99m Tc-HL91乏氧显像与硝酸甘油介入99m Tc-MIBI心肌显像检测存活心肌的对比分析

目的 评价99mTc-HL91乏氧显像和硝酸甘油(NTG)介入99mTc-MIBI心肌显像检测急性心肌梗死(AMI)患者存活心肌的临床价值.方法 32例AMI患者在经皮冠状动脉成形术(PTCA)前行99mTc-MIBI心肌显像、99mTc-HL91乏氧显像和NTG介入99mTc-MIBI心肌显像,对比分析99mTc-HL91乏氧显像和NTG介入99mTc-MIBI心肌显像检测存活心肌的准确性.结果 99mTc-HL91乏氧显像和NTG介入99mTc-MIBI心肌显像检测存活心肌的灵敏度、特异性和准确性分别为83.9%,100%,90.2%和72.6%,67.5%,70.6%.存活心肌摄取99mTc-HL91明显高于99mTc-MIBI.两种方法结合检测的灵敏度、特异性和准确性分别为93.5%,100%,96.1%.结论 99mTc-HL91乏氧显像检测存活心肌有较高的临床价值,结合NTG介入99mTc-MIBI心肌显像可进一步提高检测的准确性.     

99mTc-HL91乏氧显像在乳腺癌诊断中的临床应用研究

目的:探讨99mTc-HL91乏氧显像在乳腺癌诊断中的研究与应用.方法:82例乳腺肿块患者分别行99mTc-HL91乏氧显像和99mTc-MIBI亲肿瘤显像,利用计算机感兴趣区(ROI)技术,计算靶/非靶比值(T/N).结果:99mTc-HL91乏氧显像和99mTc-MIBI亲肿瘤显像诊断乳腺癌的灵敏度、特异性和准确率,分别为86.2%、100.O%、91.5%和82.3%、87.1%、84.1%.良、恶性组99mTc-HL91乏氧显像不同时像的T/N值有显著差异.浸润性导管癌、浸润性小叶癌99mTc-HL91乏氧显像不同时像的T/N值无显著性差异.结论:乳腺癌组织对99mTc-HL91和99mTc-MIBI均有明显摄取,呈显著正相关,二者相比较,灵敏度无显著性差异,99mTc-HL91乏氧显像特异性和准确性较高,且肿瘤的病理类型与乏氧程度无直接关系,具有一定的临床应用价值.     

核素心肌灌注显像对扩张型心肌病和缺血性心肌病的鉴别诊断价值

目的探讨^99mTc-MIBI心肌灌注显像（MPI）对扩张型心肌病（DCM）和缺血性心肌病（ICM）的鉴别诊断价值。方法55例确诊心肌病患者,根据病史、超声心动图检查,分成扩张型心肌病组（25例）和缺血性心肌病组（30例）。同时完成核素^99mTc-MIBI心肌灌注显像与冠脉造影（CAG）检查。观察^99mTc-MIBI在心肌的分布情况,分析病损心肌、病变血管之间的关系。结果①所有55例患者,心肌灌注显像都^99mTc-MIBI放射性分布异常：DCM组节段性灌注完全缺损2例（8%）,均匀减低14例（56%）,不均匀减低3例（12%）,花斑样改变6例（24%）;ICM组节段性灌注完全缺损29例（96.67%）,均匀减低1例（3.33%）。冠脉造影检查：DCM组仅1例（4%）发现冠脉异常,但狭窄程度〈50%,ICM组30例（100%）都有不同程度的冠脉狭窄（≥50%）;②以核素^99mTc-MIBI在心肌不均匀减低和/或花斑样分布为标准,MPI诊断DCM的敏感性为96.15%,特异性为95.6%,以核素^99mTc-MIBI在心肌呈节段性灌注完全缺损分布为标准,MPI诊断ICM的敏感性是96.7%,特异性是92%。结论核素^99mTc-MIBI心肌灌注显像在心肌的这种特征性分布,对扩张型心肌病和缺血性心肌病的诊断和鉴别诊断有较高的临床价值,与冠脉造影有很好的相关性,值得在临床推广应用。     

双核素显像在评价AMI患者心肌灌注与活力中的应用

目的探讨201Tl、99Tcm-HL91双核素心肌显像与18F-FDG显像结合99Tcm-MIBI心肌显像在评价急性心肌梗死(AMI)患者心肌代谢及血流灌注中的临床应用价值。方法 对10例AMI患者行10 min和3 h 201Tl与99Tcm-HL91双核素心肌显像,采用17节段分析法来评价201TI显像节段性稀疏缺损与乏氧节段性显影;对25例AMI患者在PCI术后2周行18F-FDG心肌代谢显像及99Tcm-MIBI静息心肌显像,行圆周剖面半定量分析评价局部心肌灌注、代谢与室壁运动功能之间的关系。结果 (1)75％(21／28)的201Tl灌注缺损心肌节段在乏氧显像中该节段显影,提示有存活心肌,7个不显影节段均为下壁节段,99Tcm-HL91显影节段数明显大于201Tl灌注缺损区。(2)AMI患者术后2周心肌运动正常节段(n=284)99Tcm-MIBI％、18F-FDG％分别为83.71％±15.67％和89.40％±13.62％,高于运动减弱组(n=51)的68.45％±17.34％和71.19％±18.56％,高于无运动组(n=65)的32.26％±14.91％和56.08％±18.83％,运动减弱组高于无运动组,3组间差异有统计学意义(P<0.01)。室壁运动评分指数(WMSI)与99Tcm-MIBI缺损百分率呈正相关(r=0.791,P<0.05)。结论201Tl、99Tcm-HL91双核素心肌显像与18F-FDG显像结合99Tcm-MIBI心肌显像均可用于临床判断AMI患者的存活心肌及血流灌注。     

~(99)Tc~m-HL91探测存活心肌的应用研究

目的:研究~(99)Tc~m-HL91在缺血心肌中的显像表现,探讨~(99)Tc~m-HL91探测缺氧但存活心肌的价值。方法:18例已确诊为心肌缺血或心肌梗塞的患者均行99Tcm-MIBI与~(99)Tc~m-HL91心肌灌注SPECT显像。在心脏短轴图像上通过ROI技术,获取缺血靶区(targetarea,T)与正常非靶区(non-targetarea,NT)心肌组织的平均放射性计数,计算T/NT比值,获得99Tcm-MIBI与99Tcm-HL91在局部缺血区与正常心肌组织的放射性比值。结果:99Tcm-HL91SPECT有10例患者在99Tcm-MIBI显像的放射性稀疏或缺损区可见到明显的放射性充填,其余8例患者~(99)Tc~m-HL91显像心肌摄取不高。结论:~(99)Tc~m-HL91可选择性地被存活/乏氧心肌摄取,和99Tcm-MIBISPECT联合应用,可有效提高检测存活心肌的效能。     

多巴酚丁胺、硝酸酯负荷试验18F-FDG双核素心肌代谢显像评价存活心肌的临床意义

目的:探讨多巴酚丁胺、硝酸酯负荷试验18F-FDG核素心肌显像在评价存活心肌中的价值.方法:选择40例陈旧性心肌梗死患者作为研究对象,经多巴酚丁胺、硝酸酯负荷试验后行99mTc-MIBI和18F-FDG心肌双核素心肌显像,并与PET心肌代谢显像对比,评价多巴酚丁胺、硝酸酯负荷试验18F-FDG心肌显像存活心肌检出率和与PET心肌代谢显像的符合率.结果:99mTc-MIBI心肌灌注显像示216个节段灌注减低.多巴酚丁胺、硝酸酯负荷试验18FDG-SPECT显像显示216个节段中有121个节段(56%)灌注(代谢)不匹配,提示心肌存活;95个节段(44%)灌注(代谢)匹配,以心肌坏死为主.而18FDG-PET心肌代谢显像显示216个节段中有128个节段(59%)灌注(代谢)不匹配,提示心肌存活;88个节段(41%)灌注(代谢)匹配,以心肌坏死为主.两组比较,18FDG-SPECT显像与18FDG-PET心肌代谢显像存活心肌的检出率差异无统计学意义(χ2=0.875 3P≥0.05);216个灌注减低心肌节段中,18FDG-SPECT与18FDG-PET得分符合率93%.18FDG-SPECT显像存活心肌检出与PET显像符合率93.7%,无存活心肌检出率与PET显像符合率为80%,两者具有较好一致性.结论:多巴酚丁胺、硝酸酯负荷试验18F-FDG SPEC DISA显像对存活心肌的检出率与FDG-PET显像无明显差别,两者具有很高的符合率.     

静脉溶栓治疗对急性心肌梗死梗死部位存活心肌的影响

目的研究静脉溶栓治疗对急性心肌梗死患者心肌存活状态的影响.方法采用硝酸甘油介入99mTc-MIBI心肌灌注显像的方法,评价37例行静脉溶栓治疗的急性心肌梗死患者梗死部位的存活心肌.结果静息显像中136个节段灌注异常,NTG介入后有81个节段得到不同程度的改善,改善率为59.56%;静息显像平均得分为8.35±3.71,介入显像平均得分为6.05±3.16,两者比较差别有统计学意义(P＜0.001);静脉溶栓再通组存活心肌检出率为76.86%,未通组及常规治疗组为44.44%,再通组明显高于未通组,且有统计学意义(P＜0.01).结论硝酸甘油介入99mTc-MIBI心肌显像可明显提高存活心肌的检出率,成功的溶栓治疗可使梗塞区保留较多的存活心肌.     

硝酸甘油介入心肌核素显像检测存活心肌的意义

目的探讨急性心肌梗死(AMI)与陈旧性心肌梗死(OMI)心肌存活状态的差异。方法应用SPECT对63例Q波MI患者行常规99mTc-MIBI心肌显像(静息显像),隔日舌下含服NTG(1.0mg)后5分钟静注99mTc-MIBI,再行心肌显像(介入显像),其中4例患者行冠脉搭桥术(CABG),3例于CABG术后3月再行心肌显像。结果静息显像中239个节段灌注异常,NTG介入后有97个节段得到不同程度的改善,改善率为40.59%,静息显像平均得分为9.65±4.31,介入显像平均得分为7.75±4.66,两者比较差别有统计学意义(P<0.001)。3例CABG术前检测有改善的6个节段,术后均得到不同程度的改善。AMI组与OMI组1月-6月组,6月-3年组相比较,存活心肌的检出率分别为43.10%,42.80%,35.15%,虽呈逐渐下降,但无统计学意义(P>0.05)。结论NTG介入99mTc-MIBI心肌显像可明显提高存活心肌的检出率,且该方法简便易行,安全可靠。OMI患者亦有存活心肌,也可从血运重建中获益。     

核素乏氧显像评估急性心肌梗死患者预后的价值

目的 探讨99mTc-HL91乏氧显像评估急性心肌梗死(AMI)患者预后的价值.方法 78例AMI患者在治疗前行99mTc-HL91乏氧显像检测心肌活性,并计算梗死心肌的99mTc-HL91摄取率.根据摄取率高低分为高摄取、低摄取和无摄取组,随访1年以上,对3组患者心脏不良事件的发生率进行比较.并根据定性诊断结果分为存活心肌组和坏死心肌组,对组内接受再血管化治疗和药物治疗患者的心脏不良事件发生率进行比较.结果 梗死心肌不同99mTc-HL91摄取比值的3组患者心脏不良事件发生率比较差异有显著性,无摄取组发生率较高,高摄取组发生率较低.存活心肌组内接受药物治疗的患者心脏不良事件发生率明显高于再血管化治疗者,差异有显著性,而坏死心肌组内治疗方法不同,心脏不良事件发生率比较差异无显著性.结论 99mTc-HL91乏氧显像检测存活心肌有助于鉴别AMI高危患者、判断预后,并对指导临床选择治疗方法有一定的应用价值.     

荷脑胶质瘤裸鼠~(99m)Tc-HL91乏氧显像与HIF-1α表达的相关性研究

目的研究脑胶质瘤99mTc-HL91乏氧显像特征以及与乏氧诱导因子-1α（HIF-1α）表达的相关性。方法将10只荷人脑胶质瘤裸鼠分别于腹腔注射99mTc-HL91 2、4、6h后行全身平面显像,计算感兴趣区内肿瘤组织与头部组织放射性计数比值（T/NT）,免疫组织化学方法检测肿瘤组织HIF-1α的表达水平。结果99mTc-HL91乏氧显像各时相肿瘤显影均较清晰,2、4、6h的T/NT值分别为1.415±0.25,1.855±0.20,1.818±0.19,各时相间T/NT值比较差异均有显著性（P〈0.05）。99mTc-HL91显像的T/NT值（4h）与HIF-1α的表达水平呈正相关（r=0.833,p〈0.05）。结论脑胶质瘤组织对乏氧显像剂99mTc-HL91有较好的摄取与滞留,各时相肿瘤显影清晰,其中以4 h的T/NT值为最高。99mTc-HL91乏氧显像的T/NT值与HIF-1α的表达水平呈正相关。     

Detection of Ischemic Myocardium with a New Hypoxic Tissue Targeting Tracer ^99Tc^m-HL91

Theischemicandviablemyocardiumhasim pairedfunction,however,preservedmetabolicac tivity.Theviablemyocardiummayrecoveritscon tractionfunctionafterrevascularization.Neverthe lessfunctionimprovementmaynotbeachievedinmyocardialscarevenafterasuccessfulreperfusion.Itisimportanttodetectviablemyocardiumbeforerevascularizationtherapyinthepatientswithcoro naryheartdiseasesuchascoronaryarterygraftingbypassorpercutaneouscoronaryintervention.Un fortunatelyasimpleandeffectiveassessmenttech niqueforthispurpos…     

Detection of ischemic myocardium with a new hypoxic tissue targeting tracer99Tcm-HL91

Summary The imaging appearances of⁹⁹Tc^m-HL91, a new hypoxic imaging agent, in ischemic myocardium were studied and the value of⁹⁹Tc^m-HL91 in the evaluation of regional ischemic viable myocardium was explored. Acute myocardial ischemia models were made by coronary artery legations in 18 rats and randomly divided into 2 groups:⁹⁹Tc^m-HL91 group and⁹⁹Tc^m-MIBI group. Evan blue infusion during ischemia and TTC staining after operation were used to delineate the area of ischemic and viable myocardium. The isolated heart was sliced in the short axis and then autoradiography was performed. The electron microscopic examination was also done for the myocardial samples.⁹⁹Tc^m-HL91 and⁹⁹Tc^m-MIBI uptake activities (counts/g) were measured in the area of ischemic myocardium (T) and normal myocardium (NT) separately. The uptake ratios of⁹⁹Tc^m-HL91 and that of⁹⁹Tc^m-MIBI in ischemic myocardium were calculated as T/NT. It was found that the normal myocardium was blue and ischemic or infarct myocardium was negative with Evans blue in all experiment rats. Both the normal and ischemic myocardium was in red color with TTC staining. In the⁹⁹Tc^m-HL91 group the ischemic myocardium showed much higher uptake over normal myocardium, that was demonstrated both in the autoradiography and quantitative analysis. The ischemic/normal activity ratios were 1.634±0.354. It was suggested that⁹⁹Tc^m-HL91 might accumulate in ischemic and viable myocardium, which is helpful in the evaluation of hypoxic but viable myocardium and potentially used as a imaging agent to assess myocardial viability. Lü Jiagao, male, born in 1965, Associate Professor     

99mTc-MIBI myocardial perfusion imaging in patients with diabetes]

Seventy-four patients with diabetes were taken on both stress and rest 99m-Tc-MIBI SPECT imaging: 44 patients (59.5%) were found having myocardial ischemic disorders, including 28 cases of myocardial ischemia, 7 cases of myocardial infarction and 9 cases of both conditions. 113 segments were involved and 46% were located in the posterior and inferior walls, indicating that the right coronary artery is most susceptive to ischemia. Diabetic patients complicated hypertension and/or hyperlipidemia were at higher risk of either early occurrence of coronary disease. 99mTc-MIBI SPECT imaging is helpful in early diagnosis and therefore is significant in directing.     

门控18↑F-FDG／99m↑Tc-MIBI双核素显像评价冠脉搭桥术对心功能改善的作用

目的应用门控18↑F—FDG／99m↑Tc—MIBI双核素显像评价陈旧性心肌梗死（MI）患者经冠脉搭桥（CABG）术对心功能改善的作用。方法31例陈旧性心肌梗死（MI）患者在冠脉搭桥术前及4个月后行18↑F—FDG及99m↑Tc—MIBID1SA法显像。将左室心肌分为9个节段,根据术前显像结果分为灌注代谢匹配组（M）和不匹配组CMM）,半定量法分别计算各节段99m↑Tc—MIBI、18↑F—FDG摄取分数F值,评价局部心肌灌注、代谢情况,计算术前术后各种心功能参数包括EF、SV,观察整体心功能改善情况。结果31例患者,共分为279个节段;13例患者含有不匹配的节段108个,术前后99m↑Tc—MIBI、18↑F—FDG摄取分数F值分别为1．714±0．44、1．224±0．31和2．334±0．72、1.504±0．50（P〈0.01）,术前后EF、SV值分别为（28．54±9.4）％、（47．14±17．0）ml和（34．24±9．7）％、（58．814±27．1）ml（P〈0．05）;18例患者含匹配的节段152个,术前后”99m↑Tc—MIBI、18↑F—FDG摄取分数F分别为1．514±0．44、1．234±0．31和1．604±0．50、1．344±0．22（P〉0．05）;术前后EF、SV值分别为（25．34±9、4）％、（45．64±17．0m1）和（26．54±9．7）％、（46．814±27．1）ml（P〉0．05）。结论冠脉搭桥术只能改善有存活心肌细胞的心室功能,而对无存活心肌细胞的心室功能无明显改善作用。     

Quantitative Analysis of the Tomographic Technetium－99m MIBI （~（99m）Tc－MIBI） Myocardial Bullseye Display： Application to Diag

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核素心肌灌注显像在冠心病危险度分层中的临床意义

目的 评价核素心肌灌注显像在冠心病危险度分层中的临床价值及意义.方法 对均进行了核素心肌灌注显像[核素选用99mTc-甲氧基异腈(MIBI),心肌灌注显像采用静息-腺苷药物负荷试验]及冠状动脉(简称冠脉)造影的13例患者进行观察和对比,对核素心肌灌注显像阳性者10例、核素心肌灌注显像阴性者3例与各自的冠脉造影对比,评判核素心肌灌注显像对胸闷、胸痛等不同症状患者心肌缺血程度初步估测,并进行危险评估.结果 核素心肌灌注显像提示严重心肌缺血6例,在相应冠脉造影中均发现冠脉病变多为2支以上,且狭窄程度多在70%以上,均进一步行球囊扩张和(或)支架置入术;提示轻度心肌缺血4例,随后冠脉造影发现多为1支病变,狭窄程度多为50%～70%,均进行药物治疗;另3例核素心肌灌注显像阴性者冠脉造影无明显异常发现.结论 核素心肌灌注显像对冠心病进行危险度分层及选择治疗、评估预后有重要意义.     

THE VALUE OF 99mTc-MIBI MYOCARDIAL PERFUSION SPECT IMAGING IN DETECTING CORONARY ARTERY DISEASE IN PATIENTS WITH VALVULAR DISEASE BEFORE OPERATION

Objective. The aim of this study was to detect coronary artery disease using ^99mTc-MIBI myocardial perfusion imaging in patients with valvular disease. Methods. Thirty patients with valvular disease confirmed by echocardiography underwent ^99mTc-MIBI myocardial perfusion imaging using multiSPECT lh after stress test (exercise, dipyridamole or dobutamine test) and were performed coronary angiography within 1 month before valvular operation. Results. For 29 out of the 30 patients, the results of ^99mTc-MIBI myocardial perfusion imaging were similar with those of coronary angiography, the concordance rate was 96.7 % and the negative predictabili-ty was 100%. Conclusion. ^99mTc-MIBI myocardial perfusion imaging is a reliable non-invasive method for detecting coronary artery disease in patients with valvular disease and so as to draw up suitable operation programs for them.