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1.
发作间期颞叶癫痫的18F-FDG PET 显像研究   总被引:12,自引:1,他引:11  
目的:采用诊断试验评价方法评估发作间期^18F-FDG PET显像对颞叶癫痫定性和病业定位的诊断价值,探讨其外科治疗的意义。方法:26例CT或MRI检查正常,经临床及脑电图诊断的颞叶癫痫患者在同期进行发作间期^18F-FDG PET脑显像,图像通过目测和半定量的方法进行分析,PET显示的低代谢区行皮层脑电图(EcoG)或深部脑电图(DEEG)描记以评估^18F-FDG PET检测癫痫灶的特异性,17例定位明确的单侧颞叶癫痫行前颞叶切除术,术手进行随访。2例PET未检出癫痫灶,7例DEEG定位双侧病灶未行手术治疗。结果:26例颞叶癫痫中,发现^18F-FDG PET对癫痫灶检出的灵敏度为92%(24/26),特异度为87%(21/24)。结论:从颞叶癫痫的定性定位诊断来看,发作间期^18F-FDG PET脑显像对癫痫灶的检出率较高,但^18F-FDG PET显示的低代谢区与癫痫灶的位置并非完全重叠,尚需要其他的诊断措施加以肯定,^18F-FDG PET和皮层脑电图或深部脑电图对癫痫病灶定位的一致性是手术成功的关键。  相似文献   

2.
目的探讨18F-脱氧葡萄糖(FDG)PET/CT检查在颞叶内侧癫痫(mesial temporal lobe epilepsy)术前评估和致痫灶定位中的应用价值。方法回顾性分析我科实施手术治疗的85例颞叶内侧癫痫患者的临床资料,经三大检查(症状学、MRI、V-EEG)和18F-FDG PET/CT检查证实致痫灶存在且位于颞叶内侧。经上述方法精准定位后,采用扩大额颞手术切口,皮层脑电描记引导下施行标准前颞叶切除术,部分加做海马杏仁核切除术或(和)皮层热灼术,对术前评估方法,18F-FDG PET/CT检查的意义和手术治疗预后进行分析。结果 85例患者术后随访6个月到5年,Engel效果分级:69例(81.2%)I级,9例(10.6%)Ⅱ级,7例(8.2%)Ⅲ级或Ⅳ级。4例出现硬膜外血肿,15例出现短期并发症,所有病人均无永久性并发症。患者术后服用抗癫痫药物较术前减少或停药。结论 18 F-FDGPET/CT检查是目前颞叶内侧癫痫致痫灶定位精确、直观而有效的手段之一,结合常规三大术前检查,是颞叶内侧癫痫致痫灶定位可靠的无创性检查方法。18F-FDG PET/CT检查对于颞叶内侧癫痫的术前定位诊断具有重要价值。  相似文献   

3.
目的评估~(18)F-2-氟代脱氧葡萄糖(~(18)F-FDG) PET/MRI结合神经功能定量分析软件在癫痫术前定位的临床价值。方法回顾性分析经手术治疗的60例难治性癫痫患者一体化~(18)F-FDG PET/MRI结果,以术后病理为依据,比较视觉分析与神经功能分析软件的自动定量分析结果的一致性。结果 35例癫痫患者60%中(21/35)病理结果为脑皮质发育不良,34.2%(12/35)为海马硬化,5.7%(2/35)为节细胞胶质瘤。8.5%(3/35)致痫灶定位于额叶,8.5%(3/35)定位于枕叶,余82.8%(29/35)均定位于颞叶。视觉分析与软件定量分析结果中有22例定位一致,一致率62.8%。其中2例患者~(18)F-FDG PET显像提示病变位于双侧颞叶,MIMneuro软件分析示仅一侧病变有诊断意义,且与视频EEG一致。10例患者~(18)F-FDG PET肉眼分析为阴性或疑似病灶,软件分析结果为阳性,其中8例定位于颞叶,2例定位于顶叶。1例患者视觉分析、软件定量均为阴性,手术定于基于术前视频EEG及术中皮质EEG。视觉分析与定量分析敏感性差异有统计学意义(80%vs. 97.1%,P=0.038)。结论神经功能分析法基于患者皮质葡萄糖代谢的统计学差异的定量分析,其对致痫灶检出的效能大于常规视觉分析,且量化分析结果有助于提高诊断者的信心,有利于难治性癫痫患者术前精准定位。  相似文献   

4.
目的:探讨术中皮层脑电图(ECoG)、术后组织病理和随访结果为标准,比较发作间期^18F-FDG PET显像、EEG、MRI在难治性癫痫外科手术前癫痫灶定位中的价值。方法:术前均行发作间期^18F-FDG PET脑显像、2-3次EEG和MRI检查,术中行ECoG检查,以PET和ECoG定位的癫痫灶范围行癫痫灶切除或多处软脑膜处横纤维切断术,术后切除病变组织行病理检查与外科治疗切断术,术后切除病变组织行病理检查与外科治疗效果进行随访,比较三者术前定位癫痫灶的敏感性和特异性。结果:24例术前发作间期^18F-FDG PET脑显像23例阳性,其中17例有1处明显低谢区,4例有2处明显低代谢区,2例为轻度低代谢区;(20/24)、16.7%(4/24)。PET与ECoG定位癫痫灶一致者20例,阳性检出检出出符合率为50%(10/20),MRI阳性与PET、ECoG阳性检出符合率为100%(4/4),MRI所示病变区域小于后两者所定位的癫痫灶范围。术后切除组织均有病理改变,表现为皮质结构不良、神经元固缩、胶质细胞增生、血管畸形、炎性癫痫等。随访6月-2年以上,癫痫安全消除75%。结论:发作间期^18F-FDG PET脑显像对癫痫灶检出的灵敏度较高,优于MRI和EEG,但^18F-FDG PET显示的低代谢区与癫痫灶的位置并非完全一致,特异度稍低于MRI。如能结合EEG和PET脑显像定位癫痫灶,是一种非常灵敏而有效的方法。  相似文献   

5.
许多学者认为脑PET显像不仅能诊断癫痫,且能对癫痫灶准确定位,为癫痫的手术、立体定向和放射外科治疗提供了定位依据[1].本研究分析了12例难治性癫痫患者术前18F-FDG PET脑显像与术中皮层脑电图(ECoG)检查、术后病理结果的关系,以探讨术前18F-FDG PET脑显像对癫痫灶定位的价值.  相似文献   

6.
皮层电极监测下切除致痫性脑胶质瘤的临床研究   总被引:3,自引:0,他引:3  
目的使用皮层电极监测切除致痫性脑胶质瘤,探讨致痫性脑胶质瘤的治疗方法。方法本组病人43例。EEG示轻度异常脑电图9例,巾度异常脑电罔26例,重度异常脑电图8例。CT或MRI检查皆可见占位病变。常规手术开颅显露相应部位脑皮层使用皮层电极对脑电进行监测。确定大体致痫范围,行肿瘤切除。肿瘤切除后再行脑电监测,若仍有癫痫波,根据皮层电极之定位切除致痫灶。结果22例病人行显微镜下肿瘤全切除,15例病人近全切除肿瘤.6例病人次全切除肿瘤。术后随访6个月~6年。34例(79.1%)病人癫痫症状消失,7例(16.3%)病人癫痫发作次数明显减少,2例(4.7%)病人癫痫症状未见好转。总有效率(93.7%)。结论以癫痫为主要症状的脑肿瘤病人.只有在切除胶质瘤时一并切除致痫灶,才是治疗肿瘤并根治癫痫的最佳方法。皮层电极监测下切除致痫性脑胶质瘤是治疗有癫痫症状的脑胶质瘤的有效方法。  相似文献   

7.
难治性癫痫的致痫灶定位及手术治疗研究   总被引:4,自引:1,他引:3  
目的评价难治性癫痫的致痫灶定位方法和皮层电极监测下致痫灶切除,加行多处软脑膜下横纤维切断术(MST)治疗癫痫的疗效。方法对47例难治性癫痫病人的致痫灶,采用CT MRI EEG 单光子发射计算机体层摄影(SPECT) 皮层脑电脑(ECoG)联合检测定位。对检出的阳性病灶在皮层电极监测显微镜下行致痫灶切除,切除后监测仍有癫痫波者加行MST;致痫灶位于重要功能区者单行MST。结果致痫灶阳性检出率86%。皮层电极检测显微镜下致痫灶切除加MST,术后91%的病人癫痫发作停止,半年后约15%的病人复发,但症状较术前减轻,持续时间较术前短。结论CT MRI EEG SPECT ECoG联合检测,对手术定位具有较高价值。皮层电极监测下致痫灶切除术及MST创伤轻微、效果比较可靠、治愈率高、并发症少、复发率低。病灶及致痫灶的不完全切除和形成皮层软化及疤痕,可能是导致癫痫复发的重要原因。  相似文献   

8.
目的探讨表现为难治性癫痫的低级别脑胶质瘤的临床特点,手术治疗策略。方法回顾性分析28例表现为难治性癫痫经病理检查证实为低级别胶质瘤(LGG)患者的临床表现、影像学(CT/MRI/PET)资料、脑电图(EEG/VEEG/ECoG)资料和手术方法。所有病例术前均行动态脑电图(EEG)检查明确致痫灶完成定位诊断,术中行皮质脑电(ECoG)监测,再次验证致痫灶,同时快速冰冻确诊肿瘤性质,完成定性诊断。全部患者在显微镜下先行致痫灶(肿瘤)切除术,并根据致痫灶部位的不同,加行皮质热灼,功能区行软膜下横切、颞叶病灶行患侧海马切除术。结果随访6~40个月,平均24个月癫痫症状消失(EagleI级)26例,癫痫发作次数明显减少(EagleII级)2例,肿瘤均无复发。结论表现为难治性癫痫的脑肿瘤多为低级别脑胶质瘤;术前动态EEG明确致痫灶,术中ECoG监测下切除脑肿瘤及致痫灶是控制癫痫发作的有效方法。  相似文献   

9.
颅内电极脑电监测定位致痫灶   总被引:11,自引:0,他引:11  
目的 探讨颅内埋置电极脑电图(iEEG)监测定位致痫灶的意义及其安全性。方法 对38例经无创方法难以定位的难治性癫痫病人,采用颅骨钻孔或骨瓣开颅方法埋置硬膜下和(或)深部电极,行长程视频脑电监测定位致痫灶。根据术中致痫灶定位、术后病理、术后疗效和EEG复查结果分析iEEG监测定位致痫灶的准确性。结果8例埋置深部电极,13例埋置硬膜下电极,17例联合应用硬膜下电极和深部电极。颅内电极埋置4~22d,平均9d;脑电监测8~226h,平均128h.根据癫痫发作初始期iEEG,32例(84.2%)病人准确定位了致痫灶,无颅内出血和感染等严重并发症发生。结论选择性应用硬膜下和深部电极长程视频脑电监测是一种安全、有效的检查方法;癫痫发作初始期异常放电的节律和范围是可靠的致痫灶定位指标.  相似文献   

10.
顽固性癫痫病人术前综合评估在致痫灶定位中的应用   总被引:3,自引:0,他引:3  
目的 探讨常规脑电图 (REEG)、视频脑电图 (VEEG)、MRI、SPECT检查对癫痫病的诊断及术前综合评估在致痫灶定位中的意义。方法 对 6 8例顽固性癫痫病人行REEG、VEEG、MRI及SPECT检查 ,对 4 4例顽固性癫痫病人术中行皮层电极 (ECoG)和深部电极监测 ,同时对REEG、VEEG、MRI和SPECT用于癫痫病人的诊断和致痫灶的定位价值进行对比研究。结果  6 8例癫痫患者中REEG局灶棘波检出 30例 (4 1.1% ) ,VEEG局灶棘波检出 5 1例 (75 % ) ,经统计学分析局灶棘波检出率在两者之间有显著性差异 (P <0 .0 1)。SPECT异常 32例(80 % ) ,MRI异常 4 7例 (6 9.1% )。在 4 4例行癫痫手术治疗的病人中 ,ECoG与VEEG定位一致 39例 (88.7% ) ,与MRI异常部位一致 33例 (75 % ) ,1例VEEG异常部位与MRI不一致的病例 ,经ECoG证实致痫灶为VEEG异常部位。结论 VEEG对于癫痫的诊断及致痫灶的定位有相当重要的临床价值 ,优于REEG和MRI。通过临床表现、影像学、功能性检查尤其是VEEG联合检查 ,对顽固性癫痫病人致痫灶的定位具有较大的应用价值  相似文献   

11.
PURPOSE: Positron emission tomography (PET) using 18F-radiolabeled deoxyglucose (18F-FDG) is a sensitive procedure for detection of epileptogenic foci. Although alterations in glucose consumption are not restricted to the area of seizure generation itself, the magnitude and extent of cerebral metabolic disturbances induced by epileptic discharges can be detected. Despite two decades of epilepsy research using 18F-FDG-PET, little is known about the metabolic changes during therapy of focal epilepsy. We report on a child with frontal epilepsy with severe glucose hypometabolism that was nearly completely normalized during drug therapy. METHODS: Interictal 18F-FDG-PET was performed at the onset of epilepsy and after optimized drug therapy in a 5-year-old boy with behavioral abnormalities and repetitive seizures of frontal origin with bifrontal interictal EEG slowing for 8 weeks. Both scans were anatomically matched; initial and intratherapeutic glucose metabolism were compared. RESULTS: In accordance with the epileptogenic focus as identified by EEG and ictal/interictal perfusion single-photon emission tomography (SPECT), bifrontal hypometabolism was depicted by 18F-FDG-PET. Magnetic resonance imaging (MRI) was unremarkable. After dual-drug therapy (valproate, carbamazepine), the boy became seizure free, and his initial behavioral deficits disappeared. A control PET study after 3 months of therapy showed restored glucose consumption; the frontal EEG slowing was normalized. CONCLUSIONS: This case demonstrates that reduction of glucose metabolism in epileptogenic foci may be a result of reversible neuronal dysfunction that correlates with the electroclinical follow-up.  相似文献   

12.
PURPOSE: Image processing techniques were applied to interictal positron emission tomography (PET) and single-photon emission computed tomography (SPECT) brain images to aid in the localization of epileptogenic foci by calculating a functional image that represents the degree of coupling between perfusion and metabolism. Uncoupling of these two functions has been demonstrated to be a characteristic of epileptogenic tissue in temporal lobe epilepsy and has the potential to serve as a diagnostic measure for localization in other areas as well. METHODS: Interictal PET ((18)F-FDG) and interictal SPECT ((99m)Tc-HMPAO) scans were acquired from 11 epilepsy patients. The metabolism and perfusion images were three-dimensionally spatially registered, and a functional ratio-image was computed. These functional maps are overlaid onto a three-dimensional rendering of the same patient's magnetic resonance imaging anatomy. RESULTS: In all patients, an average uniform perfusion-to-metabolism ratio showed approximately constant values throughout most of the whole brain. However, the epileptogenic area (confirmed on surgery) demonstrated an area of elevated perfusion/metabolism in the grey matter. CONCLUSIONS: Although hypometabolism in the PET image was observed in most of these patients, the calculation of a functional ratio-image demonstrated localized foci that in some cases could not be observed on the PET image alone. The ratio-image also yields a quantitative measure of the uncoupling phenomenon.  相似文献   

13.
目的 探索PET/ CT 在癫(癎)外科评估中的作用,更好地利用PET/ CT 以提高癫(癎)外科的治疗水平.方法 总结分析已经进行手术治疗的难治性局灶性癫(癎)46 例.所有病例在术前都经PET/ CT 检查(发作间期),并随访6 ~24 个月.结果 颞叶癫(癎)24 例PET/ CT 阳性,与头皮EEG 结果、MRI 及颅内电极检查结果有高度的一致性;24 例均行颞前叶海马切除术,结果Engel I-II 级者22 例.非颞叶癫(癎)22 例,行致(癎)皮层切除术,15 例达Engel Ⅰ-Ⅱ级.结论 对于颞叶癫(癎)PET/ CT 检查能协助判断侧别.对于非颞叶癫(癎),它可以帮助确定癫(癎)源的范围,指导颅内电极的植入.  相似文献   

14.
我们用 ̄~(18)F-FDG-PBT显像对126例癫痫患者进行了发作间期癫痫灶定位,男81例,女45例,年龄2~56岁,其中110例(87.3%)在PET上可发现明显相对低代谢区,而MRI或CT仅32例发现异常,头皮EEG有102例异常,但无明确定位价值。我们认为, ̄18F-FDG-PET可通过观察脑组织内的葡萄糖代谢而进行癫痫灶定位,是无创伤性癫痫灶定位的最佳方法。  相似文献   

15.
目的探讨以18氟-2-脱氧葡萄糖为显影剂的正电子发射断层扫描/计算机断层成像(18F-FDGPET/CT)对颞叶癫痫(TLE)灶的定位价值。方法本研究回顾分析被确诊为TLE的24例患者的临床资料,将术前18F-FDGPET/CT、MRI、视频脑电图(VEEG)与术中颅内电极脑电图和术后病理学检查结果进行对比研究。结果24例TLE患者中,18F-FDGPET/CT准确定位致痫灶21例,MRI准确定位10例,VEEG准确定位10例。18F-FDGPET/CT对TLE致痫灶的敏感性为87.5%(21/24),其中对内侧颢叶癫痫(MTLE)致痫灶为88.9%(16/18),对外侧颞叶癫痫(LTLE)致痫灶为83.3%(5/6)。MRI对TLE致痫灶的敏感性为41.7%(10/24),其中对MTLE致痫灶为55.5%(10/18),对LTLE致痫灶为0。VEEG对TLE致痫灶的敏感性为41.7%(10/24),其中对MTLE致痫灶为50.5%(9/18),对LTLE致痫灶为16.7(1/6)。18F-FDGPET/CT对TLE(包括MTLE和LTME)致痫灶的敏感性均显著高于MRI和VEEG(P〈0.05),而MRI和VEEG对TLE致痫灶的敏感性无显著差异(P〉0.05)。结论18F-FDGPET/CT对于TLE致痫灶定位具有独特的优势。  相似文献   

16.
The success of cortical resection for intractable epilepsy of neocortical origin is highly dependent on the accurate presurgical delineation of the regions responsible for generating seizures. In addition to EEG and structural imaging studies, functional neuroimaging such as positron emission tomography (PET) can assist lateralization and localization of epileptogenic cortical areas. In the presented studies, objectively delineated focal PET abnormalities have been analyzed in patients (mostly children) with intractable epilepsy, using two different tracers: 2-deoxy-2-[18F]fluoro-D-glucose (FDG), that measures regional brain glucose metabolism, and [11C]flumazenil (FMZ), that binds to GABAA receptors. The PET abnormalities were correlated with scalp and intracranial EEG findings, structural brain abnormalities, as well as surgical outcome data. In patients with extratemporal foci and no lesion on MRI, FMZ PET was more sensitive than FDG PET for identification of the seizure onset zone defined by intracranial EEG monitoring. In contrast, seizures commonly originated from the border of hypometabolic cortex detected by FDG PET suggesting that such areas are most likely epileptogenic, and should be addressed if subdural EEG is applied to delineate epileptic cortex. In patients with cortical lesions, perilesional cortex with decreased FMZ binding was significantly smaller than corresponding areas of glucose hypometabolism, and correlated well with spiking cortex. Extent of perilesional hypometabolism, on the other hand, showed a correlation with the life-time number of seizures suggesting a seizure-related progression of brain dysfunction. FMZ PET proved to be also very sensitive for detection of dual pathology (coexistence of an epileptogenic cortical lesion and hippocampal sclerosis). This has a major clinical importance since resection of both the cortical lesion and the atrophic hippocampus is required to achieve optimal surgical results. Finally, the author demonstrated that in patients with neocortical epilepsy, FDG PET abnormalities correctly regionalize the epileptogenic area, but their size is not related to the extent of epileptogenic tissue to be removed. In contrast, complete resection of cortex with decreased FMZ binding predicts good surgical outcome suggesting that application of FMZ PET can improve surgical results in selected patients with intractable epilepsy of neocortical origin.  相似文献   

17.
Summary: Purpose: Presurgical evaluation for intractable frontal lobe epilepsy (FLE) is difficult and invasive, partly because anatomic neuroimaging studies with computed tomography (CT) and magnetic resonance imaging (MRI) typically do not show a discrete lesion. In adult patients with FLE, functional neuroimaging of glucose metabolism with positron emission tomography (PET) is less sensitive in detecting focal metabolic abnormalities than in temporal lobe epilepsy (TLE). Comparable data on children with FLE are not available. Methods: We used high-resolution PET scanning of glucose metabolism to evaluate 13 children (age 17 months to 17 years; mean age 9.5 years) with intractable FLE being considered for surgical treatment. Only children with normal CT and MRI scans were included. Results: Hypometabolism including the frontal lobe was evident in 12 of the 13 children, was unilateral in 11 of 13, and was restricted to the frontal lobe in 8 of 13. One child showed bilateral frontal cortex hypometabolism and another had anictal PET scan demonstrating unilateral frontal cortex hyper-metabolism surrounded by hypometabolism. Additional hypo–metabolic areas outside the frontal cortex were observed in 5 children in parietal and/or temporal cortex. Localization of seizure onset on scalp EEG was available in 10 children and corresponded to the location of frontal lobe PET abnormality in 8. However, in 4 of the 10 children, the extent of hypometabolism exceeded the epileptogenic region indicated by ictal EEG. In 2 of the 13 children, the abnormality evident on EEG was more extensive than that evident on PET. In the remaining 3 children for whom only interictal EEG data were available, the PET foci did not correspond in location to the interictal EEG abnormalities. In 11 of the 13 children, the presumed region of seizure onset in the frontal lobe, as based on analysis of seizure semiology, corresponded to the locations of frontal lobe glucose metabolism abnormalities. Conclusions: Although high-resolution PET appears to be very sensitive in localizing frontal lobe glucose metabolic abnormalities in children with intractable FLE and normal CT/ MRI scans, the significance of extrafrontal metabolic disturbances requires further study; these may represent additional epileptogenic areas, effects of diaschisis, seizure propagation sites, or secondary epileptogenic foci.  相似文献   

18.
目的 探讨18氟代脱氧葡萄糖(18F-fluorodeoxyglucose,18F-FDG)正电子发射断层成像/计算机断层扫
描(positron emission tomography/computed tomography,PET/CT)脑显像评价认知障碍患者中的脑小血
管病变对皮层功能的影响。
方法 本研究为回顾性研究,纳入2009年1月~2010年12月北京协和医院PET中心行18F-FDG PET/CT
脑显像且颅脑磁共振成像(magnetic resonance imaging,MRI)提示存在小血管病变的认知障碍患者21例,
其中临床诊断血管性痴呆(vascular dementia,VaD)10例,阿尔茨海默病(Alzheimer’s disease,AD)或混
合型痴呆(mixed dementia,MD)11例。首先目测两组患者的18F-FDG PET/CT脑显像皮层及皮层下核团代
谢减低特点,并结合颅脑MRI判断病变血管对脑代谢的影响。使用NeuroQ软件和Scenium软件对18F-FDG
PET/CT脑图像在像素基础上进行定量分析比较两组患者的皮层代谢情况。
结果 通过目测和NeuroQ软件分析发现VaD组患者18F-FDG PET/CT脑显像图像特点为无规律,不对
称皮层或皮层下核团代谢减低,其中额叶皮层代谢减低范围最广,程度最重。结合颅脑MRI改变,考
虑皮层和皮层下核团代谢减低主要为小血管病变引起。AD或MD组患者脑代谢均呈现双侧颞顶叶代谢
减低,其中8例出现皮层代谢减低不对称表现,6例出现基底节丘脑不对称代谢减低表现,与典型AD
的表现不符,结合颅脑MRI表现,考虑为病变血管所致,小血管病变可能导致相应皮层代谢减低。通
过定量分析发现两组患者的SUV比值在左右顶叶、内外颞叶和枕叶差异具有显著性。
结论 18F-FDG PET/CT脑显像作为功能影像可以推断小血管病变与皮层及皮层下核团代谢的关系。  相似文献   

19.
BACKGROUND: [(11)C] alpha-methyl-L-tryptophan (alpha-MTrp) has been developed as a tracer for the study of the synthesis of serotonin in the brain with PET. However, it has been shown that in pathologic conditions the tracer may reflect the activation of kynurenine metabolism. Increased levels of serotonin and quinolinic acid have been described in resected epileptogenic cortex, raising the possibility that alpha-MTrp can localize seizure foci in patients with intractable partial epilepsy. The authors assessed the uptake of alpha-MTrp in 18 patients (11 men, mean +/- SD age 27.1 +/- 10.1 years, range 13 to 54) with intractable partial epilepsy to correlate the PET findings with the epileptogenic area defined by electroclinical and neuroimaging data. METHOD: Seven patients with cortical dysplasia (CD) and 11 with partial epilepsy in which conventional MRI and fluorine-18-deoxyglucose ((18)FDG)-PET studies failed to detect any abnormality were studied. All underwent scalp EEG monitoring during the PET scan to exclude ictal events and estimate the interictal epileptic activity. RESULTS: In seven patients (39%; CD four and cryptogenic partial epilepsy three), PET showed focal increased uptake of alpha-MTrp corresponding to the epileptogenic area. alpha-MTrp uptake in the epileptic focus correlated with the frequency of interictal spikes (r = 0.7, p < 0.05). CONCLUSIONS: alpha-MTrp-PET may be of value in the localization of the epileptogenic area not only in patients with visible dysplastic lesions, but also in those with cryptogenic partial epilepsy.  相似文献   

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