗阻而原因不明的患者30例，均行128层螺旋CT尿路造影检查，在工作站对获得的图像进行多平面重建（MPR）、容积再现（VRT）及最大密度投影（MIP）等三维后处理，获得泌尿系立体图像。结果30例中上尿路结石15例，先天性畸形7例，肾盂输尿管癌2例，输尿管炎性狭窄3例，邻近器官病变导致的上尿路梗阻1例，以上病例均经手术或输尿管镜检证实，2例未确诊，诊断准确率为93．33％。结论128-slicespiralCTU通过MPR、VRT、MIP、CPR技术多角度观察能够更加清晰地显示出导致上尿路梗阻的病变及其形态，在上尿路梗阻病变诊断方面有独特的优势。