1、癌症进展2022 年 12 月第 20 卷第 24 期ONCOLOGY PROGRESS,Dec 2022 V ol.20,No.24*论著*磁共振波谱成像检查对脑胶质瘤的诊断价值磁共振波谱成像检查对脑胶质瘤的诊断价值庞瑜丹#,张玮,胡喆上海市静安区中心医院放射科,上海 2000400摘要摘要:目的目的探讨磁共振波谱成像(MRS)检查对脑胶质瘤的诊断价值。方法方法选取68例疑似脑胶质瘤患者,分别接受常规MRI检查和MRS检查,以病理检查结果为金标准,评估常规MRI、MRS单独及联合检查对脑胶质瘤的诊断价值。比较转移和未转移脑胶质瘤患者肿瘤体区和周围组织区的MRS影像参数,包括N-胰腺天门冬氨酸
2、(NAA)/肌酸(Cr)、胆碱(Cho)/NAA、脂质(Lip)+乳酸(Lac)/Cr、Cho/Cr。结果结果病理检查结果显示,68例疑似脑胶质瘤患者中,阳性41例,阴性27例。常规MRI、MRS联合检查诊断脑胶质的灵敏度、特异度、准确度、阳性预测值、阴性预测值均高于二者单独检查。41例脑胶质瘤患者中,12例患者最终发生转移,29例患者未发生转移,分别作为转移组和未转移组,未转移组患者周围组织区NAA/Cr明显低于转移组,Cho/Cr、Cho/NAA均明显高于转移组,差异均有统计学意义(P0.01)。结论结论MRS检查对脑胶质瘤有较高的诊断效能,联合常规MRI检查可获得较高的诊断灵敏度、特异度
3、和准确度,可为临床诊疗提供影像学依据。关键词关键词:脑胶质瘤;诊断价值;磁共振波谱成像;MRI中图分类号中图分类号:R R739739.4141文献标志码文献标志码:AdoiAdoi:10.11877/j.issn.1672-1535.2022.20.24.12Diagnostic value of magnetic resonance spectroscopy in gliomaDiagnostic value of magnetic resonance spectroscopy in gliomaPANG Yudan#,ZHANG Wei,HU ZheDepartment of Radio
4、logy,Shanghai Jing an District Central Hospital,Shanghai 200040,ChinaAbstract:ObjectiveAbstract:ObjectiveTo explore the diagnostic value of magnetic resonance spectroscopy(MRS)in patients with gli-oma.MethodMethodA total of 68 patients with suspected glioma were selected to receive routine MRI exami
5、nation and MRSexamination respectively.The diagnostic value of routine MRI and MRS examination alone and jointly for glioma wasevaluated based on the results of pathological examination.Compare the MRS imaging parameters of tumor body areaand surrounding tissue area of patients with and without meta
6、stasis,including N-pancreatic aspartic acid(NAA)/creatine(Cr),choline(Cho)/NAA,lipid(Lip)+lactic acid(Lac)/Cr,Cho/Cr.ResultResultPathological examination showed thatamong 68 patients with suspected glioma,41 were positive and 27 were negative.The sensitivity,specificity,accuracy,positive predictive
7、value and negative predictive value of conventional MRI combined with MRS in the diagnosis of cere-bral glia were higher than those of the two examinations alone.Among 41 patients with glioma,12 patients eventually me-tastasized and 29 patients did not metastasize.As the metastatic group and the non
8、-metastatic group,the NAA/Cr in thesurrounding tissue area of the non-metastatic group was significantly lower than that of the metastatic group,and Cho/Cr,Cho/NAA were significantly higher than those of the metastatic group,the differences were statistically significant(P0.01).ConclusionConclusionM
9、RS examination has a high diagnostic efficiency for glioma.Combined with conventional MRI ex-amination,it can obtain high diagnostic sensitivity,specificity and accuracy,and provide imaging basis for clinical diagno-sis and treatment.Key words:Key words:glioma;diagnostic value;magnetic resonance spe
10、ctroscopy;MRIOncol Prog,2022,20(24)脑胶质瘤是由大脑、脊髓胶质细胞癌变引起的原发性颅内肿瘤,年发病率为 3/10 万8/10 万1。脑胶质瘤发病机制复杂且发病多与先天的遗传高危因素、环境因素等共同作用有关,临床上常根据肿瘤形态、恶性程度、病灶部位进行分类2。既往研究表明,脑胶质瘤临床表现复杂,主要取决于占位效应及其影响的脑区功能,随着病程的延长可引起头痛、恶心呕吐、视物模糊等,严重者可引起视觉丧失、疼痛及麻木等,影响患者的生活质量和生命健康3。病理学检查是诊断脑胶质瘤的金标准,能判断病灶性质、部位,可指导手术及放化疗,但该检查方法创伤较大、可重复性差,难以在基
11、层医院推广应用4-5。磁共振波谱成像(magnetic reso-nance spectroscopy,MRS)检查是一种磁共振检查的新技术,是唯一能在活体、无创状态下反映不同类型脑肿瘤代谢过程及方式的检查方法,能广泛应用于脑肿瘤分级、治疗及鉴别诊断中,但其诊断价值及效能存在争议6-7。本研究探讨MRS检查在#通信作者(corresponding author),邮箱:2527癌症进展2022年12月第20卷第24期脑胶质瘤中的诊断价值,现报道如下。1 1资料与方法资料与方法1 1.1 1 一般资料一般资料选取2019年9月至2021年5月上海市静安区中心医院收治的疑似脑胶质瘤患者。纳入标准:
12、均进行MRI、MRS检查及病理学检查8;伴有不同程度头痛、头昏、肢体乏力、呕吐等症状,部分患者伴有视力下降、语言不清等;均无MRS检查禁忌证,且患者均可耐受;病历资料完整。排除标准:合并严重颅脑损伤,具有手术或放化疗史;合并精神异常、认知功能异常或伴有自身免疫系统疾病;合并其他部位恶性肿瘤、转移瘤。依据纳入和排除标准,本研究共纳入68例疑似脑胶质瘤患者,其中男39例,女29例;年龄3579岁,平均(56.847.49)岁;体重指数(body mass index,BMI)为1829 kg/m2,平均(23.293.61)kg/m2;病程16个月,平均(3.230.51)个月;合并症:高血压4例
13、,糖尿病2例,高脂血症6例。本研究经医院伦理委员会批准通过,所有患者均知情同意并签署知情同意书。1 1.2 2 检查方法检查方法所有患者均接受3.0T磁共振扫描仪进行MRI常规扫描,采用二维多体素波谱图像(2D-CSI)获得MRS图像,并将检查结果与病理结果进行比较,分析其诊断价值,具体方法如下。常规MRI检查:采用GE 3.0T Signa 750磁共振仪对患者进行检查,标准头部表面线圈,检查时患者取仰卧位,头先进,常规完成MRI检查,设定相关序列参数。T1加权液体衰减反转恢复(T1-fluidattenuated inversion recovery,T1-FLAIR)序列:重复时 间(r
14、epetition time,TR)2505.6 ms,回 波 时 间(echo time,TE)24.0 ms,层厚6.0 mm,层距2.0 mm,矩阵 320224,视野 280 mm280 mm。T2 加权液体衰减反转恢复(T2-fluid attenuated inversion re-covery,T2-FLAIR)序列:TR 为 8000.0 ms,TE 为145.0 ms,层厚 6.0 mm,层距 2.0 mm,矩阵 256224,视野280 mm280 mm。T2 Propeller序列:TR为 4690.0 ms,层厚 6.0 mm,层距 2.0 mm。弥散加权成像(diff
15、usion weighted imaging,DWI):TR 为3800.0 ms,TE为61.6 ms,层厚6.0 mm,层距2.0 mm,矩阵128128,视野280 mm280 mm。T1加权成像(T1 weighted imaging,T1WI):TR 为 2578.5 ms,TE为 24.0 ms,层厚 6.0 mm,层距 1.0 mm,矩阵 320224,视野 280 mm280 mm。对于需要进行增强MRI 检查的患者,扫描前经肘静脉注射钆喷替酸葡甲胺 0.2 mmol/kg,常规MRI扫描后采用电分辨波谱(PRESS)程序进行增强扫描。MRS影像检查采用GE 3.0T Sign
16、a 750磁共振工作站中波谱处理软件,以 MRI 常规扫描影像为依据对患者进行检查。患者取仰卧位,根据MRS的影像特点完成扫描层面的选择,完成多体素波谱检查,结合检查部位设定相关参数:单体素 TR为 1500 ms,TE 为 35 ms,采集时间 228 s;多体素TR为1000 ms,TE为144 ms,选择感兴趣体素(体素大小10 mm10 mm10 mm),采集时间328 s。影像学分析:感兴趣区(region of interest,ROI)包括肿瘤体区、周围组织区及对侧正常脑组织区,其中,肿瘤体区指 T1WI 明显强化,且无囊变坏死区域;周围组织区指T1WI图像上呈均匀低信号,T2加权成像上呈均匀高信号,未见确切明显强化且尽可能靠近肿瘤实质边缘,需结合 MRI 增强图像结果。对照平扫及增强图像,在波谱图像层面分别于肿瘤体区、周围组织区及对侧正常脑组织区3个部位选择谱线质量良好的体素作为 ROI,采用Linux工作站Functool软件及高斯曲线拟合N-胰腺天门冬氨酸(N-pancreatic aspartic acid,NAA)、肌酸(creatine,Cr)、胆碱(chol