SPECT, single-photon emission computed tomography

SPECT,单光子发射计算机断层扫描
  • 文章类型: Journal Article
    关于接受癫痫手术的儿童的纵向癫痫发作结果的数据很少。所有1998年1月至2015年12月接受切除性癫痫手术的儿童(n=132)均被确认。相关临床,神经生理学,成像,提取手术和癫痫发作结果数据.多变量logistic回归分析和Kaplan-Meier生存与Cox比例风险模型。手术时的平均年龄为7.8岁(范围为0.2-17.9)。平均随访5.3±2.7年,71%无癫痫发作。在那些没有癫痫发作的人中,65名患者成功地完全戒除了抗癫痫药物。使用生存分析,手术后1年出现EngelI类结局的概率为81%(95%置信区间[CI]87%-75%).这一数字在两年内降至73%(95%可信区间81%-65%),五年时为58%(95%CI67.8%-48%),和47%的十年。比例危险模型显示,中度至重度发育障碍(HR6.5;p=0.02)和缺乏完全切除(HR0.4;p=0.02)的存在作为无癫痫发作结局的负预测因子。我们的研究表明,小儿癫痫手术后的长期癫痫发作控制良好,并强调了癫痫发作结局的重要预测因素,指导病例选择和手术前的期望咨询。
    There is a paucity of data on longitudinal seizure outcome of children undergoing epilepsy surgery. All children (n = 132) who underwent resective epilepsy surgery from January 1998 to December 2015 were identified. Relevant clinical, neurophysiological, imaging, surgical and seizure outcome data were extracted. Multivariable logistic regression analysis and Kaplan-Meier survival with Cox proportional hazard modelling were performed. The mean age at surgery was 7.8 years (range 0.2-17.9). 71% were seizure-free at a mean follow up of 5.3 ± 2.7 years. Of those who were seizure-free, 65 patients were able to completely wean off anti- seizure medications successfully. Using survival analysis, the probability of Engel Class I outcome at one year after surgery was 81% (95% confidence interval [CI] 87%-75%). This dropped to 73% at two years (95% CI 81%-65%), 58% at five years (95% CI 67.8%-48%), and 47% at ten years. Proportional hazard modelling showed that the presence of moderate to severe developmental disability (HR 6.5; p = 0.02) and lack of complete resection (HR 0.4; p = 0.02) maintain association as negative predictors of seizure-free outcome. Our study demonstrates favorable long-term seizure control following pediatric epilepsy surgery and highlights important predictors of seizure outcome guiding case selection and counseling of expectations prior to surgery.
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  • 文章类型: Journal Article
    传染性SARS-CoV-2型脑膜炎很罕见,特别是作为SARS-CoV-2感染的首次表现。传染性SARS-CoV-2脑膜炎最初可以表现为癫痫发作和神经精神异常,恶化到昏迷的地步,偶尔会导致死亡。传染性SARS-CoV-2脑膜炎患者需要全面评估和强制治疗,以改善通常较差的预后。
    Infectious SARS-CoV-2 meningitis is rare, especially as the first manifestation of a SARS-CoV-2 infection. Infectious SARS-CoV-2 meningitis can initially manifest with seizures and neuropsychiatric abnormalities, worsen to the point of coma, and occasionally lead to death. Patients with infectious SARS-CoV-2 meningitis require comprehensive evaluation and forced treatment in order to improve the often poor outcome.
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  • 文章类型: Journal Article
    尽管门到气球的时间大大减少了,ST段抬高型心肌梗死(MI)患者的死亡率和心力衰竭发生率已趋于稳定.在再灌注时代进一步减小MI尺寸仍然存在未满足的需求。大多数增强心肌抢救的辅助疗法都失败了,但有些人表现出了希望。目前,一项关键试验显示梗死面积减少的唯一辅助治疗是局部给予过饱和氧(SSO2)治疗.这篇综述提供了先前减少梗死面积的工作背景。作者描述了显示SSO2在减少MI大小方面的有效性的临床前数据,改善局部心肌血流量和心功能,和减少不良左心室重塑-可能是通过减少再灌注危险区内残余缺血的斑片状区域。描述了SSO2有益的潜在机制,包括通过血浆向缺血区输送高水平的溶解氧,但可行,血管和心肌细胞,从而允许他们的生存和功能。然后作者描述了SSO2临床试验,证明在前ST段抬高MI患者中,SSO2治疗安全有效地减少梗死面积,改善心脏功能,减少左心室重塑。
    Despite the fact that door-to-balloon times have been greatly reduced, the rates of death and the incidence of heart failure in patients with ST-segment elevation myocardial infarction (MI) have plateaued. There is still an unmet need to further reduce MI size in the reperfusion era. Most adjunctive therapies to enhance myocardial salvage have failed, but some have shown promise. Currently, the only adjunctive therapy in a pivotal trial that has demonstrated reductions in infarct size is localized delivery of supersaturated oxygen (SSO2) therapy. This review provides background on prior infarct size reduction efforts. The authors describe the preclinical data that shows the effectiveness of SSO2 in reducing MI size, improving regional myocardial blood flow and cardiac function, and reducing adverse left ventricular remodeling-presumably by reducing patchy areas of residual ischemia within the reperfused risk zone. Potential mechanisms by which SSO2 is beneficial are described, including the delivery of high levels of dissolved oxygen through plasma to ischemic, but viable, vascular and myocardial cells, thus allowing their survival and function. The authors then describe the SSO2 clinical trials, demonstrating that in patients with anterior ST-segment elevation MI, SSO2 therapy safely and effectively reduces infarct size, improves cardiac function, and reduces adverse left ventricular remodeling.
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  • 文章类型: Journal Article
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  • 文章类型: Journal Article
    暂无摘要。
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  • 文章类型: Journal Article
    使用单光子发射计算机断层扫描-计算机断层扫描碲锌镉相机使用标准化摄取值评估绝对心肌羟基二亚甲基二膦酸盐-tech-99m摄取(DiscoveryNM/CT670CZT,GEHealthcare,芝加哥,伊利诺伊州)在接受tafamidis治疗的心脏甲状腺素相关淀粉样变性患者中,羟二亚甲基二膦酸盐的心脏摄取降低。这种成像技术应有助于监测治疗和评估预后。(难度等级:中级。).
    Assessment of absolute myocardial hydroxydimethylene diphosphonate-technetium-99m uptake using standardized uptake value with a single-photon emission computed tomography-computed tomography cadmium zinc telluride camera (Discovery NM/CT 670CZT, GE Healthcare, Chicago, Illinois) in a patient with cardiac transthyretin-related amyloidosis treated with tafamidis showed a decrease in hydroxydimethylene diphosphonate cardiac uptake. This imaging technique should be helpful in monitoring therapy and evaluating prognosis. (Level of Difficulty: Intermediate.).
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  • 文章类型: Journal Article
    为了确定冠状动脉疾病(CAD)危险因素特征的时间变化,临床参数,以及22年以上接受放射性核素压力测试的患者的相应死亡率。
    我们评估了在1991年1月2日至2012年12月31日期间接受放射性核素压力测试的39,750名疑似CAD患者(“诊断”患者)和10,982名已知CAD患者,并随访至少5年(中位数,12.7年)。
    在诊断患者和已知CAD患者中,典型的心绞痛和心肌缺血有明显的时间下降。然而,疾病的几个危险因素逐渐增加,包括糖尿病,肥胖,和高血压。此外,在第一和第四阶段,两个诊断型患者(从26.5%[6176中的1634]增加到53.0%[10,908中的5781];P<.001)和已知CAD患者(从31.1%[3213中的999]增加到75.5%[1860中的1405];P<.001)中,进行药理学测试代替运动的需求明显增加.在我们的研究中,这些竞争的积极和消极风险因素趋势的净效应是在时间跨度内调整后的年死亡率没有变化。在诊断性患者中,从1991-1995年的每年1.57%到2006-2012年的每年1.76%,在已知CAD的患者中,在相同的时间间隔内从每年2.46%到每年2.75%。
    我们的研究结果表明,在进行心脏压力测试的患者中,全因死亡率的驱动因素在当代发生了明显的转变,而不是典型的心绞痛和可诱导的心肌缺血等因素。患病率正在下降,以及糖尿病和无法进行锻炼等因素,患病率正在增加。
    UNASSIGNED: To identify temporal shifts in coronary artery disease (CAD) risk factor profiles, clinical parameters, and corresponding mortality rates among patients referred for radionuclide stress testing over 22 years.
    UNASSIGNED: We assessed 39,750 patients with suspected CAD (\"diagnostic\" patients) and 10,982 patients with known CAD who underwent radionuclide stress testing between January 2, 1991, and December 31, 2012, and were followed up for at least 5 years (median, 12.7 years).
    UNASSIGNED: Among both diagnostic patients and those with known CAD, there was a marked temporal decline in typical angina and myocardial ischemia. However, several risk factors for disease progressively increased, including diabetes, obesity, and hypertension. In addition, the need to perform pharmacological testing in lieu of exercise increased markedly between the first and fourth epochs among both diagnostic patients (from 26.5% [1634 of 6176] to 53.0% [5781 of 10,908]; P<.001) and patients with known CAD (from 31.1% [999 of 3213] to 75.5% [1405 of 1860]; P<.001). The net effect of these competing positive and negative risk factor trends was no change in the adjusted annualized rate of mortality over the temporal span in our study, ranging from 1.57% per year in 1991-1995 to 1.76% per year in 2006-2012 among diagnostic patients and from 2.46% per year to 2.75% per year during the same intervals among patients with known CAD.
    UNASSIGNED: Our findings suggest a marked contemporary shift in the drivers of all-cause mortality among patients undergoing cardiac stress tests away from such factors as typical angina and inducible myocardial ischemia, which are declining in prevalence, and toward such factors as diabetes and an inability to perform exercise, which are increasing in prevalence.
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  • 文章类型: Journal Article
    股骨头坏死(ONFH)是骨科临床中常见且难治性的疾病。全球ONFH患者的数量每年都在增加。仅在中国,估计就有812万非创伤性骨坏死患者。非创伤性骨坏死的治疗一直是骨科医师的临床挑战。为了进一步规范ONFH的诊断和治疗,这些指南不仅提供了基本的诊断,治疗,以及ONFH的评估系统,以及许多方面的专家建议和标准,包括流行病学,病因学,诊断标准,病理分期,预防和治疗选择,和术后康复。ONFH的病因目前可分为两大类:创伤性和非创伤性;然而,ONFH的具体病理机制尚不完全清楚。目前,CirculationOsseous协会制定的ONFH分期系统在临床实践中被广泛使用。根据骨内血液供应在不同阶段的变化,推荐相应的非手术和手术治疗,当存在可能的ONFH风险因素时,建议采取一定的预防措施避免骨坏死的发生。这些指南提供了骨坏死的简要分类标准和治疗方案。病因学的规范,综合考虑骨坏死不同阶段的治疗方案,髋关节功能,年龄,和患者的职业是诊断和制定治疗策略的重要步骤。
    流行病学的新进展,病因学,病理生理学,成像,本修订版更新了ONFH的诊断和治疗。该指南可供骨科专业人员和研究人员参考,并在临床指导下进行规范化诊疗管理,这有利于预防,ONFH的治疗和进一步研究,提高诊疗水平,使患者的症状得到良好控制,提高他们的生活质量。
    Osteonecrosis of the femoral head (ONFH) is a common and refractory disease in orthopaedic clinics. The number of patients with ONFH is increasing worldwide every year. There are an estimated 8.12 million patients with nontraumatic osteonecrosis in China alone. Treatment of nontraumatic osteonecrosis has always been a clinical challenge for orthopaedic surgeons. To further standardize diagnosis and treatment of ONFH, these guidelines provide not only basic diagnosis, treatment, and evaluation systems for ONFH but also expert advice and standards in many aspects, including epidemiology, aetiology, diagnostic criteria, pathological staging, prevention and treatment options, and postoperative rehabilitation. The aetiological factors of ONFH can currently be divided into two major categories: traumatic and nontraumatic; however, the specific pathological mechanism of ONFH is not completely clear. Currently, the staging system of ONFH formulated by the Association Research Circulation Osseous is widely used in clinical practice. Based on the changes in the intraosseous blood supply at different stages, the corresponding nonsurgical and surgical treatments are recommended, and when there are risk factors for possible ONFH, certain preventive measures to avoid the occurrence of osteonecrosis are recommended. These guidelines provide brief classification criteria and treatment regimen for osteonecrosis. Specification of the aetiology, treatment plan based on comprehensive consideration of the different stages of osteonecrosis, hip function, age, and occupation of the patients are important steps in diagnosis and developing treatment strategies.
    UNASSIGNED: New advances in the epidemiology, etiology, pathophysiology, imaging, diagnosis and treatment of ONFH have been renewed in this revision. This guideline can be used for reference by orthopedic professionals and researchers, and for standardized diagnosis and treatment management under the clinical guidance, which is conducive to the prevention, treatment and further research of ONFH, improving the diagnosis and treatment level, making patients\' symptoms under good control, and improving their quality of life.
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  • 文章类型: Journal Article
    癌细胞重新编程其基因表达以促进生长,生存,扩散,和侵入性。某些摄取转运蛋白在癌症中的独特表达及其在细胞中浓缩小分子底物的先天功能使其成为选择性递送成像和治疗剂进入癌细胞的理想靶标。在这次审查中,我们专注于几种已知参与将临床使用的放射性药物运输到癌细胞中的溶质载体(SLC)转运蛋白,包括钠/碘同向转运蛋白(NIS),去甲肾上腺素转运蛋白(NET),葡萄糖转运蛋白1(GLUT1),和单羧酸盐转运蛋白(MCT)。审查了这些转运蛋白的分子和功能特征,特别强调了它们在癌症中的特定表达以及与成像或治疗诊断药物的相互作用[例如,I-123,I-131,123I-iobenguane(mIBG),18F-氟代脱氧葡萄糖(18F-FDG)和13C丙酮酸盐]。讨论了这些转运蛋白在癌症诊断和治疗中的临床应用和研究领域。最后,我们就靶向转运蛋白用于癌症成像和治疗的新机会和挑战提出了我们的观点.通过分析几个临床上成功的例子,我们希望对摄取转运蛋白及其在癌症诊断和治疗中的潜在应用的癌症研究能够引起更多的兴趣。
    Cancer cells reprogram their gene expression to promote growth, survival, proliferation, and invasiveness. The unique expression of certain uptake transporters in cancers and their innate function to concentrate small molecular substrates in cells make them ideal targets for selective delivering imaging and therapeutic agents into cancer cells. In this review, we focus on several solute carrier (SLC) transporters known to be involved in transporting clinically used radiopharmaceutical agents into cancer cells, including the sodium/iodine symporter (NIS), norepinephrine transporter (NET), glucose transporter 1 (GLUT1), and monocarboxylate transporters (MCTs). The molecular and functional characteristics of these transporters are reviewed with special emphasis on their specific expressions in cancers and interaction with imaging or theranostic agents [e.g., I-123, I-131, 123I-iobenguane (mIBG), 18F-fluorodeoxyglucose (18F-FDG) and 13C pyruvate]. Current clinical applications and research areas of these transporters in cancer diagnosis and treatment are discussed. Finally, we offer our views on emerging opportunities and challenges in targeting transporters for cancer imaging and treatment. By analyzing the few clinically successful examples, we hope much interest can be garnered in cancer research towards uptake transporters and their potential applications in cancer diagnosis and treatment.
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  • 文章类型: Journal Article
    目的:介绍一种新型的3D打印假体复合材料,用于重建下肢骨恶性肿瘤切除后的大量骨缺损。设计理念,外科技术,并详细阐述了初步结果。
    方法:2015年6月至2018年11月招募需要肿瘤切除和重建的下肢原发性恶性肿瘤患者。根据术前影像学数据设计患者特定的3D打印假体。肿瘤切除后,用3D打印假体组成的复合材料进行重建,β-磷酸三钙(β-TCP)生物陶瓷和/或血管化腓骨。所有患者术后均接受定期随访。通过肌肉骨骼肿瘤学会评分(MSTS)评估功能结果。肿瘤学结果,成像结果,记录并分析并发症。
    结果:10例平均年龄为12.90岁的病例参与了这项研究。有五个股骨和五个胫骨重建。平均随访时间为16.90个月。在最后的随访中,所有患者均存活,无肿瘤复发.平均MSTS功能评分为80.33±11.05%。所有假体完好无损且稳定,没有失败或全身破裂。术后无严重并发症发生。术后X线,计算机断层扫描(CT)和单光子发射计算机断层扫描(SPECT)显示骨骼和假体复合材料之间的理想整合。此外,血管化腓骨和植入的β-TCP生物陶瓷表明体内代谢活性相对较高。
    结论:患者特异性3D打印假体结合β-TCP生物陶瓷和/或血管化腓骨为下肢恶性肿瘤摘除后重建大量骨缺损提供了极好的选择。短期随访显示,在恢复下肢功能方面有希望的临床结果,促进骨整合,减少并发症。
    OBJECTIVE: To introduce a novel 3D-printed prosthetic composite for reconstruction of massive bone defects after resection for bone malignancy of lower extremities. The design concept, surgical technique, and the preliminary outcomes were elaborated.
    METHODS: Patients with primary malignant tumors of lower extremities requiring tumor resection and reconstruction were recruited between Jun 2015 and Nov 2018. Patient-specific 3D-printed prostheses were designed according to preoperative imaging data. After tumor resection, reconstruction was performed with composites consisting of 3D- printed prosthesis, beta-tricalcium phosphate (β-TCP) bioceramics and/or vascularized fibula. All patients underwent regular follow-up postoperatively. The functional outcomes were assessed by the Musculoskeletal Tumor Society score (MSTS). Oncological outcomes, imaging results, and complications were recorded and analyzed.
    RESULTS: Ten cases averaging 12.90 years of age participated in this study. There were five femur and five tibia reconstructions. The mean follow-up period was 16.90 months. At last follow-up, all patients were alive without tumor recurrence. Average MSTS functional score was 80.33 ± 11.05%. All prostheses were intact and stable without failure or systemic breakage. No serious complications occurred after the operation. Postoperative X-ray, computed tomography (CT) and single-photon emission computed tomography (SPECT) showed an ideal integration between the bone and the prosthetic composite. Moreover, vascularized fibula and implanted β-TCP bioceramics indicated relatively high metabolic activity in vivo.
    CONCLUSIONS: Patient-specific 3D-printed prostheses combined with β-TCP bioceramics and/or vascularized fibula provide an excellent option for reconstruction of massive bone defects after lower extremity malignant tumor extirpation. Short-term follow up showed promising clinical results in recovering lower limb function, promoting osseointegration and reducing complications.
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