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对冠状动脉狭窄的诊断价值分析

目的分析64层螺旋CT对冠状动脉狭窄的诊断价值。方法选取2013年9月—2016年1月黄冈市英山县人民医院收治的冠心病患者80例,均行64层螺旋CT检查和冠状动脉造影检查,以冠状动脉造影检查结果为金标准,分析64层螺旋CT对冠状动脉狭窄的诊断效能。结果 80例患者共发现1 078段病变,其中有180段病变轻微,经64层螺旋CT检查无法评估,其余898段均可评估。99段轻度冠状动脉狭窄中发现斑块60块(60.61%),94段中度冠状动脉狭窄中发现斑块77块(81.92%),222段重度冠状动脉狭窄中发现斑块221块(99.55%)。64层螺旋CT诊断轻度冠状动脉狭窄的灵敏度为74.44%,特异度为98.95%,正确率为94.43%;诊断中度冠状动脉狭窄的灵敏度为85.45%,特异度为99.37%,正确率为97.10%;诊断重度冠状动脉狭窄的灵敏度为96.52%,特异度为98.05%,正确率为96.21%。结论 64层螺旋CT诊断冠状动脉狭窄的灵敏度、特异度、准确率均较高,并可初步判断斑块性质,可作为临床筛查和诊断冠状动脉狭窄的检查方法之一。     

64层螺旋CT冠状动脉血管成像与冠状动脉造影对照研究

目的评价64层螺旋CT诊断冠状动脉粥样硬化性心脏病的临床应用价值。方法40例临床诊断或可疑冠心病患者行64层螺旋CT心电门控平扫及增强扫描,并以冠状动脉造影结果作为对照。得出64层螺旋CT冠状动脉CT血管成像(CTA)诊断冠状动脉狭窄的准确性、敏感性、特异性。结果64层螺旋CT冠状动脉血管成像用于诊断冠心病的敏感性为87.1%,特异性为67.5%,准确性为80.0%。结论①64层螺旋CT检查是一种无创、快捷的冠状动脉血管检查方法,对冠心病的诊断有较高的准确性。②与冠状动脉造影术相比,64层螺旋CT冠状动脉血管成像对冠状动脉血管狭窄程度判断仍有一定差异。     

64层螺旋CT冠状动脉成像在冠脉狭窄诊断中的临床应用

目的探讨64层螺旋CT在冠状动脉狭窄诊断中的临床应用价值。方法入选60名临床上具有高危因素的可疑及已确诊的拟行冠状动脉造影的冠心病人,在有创血管造影前一天进行对比剂增强的64层CT检查,其检查结果与冠状动脉造影结果进行对照。结果共780个节段中,712个节段能满足管腔评价(每例均对冠状动脉的13个节段进行分析),68个节段因严重钙化、运动伪影无法对管腔进行评价。以有创冠状动脉造影结果为金标准,64层CT在检测狭窄程度方面,测定狭窄程度分别<50%、>50%、>75%的病变的敏感性分别是75%、81%、88%,特异性达97%。冠状动脉管壁钙化程度分析显示,同一年龄段人群,冠心病高危组钙化积分明显高于低危组,低危组钙化积分明显高于正常对照组(P<0.01)。结论64层螺旋CT冠状动脉血管成像有较高的诊断准确性,与钙化积分结合可作为评价、筛查冠状动脉狭窄的一种无创检查方法。     

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层螺旋CT与冠状动脉造影诊断冠状动脉狭窄的对比研究

目的评价64层螺旋CT冠状动脉成像(64-slice spiral computed tomographic coronary angiography,64-SCTCA)对冠状动脉各节段狭窄病变的诊断价值。方法85例疑诊为冠状动脉性心脏病(冠心病)患者,先后行64-SCTCA和冠状动脉造影(coronary angiography,CAG)检查,评价64-SCTCA诊断冠状动脉各节段狭窄病变的敏感性、特异性、阳性预测值、阴性预测值和准确性。结果①在CAG可清晰显影的744个节段中,64-SCTCA造影可清晰显示和评价的占639段(85.89%),另外105段(14.11%)显影不清。左主干和前降支可评价节段的比例显著高于左回旋支和右冠状动脉(P0.001),同一支血管中近段可评价的比例显著高于远段(P0.001);②64-SCTCA诊断冠心病的敏感度、特异度、准确度、阳性和阴性预测值分别为96.23%、90.63%、94.44%、93.55%、94.12%。按可评价节段计算,64-SCTCA诊断冠状动脉各节段有意义狭窄病变总的敏感性、特异性、准确性、阳性和阴性预测值分别为89.06%、95.89%、84.44%、95.33%、94.32%;③按可评价节段计算,64-SCTCA对诊断左主干、左前降支、左回旋支和右冠状动脉各节段病变的价值相似,但检测冠状动脉近中段病变的价值高于远段(χ2=4.66,P=0.03)。结论64-SCTCA对冠状动脉狭窄病变有较好的诊断价值,其检测左主干和左前降支病变的价值高于左回旋支和右冠状动脉,对冠状动脉近段病变的诊断价值高于远段,适合于冠心病的筛查。     

64层螺旋CT冠状动脉成像对不典型胸痛冠心病患者的诊断价值

目的评价64层螺旋CT冠脉成像对不典型胸痛患者进行鉴别诊断的价值。方法对72例不典型胸痛患者进行64层螺旋CT冠脉成像,再进行选择性冠脉造影（SCA）,以SCA为标准对64层螺旋CT结果的准确性进行评价。结果64层螺旋CT冠脉成像的敏感度、特异度和准确度分别为96%、79%和90%;64层螺旋CT对中度以上狭窄和轻度狭窄的诊断正确率分别为89%、58%（P<0.01）;64层螺旋CT对左回旋支和右冠状动脉病变的判断能力相对较差。结论64层螺旋CT能够胜任不典型胸痛冠心病患者的筛查。     

64层螺旋CT对冠状动脉狭窄评估的临床应用价值

目的评价64层螺旋CT诊断冠状动脉狭窄的准确性及临床应用价值。方法以管腔直径减小超出50％为标准判定冠状动脉狭窄。对同时接受64层螺旋CT冠状动脉血管成像(computerized tomographic angiography,CTA)和传统冠状动脉血管造影(coronary angiography,CAG)检查的患者31例进行比较,分析64层螺旋CT诊断冠状动脉狭窄的敏感性、特异性和符合率。结果 CTA评价冠状动脉狭窄的敏感性为76．7％,特异性为94．7％,符合率为86．0％。结论 64层螺旋CT 冠状动脉血管成像有较高的诊断准确性,可作为评价冠状动脉狭窄的一种无创检查方法。     

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.     

冠状动脉多层螺旋CT成像及冠脉造影对冠脉搭桥术后桥血管的评价

目的观察冠状动脉多层螺旋CT成像及冠脉造影对冠脉搭桥手术后桥血管的评价作用。方法33例冠脉搭桥手术患者,术前常规冠脉造影检查,手术行不停跳冠脉搭桥术,手术后1 a行冠状动脉多层螺旋CT成像,并于冠状动脉多层螺旋CT成像复查后1周内行冠脉造影检查。结果33例患者共行冠脉搭桥101支,冠状动脉多层螺旋CT成像能够成功显示99支,显示率为98.02%。冠状动脉多层螺旋CT成像与冠脉造影结果对比,其对冠脉搭桥手术后桥血管狭窄和阻塞评价敏感度达100%。结论应用冠状动脉多层螺旋CT成像对冠脉搭桥术后桥血管评价简便、无创,具有较好的可信性和可行性。     

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。     

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 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.     

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 accuracy of noninvasive coronary angiography using 64-slice spiral computed tomography

OBJECTIVES: The aim of our study was to evaluate the diagnostic accuracy of multislice computed tomography (MSCT) coronary angiography using a new 64-slice scanner. BACKGROUND: The new 64-slice MSCT scanner has improved spatial resolution of 0.4 mm and a faster rotation time (330 ms) compared to prior MSCT scanners. METHODS: We studied 70 consecutive patients undergoing elective invasive coronary angiography. Patients were excluded for atrial fibrillation, but not for high heart rate, coronary calcification, or obesity. All vessels were analyzed, including those <1.5 mm in diameter; MSCT lesions were analyzed quantitatively as well as by a qualitative scale and compared to quantitative coronary angiography (QCA). Results were also analyzed for significant coronary stenoses (over 50% luminal narrowing) by segment, by artery, and by patient. RESULTS: All scans showed diagnostic image quality. Of 1,065 segments, 935 (88%) could be evaluated, and 773 of 935 (83%) could be assessed quantitatively by both MSCT and QCA. The Spearman correlation coefficient between MSCT and QCA was 0.76 (p < 0.0001). Bland-Altman analysis demonstrated a mean difference in percent stenosis of 1.3 +/- 14.2%. A total of 26% of patients had calcium scores above 400 Agatston U, 25% had heart rates >70 beats/min, and 50% were obese. Specificity, sensitivity, and positive and negative predictive values for the presence of significant stenoses were: by segment (n = 935), 86%, 95%, 66%, and 98%, respectively; by artery (n = 279), 91%, 92%, 80%, and 97%, respectively; by patient (n = 70), 95%, 90%, 93%, and 93%, respectively. CONCLUSIONS: Our results indicate high quantitative and qualitative diagnostic accuracy of 64-slice MSCT in comparison to QCA in a broad spectrum of patients.     

Accuracy of multislice computed tomography coronary angiography: a pooled estimate

A PUBMED search was performed for peer-reviewed studies published in English from 2002 through August 2006. Accuracy parameters for detection of obstructive coronary artery disease by MSCT (multislice computed tomography) coronary angiography were analyzed on patient and segment basis. Pooled estimates of sensitivity (SN), specificity, positive predictive value, and negative predictive value (NPV) in patient-based analyses were 93%, 82%, 83%, and 92%, respectively. For 64/40-slice MSCT the respective accuracy estimates were 96%, 91%, 93%, and 96% and were better compared with 16-slice MSCT. Also, more segments were evaluated by 64-slice MSCT (96%) compared with 16-slice MSCT (86%). The SN and NPV of MSCT coronary angiography for patients with low coronary artery calcium (CAC) score were 92% and 99% compared with 77% and 89% for patients with high CAC score. The accuracy estimates for MSCT in studying coronary artery by-pass grafts and intracoronary stents showed a SN and NPV of 97% and 97% for graft occlusion or stenosis and only 71% and 93% respectively for in-stent restenosis. Diagnostic accuracy of MSCT coronary angiography has improved with the newer 64-slice versions. High CAC scores can affect the accuracy of MSCT coronary angiography. Although the accuracy of MSCT in evaluating native vessel and graft disease has improved significantly, its reliability in studying intracoronary stents remains uncertain.     

64层螺旋CT冠状动脉成像判定冠状动脉狭窄的价值

目的: 探讨64层螺旋CT冠状动脉成像（MSCTCA）判定冠状动脉狭窄的临床价值。方法: 回顾性研究在我科治疗并于2周内先后行MSCTCA和冠状动脉造影（CAG）的临床拟诊冠心病患者30(男21,女9)例;年龄49～74（62±7）岁,以CAG结果为准,计算评价指标。结果: 依节段计算的MSCTCA准确性,其灵敏度、特异度分别为50%、97%。若去除38个冠脉节段由于严重钙化而影响诊断的因素,则其灵敏度、特异度分别为74%、99%。结论: MSCTCA判断冠状动脉中、重度狭窄具有较高的准确性,对诊断冠心病尤其对筛选冠心病而言有较好的前景,但严重钙化病变影响冠状动脉狭窄程度的判断。     

Impact of coronary calcium score on diagnostic accuracy of multislice computed tomography coronary angiography for detection of coronary artery disease.

BACKGROUND: The impact of the coronary calcium score on the diagnostic accuracy of multislice computed tomography (MSCT) to detect obstructive coronary stenoses remains controversial. METHODS AND RESULTS: We examined 41 patients (mean Agatston score, 340 +/- 530 [range, 0-2546]) with coronary artery disease with 16-slice MSCT and 60 patients (mean Agatston score, 446 +/- 877 [range, 0-6264]) with 64-slice MSCT. MSCT scans were analyzed with invasive coronary angiography (CA) as the standard of reference. Lesions with luminal narrowing of 50% or greater were considered obstructive. In total, 9% and 2% of uninterpretable segments were excluded from analysis in patients examined with 16- and 64-slice MSCT, respectively. On a segment basis, the percentage of false-negative segments in the groups with Agatston scores of 0 to 100, 101 to 400, and greater than 400 with 16-slice MSCT were 0%, 5.3%, and 2.9% (P = .0005), respectively; other comparisons of false-positive and false-negative segments were not significant. The sensitivity and specificity on a vessel and patient basis with 16- and 64-slice MSCT were not significantly different in different calcium score groups. CONCLUSIONS: A slight impact of coronary calcium was observed on the diagnostic accuracy of 16-slice MSCT CA on a segment basis, with no significant impact on a vessel and patient basis. No significant impact of coronary calcium was observed on the diagnostic accuracy of 64-slice MSCT CA on a segment, vessel, or patient basis.     

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.