^99mTc—MIBI心肌灌注显像潘生丁试验一天法在冠心病诊断中的应用

介绍了对１６１例冠心病患者采用＾９９ｍＴｃ－ＭＩＢＩ心肌显像潘生丁试验一天法方案进行检测的结果，其中２０例与冠状动脉造影进行了对比观察。患者先作＾９９ｍＴｃ－ＭＩＢＩ静态平面与断层心肌显像，接着进行潘生丁试验，再于静脉注射＾９９ｍＴｃ－ＭＩＢＩ后１ｈ作平面与断层心肌显像。采用本方法诊断冠心病的灵敏度为９１％。其检测ＬＡＤ的灵敏度为８８％；诊断ＲＣＡ及Ｌｃｘ的灵敏度分别为８１％与７７％、特异性分别为     

^99mTc标记抗心肌肌凝蛋白单克隆抗体在实验性心肌梗塞中的研究

为比较＾９９ｍＴｃ－ＡＭＬＡ的特异性，将两组心肌梗塞２４ｈ大鼠分别注射＾９９ｍＴｃ－ＡＭＬＡ（ｎ＝２４）和＾９９ｍＴｃ－Ｎ－ＩｇＧ（ｎ＝１８），为研究不同心肌梗塞时间对摄取抗体的影响，将另一组不同心肌梗塞时间（２ｈ到１４ｄ共８个亚组）的大鼠注射＾９９ｍＴｃ－ＡＭＬＡ，计算三组的ＩＤ％／ｇ和梗塞心肌摄取／正常心肌摄取比（ＩＭ／ＮＭ）用一只心肌梗塞的狗注射＾９９ｍＴｃ－ＡＭＬＡ后离体心肌显像，结果表明     

^99mTc（V）—DMSA及^99mTc—MIBI肺显像诊断原发性肺癌的应用研究

对３０例原发性肺癌患者分别应用＾９９ｍＴｃ（ｖ）－ＤＭＳＡ及＾９９ｍＴｃ－ＭＩＢＩ显像。结果表明：＾９９ｍＴｃ９Ｖ）－ＤＭＳＡ，＾９９ｍＴｃ－ＭＩＢＩ敏感度分别为９０％，７６．７％。两者结合显像阳性率为９６．７％。鳞状上皮细胞癌对＾９９ｍＴｃ（Ｖ）－ＤＭＳＡ及＾９９ｍＴｃ（Ｖ）－ＤＭＳＡ，＾９９ｍＴｃ－ＭＩＢＩ摄取程度比其它类型的肺癌高。     

^99mTc—MIBI评价缺血／再灌注心肌活力的实验研究

应用＾９９ｍＴＣ－ＭＩＢＩ对家兔缺血／再灌注心肌细胞及线粒体代谢和活力进行了评价，将家兔ＬＡＤ阻断２０ｍｉｎ，３ｈ再灌主，于灌注后２－５ｍｉｎ静脉注射＾９９ｍＴｃ－ＭＩＢＩ，结果缺血３ｈ组缺血心肌再灌注早期（１０ｍｉｎ）晚期（３ｈ）相对放射性活度，心肌ＡＴＰ含量均明显低于缺前２０ｍｉｎ组，非缺血心肌和缺血２０ｍｉｎ心肌＾９９ｍＴｃ－ＭＩＢＩ亚细胞分布与ＳＤＨ活性呈显著正相关（ｒ＝０．８８，Ｐ〈０．     

~(99m)Tc(Ⅴ)-DMSA 及 ~(99m)Tc-MIBI 肺显像诊断原发性肺癌的应用研究

对３０例原发性肺癌患者分别应用９９ｍＴｃ（Ⅴ）－ＤＭＳＡ及９９ｍＴｃ－ＭＩＢＩ显像。结果表明：９９ｍＴｃ（Ⅴ）－ＤＭＳＡ、９９ｍＴｃ－ＭＩＢＩ敏感度分别为９０％、７６．７％。两者结合显像阳性率为９６．７％。鳞状上皮细胞癌对９９ｍＴｃ（Ⅴ）－ＤＭＳＡ及９９ｍＴｃ－ＭＩＢＩ摄取程度比其它类型的肺癌高。     

系统性硬皮病心肌损害在冷诱导心肌断层显像和超声心动图的表现

应用＾９９ｍＴｃ－ＭＩＢＩ对２３例系统性硬皮病（ＳＳＣ）病人进行了心肌断层显像冷诱导试验,并同期应用于维超声心动图检测左心室功能和室壁运动。结果表明,１４例病人（６０．９％）有心肌放射性分布异常,其中３例可逆性缺陷６个节段,５例固定性缺损９个节段,６例两种缺损共存１４个节段;心脂显像异常率在雷诺现象（ＲＰ）组和无ＲＰ组之间显著性差异（０．５〉Ｐ〉０．２５）;心肌显像异常组病人的左室射血分数、每搏输     

^99mTc—MIBI显像鉴别甲状腺“冷”结节的性质

用＾９９ｍＴｃ－ＭＩＢＩ显像法对５６例经病理证实的甲状腺“冷”结节患者鉴别，结果血流丰富的共２２例，＾９９ｍＴｃ－ＭＩＢＩ显像Ｔ／ＮＴ比值，恶性病变中乳头状癌、滤泡状癌，髓样癌，未分化癌均与＾９９ｍＴｃＯ＾－５显像有非常显著性差异，而良性病变中仅腺瘤有显著性差异，其余均无显著性差异。     

^99mTc标记环己二酮二肟及其甲基硼酸加成物和初步动物实验

实验结果表明，＾９９ｍＴｃ－ＣＤＯ的标记率受体系的ｐＨ值影响较小，而＾９９ｍＴｃ－ＣＤＯ－ＭｅＢ只有在ｐＨ＝３．５－４．０时标记率才能大于９０％。小鼠体内分布实验表明，＾９９ｍＴｃ－ＣＤＯ－ＭｅＢ在动物心肌中较高的吸收，但随时间延长而迅速清除。心／肝比值在给药后１、５和１０ｍｉｎ时分别为３、１．５和０．８。＾９９ｍＴｃ－ＣＤＯ在心、脑中的浓聚明显低于９９ｍＴｃ－ＣＤＯ－ＭｅＢ。     

^99mTc—MIBI SPECT与^18F—FDG PET诊断胶质瘤复发及恶变对比分析

对２８例经过治疗的胶质瘤患者进行Ｇｄ－ＤＴＰＡＭＲＩ和＾１８Ｆ－ＦＤＧＰＥＴ显像，其中１４例同时进行＾９９ｍＴｃ－ＭＩＢＩＳＰＥＣＴ显像，并与治疗前解剖影像对比，ＰＥＴ结果发现１４例高代谢，１０例低代谢，４例瘤灶中心坏死，周边ＦＤＧ环状摄取，８例首次手术病理Ｉ－Ⅱ级星形细胞瘤患者中５例为高代谢，＾１８Ｆ－ＦＤＧＰＥＴ和＾９９ｍＴＣ－ＭＩＢＩＳＰＥＣＴ诊断胶质瘤复发及恶变的灵敏度依次为９３．３％，９     

肾显像剂^99Tc—Diol的制备及其基础实验

报道了肾显像剂＾９９ｍＴｃ－１，２－二羟基丙基磷酸的制备方法及其动物实验研究。结果显示，＾９９Ｔｃ－Ｄｉｏｌ注入小鼠体内５ｍｉｎ后在肾脏达最大摄取度；注入家兔５ｍｉｎ后双肾动态显像最清晰。表明＾９９ｍＴｃ－Ｄｉｏｌ是一种肾脏摄取率高，摄取速度快的新型肾显像剂。     

A comparative study of primary coronary stenting and intravenous thrombolysis for acute myocardial infarction using~(99m) Tc-MIBI SPECT imaging

1 INTRODUCTIONRe-perfusion therapy is one of the important progresses of acute myocardial infarction (AMI) therapy. It is established that early intravenous thrombolysis is effective and convenient for patency-related artery (IRA)[']. But obvious limitation existsfor thrombolysis application such as low IRA patency rate, recuxrent ischeAnc events,high re-infarction rate, hemorrhage complication and so many contraindications. Recentyearst primary coronary steming has been developed as …     

Proportion of viable myocardium is more reliable than semi-quantitative score in predicting functional recovery： a pilot study of PET myocardial viability imaging

PET myocardial viability imaging is the"gold standard"for the non-invasive assessment of myocardial viability.The research aims to find out the best methods of imaging interpretation in predicting the postoperative functional recovery.Twenty-one CAD patients with multi-vessel involvement Were recruited.All pailents underwent gated myocardial perfusion imaging(G-MPI) and FDG PET myocardial imaging within 2 weeks before coronary artery bypass grafting.The postoperative G-MPI was performed in all patients 3 months after the surgery.Out of the total 420 segments,164 segments of ischemic myocardium were detected by preoperative G-MPI.Among them,93ischemic segments were identified as non-viable(difference score≥0)and the rest 71 segments Were identified as viable(difference score＜0).The proportion of viable segments(the ratio of viabl esegments versus iscbemic segments)and summed difference score of metabolism to perfusion were calculated.The patients were further divided into 2 groups according to the proportion of viable myocardium:group Ⅰ(the proportion≥50%,12 cases)and group Ⅱ(the proportion＜50%,9 cases)while another division was made according to SDS:group A(SDSE≥0),group B(-5≤SDS＜0)and group C(SDS＜-5).The diagnostic accuracy of proportion of viable segments and SDS in predicting the post-revascularization improvement in the left ventricular ejection fraction by at least 5 or more ejection fraction units was 88.89%(8/9)and 55.56%(5/9)respectively.It is concluded that both approaches allow accurate evaluation of myocardial viability.Furthermore,the proportion of viable myocardium is more reliable in predicting the postoperative functional recovery.     

99mTc-MIBI显像对甲状腺癌及术后随访的临床价值

４６例甲状腺原发肿块（恶性病变１８例,良性病变２８例）及２４例甲状腺癌术后复发或转移患者,应用＾９９ｍＴｃ－ＭＩＢＩ显像。结果１８例甲状腺癌中１４例原发灶有效射性填充。而２８例良性病变中仅９例原发灶有放射性填充。２４例甲状腺癌术后复发或转移患者有１９例呈阳性显示,其阳性率明显高于＾１３１Ｉ显像。＾９９ｍＴｃ－ＭＩＢＩ显像对甲状腺癌尤其是术后复发、转移的早期诊断具有较高的临床价值。     

99mTc标记新型硼酸结构快速心肌灌注显像药物的制备及初步显像评价

^99mTc-TEBO为临床批准的快速心肌灌注显像药物,该药物初始摄取高,但心肌滞留不稳定,为此,本研究通过优化其硼酸结构,分别制备标记物^99mTc-2SP、^99mTc-4LPA及^99mTc-2MDM,制备时间均为30 min,均为无色澄明液体,放化纯度均>95%,分别在健康小型猪体内进行SPECT动态显像,并与99mTc TEBO进行对比。结果表明：^99mTc-TEBO注射后0~5 min,左室心肌快速摄取,但随后心肌放射性迅速洗脱,在10 min时心肌约洗脱至峰值的75%,与心血池放射性浓度比值为1.63。^99mTc-2SP引入2-甲磺酰基吡啶-5-硼酸基后心肌初始摄取高,心肌滞留时间明显延长,心肌洗脱较缓慢,左室心肌均清晰显影,在第10 min时心肌摄取仍可保持峰值的95%,与心血池放射性浓度比值为3.75,明显高于^99mTc-TEBO。而另外两种显像剂^99mTc-4LPA和^99mTc-2MDM在注射后15 min内显像不理想。因此,^99mTc-2SP是有潜力的心肌灌注显像药物。     

Feasibility of Tc-TRODAT-1 Micro-SPECT imaging of dopamine transporter in animal retinas

In this paper, 99mTc-TRODAT-1 Micro-SPECT (single-photon emission computed tomography) was used for imaging dopamine transporter (DAT) in retinas and to investigate the changes of DAT in retinas of guinea pigs with form deprivation myopia. Pigmented guinea pigs aged 3 weeks were devided into form deprivation myopia (FDM) group (n=6) and normal control group (n=6). The test group wore translucent goggles randomly for 4 weeks,and both groups underwent biometric measurement (refraction and axial length) before and after the experiment.Micro-SPECT retinas imaging was performed at the 4th week after injection of 99nTc-TRODAT-1. The retinas were clearly resolved in the images. The ratio of 99mTc-TRODAT-1 uptake in the myopic retinas (11.55±2.80) was 3.64±1.40 lower than that in the control eye (15.20±1.98), and 2.35 1.05 lower than that in the fellow eyes (13.90±2.04). The results showed that 99mTc-TRODAT-1 Micro-SPECT eye imaging can be used to trace the distribution and changes of DAT in retina, and DAT in the myopic retinas were lower than that in the normal control eyes and fellow eyes. Micro-SPECT may provide a new approach for further studies on the role of dopamine system in the experimental myopia.     

18F-FDG符合显像诊断梗死心肌活力的实验研究

将6只20kg的小型猪制作心肌梗死模型,进行心肌99Tcm-甲氧基异丁基异腈(99Tcm-sestamibi,99Tcm-MIBI)血流灌注显像确定梗死区,用18F-脱氧葡萄糖(18F-fluorodeoxyglucose,18F-FDG)观察空腹与糖负荷图像的差别,确定心肌坏死或存活区.制作模型前进行自身对照形成对照组.并进行B超心功能检查.结果显示:心肌梗死区大部分心肌没有活力,99Tcm-MIBI和18F-FDG都没有摄取.空腹时有部分心肌显影,糖负荷时该区域显影程度减轻.