~(99m)Tc-ECD脑显像定量分析对小儿原发性癫痫病灶定位诊断的研究

目的：采用相对定量分析法评估９９ｍＴｃ－ＥＣＤ脑血流灌注显像对小儿原发性癫痫定性和病灶定位的诊断价值。方法：２１例ＣＴ检查正常的小儿原发性癫痫病人进行９９ｍＴｃ－ＥＣＤ脑显像和相对定量分析，并同步进行ＥＥＧ检查。结果：２１例病人ＳＰＥＣＴ显像１８例异常，３例正常，阳性率８５７％，假阴性１０％，１８例脑显像异常患儿中，１６例局部脑血流（ｒＣＢＦ）减少，９９ｍＴｃ－ＥＣＤ摄取率７２６±８９％，２例在额叶有限局性ｒＣＢＦ增加，９９ｍＴｃ－ＥＣＤ摄取率分别为１４９５％和１３０９％。ＥＥＧ检查２１例病人２０例异常，１例正常，阳性率９５２％，能定位诊断的７例，定位率为３５％。结论：９９ｍＴｃ－ＥＣＤ脑显像相对定量分析法对小儿原发性癫痫病灶的定位有临床意义，优于ＥＥＧ。     

彩色室壁动力分析——多巴酚丁胺负荷超声心动图对冠心病诊断价值的研究

目的：评估彩色室壁动力分析－多巴酚丁胺负荷超声心动图（Ｃｏｌｏｒ Ｋｉｎｅｓｉｓ－Ｄｏｂｕｔａｍｉｎｅ Ｓｕｒｅｓｓ Ｅｃｈｏｃａｒｄｉｏｇｒａｐｈｙ，ＣＫ－ＤＳＥ）对诊断冠心病（ｃｏｒｏｎａｒｙ ｈｅａｒｔ ｄｉｓｅａｓｅ，ＣＨＤ）的准确性。方法：以冠状动脉造影（ｃｏｒｏｎａｒｙ ａｎｇｉｏｇｒａｐｈｙ，ＣＡＧ）为标准，采用ＣＫ－ＤＳＥ检测了５０例可疑ＣＨＤ患者。结果：ＣＫ－ＤＳＥ诊断ＣＨＤ的敏感性、特异性、准确性、阳性预测值和阴性预测值分虽为９２．６％、７８．３％、８６％、８３．３％和９４．２％。结论：ＣＫ－ＤＳＥ诊断ＣＨＤ安全、准确、客观。     

~（99m）Tc—MIBI心肌灌注显像对冠心病的诊断价值──附80例冠状动脉造影对照

本文报告国产９９ｍＴｃ—ＭＩＢＩ心肌灌注断层显像８０例与冠状动脉造影（ＣＡ）对照分析。结果表明：９９ｍＴｃ—ＭＩＢＩ心肌灌注断层显像对冠心病诊断的灵敏度９６．７％、特异性为７５％、准确性为９１．３％、阳性预测率９２．１％。对急性或陈旧性心肌梗塞、心绞痛及Ｘ综合症的心肌灌注显像阳性率分别是１００％、９３．９％和８３．３％。心肌灌注显像所示异常部位与ＣＡ检查冠状动脉供血区基本相符，有较可靠的定位准确性，心肌灌注显像放射性分布与冠状动脉狭窄程度亦有一定相关性。     

^99mTc—tetrofosmin SPECT显像评价脑肿瘤的临床研究

目的：探讨９９ｍＴｃ－ｔｅｔｒｏｆｏｓｍｉｎ（ＴＦ） ＳＰＥＣＴ显像对脑肿瘤诊断的临床价值。方法：在２８例ＣＴ或ＭＲ示脑占位性病变患者中,术前１周内进行脑９９ｍＴｃ－ＴＦ　ＳＰＥＣＴ显像,其中１７例还进行了２～３小时的延迟显像,观察病变部位９９ｍＴｃ－ＴＦ的摄取变化情况,并进行定性和半定量分析,即在横断面或冠状面图像上寻找肿瘤区摄取放射性最高的断面,画取肿瘤部位和相应对侧部位同样大小的感兴趣区（ＲＯＩ）,计算肿瘤摄取比值（ＴＵＲ）。结果： ２５例９９ｍＴｃ－ＴＦ ＳＰＥＣＴ断层显像病灶处ＴＦ摄取不同程度的增高,３例未见ＴＦ摄取。半定量分析结果显示：１７例早期和延迟显像肿瘤病灶的ＴＦ、ＴＵＲ分别为２．３４ ±０．４１和２．０６±０．２９、未见明显变化（Ｐ＞０．０５）。Ⅲ－Ⅳ级胶质瘤的ＴＦ、ＴＵＲ（２．４４±０．１４）与Ⅰ～Ⅱ级胶质瘤的ＴＦ、ＴＵＲ（１．４６±０．３６）,两者有显著差异（Ｐ＜０．０１）,诊断灵敏度为８９．３％。结论：９９ｍＴｃ－ＴＦ ＳＰＥＣＴ显像在脑肿瘤诊断上有一定的临床价值,特别是在区分脑胶质瘤的恶性程度上。     

冷诱导心肌SPECT与UCG对诊断系统性硬皮病心肌损害的 …

目的：探讨ＳＰＥＣＴ心肌显像和超声心动图（ＵＣＧ）冷诱导对诊断系统性硬皮病（ＳＳＣ）心肌损害的临床价值。方法：应用＾９９ｍＴｃ－ＭＩＢＩ对２３例ＳＳＣ病人进行ＳＰＥＣＴ心肌显像冷诱导,并同期进行ＵＣＧ冷诱导检测。结果：（１）１４例病人（６０．９％）,至少有一处心肌放射性分布异常,４例病人（１７．４％）于ＵＣＧ示局部室壁运动低下,Ｐ〈０．０５。（２）ＳＰＥＣＴ阳性率在雷诺现象（ＲＰ）组和无ＲＰ组之间     

核素心肌断层显像对老年冠心病诊断价值的探讨

对６８例老年人核心素心肌断层显像进行了分析，其中正常人２７例，非冠状动脉化性心脏病１０例，冠心病心绞痛１９例，陈旧性心肌梗塞１２例，除２７例正常人外，均作了冠状动脉造影，结果显示，ＳＰＥＣＴ诊断老年冠心病的敏感性为９６．７７％，特异性为８１．０８％，ＳＰＥＣＴ阴性者患ＣＨＤ的可能性很小，ＳＰＥＣＴ阳性者需排除非冠心病的可能。     

运动、巯甲丙脯酸与巯甲丙脯酸运动肾显像检测原发性高血压的肾功能

目的：观察和分析运动（ＥＸ）、巯甲丙脯酸（ＣＡＰ）及巯甲丙脯酸运动（ＣＡＰ－ＥＸ）介入对轻中度原发性高血压（ＥＨ）患者肾功能的影响。方法：１０例正常志愿者和１５例轻中度原发性高血压患者,在１个月内完成基础双核素肾显像（ＢＳ－ＲＳ）、运动双核素肾显像（ＥＸ－ＲＳ）、巯甲丙脯酸双核素肾显像（ＣＡＰ－ＲＳ）及巯甲丙脯酸运动双核素肾显像（ＣＡＰ－ＥＸ－ＲＳ）４次检查。图像均按ＡＤＡＣ公司提供的计算机软件进行处理。结果：ＥＸ和ＣＡＰ－ＥＸ介入,ＧＦＲ,ＥＲＰＦ均明显降低（Ｐ＜００１）;而ＣＡＰ介入未见明显变化。ＥＨ组与对照组相应方法间ＧＦＲ,ＥＲＰＦ不存在显著差异（Ｐ＞００５）。１５例ＥＨ患者中,基础肾显像及巯甲丙脯酸肾显像结果均正常,而４０％（６／１５）的患者出现异常运动肾图,３０％（５／１５）出现异常巯甲丙脯酸运动肾图,二者同时异常的有５例,其中１例于ＣＡＰ－ＥＸ－ＲＳ介入时,异常更加明显,均表现为对称性的１３１Ｉ－ＯＩＨ和９９ｍＴｃ－ＤＴＰＡ排泄延迟,１３１Ｉ－ＯＩＨ肾图和９９ｍＴｃ－ＤＴＰＡ肾图曲线宽大,排泄段抬高。上述异常变化在１３１Ｉ－ＯＩＨ和９９ｍＴｃ－ＤＴＰＡ肾图曲线中,以９９ｍＴｃ－ＤＴＰＡ肾图     

^99mTc—NOET心肌显像动物实验的初步研究：与^201Tl显像？…

目的：研究狗的＾９９ｍＴｃ＝ＮＭＯＥＴ心肌显像特征。材料与方法：正常狗３只、心肌缺血和梗塞狗各一只,进行＾９９ｍＴｃ－ＮＯＥＴ系列ＳＰＥＥＣＴ显像,与＾２０１Ｔｌ显像及组织学结果比较。结果：１５分钟狗心肌即可清晰显示,但下壁心肌影像受肝影响,且随时间递增而明显。＾９９ｍＴｃ－ＮＯＥＴ有再分布特征,再分布的存在是心肌存 指征。心肌对＾９９ｍＴｃ－ＮＯＥＴ摄取量可以反映心肌的产     

静息~(99m)Tc-MIBI门控心肌断层显像STR在冠心病诊断中的意义

冠心病（ＣＡＤ）冠状动脉狭窄程度对局部心肌血流灌注及局部心肌收缩功能的影响,在ＣＡＤ的诊断、治疗中具有重要意义。 Ｙａｍａ ｓｈｉｔａ等应用正电子发射计算机辅助断层显像方法（ＰＥＴ）研究显示心肌局部室壁收缩增厚率（ＳＴＲ）与心肌局部血流灌注状态及局部心肌代谢状态呈良好的相关关系［２］,而后二者与支配局部心肌的冠状动脉狭窄程度及局部室壁的收缩功能密切相关,本研究应用静息９９ｍＴｃ－ＭＩＢＩ门控心肌断层显像方法,通过测定舒张末期（ＥＤ）和收缩末期（ＥＳ）局部心肌放射性计数的变化,计算ＳＴＲ,探讨心肌局…     

核素心肌显像的临床应用

心肌显像对于探测心肌梗塞、一过性心肌缺血及其它心肌疾病的诊断是一种无创性简便、灵敏的方法。特别是继２０１ＴＩ之后９９ｍＴＣ—ＭＩＢＩ已被广泛用于心肌断层显像，一些新的显像剂也不断进入临床研究。心肌ＳＰＥＣＴ显像已不只是被用于诊断冠心病，它在冬眠心肌的检测，冠状动脉再血管化的应用已得到临床公认。定量分析心肌灌注ＳＰＥＣＴ显像是将来方法学上的重点研究方向。心肌代谢、１２３Ｉ—ＭＩＢＧ等显像对预后估价、疗效判定、合理选择冠状动脉再血管化的适应症等是心肌ＳｔＥＣＴ的临床应用发展方向。     

Technetium-99m-labelled HL91 and technetium-99m-labelled MIBI SPECT imaging for the detection of ischaemic viable myocardium: a preliminary study

Purpose: The assessment of myocardial viability has become an important aspect of the diagnostic and prognostic work‐up of patients with coronary artery disease. Technetium‐99m labelled sestamibi (^99mTc‐MIBI) myocardial perfusion imaging may underestimate the viability of ischaemic myocardium. Technetium‐99m labelled 4,9‐diaza‐3,3,10,10‐tetramethyldodecan‐2,11‐dione dioxime (^99mTc‐HL91) is a hypoxia‐avid agent which can identify acutely ischaemic viable myocardium in a canine model using a standard gamma camera. The aim of this study was to evaluate uptake character of ischaemic viable myocardium and diagnostic performance of single‐photon emission computed tomography (SPECT) imaging by ^99mTc‐HL91 and ^99mTc‐MIBI in detecting ischaemic viable myocardium in coronary heart disease. Methods: A total of 41 patients with coronary artery disease were recruited from March 2008 to May 2009. For detecting ischaemic viable myocardium, SPECT imaging by ^99mTc‐HL91 and ^99mTc‐MIBI were performed in all patients before coronary revascularization. Six patients with single ischaemic myocardial segment received a 2‐day SEPCT/CT imaging protocol and the uptake of ^99mTc‐HL91 in ischaemic myocardium was quantitatively analysed. The remaining 35 patients received a 1‐day ^99mTc‐HL91 and ^99mTc‐MIBI SPECT imaging protocol. Resting ^99mTc‐MIBI myocardial perfusion imaging in 3–18 months after revascularization was used as the standard methodology to evaluate the myocardial viability. Results: In 41 patients, 66 ischaemic myocardial segments were proven to be viable and 12 to be necrotic by resting ^99mTc‐MIBI myocardial perfusion imaging after coronary revascularization. Furthermore, 60 viable segments with negative uptake of ^99mTc‐MIBI showed positive uptake of ^99mTc‐HL91. The remaining six viable segments and 12 necrotic segments showed both negative uptake of ^99mTc‐HL91 and ^99mTc‐MIBI. The sensitivity, specificity, accuracy, Younden Index, positive predictive value and negative predictive value for evaluating ischaemic viable myocardium were 90·9%, 100%, 92·3%, 90·9%, 100% and 66·7%, respectively. Ischaemic viable myocardium had the negative ^99mTc‐MIBI uptake and positive ^99mTc‐HL91 uptake, which demonstrated a mismatched uptake character. Quantitative analysis indicated the uptake of ^99mTc‐HL91 in viable myocardium was increasing in the first 1–3 h and remained stable at the 3–4 h after injection. Conclusion: Functional SPECT imaging with ^99mTc‐HL91 and ^99mTc‐MIBI can be used to detect the seriously ischaemic but viable myocardium with a mismatched uptake character. The uptake of ^99mTc‐HL91 in the viable myocardium reached a stable level at 3–4 h after injection.     

硝酸甘油~(99m)Tc-MIBI心肌断层显像对冠心病的诊断价值

目的 :探讨硝酸甘油99m Tc -甲氧基异丁基异腈 (MIBI)心肌断层显像对冠心病的诊断价值。方法 :对 80例疑冠心病 (CHD)患者进行静息和硝酸甘油99m Tc -MIBI心肌显像 ,并以冠状动脉造影 (CAG)对照。结果 :硝酸甘油99m Tc -MIBI心肌显像诊断CHD的敏感性为 95 2 % ,特异性为 86 8% ;诊断单支、双支及三支病变的敏感性分别为 92 6%、10 0 %、10 0 %。结论 :99mTc -MIBI心肌断层显像对CHD诊断准确率较高 ,值得临床广泛应用     

Discordance between dipyridamole stress technetium-99m tetrofosmin single photon emission computed tomography and coronary angiography in patients with Kawasaki disease

Kawasaki disease (KD) is an acute vasculitis syndrome of unknown etiology that mainly affects the coronary arteries. The purpose of this study was to assess the agreement between dipyridamole stress technetium-99m tetrofosmin (Tc-TF) myocardial perfusion single photon emission computed tomography (SPECT) and coronary angiography in these patients. Twenty-nine children with KD were included in this study. All of the 29 children also received dipyridamole stress Tc-TF myocardial perfusion SPECT within 1 month of their coronary angiographic studies. The results showed that (1) 89.7% of children had negative coronary angiographic findings without significant coronary stenoses, and 10.3% of children had positive coronary angiographic findings with significant coronary stenosis; (2) 44.8% of children had negative Tc-TF myocardial perfusion SPECT findings without abnormal myocardial perfusion, and 55.2% of children had positive Tc-TF myocardial perfusion SPECT findings with abnormal myocardial perfusion; (3) 44.8% of children had both normal coronary angiographic and Tc-TF myocardial perfusion SPECT findings, and 10.3% of children had both abnormal coronary angiographic and Tc-TF myocardial perfusion SPECT findings; and (4) There was no significant agreement between coronary angiographic and Tc-TF myocardial perfusion SPECT findings. We concluded that poor agreement exists between coronary angiographic and Tc-TF myocardial perfusion SPECT findings with coronary stenoses and abnormal myocardial perfusion in children with KD.     

99mTc-MIBI心肌断层显像与冠状动脉造影诊断冠心病的对比分析

目的:探讨99mTc-MIBI心肌断层显像(SPECT)诊断冠心病(CAD)的临床价值。方法:60例患者同时进行99mTc-MIBI心肌断层显像(SPECT)和冠状动脉造影(CAG)检查,将结果进行对比分析。结果:以CAG为标准,SPECT诊断冠心病的敏感性93·18%,特异性50%,准确性指数81·67%,阳性预测值83·67%,阴性预测值72·73%。结论:SPECT与CAG从不同的角度诊断CAD符合率高。若CAG阳性则冠心病诊断成立,CAG与SPECT均阴性,可排除冠心病。     

A Reverse Perfusion Pattern During Technetium-99m Stress Myocardial Perfusion Imaging Does Not Predict Flow Limiting Coronary Artery Disease

BACKGROUND: A reverse redistribution pattern during myocardial perfusion imaging is most widely described using thallium (Tl-201), when stress images exhibit greater perfusion than rest. Technetium (Tc-99 m) radiopharmaceuticals may also yield a reverse perfusion (RP) pattern, but its significance is uncertain. This study tested the hypothesis that RP correlates with the presence and location of flow limiting coronary stenosis(es). METHOD: We reviewed 842 consecutive Tc-99 m tetrofosmin SPECT stress studies performed at a cardiothoracic centre over a 15 month period. 69 (8.2%) demonstrated RP. Thirty-three patients (age 32-79 mean 56, 17 female) had undergone cardiac catheterisation within 12 months of the scan. Correlation was sought between the presence and location of angiographic stenoses and RP pattern. RESULTS: 10/33 (30.3%) had significant (>60%) coronary stenosis(es); 5 single-vessel, 2 two-vessel and 3 three-vessel disease (3VD). Stenosis location correlated poorly with the RP territory (LAD/Anterior 5/17, RCA/Inferior 1/10, Cx/lateral 0/4 (p = 0.57)). Of the 6 patients with a lesion in the RP territory, 3 had 3VD; 2 of these had a simultaneous reversible defect. All 5 patients with previous myocardial infarction had a simultaneous fixed defect. However only 3/12 with co-existent reversible defects had significant disease. CONCLUSION: The reverse perfusion pattern is a poor predictor of flow limiting coronary disease, and does not correlate with stenosis location in those with significant lesions. Such patients should not undergo invasive investigation purely on the basis of this result.     

The Acute Administration of Trimetazidine Modified Myocardial Perfusion and Left Ventricular Function in 31 Patients with Ischaemic Ventricular Dysfunction

Trimetazidine (TMZ) increases the mithocondrial oxidative metabolism and improves Tc-99m sestamibi uptake in myocardial single photon emission tomography (SPECT). The aim of this study was to evaluate whether the acute administration of TMZ improved myocardial perfusion and modified left ventricular ejection fraction (LVEF) in ischaemic left ventricular impairment. METHODS: Thirty-one patients (23 males, age 66 years) with prior myocardial infarction (>6 months) and echocardiographic LVEF < or = 45% underwent coronary angiography, rest basal myocardial SPECT (after 3-day placebo administration) and rest TMZ myocardial SPECT [after 3-day TMZ administration (60mg/die)]. The left ventricle was analysed in 16 segments. The summed placebo score (SPS) and the summed TMZ score (STS) were calculated with a 5-point scale (from 0 = normal uptake to 4 = absent uptake) by two blinded operators. The GATED Tc-99m SPECT was always provided. RESULTS: After TMZ administration GATED LVEF improved from 26.5+/-9.7% to 29.1+/-11.3% (p = 0.04) and left ventricular end-systolic volume (LVESV) was reduced from 90.2+/-40.7 to 85.6+/-39.2 ml/mq (p = 0.006). Similarly the addition of TMZ to myocardial SPECT significantly reduced the STS compared to SPS (21.5+/-11 vs. 26.6+/-10.5 p = 0.0001). Eleven patients (35.5%) had an echocardiographic LVEF < or = 30%; in these patients who had severe ventricular dysfunction, GATED LVEF and LVESV did not change after TMZ (20.2+/-5.7% vs. 21+/-6.9% p =0.6; 116.7+/-35.3 ml vs. 112.6+/-32.3 ml p = 0.08, respectively). CONCLUSION: In comparison with placebo, the addition of TMZ to myocardial Tc-99m tetrofosmin SPECT improved myocardial perfusion and LVEF, reducing LVESV. These effects were lost in patients with more severe ventricular dysfunction.     

Prognostic value of nitrate enhanced Tc99m MIBI SPECT study in detecting viable myocardium in patients with coronary artery disease

Background: Assessing the viability in akinetic myocardium is vital for predicting functional recovery after therapeutic management in patients with chronic coronary artery disease (CAD) and depressed left ventricular (LV) function. The present study aimed to evaluate the efficacy of Tc99m MIBI SPECT enhanced with nitroglycerine infusion in detecting myocardial viability, as well as to asses the relationship between the myocardial viability and the subsequent treatment and outcome of patients. Methods and results: Sixty-seven consecutive patients with CAD and LV dysfunction (LV ejection fraction 36.6 ± 8.4%) underwent Tc99m MIBI imaging – at rest and during intravenous nitroglycerine infusion – for viability assessment. Fourteen patients were treated pharmacologically (Group I), and fifty-three (Group II) were submitted to coronary revascularization (PTCR or CABG). Fifteen major cardiac events were observed during 25 months of the follow-up. A significantly worse event-free survival was registered in the subjects of Group I than in Group II subjects. The prognostic predictors of cardiac events were: (1) the number of viable, non-revascularized segments in perfusion imaging (p < 0.001), (2) the severity of the disease assessed by coronary angiography (p < 0.05). Conclusions: Viability detection in nitroglycerine infusion enhanced Tc99m MIBI imaging offers significant prognostic value in patients with CAD after myocardial infarction. Patients with preserved viability showed better prognosis after revascularization than those treated pharmacologically.     

Quantitative imaging of myocardial infarct in rats with high resolution pinhole SPECT

Small animal imaging of cardiovascular disease using single photon emission tomography (SPECT) can be used to provide quantitative measurements of myocardial infarct. The purpose of this study was to demonstrate the accuracy of pinhole SPECT imaging with [^99mTc]sestamibi for estimation of infarct size in a rat model of coronary artery disease. Nine rats had their left anterior descending artery ligated to induce a region of myocardial infarct. These animals were injected with 37 MBq [^99mTc]sestamibi, and, 1 h later, scanned on a pinhole SPECT system for 30 min. The defect size measured with SPECT, which was dependent on a threshold applied to the short axis circumferential profiles, was compared against the gold standard triphenyltetrazolium chloride (TTC) staining. The size of the perfusion deficit measured using [^99mTc]sestamibi SPECT compared very favorably with the TTC staining result, for threshold values in the range 50–70%. The optimum threshold was approximately 70%, giving an excellent correlation (R ²=0.89, p<0.001). Estimation of infarct size by [^99mTc] sestamibi SPECT yielded an excellent agreement with TTC staining. In conclusion, measurement of myocardial infarct with SPECT can be used to study the rat heart in vivo, and provides a quantitative measure of myocardial viability.     

18F-FDG SPECT/CT与99Tcm-MDP骨显像对肺癌骨转移诊断价值的对比研究

目的　比较18F FDGSPECT/CT显像与99Tcm MDP骨显像在肺癌骨转移诊断中的临床价值。方法　 19例经病理证实的肺癌患者同期进行18F FDGSPECT/CT显像和常规99Tcm MDP骨显像。结果　 19例患者 8例有骨转移 ,共发现 47个转移灶。18F FDGSPECT/CT发现 8例骨转移 ,99Tcm MDP骨显像发现 7例骨转移 (P >0 .0 5 ) ;18F FDGSPECT/CT发现 45个转移灶 ,99Tcm MDP骨显像发现 2 6个转移灶 (P <0 .0 1)。18F FDGSPECT/CT探测骨转移的灵敏度 95 .74% ,特异度 89.47% ,准确度93 .94% ;99Tcm MDP探测骨转移灵敏度 5 5 .3 2 % (P <0 .0 1) ,特异度为 94.74% (P >0 .0 5 ) ,准确度 66.67% (P <0 .0 1)。结论　在探测肺癌骨转移方面 ,18F FDGSPECT/CT显像较常规99Tcm MDP骨显像具有更高的灵敏度和准确度。对99Tcm MDP骨显像阴性、单一病灶及可疑脊椎转移患者 ,应进一步行18F FDGSPECT/CT显像 ,可起到信息互补、明确诊断的作用。     

脑膜瘤~(99)Tc~m-MIBI与~(99)Tc~m ECD SPECT脑显像的对照研究

目的　探讨脑膜瘤99Tcm MIBI和99Tcm ECDSPECT脑显像的影像特征 ,并评价其应用价值。方法　对 10例正常对照者及 18例脑膜瘤患者进行99Tcm MIBI和99Tcm ECDSPECT脑显像 ;分析病灶的影像特征。结果　正常对照者99Tcm MIBI显像脑实质内均无核素浓聚 ;99Tcm ECD显像脑实质内放射性核素分布大致均匀 ,左右侧基本对称。 18例脑膜瘤99Tcm MIBI显像见肿瘤处均表现为均匀的圆形或卵圆形放射性核素浓聚 ,其阳性率为 10 0 % ;而99Tcm ECD显像 18例中有 17例示肿瘤处表现为形态规整、边缘整齐的圆形或卵圆形内凹缺损 ,其形态与99Tcm MIBI显像所示的浓聚区相吻合 ,另1例为假阴性结果 ,其阳性率为 94.4%。结论　99Tcm MIBI结合99Tcm ECDSPECT脑显像可用于脑膜瘤的辅助诊断