Evaluation of some ratio effects in ~(99m)Tc-MIBI imaging of breast tumors

1 INTRODUCTIONUse of the radionuclide jmaging is attracting attention for detection'in breast can-cer.l1~4] It plays an imPortant role to ear1y diagnose, discover akillary lymPh node metas-tasis and evaluate the multidrug-resistant of the breast cancer. At pIesent, most authorsuse tumor/normal value to express the radionuclide uptake in a t.mo..I5~6l Ih this study,we comPared the tumr/normal ratio with some other ratios.2 MATERIALS AND METHODSOne hUndred patients with a histolog…     

~(99)Tc~m-NMIBI的电荷性质及其与~(99)Tc~m-MIBI的比较

采用区带电泳法和阳离子树脂交换法测定了新型潜在心肌灌注显像剂＾９９Ｔｃ＾ｍＮ－ＭＩＢＩ的电荷性质,且在相同条件下测定了＾９９Ｔｃ＾ｍ－ＭＩＢＩ的电荷性质,并将二者的电荷性质进行了比较。电泳实验结果表明,有７５．６３％＾９９Ｔｃ＾ｍ－ＭＩＢＩ移向负极;在阳离子树脂交换实验中,＾９９Ｔｃ＾ｍ－ＭＩＢＩ的ｌｇ Ｄ－ｐＨ直线斜率ｘ＝０．０４,而相应的＾９９Ｔｃ＾ｍ－ＭＩＢＩ的直线斜率ｘ＝０．９９。两种实验     

^99mTc—MIBI制备反应热力学研究

报道了以MIBI冻干药盒制备~(99m)Tc—MIBI的反应热力学研究。结果表明,~(99m)Tc—MIBI的制备反应为吸热反应,反应热ΔH为339.2kJ/mol,升高反应温度时,~(99m)Tc—MIBI的标记率也提高。为使~(99m)Tc—MIBI的标记率大于90％,反应温度必须高于77℃。     

静息门控心肌显像室壁增厚率判断心肌梗死存活心肌的价值

探讨99mTc-甲氧基异丁基异腈(MIBI)门控心肌灌注显像所获得的室壁增厚信息在判断冠心病心肌梗死患者中存活心肌的价值.26例确诊的冠心病心肌梗死的男性患者,均在2周内完成12导联心电图(EKG)、99mTc-MIBI静息门控心肌灌注显像、18F-脱氧葡萄糖(FDG)心肌代谢显像,所有病人均接受冠状动脉造影(CAG).在双核素心肌显像结果提示为缺血存活心肌的心肌节段中,MIBI分布缺损但室壁增厚(WT)正常的心肌节段占双核素显像结果提示为缺血存活心肌节段的68.2%;在双核素心肌显像结果提示为梗死心肌的心肌节段中,MIBI分布缺损且WT异常的心肌节段占双核素显像结果提示为梗死心肌节段的96.8%.静息门控心肌灌注显像所获得的血流灌注和室壁增厚信息与99mTc-MIBI/18F-FDG双核素心肌显像结果具有较高的符合率,故在单纯的心肌血流灌注图像的基础上,结合室壁增厚信息与传统的心肌灌注显像相比有助于检出更多的存活心肌.     

99Tcm-MIBI和99Tcm-tetrofosmin在肿瘤细胞的摄取和在荷瘤小鼠体内的分布

研究了小鼠黑色素瘤细胞B16、骨髓瘤细胞SP2 / 0和小鼠正常成纤维细胞ME对99Tcm MIBI和99Tcm tetrofosmin的摄取情况。结果表明 ,小鼠黑色素瘤细胞B16、骨髓瘤细胞SP2 / 0对99Tcm MIBI的摄取量高于99Tcm tetrofosmin ;小鼠正常成纤维细胞ME对99Tcm MIBI和99Tcm tetrofosmin的摄取量都很低。研究了99Tcm MIBI和99Tcm tetrofosmin在接种这两种肿瘤细胞后的小鼠体内的生物分布     

四(2-甲氧基异丁基异腈)络铜(Ⅰ)氟硼酸盐的合成和~(99)Tc~m-2-甲氧基异丁基异腈制备研究

本文报道了四[2-甲氧基异丁基异腈]络铜(Ⅰ)氟硼酸盐(Cu(MIBl)_4BF_4)的合成和心肌灌注显像剂~(99)Tc~m-2-甲氧基异丁基异腈(~(99)Tc~m-MIBl)的制备研究及初步动物实验结果。Cu(MIBI)_4BF_4是一白色晶体,经IR,NMR,MS和元素分析等测定,结果与结构完全一致。讨论了pH值、Cu(MIBI)_4BF_4用量、FSA用量及~(99)Tc~mO_4~-洗脱液体积、加热时间对~(99)Tc~m-MIBI标记率的影响。以Cu(MIBI)_4BF_4为原料制成的一步法冻干药盒,标记率大于90％,经动物实验和初步临床应用,证明该药盒使用简单方便,稳定性好,是很有前途的心肌灌注显像剂。     

SPECT MIBI imaging for cardiac output and index in end stage renal disease

To compare cardiac output (CO) and cardiac index (CI) and left ventricular ejection fraction (LVEF) in end-stage renal disease (ESRD) with a control group using gated single photon emission computed tomography (SPECT)/computed tomography (CT) imaging. Altered cardiovascular function with increased CO secondary to arterio-venous fistulas (AVF) for dialysis has been reported in patients with ESRD. Thirty-two patients (18 with AVF or graft) referred for pre-renal transplant cardiac assessment using SPECT/CT were studied with 2 comparison groups, 42 normal weight (body mass index<30) and 46 obese (body mass index>30) patients. End-stage renal disease patients had overall reduced mean hemoglobin 11.6 mg/dL and elevated mean parathyroid hormone of 396 pg/mL. Gated SPECT using MIBI was performed after Bruce protocol apart from 4 renal patients who underwent cardiac stressing with adenosine. Cardiac output was calculated by product of stroke volume and resting heart rate and CI determined. Mean CI was 2.6 L/min/m(2) for renal disease group compared with 2.2 and 2.3 L/min/m(2) for the normal weight and obese groups, P=0.005 and 0.005 respectively (Wilcoxon's rank test). Cardiac output was increased for the renal group; 4.9 L/min, equal to the obese group but greater than normal weight group at 4.3 L/min. No significant difference in LVEF was seen between the 3 patient groups. No significant difference in CI or output was seen between the renal disease patients with AVF and those without fistulas. Cardiac ouput and CI, assessed using SPECT/CT, are increased in patients with ESRD. This may be independent of the presence of AVF or grafts and other factors such as anemia and hyperparathyroidism may contribute to this high output cardiac function. As LVEF is not increased for these patients, increased heart rate, may also contribute to elevated CO.