99TcmO-4显像评价唾液腺自体移植治疗

目的　探讨99TcmO-4 唾液腺显像在角结膜干燥症颌下腺自体移植术前患者选择和术后判断移植腺体的活力、分泌功能及导管通畅中的价值。方法　 12例重症干燥角结膜炎患者 ,均行99TcmO-4唾液腺显像 ,其中 9例行单侧自体腺体移植手术 ,术后再行99TcmO-4 唾液腺显像 ,其中 5例于术后 1周、1、3和 6个月进行动态及静态显像 ,观察移植腺体的形态、摄取显像剂情况及排泄管通畅与否。结果　术前 3例患者颌下腺显像不良 ,未行手术。 9例自体颌下腺移植术患者中 6例移植腺体摄取显像剂正常。但在早期 (1～ 4周 )除个别患者外 ,眼内均未见明显放射性分布 ;3个月后 ,6例患者眼内均有放射性分布 ,移植腺体功能均正常。 3例患者术后无泪液排出 ,其中 2例99TcmO-4 唾液腺显像阴性 ,手术证实为腺体坏死 ,1例经超声检查证实腺体无血运。另 1例移植腺体显像正常 ,但排泄导管不通 ,经冲洗导管后 ,眼内显影亦正常。结论　99TcmO-4 唾液腺显像可评估颌下腺功能 ,判断移植手术是否成功及有无并发症     

99TcmO4-动态显像在颌下腺移位术中的临床应用

目的探讨颌下腺动态显像在鼻咽癌颌下腺移位术中的临床价值。方法70例鼻咽癌初诊患者，分为试验组36例，非试验组（对照组）34例。对照组直接行常规放疗；试验组于术前1天行颌下腺^99Tc^mO4^-动态显像，根据结果选取功能较好一侧颌下腺于第2天行颌下腺移位术，术后复查颌下腺功能及择期行常规放疗。放疗后皆行颌下腺^99Tc^mO4^-动态显像及记录患者口腔干燥症状的程度，结果采用非参数秩和检验进行统计分析。结果移位侧颌下腺功能于术后、放疗后损伤明显减轻，与非移位侧颌下腺差异有显著性（P〈0．01）；试验组中度以上口腔干燥症率为13．9％，对照组为76．5％，差异有显著性（P〈0．01）。结论^99Tc^mO4^-颌下腺动态显像可准确、灵敏地评估颌下腺功能。     

唾液腺核素显像在诊断干燥综合症中的临床意义

目的探讨唾液腺核素^99mTcO4-显像的形态、功能等影像学特点，评判唾液腺显像对干燥综合症的诊断价值。方法对33例自身免疫普阳性的患者及10例健康体检者，行唾液腺核素^99mTcO4-显像，利用计算机感兴趣区（ROI）技术和自编软件获得腮腺时间-放射性曲线并分析计算摄取指数、相对摄取率、排泄率（MSR）及酸刺激后唾液腺放射性计数由高峰降至最低的时间，比较两组各功能指标所得数据行统计学处理。结果43例受检者顺利完成检查，一次显像可同时获得双侧唾液腺动态影像过程、时间一放射性曲线以及各功能参数半定量指标，正常组唾液腺各项功能指标明显高于干燥综合征组（P值〈0．01）。结论核素特征性显像是诊断干燥综合征的灵敏指标，动态显像定量分析省时、可行，该方法值得进一步推广。     

99 TcmO-4甲状腺显像定量分析的临床应用

目的：探讨^99Tc^mO4^-甲状腺显像定量分析在甲状腺疾病诊疗中的价值。方法：采用Siemens Orbit SPECT仪对正常对照者和Graves病、桥本甲状腺炎（HD）及亚急性甲状腺炎（SAT）患者行^99Tc^mO4^-甲状腺动、静态双时相显像，测定颈动脉与甲状腺显像的时间差（Td)，甲状腺5min与1min时像素的平均放射性比值（AR），20min时甲状腺与股中段像素的平均放射性比值（UI）。结果（1）Graves病定量分析参数与体外甲状腺功能（简称甲功）指标基本一致，治疗后UI值的恢复速度慢于Td和AR，亦滞后于体外甲功指标的恢复。停药后复发者的UI值高于未复发者和对照组。（2）HD甲功增高组的表现与Graves病相似，甲功正常和亚临床甲低组的Td、AR和UI值与对照组相比差异均无显著性，甲低组的摄^99Tc^m能力降低。（3）SAT甲功升高者摄^99Tc^m能力降低，多呈弥漫性放射性分布稀疏，甲功正常组主要表现为局限性放射性分布稀疏。结论：^99Tc^mO4^-甲状腺显像定量分析能反映甲状腺形态改变与功能变化的内在关系，在常见甲状腺疾患诊疗中有重要价值。     

^99Tc^m-二亚乙基三胺五乙酸与^99Tc^m-奥曲肽眼眶显像在甲状腺相关性眼病中的对比研究

目的通过对比^99Tc^m-二亚乙基三胺五乙酸（^99Tc^m-DTPA）与^99Tc^m-奥曲肽（^99Tc^m-OCT）眼眶显像,比较两种显像方法在评估甲状腺相关眼病（TAO）患者眼部炎性反应活动度中的临床价值。方法26例TAO患者依据临床活动度评分（CAS）标准分为炎性反应活动组16例、非炎性活动组10例,另有14名正常志愿者作为对照组。静脉注射^99Tc^m-DTPA 740 MBq,0．5h后行眼眶平面及体层显像,隔日同一患者静脉注射^99Tc^m-OCT740MBq,1-2h后行眼眶平面及体层显像。获取各组两种眼眶显像剂的摄取率。对两种显像方法获得的半定量指标UROCT和URDTPA进行配对t检验并分别与CAS评分进行Spearman相关性分析。结果两种显像剂的眼眶摄取率未见明显差异（t=0．075,P〉0．05）。两种显像剂的眼眶摄取率（UROCT、URDTPA）与患者CAS评分之间具有很好的相关性（^99Tc^m-DTPA：r=0．835,P〈0．001;^99Tc^m-OCT：r=0．912,P〈0．001）。结论^99Tc^m-DTPA与^99Tc^m-OCT的眼眶显像有较好的一致性,证明^99Tc^m-DTPA眼眶显像是一种可行的、并可能成为一种很有发展前景的评价TAO炎性反应活动度的新方法。     

系统性红斑狼疮继发干燥综合征的唾液腺功能定量分析

目的 探讨系统性红斑狼疮继发干燥综合征(SLE-SSS)患者的99TcmO4-唾液腺动态显像特点.方法 对42例SLE-SSS患者与10名健康对照者行常规99TcmO4-唾液腺动态显像,获得并比较腮腺与颌下腺的时间-放射性曲线(TAC)及功能参数:15 min摄锝率(UR)与酸反应泌锝率(SR).结果 在SLE-SSS组,21.4%的腮腺与59.5%(11.9%为单侧)的颌下腺TAC明显异常.SLE-SSS组的UR与SR均值均低于对照组(P＜0.01),且左侧腮腺UR均值低于右侧(P＜0.01).SLE-SSS组腮腺的UR及SR分别与颌下腺的UR及SR呈明显正相关(P＜0.05),腮腺及右侧颌下腺的UR与SR无明显相关性(P＞0.05),左侧颌下腺的UR与SR呈明显正相关(P＜0.01和＜0.05).结论 SLE-SSS时腮腺与颌下腺的摄取及分泌功能受损程度呈正相关,且颌下腺受损程度重于腮腺;腺体自身摄取与分泌功能受损程度无必然关联,且双侧腺体的功能受损程度不对称.     

类风湿关节炎继发干燥综合征的唾液腺功能定量分析

本研究探讨类风湿关节炎继发干燥综合征（ Sjogren＇s syndrome secondary to rheumatoid arthritis, RA-SSS）患者的^99Tc^mO4-唾液腺动态显像及功能参数特点。     

甲状旁腺腺瘤伴甲状腺腺瘤99Tcm-MIBI显像一例

^99Tc^m-甲氧基异丁基异腈（MIBI）甲状旁腺平面显像诊断甲状旁腺腺瘤有2种阳性显像图，即甲状腺下缘型——单侧甲状腺下极外见浓聚灶和甲状腺腺体型——一侧甲状腺腺内见放射性浓聚灶，前者多见，后者少见。^99Tc^m-MIBI是一种亲肿瘤显像剂，可被甲状旁腺腺瘤和甲状腺腺瘤摄取。因此，鉴别甲状腺腺体型的甲状旁腺腺瘤与甲状腺腺瘤是避免误诊的关键。笔者报道一例罕见甲状旁腺腺瘤伴甲状腺腺瘤的^99Tc^m-MIBI显像结果，供读者参考。     

改良半定量唾液腺动态显像分析腮腺功能方法初探

目的:建立改良99mTcO4-唾液腺动态显像方法和腮腺半定量功能指标.材料和方法:对30例正常人和44例干燥综合征患者分别进行30min99mTcO4-动态显像,于第15min时舌下含服维生素C(Vit.C)o.1g,利用计算机感兴趣区(ROI)技术和自编软件获得腮腺时间-放射性曲线和各功能参数,比较两组各功能指标.结果:74例受检者顺利完成检查.患者和正常对照组双侧腮腺第15min摄取指数、相对摄取指数及排泄分数差异明显(P<0.05).结论:改良99mTcO4-唾液腺动态显像省时,其功能指标可直观、客观反映腮腺功能,值得进一步推广.     

^99Tc^m—MIBI静息门控心肌灌注显像在心肌梗死干细胞移植治疗中的价值

目的用^99Tc^m-甲氧基异丁基异腈（MIBI）静息门控心肌灌注显像的方法,评价急性心肌梗死（AMI）患者自体骨髓间质干细胞（MSC）移植术治疗的疗效。方法AMI患者31例,均行经皮冠状动脉介入治疗（PCI）术,其中18例患者作为试验组,于PCI术后行自体MSC移植术治疗,PCI术后拒绝行细胞移植治疗的13例患者作为对照组。于PCI术前,术后1,3和6个月进行^99Tc^m-MIBI静息门控心肌灌注断层显像,评价心肌血流灌注及心功能改善程度。统计学处理采用SPSS11．0软件,行t检验。结果所有患者术后1个月放射性稀疏节段数明显减少,术后3个月和6个月放射性缺损节段数试验组（2．37±1．09和2．21±0．93）较对照组（3．24±0．93和3．21±1．05）明显减少（t=2．32,2．79,P均〈0．05）;与术前[（35．4±16．7）％和（32．8±15．9）％]相比,术后6个月试验组[（57．2±14．3）％]和对照组[（44．8±11．7）％]患者左心室射血分数（LVEF）均显著升高（t=4．27,2．18,P均〈0．05）,试验组患者LVEF明显高于对照组（t=2．58,P〈0．05）。结论心肌梗死患者自体MSC移植术后,应用^99Tc^m-MIBI静息门控心肌灌注显像随访和评价疗效有一定临床价值。     

2021 AHA/ACC/ASE/CHEST/SAEM/SCCT/SCMR Guideline for the Evaluation and Diagnosis of Chest Pain: A Report of the American College of Cardiology/American Heart Association Joint Committee on Clinical Practice Guidelines

AimThis clinical practice guideline for the evaluation and diagnosis of chest pain provides recommendations and algorithms for clinicians to assess and diagnose chest pain in adult patients.MethodsA comprehensive literature search was conducted from November 11, 2017, to May 1, 2020, encompassing randomized and nonrandomized trials, observational studies, registries, reviews, and other evidence conducted on human subjects that were published in English from PubMed, EMBASE, the Cochrane Collaboration, Agency for Healthcare Research and Quality reports, and other relevant databases. Additional relevant studies, published through April 2021, were also considered.StructureChest pain is a frequent cause for emergency department visits in the United States. The “2021 AHA/ACC/ASE/CHEST/SAEM/SCCT/SCMR Guideline for the Evaluation and Diagnosis of Chest Pain” provides recommendations based on contemporary evidence on the assessment and evaluation of chest pain. This guideline presents an evidence-based approach to risk stratification and the diagnostic workup for the evaluation of chest pain. Cost-value considerations in diagnostic testing have been incorporated, and shared decision-making with patients is recommended.     

PET/MRI of the breast

The future clinical use of the combination of positron emission tomography (PET) with 2-Fluoro[F-18]-2-Deoxy-d-Glucose (FDG)and MRI is still unclear. If a patient requires a PET and breast DCE-MRI for staging purposes, both scans can be done in the same visit. In the breast, DCE-MRI is better at lesion detection (sensitivity), margin evaluation, and has a higher specificity than CT. The potential for multiparametric qualitative and quantitative imaging is also an advantage of PET/MRI which provides opportunity to improve tumor characterization and may ultimately lead to outcome prediction. This review discusses technical and clinical aspects of this emerging technology in breast cancer patients.     

Implication of PBP74/mortalin/GRP75 in the radio-adaptive response

PURPOSE: To investigate the relationship between expression of the human peptide-binding protein PBP74 and the occurrence of an adaptive response to ionizing radiation. MATERIALS AND METHODS: Human tumour cell lines HT29 and MCF-7 were transfected with a PBP74 or PBP74 antisense construct. For demonstration of an adaptive response, cells lines were irradiated with a conditioning dose of 0.25 Gy cobalt-60 gamma-rays followed by a second dose of 4.0 Gy after an interval of 4.5 h. Response was measured in terms of clonogenic survival. RESULTS: Transfection of a PBP74 plasmid caused transient overexpression of PBP74 mRNA in both cell lines. The optimal dose for the induction of PBP74 in the cell lines investigated was 0.1-0.25Gy and PBP74 induction occurred within 30 min of irradiation. For both cell lines, the adaptive response was repressed when cells were transfected with the anti-PBP plasmid. However, the converse, an enhancement of the adaptive response in cell lines transfected with the PBP74 construct, was seen only for HT29 cells under certain experimental conditions. CONCLUSIONS: The results support the view that while PBP74 is necessary to the adaptive response, it may not by itself be sufficient for the adaptive response to occur.     

Dynamics of 95Zr in the rice/water/soil system.

In order to get a better understanding of the environmental behavior of 95Zr and to generate fundamental data for evaluation of its ecological risk, an experiment was conducted to study 95Zr dynamics in a simulated rice/water/soil system. The results showed that the concentration of 95Zr in surface water decreased rapidly with time due to precipitation, adsorption to soil and uptake by rice, and most of 95Zr in soil was found concentrated in the surface layer (0-8 cm from surface). The 95Zr could not readily move downwards with percolating water and remained in surface soil. The 95Zr taken up from surface water and surface soil mainly concentrated in roots and lower parts of stem. The concentration of 95Zr in upper part of stem and leaves were relatively lower, which were only slightly greater than the detection limit. The 95Zr concentration in tassel was near the detection limit. The dynamics of 95Zr concentrations in rice, water and soil can be described with exponential function.     

99Tcm-MDP SPECT/CT融合显像在钙化防御诊断中的增益价值

目的探讨99Tcm-MDP SPECT/CT融合显像较常规平面骨显像在钙化防御诊断中的增益价值.资料与方法回顾性分析2019年3月—2020年9月东南大学附属中大医院核医学科42例临床疑诊钙化防御患者,均行全身骨显像和SPECT/CT融合显像,并经皮肤活检确诊.观察全身骨显像和SPECT/CT融合显像(均42例)诊断的...