64层螺旋CT冠状动脉成像技术在冠心病诊断中的价值

临床疑诊及确诊为冠心病患者108例,分别行64层螺旋CT冠状动脉成像扫描和冠状动脉造影(CAC),比较两种方法对血管狭窄程度和斑块显示情况.108例患者共分析了432个支血管,以CAG结果为金标准,64层螺旋CT对冠状动脉病变总的诊断敏感性为94.51%,特异性为94.40%,阳性预测值为92.47%,阴性预测值为95.94%.认为64层螺旋CT可作为一种诊断冠状动脉疾病的非创伤性方法用于临床.     

64层螺旋CT冠状动脉成像在诊断冠状动脉疾病中的临床价值

目的:评价64层螺旋CT冠状动脉成像(64SCTCA)在诊断冠状动脉疾病中的临床价值.方法:收集82例行64层螺旋CT冠状动脉成像并在一周内做冠状动脉造影(CAG)患者,将结果进行对照分析.结果:可用于评估的336支冠状动脉中,SCTCA显示病变共232支,经CAG证实226支;SCTCA诊断冠状动脉病变的敏感性为97.8%,特异性为90.0%,阳性预测值为95.3%,阴性预测值为95.2%.64SCTCA和CAG两种检查方法在发现冠状动脉病变上差异无统计学意义.其中56%(46/82)患有冠心病(1支或1支以上冠脉狭窄>50%),44%(36/82)无明显冠心病或正常(其中<50%狭窄者29例,各支均正常者7例).结论:64SCTCA对于冠状动脉狭窄的评估具有较高敏感性和特异性,适用于冠心病的筛查.     

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。     

64排螺旋CT冠脉成像对老年冠心病诊断价值研究

目的 评价64排螺旋CT冠状动脉成像在老年冠心病诊断中的价值.方法 对460例疑诊老年冠心病患者行64排螺旋CT冠脉成像,2周内行选择性冠状动脉造影(CAG)进行对比,对64排螺旋CT显示的冠状动脉主支及其主要分支情况进行分级评估.结果 460例患者4255支冠状动脉中,显示病变868支,其中781支与CAG结果 吻合,60支64排螺旋CT诊断狭窄而CAG显示正常,另外有2例CAG确诊存在病变而在64排螺旋CT冠状动脉成像未能显示,2种检查方法 在发现冠状动脉疾病方面无统计学差异(P＞0.05).在显示病变程度上,共781支病变在程度上与CAG结果 吻合,准确性为89.98%.结论 64排螺旋CT显示冠脉病变具有较高的敏感性和特异性,对病变的程度评估较为准确,适合用于临床怀疑冠心病的老年患者的筛查.     

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.     

16层螺旋CT冠状动脉成像在冠心病诊断中的应用研究

目的评价16层螺旋CT冠状动脉成像的临床应用价值,探讨提高冠状动脉成像质量的方法。方法40例患者行16层螺旋CT冠状动脉成像,选取图像质量较佳的22例患者,进行选择性冠状动脉造影检查,将两者结果对照分析。结果88支冠状动脉,多层螺旋CT冠状动脉成像(MSCTCA)诊断冠状动脉狭窄的敏感性为86.80%,特异性为86.20%,阳性预测率为76.47%,阴性预测率92.59%,假阳性率13.70%,假阴性率13.30%。对诊断有临床意义的冠状动脉狭窄的敏感性为90.0%,特异性为70.0%,阳性预测率为60.0%,阴性预测率93.3%,假阳性率30.0%,假阴性率10.0%。两者对冠状动脉狭窄诊断差异无统计学意义。结论16层螺旋CT冠状动脉成像技术是一项可靠的冠心病诊断方法,作为一项非创伤性技术,是评价冠状动脉狭窄病变的重要筛选手段。     

冠状动脉CT成像与冠状动脉造影的比较研究

目的 比较16层螺旋CT和冠状动脉造影对冠心病的诊断价值。方法 23例患者行16层螺旋CT冠状动脉成像(回顾性心电门控、0．42s螺旋扫描),并与冠状动脉造影(CAG)对照。结果 在23例患者中,MSCT显示轻度狭窄13处,中度狭窄12处,重度狭窄8处。CAG发现轻度狭窄8处,中度狭窄9处,重度狭窄7处。结论 冠状动脉造影可能低估冠状动脉病变的严重程度,冠状动脉CT成像是对冠心病的早期诊断的有效补充。     

糖尿病胸痛患者64层螺旋CT冠状动脉斑块特点与非糖尿病患者的对比分析

目的分析糖尿病胸痛患者64层螺旋CT冠状动脉斑块特点与非糖尿病患者的对比情况。方法选取该院78例胸痛患者64层螺旋CT冠状动脉造影成像的资料,随机分为实验组(糖尿病组)和对照组(非糖尿病组),每组39例。对照两组患者的冠状动脉斑块的类型和分布特点,评价各组冠状动脉的狭窄情况以及斑块性质。结果对两组患者共计1500段血管进行分析,实验组患者存在斑块236段,而对照组患者存在斑块98段,实验组单支血管病变比例低于对照组,实验组2支及以上血管病变发生率明显高于对照组(P0.05)。实验组病变主要以软斑块和混合斑块为主。结论 64层螺旋CT冠状动脉造影可以清晰的反映糖尿病和非糖尿病胸痛患者动脉斑块之间的差异并且对斑块分布和特征的识别准确率较高。值得临床广泛推广。     

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     

256层CTA技术在冠状动脉硬化狭窄诊断中的应用价值

目的 探讨256层CT血管成像（CTA）技术在冠状动脉成像及其狭窄诊断中的应用价值.方法 选择临床拟诊或疑诊冠状动脉疾病者400例,均行CTA冠状动脉检查,其中53例行DSA冠状动脉造影;由2名医生对图像质量评价,采用分级评分法评价冠状动脉15节段.结果 CTA显示冠状动脉节段共5 793个,其中评分为4、5分5 691个（98.24％）;与DSA比较,CTA诊断冠状动脉狭窄的准确率为94.33％、特异性为93.75％、敏感性为94.59％.DSA与CTA两种检查方法诊断冠状动脉狭窄一致性较好,Kappa为0.868.256层CTA诊断冠状动脉狭窄,在不同心率患者间差异无统计学意义.结论 256层CTA冠状动脉成像质量较高,可清晰地显示冠状动脉主要节段影像,较为准确地诊断冠状动脉狭窄,特异性、敏感性较好,且不受心率影响.     

64层CT与冠状动脉造影在老年冠心病诊断中的对比研究

目的评价64层CT与冠状动脉造影在老年冠心病诊断中的价值。方法70例疑似和确诊的冠心病患者进行64层CT检查,男性45例,女性25例,平均年龄(69.97±9.75)岁,其中50例与冠状动脉造影比较,冠状动脉狭窄>50%。包括曾行冠状动脉旁路移植术5例、冠状动脉内支架置入术10例。平均心率(68.31±6.26)次/min,37例服用美托洛尔12.5~25 mg。64层CT检查与冠状动脉造影检查间隔1~15天。结果50例患者共分析了739个血管节段,200支血管,单支血管病变11例,双支血管病变26例,3支血管病变21例,40例有钙沉积。其中,轻中度钙化(<400分)21例,重度钙化(≥400分)19例。冠状动脉轻度狭窄(≥50%或不规则狭窄)38个节段,中度狭窄(70%~90%)44个节段,重度狭窄(≥90%)44个节段,完全闭塞7个节段。冠状动脉造影7例阴性者,64层CT完全符合。影响诊断因素的3例4个节段因心率>80次/min、呼吸配合不佳出现伪影,4例7个节段严重钙化影响狭窄的判断。敏感性91.7%,特异性97.5%,阳性相关率96.1%,阴性相关率98.6%。结论64层CT可以作为老年冠心病无创检查和治疗初筛的可靠方法。     

Comparison of 16 slice multi-detector computed tomography and breath hold 3D magnetic resonance angiography in the detection of coronary stenosis

Objective To compare 16-slice multi-detector spiral computed tomography (MDCT) and breathhold 3D magnetic resonance (MR) coronary angiography in the visualization of coronary arteries and the accuracy of detecting significant (> 50%) coronary stenoses in patients with suspected coronary artery disease. Methods Forty patients were examined by 16-slice CT (GE, Lightspeed 16) and MR (GE,Twinspeed) within 3 days; 31 of them underwent conventional coronary angiography (CAG) within 2 weeks after CT and MR scan. CT was performed with 16×1.25 mm detector collimation, 0.5 s rotation time and images were reconstructed at 60%-75% of the cardiac cycle. MR was performed with breath hold 3D FIESTA (TR4.0 ms, TE1 .7 ms, flip angle 65, slice thickness 3 mm, FOV 280 mm, matrix 256×192). Mean heart rate was 63±5.8 bpm andβ-blocker was used in 24 patients. MR and CT image quality was evaluated in 9 coronary segments (RCA1, RCA2, RCA3, LM, LAD1, LAD2, LAD3, LCX1, LCX2) using a four-point grading scale. Sensitivity, specificity, positive predictive value, negative predictive value and accuracy were calculated for detection of significant stenosis using CAG as the gold standard. Results 16-slice CT showed higher image quality in most coronary segments except RCA2. Forty-three segments were diagnosed as significant stenosis by CAG, 36 and 27 of these were correctly detected by CT and MR respectively. Sensitivity, specificity, positive predictive value, and negative predictive value of 16-slice CT and MR for detecting significant stenosis were 83%, 84%. 49%, 97%. and 63%, 90%, 55%, 93%, respectively. Conclusion Sixteen-slice CT showed higher image quality in most coronary segments excepted for middle RCA. 16-slice CT had higher sensitivity than MR for detection of coronary significant stenosis, whereas MR had higher specificity than CT. Both CT and MR showed high negative predictive value, which is useful for excluding coronary stenosis in symptomatic patients. (J Geriatr Cordial 2006; 3(1): 24-28)     

冠状动脉256排CT与冠状动脉造影对冠心病的诊断比较

目的冠状动脉256排CT成像技术与冠状动脉造影检查对冠状动脉粥样硬化性心脏病的诊断比较。方法选取2013年5月至2014年5月内蒙古兴安盟人民医院心血管内科疑似冠心病患者50例,其中男性29例,女性21例,年龄37~68岁。先行冠状动脉256排CT扫描及图像后处理,后行冠状动脉造影检查,将两结果进行对比分析。结果以冠状动脉狭窄≥50%者为阳性。冠状动脉256排CT诊断冠心病灵敏度为40.00%,特异度98.18%,阳性预测值88.89%,阴性预测值81.82%,正确指数38.18%,符合率82.67%,KAPPA值46.28%。结论冠状动脉造影诊断冠心病准确性优于冠状动脉CT。冠状动脉CT可对冠心病患者进行初筛诊断。     

64层CT冠状动脉成像技术和冠状动脉造影对冠状动脉疾病诊断的对照研究

目的比较64层计算机断层摄影扫描冠状动脉成像技术(64-slice computed tomography coronaryangiography,64-SCTCA)和冠状动脉造影(coronary artery angiography,CAG)在冠状动脉粥样硬化性心脏病(冠心病)诊断中的价值。方法回顾性分析126例疑似冠心病的患者64-SCTCA和CAG检查资料,并对两组资料进行对比分析。结果 64-SCTCA和CAG检查结果中可用于评价的病变血管段支数比较,差异无统计学意义(P0.05)。CAG共发现≥50%狭窄节段242个,64-SCTCA共发现≥50%狭窄节段199个,两种检查方法对病变狭窄的显示情况比较,差异无统计学意义(P0.05)。全部126例冠心病患者中有91%通过64-SCTCA发现(110/121)。64-SCTCA诊断冠状动脉病变血管的敏感性、特异性、阳性预测值、阴性预测值分别为81.6%、98.8%、79.5%、99%。结论 64-SCTCA可作为冠心病无创、便捷、可靠的检查方法。     

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.     

64层螺旋CT冠状动脉成像在冠心病早期诊断的价值

目的 探讨64层螺旋计算机断层扫描冠状动脉成像（64-slice computed tomographic coronary angiography，CTA）早期诊断冠心病的临床价值。方法 回顾性分析行CTA和冠状动脉造影的临床疑诊冠心病病人65例，以冠状动脉造影结果为标准，评估CTA诊断冠状动脉中重度狭窄（≥50%）的准确性。结果 CTA诊断冠状动脉中、重度狭窄的敏感性、特异性、阴性预测值、阳性预测值和准确度分别为92.7%、91.7%、81.9%、96.9%和92.0%。结论 CTA诊断冠状动脉中、重度狭窄具有较高的准确性，适合用于临床怀疑冠心病的的筛选检查。     

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。     

Multislice computed tomography angiography in the diagnosis of coronary artery disease

Multislice CT angiography represents one of the most exciting technological revolutions in cardiac imaging and it has been increasingly used in the diagnosis of coronary artery disease. Rapid improvements in multislice CT scanners over the last decade have allowed this technique to become a potentially effective alternative to invasive coronary angiography in patients with suspected coronary artery disease. High diagnostic value has been achieved with multislice CT angiography with use of 64- and more slice CT scanners. In addition, multislice CT angiography shows accurate detection and analysis of coronary calcium, characterization of coronary plaques, as well as prediction of the disease progression and major cardiac events. Thus, patients can benefit from multislice CT angiography that provides a rapid and accurate diagnosis while avoiding unnecessary invasive coronary angiography procedures. The aim of this article is present an overview of the clinical applications of multislice CT angiography in coronary artery disease with a focus on the diagnostic accuracy of coronary artery disease; prognostic value of coronary artery disease with regard to the prediction of major cardiac events; detection and quantification of coronary calcium and characterization of coronary plaques. Limitations of multislice CT angiography in coronary artery disease are also briefly discussed, and future directions are highlighted.