Segmental radiofrequency ablation of pulmonary vein ostia for patients with refractory paroxysmal atrial fibrillation using multi-slice spiral computed tomography guidance

Objective： To evaluate the safety and clinical efficacy of segmental radiofrequency ablation of pulmonary vein （PV） ostia for patients with refractory paroxysmal atrial fibrillation （AF） under multi-slice spiral computed tomography （MSCT） guidance before the procedure. Methods： A series of 58 consecutive patients with refractory paroxysmal AF were enrolled to undergo segmental radiofrequency ablation ofPV ostia. The 36 male and 22 female patients with mean age of （57.4±9.5） （32-79） years and no obvious organic heart disease. Before ablation, patients received MSCT to generate 3-dimentional image of the left atrium （LA） and proximal PVs. Patients then underwent segmental radiofrequency ablation ofPV ostia using PV circular mapping catheter manipulated several times to ensure complete isolation between PVs and LA. Results： No complications occurred during the procedure. One patient developed delayed cardiac tamponade, which was drained percutaneously. The mean follow-up time was （17.1±9.3） months. Forty-one patients （95%） experienced improved quality of life one month after the procedure. Thirty-six patients （83%） showed stable sinus rhythm, while 10 patients （23%） required additional anti-arrhythmic drugs. AF returned≥1 time in 6 （14%） patients who underwent anti-arrhythmic drug therapy, but the number of episodes was less than that before the procedure. However, one patient experienced recurrent episodes of atrial flutter. Conclusion： It is safe and effective to perform segmental radiofrequency ablation of PV ostia for patients with refractory paroxysmal AF using MSCT guidance mappening.

Multi-slice spiral computed tomography in diagnosing unstable pelvic fractures in elderly and effect of less invasive stabilization

BACKGROUND Older people are more likely to experience pelvic fractures than younger people.Multi-slice spiral computed tomography(CT)uses three-dimensional(3D)reconstruction technology to generate 3D images that can clearly demonstrate the 3D space of fractures and detect fractures at a higher rate.AIM To investigate the clinical value of multi-slice spiral CT 3D reconstruction in the diagnosis of unstable pelvic fractures in the elderly as well as the effect of less invasive stabilization.METHODS A total of 86 patients with unstable pelvic fractures treated between March 2016 and March 2019 underwent femoral supracondylar bone traction before surgery.Pelvic radiography and multi-row spiral CT were performed successively once the patient’s vital signs and hemodynamic indices were stable.Secondary processing of the original data was performed to obtain 3D reconstruction images and determine the vertical displacement of the pelvis.After basic or complete reduction,minimally invasive internal fixation using hollow lag screws was performed.The detection rates of fracture location and classification by X-ray and CT reconstruction were compared.Patients were divided into two groups according to the presence or absence of preoperative 3D reconstruction to compare postoperative reduction,wound healing time,fracture healing time,hospitalization time,visual analog scale(VAS)score,poor internal fixation,and functional recovery.RESULTS The diagnostic coincidence rates of X-rays for pubic symphysis,ilium wing,sacroiliac periarticular,and sacral fractures were lower than those of CT reconstruction.The coincidence rate of CT reconstruction in the clinical classification of pelvic fractures was 100%,whereas 11 cases were misdiagnosed by X-ray;the total coincidence rate was 87.21%.The total excellent and good rates of postoperative reduction were significantly higher in the study group than in the control group(P<0.05).The wound healing,fracture healing,and hospitalization times were significantly shorter in the study group than in the control group(P<0.05).The VAS scores decreased in both groups postoperatively and were lower in the study group than in the control group(P<0.05).The total incidence of poor postoperative internal fixation was significantly lower in the study group than in the control group(P<0.05).The overall rate of postoperative functional recovery was significantly higher in the study group than in the control group(P<0.05).CONCLUSION Multi-slice spiral CT has high guiding significance for the diagnosis,classification,and treatment of unstable pelvic fractures in the elderly.Preoperative 3D reconstruction can effectively shorten the operation time and promote fracture healing,while minimally invasive internal fixation can effectively reduce pain and promote functional recovery of fracture sites,making it worthy of clinical application.

Multi-slice spiral computed tomography in differential diagnosis of gastric stromal tumors and benign gastric polyps,and gastric stromal tumor risk stratification assessment

BACKGROUND The biological characteristics of gastric stromal tumors are complex,and their incidence has increased in recent years.Gastric stromal tumors(GST)have potential malignant tendencies,and the probability of transformation into malignant tumors is as high as 20%-30%.AIM To investigate the value of multi-slice spiral computed tomography(MSCT)in the differential diagnosis of GST and benign gastric polyps,and GST risk stratification assessment.METHODS We included 64 patients with GST(GST group)and 60 with benign gastric polyps(control group),confirmed by pathological examination after surgery in PLA General Hospital,from January 2016 to June 2021.The differences in the MSCT imaging characteristic parameters and enhanced CT values between the two groups before surgery were compared.According to the National Institutes of Health’s standard,GST is divided into low-and high-risk groups for MSCT imaging characteristic parameters and enhanced CT values.RESULTS The incidences of extraluminal growth,blurred boundaries,and ulceration in the GST group were significantly higher than those in the control group(P<0.05).The CT values and enhanced peak CT values in the arterial phase in the CST group were higher than those in the control group(P<0.05).The MSCT differential diagnosis of GST and gastric polyp sensitivity,specificity,misdiagnosis rate,missed diagnosis rate,and areas under the curve(AUCs)were 73.44%,83.33%,26.56%,16.67%,0.784,respectively.The receiver operating characteristic curves were plotted with the arterial CT value and enhanced peak CT value,with a statistical difference.The results showed that the sensitivity,specificity,misdiagnosis rate,missed diagnosis rate,and AUC value of arterial CT in the differential diagnosis of GST and gastric polyps were 80.18%,62.20%,19.82%,37.80%,and 0.710,respectively.The sensitivity,specificity,misdiagnosis rate,missed diagnosis rate,and AUC value of the enhanced peak CT value in the differential diagnosis of GST and gastric polyps were 67.63%,60.40%,32.37%,39.60%,and 0.710,respectively.The incidence of blurred lesion boundaries and ulceration in the high-risk group was significantly higher than that in the low-risk group(P<0.05).The arterial phase and enhanced peak CT values in the high-risk group were significantly higher than those in the low-risk group(P<0.05).CONCLUSION Presurgical MSCT examination has important value in the differential diagnosis of GST and gastric benign polyps and can effectively evaluate the risk grade of GST patients.

Efficacy of multi-slice spiral computed tomography in evaluating gastric cancer recurrence after endoscopic submucosal dissection

BACKGROUND Recurrence is the major challenge facing endoscopic submucosal dissection(ESD)-based treatment therapies for early gastric cancer(EGC).Urgent development of simple and easy surveillance approaches will enhance clinical treatment of the disease.AIM To explore the role of computed tomography(CT)recurrence in evaluating EGC after ESD treatment.METHODS We retrospectively recruited patients from our endoscopy department,between January 2002 and December 2015,and analyzed their basic characteristics,including symptoms,CT results,and results of endoscopy with biopsy,among others.RESULTS Among a total of 2150 patients EGC patients surveyed,1362 met our inclusion and exclusion criteria and were therefore enrolled in our study.The cohort’s sensitivity of CT for recurrent GC and specificity were 44.22%and 43.86%,respectively,with negative and positive predictive values of 40.15%(275/685)and 48.01%(325/677),respectively.The area under the curve of arterial and venous CT values for recurrent EGC were 0.545,and 0.604,respectively.Receiver operating characteristic curve revealed no statistically significant differences between arterial and venous CT values for recurrent EGC.CONCLUSION Enhanced CT has superior diagnostic efficacy,but less accuracy,compared to gold standard techniques in patients with recurrent EGC.

Portal vein computed tomography imaging characteristics and their relationship with bleeding risk in patients with liver cirrhosis undergoing interventional therapy

BACKGROUND This study aimed to analyze the predictive value of multi-slice spiral computed tomography(CT)perfusion imaging for upper gastrointestinal bleeding in patients with cirrhotic portal hypertension.A total of 62 patients with cirrhotic portal hypertension and 28 healthy individuals were included.The results showed that multi-slice spiral CT perfusion imaging had a significant predictive value for upper gastrointestinal bleeding in patients with cirrhotic portal hypertension.The vascular area,number of vascular cross-sections,and gastric coronary vein diameter(GCVD)showed high predictive values,with the vascular area having the best predictive value.AIM To investigate the predictive accuracy of multi-slice spiral CT perfusion imaging for upper gastrointestinal bleeding in patients with cirrhosis and portal hypertension.METHODS This study included 62 patients with cirrhotic portal hypertension(disease group)and 28 healthy individuals(control group).The disease group was further divided into two subgroups:Group A(n=27,bleeding)and group B(n=35,no bleeding).All patients underwent multi-slice spiral CT perfusion imaging at our hospital,and we compared various parameters such as liver blood flow,vein size,number of blood vessels,and blood vessel area between the two groups.We employed statistical analysis to identify factors associated with upper gastrointestinal bleeding and created a graph comparing the predictive value of different factors for bleeding.RESULTS We found no difference in hepatic artery(HAP)levels among the three groups(all P>0.05).The portal vein levels in groups A and B were much lower than in the control group;group A was much lower than group B(all P<0.05).The HAP perfusion index levels in groups A and B were much higher than in the control group;group A was much higher than group B(all P<0.05).The portal vein diameter,splenic vein diameter,and GCVD levels in groups A and B were much higher than in the control group;those in group A were much higher than those in group B(all P<0.05).The number of blood vessels and blood vessel area in groups A and B were much higher than in the control group;those in group A were much higher than those in group B(all P<0.05).The statistical method showed a strong link between GCVD,number of blood vessels,blood vessel area,and upper gastrointestinal bleeding(odds ratio=1.275,1.346,1.397,P<0.05).The graph showed that GCVD,number of blood vessels,and blood vessel area could predict bleeding well,with blood vessel area having the best prediction power.CONCLUSION That multi-slice spiral CT perfusion imaging can predict upper gastrointestinal bleeding well in patients with cirrhosis and high blood pressure in the portal vein.GCVD,number of blood vessels,and blood vessel area had high prediction power.The blood vessel area had the best prediction power,with an area under the curve of 0.831.

Assessment of coronary artery disease using coronary computed tomography angiography and biochemical markers

Chronic inflammatory mechanisms in the arterial wall lead to atherosclerosis,and include endothelial cell damage,inflammation,apoptosis,lipoprotein deposition,calcification and fibrosis.Cardiac computed tomography angiography(CCTA)has been shown to be a promising tool for non-invasive assessment of theses specific compositional and structural changes in coronary arteries.This review focuses on the technical background of CCTA-based quantitative plaque characterization.Furthermore,we discuss the available evidence for CCTA-based plaque characterization and the potential role of CCTA for risk stratification of patients with coronary artery disease.

Multiphase hepatic scans with multirow- detector helical CT in detection of hypervascular hepatocellular carcinoma

BACKGROUND: Multirow-detector helical CT (MDCT) allows faster Z-axis coverage and improves longitudinal re- solution to scan the entire liver. This study was to evaluate the value of multiphase hepatic CT scans using MDCT in diagnosing hypervascular hepatocellular carcinoma (HCC). METHODS: Multiphase hepatic CT scans in 40 patients were carried out with a Marconi Mx8000 MDCT scanner. The scans of early arterial phase (EAP), late arterial phase (LAP) and portal venous phase (PVP) were started at 21, 34 and 85 seconds after injection of contrast medium, re- spectively. The number of detected lesions was calculated in each phase. The density of the liver and tumor was great- er than 1 cm for HCC, and the density of the liver and tumor in each phase was statistically calculated. RESULTS: A total of 61 lesions were found in the 40 pa- tients , and lesions greater than 1 cm were seen in 47 cases. The density differences between the liver and tumor were statistically significant (P<0.05) at the LAP and EAP and between the LAP, EAP and PVP. In the 61 lesions, the de- tectability in the EAP, LAP and the double arterial phases (DAP) was 32%, 87%, and 94%, respectively. Significant difference was found between the LAP plus PVP and the EAP plus PVP; but no significant difference was observed between the DAP plus PVP and the LAP plus PVP. CONCLUSIONS: The utility of MDCT scan in the liver has optimized the protocol of arterial phase scan. MDCT is possible to scan the entire liver in a real arterial phase and it is very valuable in the detection of small HCC.

Validation of a novel imaging approach using multi-slice CT and cone-beam CT to follow-up on condylar remodeling after bimaxillary surgery

The main goal of this study was to introduce a novel three-dimensional procedure to objectively quantify both inner and outer condylar remodelling on preoperative multi-slice computed tomography （MSCT） and postoperative cone-beam computed tomography （CBCT） images. Second, the reliability and accuracy of this condylar volume quantification method was assessed. The mandibles of 20 patients （11 female and 9 male） who underwent bimaxillary surgery were semi-automatically extracted from MSCT/CBCT scans and rendered in 3D. The resulting condyles were spatially matched by using an anatomical landmark-based registration procedure. A standardized sphere was created around each condyle, and the condylar bone volume within this selected region of interest was automatically calculated. To investigate the reproducibility of the method, inter- and intra-observer reliability was calculated for assessments made by two experienced radiologists twice five months apart in a set of ten randomly selected patients. To test the accuracy of the bone segmentation, the inner and outer bone structures of one dry mandible, scanned according to the clinical set-up, were compared with the gold standard, micro-CT. Thirty-eight condyles showed a significant （P〈O.05） mean bone volume decrease of 26.4%_ 11.4% （502.9 mm3＋ 268.1 mm3）. No significant effects of side, sex or age were found. Good to excellent （ICC〉 0.6） intra- and inter-observer reliability was observed for both MSCT and CBCT. Moreover, the bone segmentation accuracy was less than one voxel （0.4 mm） for MSCT （0.3 mm __. 0.2 mm） and CBCT （0.4 mm _ 0.3 mm）, thus indicating the clinical potential of this method for objective follow-up in pathological condylar resorption.

The accuracy and optimal slice thickness of multislice helical computed tomography for right and left ventricular volume measurement

Background Multislice helical computed tomography (MSCT) has been used to depict coronary anatomy noninvasively, and proved useful for evaluating ventricular function. The aim of our study was to assess the accuracy of ventricular volume as measured by MSCT.Methods Fourteen human left ventricular (LV) and 15 right ventricular (RV) casts were scanned by MSCT. A series of LV and RV short-axis images were reconstructed later with slice thickness of 2.0 mm, 3.5 mm, 5.0 mm, 7.0 mm, and 10.0 mm. Ventricular volume was calculated by the multislice tomographic Simpson’s method. True LV and RV cast volumes were determined by water displacement. Results Both calculated LV and RV volumes correlated highly with the corresponding true volumes (all r>0.95, P<0.01). But with slice thickness from 2.0 mm to 10.0 mm, MSCT scanning overestimated the corresponding true volume by (3.21±5.95) ml to (12.58±8.56) ml for LV and (10.22±8.45) ml to (23.91±12.24) ml for RV (all P<0.01). There was a very high correlation between the overestimation and the selected slice thickness for both LV and RV volume measurements (r=0.998 and 0.996, P<0.01, respectively). However, when slice thickness was reduced to 5.0 mm, the overestimation for both LV and RV volume measurements became nonsignificant for slice thickness from 2.0 mm to 5.0 mm. Conclusions Both LV and RV volumes can be accurately estimated by MSCT. Thinner slice has more accurate calculated volume. However, 5.0 mm slice thickness is thin enough for an accurate measurement of LV or RV volume.

Improvement of Efficiency and Flexibility in Multi-slice Helical CT

One of the main aspects in computed tomography (CT) development is to make CT rapidly scan a large longitudinal volume with high z-axis resolution. The combination of helical scanning with multi-slice CT is a promising approach. Image reconstruction in multi-slice CT becomes, therefore, the major challenge. Known algorithms need to derive the complementary data or work only for certain range of pitches. A reconstruction algorithm was presented that works with the direct data as well as arbitrary pitches. Filter interpolation based on the proposed method was implemented easy. The results of computer simulations under kinds of conditions for four-slice CT were presented. The proposed method can obtain higher efficiency than the conventional method.

多排螺旋计算机断层扫描血管造影在儿童主动脉弓发育异常中的诊断价值

目的评估多排螺旋计算机断层扫描(multi-detector computed tomography,MDCT)血管造影在患儿主动脉弓发育异常中的诊断价值,以及进一步了解患儿先天性主动脉弓发育异常的影像学表现。方法收集泰康同济(武汉)医院2010年至2022年经MDCT血管造影和经胸超声心动图(transthoracic echocardiography,TTE)检查诊断为先天性心脏病的362例患儿(年龄范围为5 d~12岁,平均年龄为3.3岁)。所有诊断结果均经手术和(或)心血管造影所证实。结果362例被诊断为先天性心脏病的患儿中,198例为先天性主动脉发育异常,包括主动脉缩窄、主动脉弓离断、右位主动脉弓和迷走右锁骨下动脉以及主动脉双弓,例数分别为134、32、20、10及2例。6例罕见先天性主动脉弓异常:2例双主动脉弓,2例孤立右锁骨下动脉伴动脉导管未闭(patent ductus arteriosus,PDA),1例孤立颈总动脉伴PDA,1例双侧PDA合并单心室和肺动脉闭锁。32例主动脉弓离断患儿中,27例为A型、5例为B型。MDCT血管造影诊断先天性心脏病的敏感度、特异度、准确率分别为100%(198/198)、98%(161/164)和99%(359/362)。TTE的诊断敏感度、特异度、准确率分别92%(182/198)、81%(133/164)和87%(315/362)。结论MDCT血管造影诊断患儿先天性主动脉弓发育异常是一个可靠的、无损伤的活体检查方法,可获得比传统的血管造影术更多的解剖信息及影像学表现。

MRI多b值成像联合64排螺旋CT在乙型肝炎肝硬化患者肝脏再生结节诊断中的价值

目的分析磁共振成像(MRI)多b值成像联合64排螺旋计算机断层扫描(CT)在乙型肝炎肝硬化患者肝脏再生结节诊断中的价值。方法将2020年3月—2022年7月南通市第二人民医院收治的69例乙型肝炎肝硬化占位性病变患者的临床资料进行回顾性分析,以病理诊断结果分成对照组(n=24,肝脏癌变结节)与研究组(n=45,肝脏再生结节)。所有患者均接受MRI多b值成像检查、64排螺旋CT检查,对比两组患者一般资料,对比两组患者门静脉、主动脉不同期扫描的CT值,对比两组患者肝实质不同期扫描的CT值,以病理诊断为金标准,分析64排螺旋CT检查及MRI多b值成像检查与病理诊断结果间的一致性,制作受试者工作特征曲线(ROC),采用曲线下面积(AUC)评价MRI多b值成像检查、64排螺旋CT检查及二者联合对乙型肝炎肝硬化患者肝脏再生结节的诊断价值。结果病理结果显示,对照组中共检出37个癌变结节,研究组中共检出98个再生结节。两组性别、年龄、肝硬化朔伊尔分期及结节直径对比无显著差异(P>0.05)。研究组门静脉的延迟期、动脉期扫描的CT值比对照组高(P<0.05)。研究组主动脉的门脉期、动脉期扫描的CT值比对照组高(P<0.05)。研究组肝实质的动脉期、门脉期及延迟期扫描的CT值高于对照组(P<0.05)。MRI多b值成像检查、64排螺旋CT检查及二者联合诊断乙型肝炎肝硬化患者肝脏再生结节与病理诊断的Kappa值分别为0.821、0.758、0.897,具有较好的一致性(P<0.05)。ROC曲线结果显示,MRI多b值成像检查、64排螺旋CT检查及二者联合诊断乙型肝炎肝硬化患者肝脏再生结节的AUC值分别为0.792、0.739、0.942(P<0.05)。结论MRI多b值成像联合64排螺旋CT在诊断乙型肝炎肝硬化患者肝脏再生结节价值更高。

MSCT平扫联合三期增强扫描对肺癌的诊断价值

目的:探讨多层螺旋CT(Multislieces helieal Computed Tomography,MSCT)平扫联合三期增强扫描对肺癌的诊断价值。方法:选取2022年1月至2023年12月期间于本院就诊的100例疑似肺癌患者作为研究对象。患者均接受MSCT平扫和三期增强扫描,并以肺穿刺病理活检结果作为金标准,比较MSCT平扫、三期增强扫描单独及联合对肺癌的诊断结果,并计算其敏感度、特异度、准确率、阳性预测值、阴性预测值,以评估单独及联合检查对肺癌的诊断价值。结果:100例疑似肺癌患者经肺穿刺病理活检确诊72例肺癌,占比为72%(72/100)。以肺穿刺病理活检为金标准,MSCT平扫对肺癌的检出率为65.28%(47/72),三期增强扫描检出率为81.94%(59/72),联合检查对肺癌的检出率为94.44%(68/72),联合诊断的检出率高于各单独检查,且与金标准的一致性也高于各项单独检查,为0.774。MSCT平扫、三期增强联合检查的敏感度、准确率、阴性预测值均显著高于MSCT平扫和MSCT三期增强扫描单独检查(P<0.05)。结论:MSCT平扫联合三期增强扫描可有效诊断肺癌,且与金标准有较强的一致性。

64排螺旋CT检测冠心病患者冠状动脉斑块分型的分布特点与其血清IL-6、TNF-α含量的相关性

目的通过64排螺旋CT检测各型冠心病中软斑块、混合斑块、钙化斑块的分布,探讨冠脉斑块稳定性与IL-6和TNF-α含量的相关性。方法选择89例住院接受冠脉造影的患者根据临床诊断分为正常对照组、稳定型心绞痛组(SAP)和急性冠脉综合征组(ACS)(不包括急性ST段抬高的心肌梗死)。64排螺旋CT检查后根据斑块性质分为正常对照组、软斑块组、混合斑块组和钙化斑块组,测定血清IL-6和TNF-α。结果①在ACS组软斑块、混合斑块的分布显著高于钙化斑块(P<0.001),而在SAP组钙化斑块的分布显著高于ACS组(P<0.001);②各斑块组平均血清IL-6和TNF-α水平显著高于对照组(P<0.05);软斑块组、混合斑块组平均血清IL-6和TNF-α水平高于钙化斑块组(P<0.05);而于软斑块组和混合斑块组间平均血清IL-6和TNF-α水平比较差异无显著性(P>0.05);③ACS组平均血清IL-6和TNF-α水平显著高于对照组及SAP组(均P<0.01)。结论①64排螺旋CT冠脉造影可较准确地显示冠心病患者病变冠状动脉斑块的性质;②血清IL-6、TNF-α平可较好反映冠心病患者冠状动脉斑块的不稳定性;③64排螺旋CT检测分析斑块在各型冠心病分布特点及IL-6、TNF-α含量分析,可对冠状动脉斑块的稳定性进行评估,对预测心血管事件及危险分级提供有益参考。

非增强螺旋CT扫描对急性阑尾炎的诊断价值

目的 评价非增强螺旋CT扫描对急性阑尾炎的诊断价值。资料与方法 对 115例临床怀疑急性阑尾炎患者作非增强螺旋CT扫描 ,不口服或结肠内灌注对比剂 ,层厚 10mm ,Pitch 1,扫描范围从L3 椎体至耻骨联合。CT诊断急性阑尾炎的标准包括阑尾增粗横径超过 6mm ,或阑尾结石同时伴有阑尾周围的炎性改变。CT诊断结果与手术、病理或临床随访结果进行对照。结果 CT发现 5 6例真阳性 ,49例真阴性 ,7例假阴性和 3例假阳性。CT诊断急性阑尾炎的敏感性为 89%,特异性为 94%,准确性为 91%,阳性预测值为 95 %,阴性预测值为 88%。 49例无阑尾炎患者中 ,CT发现其他病变 2 2例 (45 %)。结论 非增强螺旋CT扫描 ,能快速、准确地诊断有无急性阑尾炎 ,而且还能发现除阑尾炎以外的其他各种病变。

多发伤早期救治中64层螺旋CT的应用

目的探讨64层螺旋CT在多发伤早期救治中的作用。方法回顾性分析2006年1月至2007年10月间救治的284例多发伤,男性232例,女性52例;平均年龄34.5岁。头颈伤54例,面部伤35例,胸部伤125例,腹部伤112例,骨盆及四肢伤104例,体表伤254例。合并休克103例。ISS10～54分,平均16.3分。37例因伤情过重直接送入手术室,247例到院后3h内64层螺旋CT检查。结果螺旋CT检查时间8.4min。21例初检时有漏诊。急诊手术154例,其中启动绿色通道74例,非手术治疗130例。治愈272例(95.8%);死亡12例(4.2%)。结论多发伤早期救治中应用64层螺旋CT有助于缩短院内术前时间,提高早期确诊率和救治水平。

64排螺旋CT血管造影与3D-DSA在颅内动脉瘤诊断中的对比研究

目的探讨64排螺旋CT血管造影(CTA)、三维数字减影血管造影(3D-DSA)在颅内动脉瘤诊断中的应用价值。方法回顾性分析39例颅内动脉瘤患者的64排螺旋CTA、3D-DSA和手术资料,以手术为标准判定CTA和3D-DSA的临床诊断价值。结果 39例患者共发现44个动脉瘤,其中35例为单个动脉瘤,3例为2个动脉瘤,1例为3个动脉瘤。动脉瘤直径最小2.2mm,最大直径27mm。3D-DSA检出动脉瘤44个,与手术结果一致。3D-DSA能清晰显示所有动脉瘤的位置、大小、形态以及瘤颈宽度、瘤顶指向,发现动脉瘤的敏感性、特异性均为100%。64排螺旋CTA检出动脉瘤43个,漏诊1个,假阳性1个,64排螺旋CTA所显示的动脉瘤的位置、大小、形态及与周围结构关系与手术治疗所见一致,对动脉瘤的敏感性、特异性分别为97.7%和97.4%。结论 64排螺旋CTA诊断颅内动脉瘤有较高准确性,绝大部分动脉瘤性蛛网膜下腔出血的患者可以直接依据64排螺旋CTA结果进行手术治疗,在指导动脉瘤治疗方面可对3D-DSA起到重要补充作用。

64排螺旋CT血管造影对颅内动脉瘤手术的指导价值

目的探讨64排螺旋CT血管造影(CTA)对开颅夹闭术治疗颅内动脉瘤的临床指导价值。方法依据CTA检查结果,对56例颅内动脉瘤的患者行动脉瘤夹闭术。CTA扫描层厚0.625mm,后处理技术包括多层面重建(MPR)、表面遮盖三维重建(3-SSD)、容积显示重建(VR)、最大密度投影重建(MIP)。对照手术结果,评估CTA对颅内动脉瘤诊断和手术的指导价值。结果CTA共发现56例58个动脉瘤,手术共夹闭56个动脉瘤。①手术中发现动脉瘤的位置与CTA检查结果完全一致,符合率为100%。②术中有5个动脉瘤瘤体无法完全暴露,其余51个动脉瘤瘤体形态术中观察结果与CTA结果完全吻合,其中24个椭圆形、19个圆形动脉瘤的瘤顶指向与手术发现完全吻合。③CTA对动脉瘤与主要分支动脉关系的检测结果与手术观察完全吻合,其中49个动脉瘤瘤颈与分支动脉无关,7个动脉瘤瘤颈累及分支动脉。④CTA共发现21个动脉瘤瘤体有泡状突起,其中术中证实15个突起部位即为动脉瘤破裂部位,6个未发现破裂口。⑤CTA检测的动脉瘤瘤颈平均直径为(5.92±0.86)mm;术中测量平均为(6.13±1.06)mm。⑥所有动脉瘤瘤颈宽度的检测,CTA与手术结果差异无统计学意义(P>0.05)结论64排螺旋CTA能清晰显示动脉瘤的瘤体大小、瘤颈、瘤顶指向、载瘤动脉及动脉瘤与邻近血管和骨性组织间的空间关系,诊断颅内动脉瘤有较高的准确性,对制定动脉瘤的治疗方案有重要的指导价值。

多层螺旋CT对结肠癌术前淋巴结转移诊断价值的研究

目的探讨多层螺旋CT(MSCT)诊断结肠癌术前腹腔淋巴结转移的价值。方法回顾性分析2015年3月—2017年1月间在我院经手术病理确诊为结肠癌的58例病人的临床及影像资料,其中男32例,女26例;年龄31～78岁,平均(49.58±14.28)岁。对术前MSCT检测到的腹腔可疑转移淋巴结进行分析,分别以淋巴结短径、相对强化值及综合上述2种参数等作为判定淋巴结转移的标准,并采用Kappa检验对MSCT诊断及术后病理结果的一致性进行分析。结果与病理结果对照分析后发现,以淋巴结短径≥8 mm、相对强化值≥50 HU及短径≥5 mm且相对强化值≥30 HU作为判断淋巴结转移的标准时MSCT诊断与病理结果一致性相对较好(κ分别为0.809、0.764、0.786)。在不同的腹腔淋巴结分布区域,上述3种诊断标准用于肠旁淋巴结组时,诊断结果与病理结果的一致性较好(κ分别为0.816、0.802、0.800),用在肠系膜中及肠系膜根部淋巴结组时,诊断结果与病理结果的一致性中等(κ分别为0.631、0.673、0.574及0.527、0.626、0.502)。结论 MSCT可根据淋巴结大小、强化差值等参数对结肠癌病人术前淋巴结转移做出判断,从而为评估临床预后提供重要信息。