健康人体68Ga-DOTATATE动态分布显像与吸收剂量

目的 评估⁶⁸Ga-1,4,7,10-四氮杂环十二烷-1,4,7,10-四乙酸-D-苯丙氨酸1-酪氨酸3-苏氨酸8-奥曲肽（DOTATATE） PET/CT显像中显像剂在健康人体内分布情况及主要器官吸收剂量。方法 对8名健康受试者经静脉注射100~200 MBq ⁶⁸Ga-DOTATATE后行动态PET/CT显像,于低剂量CT图像上手动勾画各源器官ROI并同步至PET图像,计算全身及靶器官⁶⁸Ga-DOTATATE滞留时间、吸收剂量和全身有效剂量（ED）。结果 全身⁶⁸Ga-DOTATATE平均滞留时间为（1.38±0.29） h。源器官中,⁶⁸Ga-DOTATATE在肝脏滞留时间最长,其次为双肾,于甲状腺滞留时间最短。检查过程中受试者吸收剂量2.34~3.98 mGy,平均（3.11±0.62） mGy;ED为2.32~2.61 mSv,平均（2.39±0.13） mSv;源器官中脾脏吸收剂量最高,其次为膀胱、双肾,脑吸收剂量最低。结论 ⁶⁸Ga-DOTATATE在健康人体内滞留于肝脏的时间最长,脾脏吸收剂量最高,但均处于安全范围。     

18F-AlF-NOTA-octreotide联合18F-FDG PET/CT显像用于神经内分泌瘤

目的 观察¹⁸F-AlF-NOTA-octreotide（¹⁸F-OCT）联合¹⁸F-FDG PET/CT显像用于神经内分泌瘤（NET）的临床价值。方法 回顾性分析21例同期接受¹⁸F-OCT和¹⁸F-FDG PET/CT显像并经病理学证实的NET患者,其中7例已接受原发瘤根治性切除术、2例原发灶不明;根据2010年WHO分级标准,将12例明确存在原发瘤者分为中/低级别组9例和高级别组3例,对比原发瘤及转移灶在2种显像中的阳性比例、摄取水平及治疗后影像学变化。结果 原发瘤大小与¹⁸F-FDG最大标准摄取值（SUV_max）显著相关（r=0.731,P<0.05）,但与¹⁸F-OCT无明显相关（r=0.311,P>0.05）。中/低级别组9例原发瘤中,8例¹⁸F-OCT显像阳性,SUV_max中位数为33.80（6.10,56.55）;7例¹⁸F-FDG显像阳性,SUV_max中位数3.80（1.40,8.80）（Z=-2.345,P<0.05）。高级别组3例原发瘤中,¹⁸F-FDG检出3例,¹⁸F-OCT 2例。¹⁸F-OCT联合¹⁸F-FDG PET/CT显像检测转移灶阳性比例高于单一。追踪观察1例胰腺NET术后肝脏多发转移患者,奥曲肽对其¹⁸F-OCT显像阳性病灶取得良好疗效。结论 ¹⁸F-OCT联合¹⁸F-FDG PET/CT显像可作为检测NET的辅助手段,并有望用于预估疗效。     

前纵隔肿瘤18F-FDG PET/CT显像特征

目的 观察前纵隔肿瘤¹⁸F-FDG PET/CT显像特征。方法 回顾性分析28例经病理证实的前纵隔肿瘤患者的¹⁸F-FDG PET/CT资料。28例中,侵袭性胸腺瘤6例,胸腺癌8例,淋巴瘤12例,精原细胞瘤2例。观察不同肿瘤¹⁸F-FDG PET/CT显像特征,测量肿瘤最大径及最大标准摄取值（SUV_max）,比较侵袭性胸腺瘤、胸腺癌及淋巴瘤患者肿瘤最大径及SUV_max差异。结果 侵袭性胸腺瘤、胸腺癌及精原细胞瘤¹⁸F-FDG PET/CT见前纵隔内形态不规则、密度不均匀软组织肿物。淋巴瘤¹⁸F-FDG PET/CT见前纵隔内多个结节融合成团块状肿物,密度均匀。侵袭性胸腺瘤、胸腺癌和淋巴瘤间肿瘤最大径差异无统计学意义（P=0.746）;胸腺癌和淋巴瘤SUV_max（11.54±3.79、14.11±4.34）高于侵袭性胸腺瘤（4.87±0.38）,差异均有统计学意义（P=0.003、0.001）,胸腺癌与淋巴瘤SUV_max差异无统计学意义（P=0.189）。结论 前纵隔肿瘤的¹⁸F-FDG PET/CT表现具有一定特征,有助于临床诊断。     

13例睾丸原发癌及其转移癌18F-FDG PET/CT表现

目的 观察睾丸原发癌及其转移癌¹⁸F-FDG PET/CT表现。方法 回顾性观察13例经病理证实的睾丸原发癌患者治疗前¹⁸F-FDG PET/CT资料,分析原发癌及其转移癌影像学特点。结果 共检出14个原发肿瘤,包括7例7个精原细胞瘤及6例7个非精原细胞肿瘤,平均最大径(3.44±1.75)cm;PET/CT均呈¹⁸F-FDG高摄取,中位最大标准摄取值(SUV_max)10.20(5.95,22.10),精原细胞瘤 与非精原细胞肿瘤 SUV_max差异无统计学意义 (Z=-0.96,P=0.338)。睾丸原发肿瘤SUV_max与其最大径、Ki-67指数均无明显相关(P均>0.05)。1例(1/13,7.69%)左侧精索受侵,SUV_max 8.80。13例中,11例(11/13,84.62%)存在淋巴结转移,以腹膜后淋巴结最常见,其次为纵隔及髂血管旁淋巴结转移,均表现为¹⁸F-FDG高摄取,平均SUV_max 15.65±7.97;8例(8/13,61.54%)发生血行转移,多表现为¹⁸F-FDG高摄取,以肺及肝脏受累最多,平均SUV_max分别为12.66±8.55和16.42±8.81。结论 睾丸原发癌均表现为¹⁸F-FDG摄取增高,可侵犯精索并转移至全身淋巴结、肺及肝脏等;转移癌亦多¹⁸F-FDG高摄取。     

18F-FDG PET/CT诊断肾脏病合并肿瘤

目的 评价¹⁸F-FDG PET/CT诊断肾脏病合并肿瘤的应用价值。方法 回顾性分析146例肾脏病患者的¹⁸F-FDG PET/CT表现,检测病灶最大标准摄取值（SUV_max）;以病理学结果作为诊断金标准,计算¹⁸F-FDG PET/CT对肾脏病合并肿瘤的诊断效能。结果 146例肾脏病患者中,29例并发恶性肿瘤,其中肿瘤继发肾损害19例、肾损害伴发肿瘤10例。PET/CT发现72例存在¹⁸F-FDG高摄取灶,病灶SUV_max为5.25±3.94;诊断肿瘤34例,最终确诊29例、误诊5例,诊断灵敏度100%（29/29）,特异度88.37%（38/43）。肿瘤继发肾损害病灶SUV_max为5.95±3.02,肾损害伴发肿瘤病灶SUV_max为6.58±5.29,差异无统计学意义（P>0.05）。结论 ¹⁸F-FDG PET/CT可用于筛查肾脏病患者是否合并肿瘤,但对于肿瘤与肾损害关系的诊断价值有限。     

国人脊柱与骨盆99mTc-MDP定量SPECT/CT标准化摄取值的正常分布特点

目的：探讨骨显像单光子发射计算机体层成像/计算机体层成像（SPECT/CT）骨定量分析国人脊柱及骨盆的标准化摄取值（SUV）的正常分布。方法：回顾性分析500例入组肿瘤骨转移患者的锝[^99mTc]-亚甲基二磷酸盐（^99mTc-MDP）骨定量SPECT/CT显像数据。在正常颈、胸、腰、骶椎及骨盆骨骼处勾画感兴趣区,测量最大（maximum）和平均（mean）SUV（SUV_max和SUV_mean）,统计分析SUV值在正常骨骼的分布及其与年龄、身高、体质量和CT值的相关性。结果：SUV_max和SUV_mean在第6颈椎最大,分别为7.4±2.5和6.0±2.2,在第3骶椎最小,分别为4.4±2.0和2.2±1.1。脊柱及骨盆SUV_max和SUV_mean的变异系数（CV）大小相近,分别在31.6%~45.6%和34.1%~52.7%,骨盆组成骨SUV_max（CV_骨盆=42.4%、CV_脊柱=35.0%）和SUV_mean（CV_骨盆=52.7%、CV_脊柱=38.3%）个体间差异略大于脊柱。骨骼SUV值在不同性别间无统计学差异。脊柱及骨盆的SUV_max和SUV_mean与身高均无显著相关性,与年龄负相关,与体质量及CT值正相关。结论：骨定量SPECT/CT可获得^99mTc-MDP在正常骨骼中的SUV值,可用于骨转移诊断及评估的参考;不同部位骨骼SUV值存在一定差异,应用SUV值诊断和评估肿瘤骨转移时需具体部位具体分析。     

68Ga-DOTA-TATE与18F-FDG PET/CT对比显像用于神经内分泌肿瘤

目的 观察⁶⁸Ga-1,4,7,10-四氮杂环十二烷-1,4,7,10-四乙酸-D-苯丙氨酸1-酪氨酸3-苏氨酸8-OC（DOTA-TATE）和¹⁸F-FDG PET/CT显像用于神经内分泌肿瘤（NET）的临床价值。方法 回顾性分析39例疑似NET并先后接受⁶⁸Ga-DOTA-TATE和¹⁸F-FDG PET/CT显像患者,以组织病理学诊断结果为金标准,分析2种显像对NET的诊断效能,比较不同病理分级NET病灶的⁶⁸Ga-DOTA-TATE和¹⁸F-FDG最大标准摄取值（SUV_max）。结果 ⁶⁸Ga-DOTA-TATE PET/CT显像诊断NET的敏感度、特异度、阳性预测值（PPV）、阴性预测值（NPV）及准确率分别为96.55%（28/29）、80.00%（8/10）、93.33%（28/30）、88.89%（8/9）及92.31%（36/39）,¹⁸F-FDG PET/CT显像分别为82.76%（24/29）、100%（10/10）、100%（24/24）、66.67%（10/15）及87.18%（34/39）。39例中,29例获得病理分级,包括5例G1级、16例G2级和8例G3级 NET;其中G1级、G2级及G3级NET在⁶⁸Ga-DOTA-TATE PET/CT中的SUV_max分别为28.80（15.20,44.80）、10.55（5.98,22.93）及4.70（3.90,7.50）,3个级别差异具有统计学意义（H=9.06,P=0.01）;其在¹⁸F-FDG PET/CT中的SUV_max依次为3.10（2.38,5.85）、3.10（1.82,5.18）、7.10（1.70,9.93）,3个级别差异无统计学意义（H=2.19,P=0.34）。结论 ⁶⁸Ga-DOTA-TATE PET/CT显像用于诊断NET及分期的价值高于¹⁸F-FDG PET/CT,且其SUV_max与病理分级相关。     

肺硬化性肺泡细胞瘤的18F-FDG PET/CT显像特征

目的 探讨肺硬化性肺泡细胞瘤（PSP）的¹⁸F-FDGPET/CT显像特征。方法 回顾性分析16例经病理证实为PSP的患者的临床及PET/CT资料。观察病变的部位、形态、大小、病灶内部及边缘情况、代谢情况,测量病灶的最大标准化摄取值（SUV_max）。对其中6例接受¹⁸F-FDGPET/CT双时相显像的患者,计算平均滞留指数（RI）。比较早期与延迟期SUV_max的差异,并分析病灶直径与SUV_max的相关性。结果 16例患者共16个病灶,位于右肺7个,位于左肺9个。病灶均呈圆形或类圆形,直径（1.97±0.61）cm,密度均匀,无囊变及坏死,CT值（29.87±4.71）HU。5个病灶可见钙化。14个病灶边缘光滑,2个病灶边缘可见短毛刺。2个病灶可见边缘磨玻璃影,12个病灶存在"血管贴边征",3个病灶存在"空气新月征"。PSP病灶SUV_max值为 2.71±2.13。6例双时相显像患者早期（2.44±1.57）与延迟期SUV_max值（2.74±1.83）差异无统计学意义（t=2.09,P>0.05）,RI为（7.23±10.29）%。PSP病灶直径与SUV_max间无相关性（r=0.188,P>0.05）。结论 PSP的PET/CT多表现为孤立性肺结节,其放射性分布呈轻或中度增高,"血管贴边征"和"空气新月征"及周围磨玻璃影常提示PSP可能性。     

基于患者体质量指数的68Ga-DOTA-NOC PET/CT最佳采集条件

目的 探讨基于患者体质量指数（BMI）的⁶⁸Ga-1,4,7,10-四氮杂环十二烷-1,4,7,10-四乙酸-1-柰丙氨酸-奥曲肽（DOTA-NOC）PET/CT最佳采集条件。方法 收集89例接受⁶⁸Ga-DOTA-NOC PET/CT全身扫描的神经内分泌肿瘤患者,根据体质量指数分为偏瘦组（n=13）、正常组（n=40）、超重组（n=31）和肥胖组（n=5）。以真符合计数率、随机符合计数率、等效噪声比（NECR）、随机分数和变异系数（CV）评估PET图像质量,分析其与BMI的关系,并比较4组间差异。结果 89例患者平均BMI为（22.99±3.77）kg/m²,⁶⁸Ga-DOTA-NOC注射剂量为（1.04±0.27）MBq/kg体质量。真符合计数率、随机符合计数率和NECR均与显像剂注射剂量呈线性正相关（r=0.71、0.71、0.72,P均<0.01）。NECR在显像剂注射剂量约为1.65 MBq/kg体质量时获得最大值。4组真符合计数率差异有统计学意义（F=6.26,P<0.01）,且BMI正常组患者真符合计数率与偏瘦组、超重组和肥胖组的比值分别为0.82、1.12和1.28。CV值随显像剂注射剂量的增加而下降（r=0.78,P<0.01）,4组间差异有统计学意义（F=16.48,P<0.01）。4组间随机分数差异无统计学意义（F=1.33,P=0.27）。结论 基于患者BMI,⁶⁸Ga-DOTA-NOC PET/CT推荐方案如下：偏瘦患者显像剂注射剂量参考范围为1.05~1.15 MBq/kg体质量,最大不超过1.30 MBq/kg体质量;超重患者和肥胖患者的每床位采集时间分别延长1.2~1.3倍和1.3~1.5倍。     

女性正常子宫内膜及卵巢对18F-FDG的生理性摄取特点

目的 观察女性正常子宫内膜及卵巢¹⁸F-FDG生理性摄取特点。方法 收集107名经临床、B超、CT及随访证实为子宫内膜、卵巢¹⁸F-FDG生理性摄取的女性受检者的PET/CT显像资料。按照是否绝经分为绝经组(29名)及未绝经组(78名)。应用目测法及半定量分析法分析PET/CT图像特征,测量ROI最大标准摄取值(SUV_max)与卵巢最大直径(T_max)。结果 绝经组无子宫内膜及卵巢生理性摄取。未绝经组25名存在子宫内膜生理性摄取,多在排卵期及月经期,其中排卵期10名,平均SUV_max为4.0±0.6;月经期8名,平均SUV_max为5.1±0.9;35名有卵巢生理性摄取,排卵期多见,有28名,平均SUV_max为4.2±0.8。左侧卵巢T_max为(2.4±0.7)cm,右侧为(2.5±0.5)cm。结论 已绝经女性无子宫内膜及卵巢生理性摄取;未绝经女性在月经周期各阶段子宫内膜及卵巢生理性摄取各具特点。     

Human Biodistribution and Radiation Dosimetry of the P-Glycoprotein Radiotracer [11C]Metoclopramide

Purpose

To assess in healthy volunteers the whole-body distribution and dosimetry of [¹¹C]metoclopramide, a new positron emission tomography (PET) tracer to measure P-glycoprotein activity at the blood-brain barrier.

Procedures

Ten healthy volunteers (five women, five men) were intravenously injected with 387?±?49 MBq of [¹¹C]metoclopramide after low dose CT scans and were then imaged by whole-body PET scans from head to upper thigh over approximately 70 min. Ten source organs (brain, thyroid gland, right lung, myocardium, liver, gall bladder, left kidney, red bone marrow, muscle and the contents of the urinary bladder) were manually delineated on whole-body images. Absorbed doses were calculated with QDOSE (ABX-CRO) using the integrated IDAC-Dose 2.1 module.

Results

The majority of the administered dose of [¹¹C]metoclopramide was taken up into the liver followed by urinary excretion and, to a smaller extent, biliary excretion of radioactivity. The mean effective dose of [¹¹C]metoclopramide was 1.69?±?0.26 μSv/MBq for female subjects and 1.55?±?0.07 μSv/MBq for male subjects. The two organs receiving the highest radiation doses were the urinary bladder (10.81?±?0.23 μGy/MBq and 8.78?±?0.89 μGy/MBq) and the liver (6.80?±?0.78 μGy/MBq and 4.91?±?0.74 μGy/MBq) for female and male subjects, respectively.

Conclusions

[¹¹C]Metoclopramide showed predominantly renal excretion, and is safe and well tolerated in healthy adults. The effective dose of [¹¹C]metoclopramide was comparable to other ¹¹C-labeled PET tracers.

     

13N-NH3PET显像在星形细胞瘤中的诊断价值

目的探讨13N-NH3PET显像在脑星形细胞瘤中的诊断价值。方法30例拟诊胶质瘤患者,全部做了13N-NH3PET动态显像,其中17例患者同期完成了18F-FDGPET显像,所有患者均有MRI或CT检查结果,并且通过手术病理、穿刺活检或随访获得了临床最终诊断。由两位有经验的医师同时阅片,至少连续在两帧图像上出现无摄取或相对低的摄取为阴性,高度或中度摄取为阳性。结果15例星形细胞瘤中,14例13N-NH3PET显像阳性,灵敏度为93.3%,15例非星形细胞瘤中,11例为阴性,特异度为73.3%;诊断准确性为83.3%。同期MRI诊断灵敏度为66.7%。另18F-FDGPET显像6例,5例有阳性发现(83.3%)。肿瘤组织与正常脑白质放射性计数(T/WM)比值为0.97~2.49(1.94±0.41);非星形细胞瘤中,病灶组织与正常脑白质放射性计数(T/WM)比值为0.64~2.54(1.06±0.62)。两组比较有统计学差异。结论13N-NH3PET显像在脑星形细胞瘤的诊断中具有临床应用价值。     

Biodistribution and Radiation Dosimetry of the Carbonic Anhydrase IX Imaging Agent [18 F]VM4-037 Determined from PET/CT Scans in Healthy Volunteers

Purpose

[¹⁸?F]VM4-037 has been developed as a positron emission tomography (PET) imaging marker to detect carbonic anhydrase IX (CA-IX) overexpression and is being investigated for use as a surrogate marker for tissue hypoxia. The purpose of this study was to determine the biodistribution and estimate the radiation dose from [¹⁸?F]VM4-037 using whole-body PET/CT scans in healthy human volunteers.

Procedures

Successive whole-body PET/CT scans were performed after intravenous injection of [¹⁸?F]VM4-037 in four healthy humans. The radiotracer uptakes in different organs were determined from the analysis of the PET scans. Human radiation doses were estimated using OLINDA/EXM software.

Results

High uptake of [¹⁸?F]VM4-037 was observed in the liver and kidneys, with little clearance of activity during the study period, with mean standardized uptake values of ~35 in liver and ~22 in kidneys at ~1 h after injection. The estimated effective dose was 28?±?1 μSv/MBq and the absorbed doses for the kidneys and liver were 273?±?31 and 240?±?68 μGy/MBq, respectively, for the adult male phantom. Hence, the effective dose would be 10?±?0.5 mSv for the anticipated injected activity of 370 MBq, and the kidney and liver doses would be 101?±?11 and 89?±?25 mGy, respectively.

Conclusions

[¹⁸?F]VM4-037 displayed very high uptake in the liver and kidneys with little clearance of activity during the study period, resulting in these organs receiving the highest radiation doses among all bodily organs. Though the effective dose and the organ doses are within the limits considered as safe, the enhanced uptake of [¹⁸?F]VM4-037 in the kidneys and liver will make the compound unsuitable for imaging overexpression of CA-IX in those two organs. However, the tracer may be suitable for imaging overexpression of CA-IX in lesions in other regions of the body such as in the lungs or head and neck region.     

Lacrimal Glands May Represent Organs at Risk for Radionuclide Therapy of Prostate Cancer with [<Superscript>177</Superscript>Lu]DKFZ-PSMA-617

Purpose

Calculating the absorbed dose is important for the determination of risk and therapeutic benefit of internal radiation therapy. The aim of this study was to perform image-based absorbed dose calculation for critical organs during the first cycle of [¹⁷⁷Lu]DKFZ-PSMA-617 therapy in a small cohort of patients with metastatic prostate cancer.

Procedures

Nine patients with a history of prostate cancer documented by histopathology and radiologic evidence of metastatic diseases underwent radioligand therapy with [¹⁷⁷Lu]DKFZ-PSMA-617. Conjugated planar whole-body scintigraphies acquired at 0.5, 24, 48, 72, and 168 h post-injection were analyzed by regions of interest, and time-activity curves were generated for various organs. Cumulated activities and residence times were calculated by bi-exponential fit of the time-activity curves. Mean absorbed doses were finally estimated using OLINDA/EXM1.1?. Additionally, the uncertainty when omitting the last measurement (168 h p.i.) was studied.

Results

The following mean absorbed doses were calculated: 2.82 mGy/MBq for the lacrimal glands, 0.72 mGy/MBq for the salivary glands, 0.53 mGy/MBq for the kidneys, and 0.42 mGy/MBq for the nasal mucous membrane. Omitting the last measurement resulted in a mean deviation of 10 to 25 % for absorbed dose values as compared to the ones received by analyzing all measurements.

Conclusion

Absorbed organ doses of [¹⁷⁷Lu]DKFZ-PSMA-617 therapy are not likely to be critical for kidneys, salivary glands, and the nasal mucous membrane. The lacrimal glands may represent the dose-limiting organs. Whole-body scintigraphy appears sufficient for dose estimation, but late measurements are mandatory, if accurate dose calculation is required.

     

原发性腹膜后肿瘤的

目的 观察原发性腹膜后肿瘤的¹⁸F-FDG PET/CT显像特征。方法 回顾性分析32例经病理证实的原发性腹膜后肿瘤¹⁸F-FDG PET/CT显像资料。观察不同病理类型肿瘤的¹⁸F-FDG PET/CT显像特征,测量肿瘤最大径及最大标准摄取值（SUV_max）,比较良、恶性肿瘤最大径及SUV_max差异。结果 恶性肿瘤18例,17例形态不规则,14例边界不清,11例¹⁸F-FDG 摄取不均匀,2例可见远处转移;良性肿瘤14例,13例呈圆形或椭圆形,边界均清晰,11例¹⁸F-FDG摄取均匀,1例神经鞘瘤及1例畸胎瘤¹⁸F-FDG无摄取。恶性肿瘤SUV_max（11.93±7.01）明显高于良性肿瘤（3.66±2.20）,差异有统计学意义（Z=-4.103,P<0.001）;恶性肿瘤与良性肿瘤最大径的差异亦有统计学意义（Z=-3.287,P=0.001）。结论 原发性腹膜后肿瘤的¹⁸F-FDG PET/CT表现具有一定特征,有助于临床诊断。     

18F-FDG PET/CT评估眼球脉络膜黑色素瘤

目的观察¹⁸F-FDG PET/CT用于评价脉络膜黑色素瘤(CM)的价值。方法纳入22例临床疑诊为CM的患者,行¹⁸F-FDG PET/CT全身显像,进行影像学诊断并测量相关参数。以病理或最终临床诊断为标准,计算PET/CT诊断CM的效能。采用Spearman相关性分析评价最大标准摄取值(SUV_max)、平均标准摄取值(SUV_mean)、肿瘤代谢体积(MTV)及病灶糖酵解总量(TLG)与病灶基底最大径、高度之间的相关性。结果22例中,PET/CT诊断20例CM、2例眼球良性病变;其中14例经病理确诊CM,PET/CT诊断CM的敏感度、特异度及准确率分别为100%(14/14)、25.00%(2/8)及72.73%(16/22)。14例CM病灶CT均表现为边界清晰的高密度影,平均CT值(83.96±25.18)HU,病灶基底最大径为(1.46±0.50)cm,高度为0.66(0.50,1.28)cm;PET/CT显示病灶糖代谢均高于对侧眼球,SUV_max为5.10(3.44,7.88),SUV_mean为3.62(2.37,5.23),MTV为0.68(0.49,1.29)cm³,TLG为2.69(1.22,6.08)g。病灶MTV、TLG与病灶基底最大径(r=0.607、0.664,P均<0.05)及高度(r=0.829、0.758,P均<0.05)均呈正相关;SUV_max、SUV_mean与病灶基底最大径(r=0.493、0.343,P均>0.05)及高度(r=0.464、0.398,P均>0.05)均无显著相关性。结论¹⁸F-FDG PET/CT用于评估CM敏感度高、准确率较好,但特异度有限。