64层螺旋CT评价冠脉狭窄的应用价值

目的 评价 64层螺旋 CT 在冠状动脉疾病中的诊断价值.方法 选择30例临床疑诊冠心病病人行64层螺旋CT冠状动脉成像和插管法冠状动脉造影检查.以常规冠状动脉造影为金标准,计算64层螺旋CT冠状动脉成像诊断冠状动脉狭窄程度≥50%的敏感度、特异度、阳性预测值、阴性预测值、准确度.结果 64层螺旋 CT诊断冠状动脉狭窄总体敏感度和特异度分别为90.7%、96.2%,阳性预测值和阴性预测值分别为89.5%、96.6%,准确度为94.7%.结论 64层螺旋CT对诊断冠状动脉狭窄具有较高的准确率,是一种无创、简便、安全可靠的冠状动脉血管诊断与筛选方法.     

64层螺旋CT对老年冠状动脉疾病患者的诊断价值评价

目的探讨64层螺旋CT对老年冠状动脉疾病患者的诊断价值。方法对61例疑为冠心病的老年患者进行冠状动脉64层螺旋CT扫描,并于1周之内进行冠状动脉造影检查。以冠状动脉造影为“金标准”,评价冠状动脉64层螺旋CT诊断老年冠状动脉疾病患者的敏感性、特异性、阳性预测值、阴性预测值及准确度。结果61例患者总计915个冠状动脉节段,64层螺旋CT能够评价其中882个节段(96．4％),其检测中度以上冠状动脉狭窄的敏感性75．6％,特异性88．1％,阳性预测值64．0％,阴性预测值92．8％,准确度85．4％。结论64层螺旋CT对老年冠状动脉疾病患者具有较高的诊断价值,有可能成为筛查老年人冠心病的一个较为可靠的无创检测手段     

老年人多层螺旋CT冠状动脉成像诊断冠状动脉狭窄的研究

目的评价64层螺旋CT冠状动脉成像在诊断老年患者冠状动脉狭窄中的临床应用价值。方法回顾性分析39例患者行64层螺旋CT冠状动脉造影的老年患者(>65岁)的影像资料,在15段分段法的基础上,评价每段冠状动脉CT造影的图像质量;以传统X线冠状动脉造影为“金标准”,评价CT血管造影诊断冠状动脉狭窄及其程度的价值。结果多层螺旋CT冠状动脉造影(MSCTA)评价冠状动脉狭窄的敏感度、特异度、阳性预测值和阴性预测值分别为98.9%(90/91)、98.2%(426/434)、91.8%(90/98)和99.8%(426/427)。冠状动脉MSCTA与传统X线冠状动脉造影(CAG)对血管狭窄程度评价具有很好的一致性。结论多层螺旋CT冠状动脉成像在诊断老年人冠心病中具有重要的临床应用价值。     

64层螺旋CT成像与导管法造影检测冠状动脉狭窄的对照研究

目的探讨64层螺旋CT对冠状动脉粥样硬化病变的显示情况及临床价值。方法对69例临床诊断或疑诊冠心病的患者行64层螺旋CT冠状动脉成像检查及导管法冠状动脉造影。冠状动脉管腔内径减少>50%定义为显著狭窄。结果在69例患者冠状动脉的788节段(血管直径≥1.5mm)中,CT图像能够满足管腔评价者为778节段(98.7%),其中64层螺旋CT显示中度或中度以上狭窄(≥50%)的敏感性和特异性分别为81.9%和99.0%,阳性预测值和阴性预测值分别为95.9%和95.1%。如果在方法学上进行校正,敏感性将达91.8%。结论64层螺旋CT显示冠状动脉狭窄的准确性(95.2%)较高,在冠状动脉疾病的初步诊断以及介入治疗的筛选方面,是一种颇具潜力的无创性检查方法,但尚不能完全取代传统的导管法冠状动脉造影。     

64排螺旋CT冠状动脉成像在冠心病诊断中的应用

目的探讨64排螺旋CT冠状动脉成像在诊断冠心病中临床应用价值。方法回顾性分析2006年7月至2009年5月在新疆自治区人民医院心内科住院临床诊断或疑似冠心病患者病历资料120例,全部患者均行64排螺旋CT冠状动脉成像和选择性冠状动脉造影（CAG）,前后时间不超过2周。按照美国心脏学会（AHA）冠状动脉分段法将冠状动脉分为16段,采用目测直径法判断冠脉狭窄程度,以CAG为诊断冠心病（CHD）的＂金标准＂,计算64排螺旋CT检出中度及中度以上（≥50%）冠状动脉狭窄的敏感度、特异度、阳性预测值、阴性预测值和诊断符合率。结果总计1920冠脉节段中有1857（97%）个节段可以同时在CAG与多层螺旋CT（multisli cecomputed tomography,MSCT）上显示及评估。64排螺旋CT显示中度及中度以上冠状动脉狭窄的敏感度、特异度、阳性预测值、阴性预测值、诊断符合率分别为89%、98%、85%、98%、97%。结论 64排螺旋CT其对中度及中度以上的冠脉狭窄具有良好的诊断价值,基本能满足CHD的诊断需要,可作为CHD中危人群的一种初筛手段。     

64排螺旋CT诊断冠状动脉病变的临床价值

目的评价64排螺旋CT用于诊断冠状动脉病变的临床价值。方法连续入选66名冠心病患者，均行64排螺旋CT冠脉三雏成像和冠状动脉造影，以冠状动脉造影的结果为“金标准”，计算64排螺旋CT诊断冠状动脉病变的敏感性，特异性，假阳性率，假阴性率，阳性预测值，阴性预测值。结果对照冠状动脉造影，64排螺旋CT诊断冠脉病变的敏感性为93．02％，特异性为98．21％，假阳性率为1.79％，假阴性率为6．98％，阳性预测值为97．56％，阴性预测值为94．83％。结论64排螺旋CT对于诊断冠脉病变有较好的敏感性与特异性，可用于冠心病患者的筛查。但目前的技术水平和各项技术指标仍有待提高，还无法替代传统的血管造影。     

64层螺旋CT冠状动脉成像分析

目的分析64层螺旋CT冠状动脉成像的图像质量和评价其在冠心病的应用价值。方法采用64层MSCT对疑诊冠心病的患者80例进行冠状动脉成像,分析图像质量,其中38例有CAG作对照,评价诊断冠心病的敏感性、特异性、阳性预测值和阴性预测值。结果 80例患者320支冠脉血管中,300支(93.75%)图像质量为1、2级,为可评估血管,20支(6.25%)图像质量为3级,为不可评估血管。64层螺旋CT冠状动脉成像诊断冠心病的敏感性为92.5%,特异性为95.3%,阳性预测值为93.9%,阴性预测值为94.2%。结论 64层螺旋CT冠状动脉成像可获得优质评价图像,对冠心病有很高的诊断价值,是一种无创筛查冠心病的可靠方法。     

64层螺旋CT诊断不同程度冠状动脉狭窄的临床价值

目的分析64层螺旋CT诊断不同程度冠状动脉狭窄的临床价值。方法选取我院2013年2月~2015年2月收治的患者120例作为研究对象,为保证公平公正的原则,按照随机抽样的方法将患者平均分为实验组与对照组,实验组采用64层螺旋CT诊断,对照组采用常规冠状动脉造影诊断,对两种方法的诊断效果进行对比。结果研究发现,实验组对冠状动脉狭窄的灵敏度、特异度、阳性预测值、阴性预测值均显著优于对照组,差异有统计学意义(P0.05)。结论 64层螺旋CT具有较高的准确度、高灵敏度,且在早期轻度狭窄的诊断中优于常规冠脉造影,在临床中具有重要的价值。     

64层螺旋CT血管成像与冠状动脉造影对冠心病诊断价值的对比研究

目的评价64层螺旋CT在冠状动脉造影方面的诊断价值。方法58例临床诊断或可疑冠心病患者行64层螺旋CT冠状动脉成像检查,分别对左主干、左前降支、回旋支和右冠状动脉及其分支的重建图像行影像学评价,所有患者均行常规选择性冠状动脉造影检查作为对照。结果58例患者共757(87.0%)节段的冠状动脉(血管直径≥1.5 mm)成像,638节段(84.3%)可用于多层螺旋CT和冠状动脉造影定量分析。冠状动脉造影共发现狭窄101节段,多层螺旋CT发现狭窄104节段,多层螺旋CT对冠状动脉狭窄诊断的敏感性为86.1%,特异性为96.8%。结论64层螺旋CT冠状动脉造影可作为诊断冠状动脉病变的一种无创筛选方法。     

多层螺旋CT诊断冠状动脉狭窄的价值和限度

目的 评价多层螺旋CT(MSCT)在冠状动脉狭窄诊断中的价值和限度.方法 临床诊断或可疑冠心病的65例患者接受冠状动脉MSCT检查,采用回顾性心电门控、0.5 s/转的螺旋扫描、单扇区重建算法和静脉注射对比剂,其检查结果与导管法,冠状动脉造影进行对照.结果 在65例患者的冠状动脉889节段(直径≥1.5 mm)中,CT图像满足管腔评价为795节段(占89.4%).对于CT图像满足管腔评价的冠状动脉节段,MSCT对冠状动脉中度和中度以上狭窄(≥50%)诊断的敏感度和特异度分别为88.6%和95.1%,阳性预测值和阴性预测值分别为82.7%和96.9%;MSCT显示冠状动脉高度狭窄(≥75%)的敏感度和特异度分别为90.7%和97.6%,阳性预测值和阴性预测值分别为82.1%和98.9%.结论 如果冠状动脉CT图像满足管腔评价,MSCT对冠状动脉狭窄的诊断准确性很高.MSCT可用于冠状动脉狭窄的初步诊断和介入治疗的筛选.     

Non-invasive coronary computed tomographic angiography for patients with suspected coronary artery disease: the Coronary Angiography by Computed Tomography with the Use of a Submillimeter resolution (CACTUS) trial.

BACKGROUND: Non-invasive coronary angiography by multislice spiral computed tomography (MSCT) is a promising method for the diagnosis of coronary artery disease (CAD). However, the clinical role of this method has not been established for specific patient cohorts. Therefore, the objective of the current prospective, blinded study was to investigate the diagnostic value of coronary MSCT angiography in patients with an intermediate pre-test probability for having CAD when compared with invasive angiography. METHODS AND RESULTS: A total of 243 patients with an intermediate pre-test probability for having CAD were asked to undergo coronary 16- or 64-slice CT angiography before planned invasive angiography from 12 September 2003 to 13 July 2005. The primary end point was defined as the diagnostic accuracy in the detection of significant coronary stenosis (> or =50% lumen diameter reduction) on a per-patient and an 'intention-to-diagnose'-based analysis. Secondary end points comprised per-artery and per segment-based analyses as well as the comparison of diagnostic accuracy of 16- vs. 64-slice MSCT angiography. Of 243 enrolled patients, 129 and 114 patients were studied by 16- and 64-slice CT angiography, respectively. The overall sensitivity, negative predictive value, and specificity for CAD detection by MSCT were 99% (95% CI, 94-99%), 99% (95% CI, 94-99%), and 75% (95% CI, 67-82%), respectively. On a per-segment basis, the use of 64-slice CT was associated with significantly less inconclusive segments (7.4 vs. 11.3%, P < 0.01), resulting in a trend to an improved specificity (92 vs. 88%, P = 0.09). CONCLUSION: In patients with an intermediate pre-test probability for having CAD this large, prospective trial demonstrates that non-invasive coronary CT angiography is a very sensitive method for CAD detection. Furthermore, this method allows ruling out CAD very reliably and safely. Finally, 64-slice CT appears to be superior for CAD detection when compared with 16-slice CT.     

Diagnostic value of the 16-detector row multislice spiral computed tomography for the detection of coronary artery stenosis in comparison to invasive coronary angiography

OBJECTIVES: The aim of this study was to determine the diagnostic accuracy of 16-slice multislice spiral computed tomography (MSCT) of the coronaries and to provide data in a real clinical setting. Previous 16-slice MSCT studies presented data excluding patients with calcification, vessels of < 1.5 or 2 mm, and segments with impaired image quality. By including these data for 16-slice MSCT, a direct comparison with new data from 64-slice MSCT is possible. METHODS AND RESULTS: Sixty two patients with suspected or known coronary artery disease (CAD) were prospectively enrolled and underwent computed tomography angiography (CTA) and invasive coronary angiography (ICA). All vessels were evaluated for the presence of a significant coronary artery stenosis (>50%) using the American Heart Association (AHA) 15-segment model. From the evaluation of 917 segments, sensitivity, specificity, and positive and negative predictive value (NPV) (positive predictive value [PPV] and NPV) for the presence of relevant coronary stenosis were 73, 98, and 71 and 98% per segment and 94, 90, and 91 and 93% per patient, respectively. The influence of age, gender, body surface area (BSA), heart rate (HR), stents, and Ca(2+)-score value was analyzed. High Ca(2+)-score values were the only statistically significant predictor for impaired diagnostic accuracy. CONCLUSIONS: In summary, CTA with evaluation of all vessel segments in a broad spectrum of patients allowed accurate and fast noninvasive coronary artery evaluation, including evaluation of stented segments. These data are very similar to those published recently for 64-slice scanners.     

Diagnostic performance of multislice spiral computed tomography of coronary arteries as compared with conventional invasive coronary angiography: a meta-analysis.

OBJECTIVES: This study was designed to define the current role of multislice spiral computed tomography (MSCT) for the diagnosis of coronary artery disease (CAD) using a meta-analytic process. BACKGROUND: Multislice spiral computed tomography has recently been proposed as an alternative to conventional coronary angiography (CA) for the diagnosis of CAD. METHODS: Using Medline, we identified 29 studies (2,024 patients) evaluating CAD by means of both MSCT (> or =16 slices) and conventional CA before July 2006. After data extraction the analysis was performed according to a random-effects model. RESULTS: The per-segment analysis pooled the results from 27 studies corresponding to a cumulative number of 22,798 segments. Among unassessable segments, 4.2% were excluded from the analysis and 6.4% were classified at the discretion of the investigators, underscoring the shortcomings of MSCT. With this major limitation, the per-segment sensitivity and specificity were 81% (95% confidence interval [CI] 72% to 89%) and 93% (95% CI 90% to 97%), respectively, with positive and negative likelihood ratios of 21.5 (95% CI 13.1 to 35.5) and 0.11 (95% CI 0.06 to 0.21), respectively, and positive and negative predictive values of 67.8% (95% CI 57.6% to 78.0%) and 96.5% (95% CI 94.7% to 98.3%), respectively. As expected, the per-patient analysis has shown an increased sensitivity of 96% (95% CI 94% to 98%) but a decreased specificity of 74% (95% CI 65% to 84%). CONCLUSIONS: Multislice spiral computed tomography has shortcomings difficult to overcome in daily practice and, at the more clinically relevant per-patient analysis, continues to have moderate specificity in patients with high prevalence of CAD. Studies evaluating the diagnostic performance of the newest generation of MSCT, including patients with low to moderate CAD prevalence, will be critical in establishing the clinical role of this emerging technology as an alternative to CA.     

64层螺旋CT血管成像在冠心病诊断中的应用

目的评价64层螺旋CT(MSCT)血管成像在冠心病诊断中的应用价值。方法选择80例冠心病或可疑冠心病患者行心电门控的MSCT冠状动脉成像,在特定工作站完成图像重建,并与冠状动脉造影结果对照,分析64层MSCT冠状动脉成像在诊断冠心病中的应用价值。结果80例患者中共1200个冠状动脉节段,其中1096个冠状动脉节段可供临床诊断分析,104(8．7%)个冠状动脉节段因图像质量差不能进行诊断分析。在所有可供分析的78例患者中MSCT诊断冠心病的敏感度、特异度、阳性预测值、阴性预测值和诊断准确度分别是96．1%、85．2%、92%和92．3%。1096个可供评价的冠状动脉节段中MSCT识别直径狭窄≥50%病变的敏感度、特异度、阳性预测值、阴性预测值分别为93．2%、89．3%、85．6%、95．2%和92．3%。结论64层MSCT冠状动脉成像对冠心病的诊断有良好的准确性。     

320排螺旋CT冠状动脉成像与冠脉造影对冠心病诊断的的对比研究（英文）

目的：探讨320排螺旋CT冠状动脉成像对冠心病诊断的临床应用价值。方法：85例病人先后进行320排螺旋CT冠状动脉成像（SCTCA）和选择性冠状动脉造影（CAG）。以CAG为诊断冠心病（CHD）的＂金标准＂,比较320排螺旋CT检出CHD的敏感度,特异度,阳性预测值,阴性预测值和准确度。结果：320排螺旋CT诊断CHD的敏感性,特异性,阳性预测值,阴性预测值,准确度分别是：95.65%（44/46）、74.36%（29/39）、81.48%（44/54）、93.55%（29/31）、85.9%（73/85）。结论：320排螺旋CT冠状动脉成像是一种简单易行、安全可靠的无创性检查,可作为冠心病的筛选及术后复查的方法。     

Accuracy of 64-slice computed tomography for the preoperative detection of coronary artery disease in patients with chronic aortic regurgitation

We studied the diagnostic accuracy of 64-slice computed tomography for the diagnosis of significant coronary artery disease (CAD) compared with conventional coronary angiography (CA) in patients with chronic aortic regurgitation (AR) referred for elective aortic valve surgery. Fifty consecutive patients with chronic AR (38 men, mean age 54 +/- 14 years) scheduled for valve surgery underwent 64-slice computed tomographic (CT) coronary angiography and CA. Significant stenosis was defined as a luminal diameter decrease >50%. Mean heart rate during CT scanning was 65.5 +/- 7.4 beats/min. Mean Agatston score was 136 +/- 278 (range 0 to 1207); prevalence of significant CAD in the study population was 26% (13 of 50 patients). Thirteen of 742 segments (1.8%) in 3 patients were considered nondiagnostic with computed tomography because of motion artifacts (n = 9) or calcium (n = 4). In a patient-based analysis taking nonevaluative segments as falsely positive, sensitivity, specificity, and positive and negative predictive values of computed tomography were 100%, 95%, 87%, and 100%, respectively. Preoperative CA could have been avoided in 70% of patients (35 of 50), CA would have been performed to confirm the CT diagnosis in 26% (13 of 50), and unnecessary CA would have been performed in 4% (2 of 50) on the basis of false-positive CT ratings. In conclusion, 64-slice CT coronary angiography provides high diagnostic accuracy for diagnosing significant CAD in patients with chronic AR and may be used as a filter test before valve surgery to decide whether CA should be performed.     

64排螺旋CT冠状动脉成像在冠状动脉病变诊断中的临床研究

目的探讨和评价64排螺旋CT（MSCT）在冠心病诊断中的有效性。方法选取在3周内行64排MSCT和冠状动脉造影（CAG）检查的临床可疑或确诊冠心病的患者（两项检查平均间隔时间9d）114例，其中男性62例，平均年龄65岁。将MSCT和CAG检查结果进行分析，管腔狭窄≥50％定义为明显狭窄。结果在114例患者中，CAG检出至少有1处明显狭窄的患者106例，其中单支病变占33％（38例），多支病变占60％（68例）。MSCT检出其中的104例（诊断准确度95％）。按节段分析，MSCT诊断冠状动脉明显狭窄的灵敏度、特异度、阳性预测值、阴性预测值分别为87％、96％、86％、96％。以各冠状动脉分析，MSCT诊断冠状动脉明显狭窄的灵敏度、特异度、阳性预测值、阴性预测值分别为96％、94％、95％、96％。MSCT与CAG在发现冠状动脉明显狭窄上差异无统计学意义（P〉0．05）。结论64排MSCT诊断冠状动脉狭窄的准确度较高，作为一种冠心病诊断的无创筛查手段，有广泛的临床应用价值。     

Diagnostic performance of 64-slice computed tomography coronary angiography to detect significant coronary artery stenosis

OBJECTIVE: We aimed to determine the diagnostic accuracy of 64-slice multi-slice computed tomography (MSCT) to detect significant coronary artery stenosis with comparison to conventional coronary angiography (CCA). METHODS: In 100 patients (70 men, average age 58 +/- 10 years and age range 31-75 years) scheduled to have conventional coronary angiography, MSCT was performed before catheterization (within 2 months). All patients were in sinus rhythm, able to hold breath for 15 seconds, and had serum creatinine levels < 1.5 mg/dl. MSCT scans were analysed by a radiologist and a cardiologist. Sensitivity, specificity, positive and negative predictive values for the detection of significant stenoses by MSCT in comparison with CCA were calculated on patient, vessel, and segmental bases. RESULTS: 64-slice computed tomography is able to detect significant coronary artery stenosis on a segmental basis with a sensitivity of 88% and specificity of 99% when compared with CCA. All patients with significantly stenotic coronary artery disease are correctly diagnosed. The presence of significant stenosis was correctly diagnosed by MSCT in 126 of 144 segments. Twelve non-significant lesions on CCA were overestimated by MSCT. On vessel-based analysis, the sensitivity and specificity of MSCT for detecting significant stenosis were 91% and 97%, respectively. CONCLUSION: Our results indicate that 64-slice computed coronary angiography is a reliable diagnostic modality for the detection of significant coronary artery stenosis in patients with sinus rhythm and scheduled to have CCA, but still has limitations of diagnostic performance on a per-segment and per-vessel basis.     

Diagnostic value of 16-slice multidetector computed tomography in symptomatic patients with suspected significant obstructive coronary artery disease

We investigated the diagnostic value and limitations of 16-slice multidetector computed tomography (MDCT) to detect significant obstructive coronary artery disease in symptomatic patients. A total of 43 symptomatic patients underwent conventional coronary angiography and 16-slice multidetector computed tomography for the detection of significant obstructive coronary artery disease. The diagnostic value and limitations of 16-slice multidetector computed tomography to detect significant coronary stenoses were determined by analyzing all coronary arteries and proximal segments, both including and excluding unevaluable segments. Analysis of all 592 coronary artery segments demonstrated moderate sensitivity (67%) and positive predictive value (69%), with a high specificity (95%) and negative predictive value (94%) for the detection of significant coronary artery stenoses. When the unevaluable segments had been excluded, with the analysis of all evaluable segments, proximal segments, and evaluable proximal segments, sensitivity increased (71%, 77%, and 83%, respectively), and high specificity (95%, 96%, and 96%, respectively) and negative predictive value (95%) were maintained. When we repeated the analysis taking only the patients into account, 16-slice MDCT correctly diagnosed 88% of all patients but a moderate negative predictive value (63%) was obtained. Artifacts caused by cardiac motion were the most frequent reason for unevaluable segments. Calcification was the leading cause of degraded image quality and incorrect diagnosis. Our results demonstrated that 16-slice MDCT has a moderate diagnostic value for the correct diagnosis of symptomatic patients with significant coronary artery disease. This result suggests that 16-slice MDCT may not be able to exclude significant coronary artery disease reliably in patients at high risk.