常规MRI联合DWI在腮腺常见肿瘤中的诊断价值

目的:探讨常规MRI联合DWI对腮腺常见肿瘤的诊断价值。方法:回顾性分析经病理证实的62例腮腺肿瘤的MRI图像,根据其DWI图行ADC图重建,测量肿瘤的ADC值。按发病率将62例病例分成3组:多形性腺瘤、腺淋巴瘤、恶性肿瘤。多形性腺瘤31例,全部单发;腺淋巴瘤19例,9例单发,10例多发,共30个病灶;恶性肿瘤12例,3例淋巴瘤多发,其余均为单发,共18个病灶。比较分析3种肿瘤的ADC值。结果:多形性腺瘤和腺淋巴瘤多发生于腮腺浅叶(43个,70.5%),肿瘤边界多清楚,体积一般较恶性肿瘤小;恶性肿瘤位于深叶者8个(44.4%),边界清楚或不清楚,多伴有颈部淋巴结肿大(10例,83.3%)。多形性腺瘤及恶性肿瘤平均ADC值均高于腺淋巴瘤(P=0.000、0.002),且多形性腺瘤平均ADC值高于恶性肿瘤(P=0.001)。结论:腮腺肿瘤的常规MRI征象具有一定特点,联合DWI能为腮腺常见肿瘤的诊断及鉴别诊断提供更多依据。     

Value of routine MRI in combination with DWI in the diagnosis of parotid gland tumors

目的:探讨常规MRI联合DWI对腮腺常见肿瘤的诊断价值.方法:回顾性分析经病理证实的62例腮腺肿瘤的MRI图像,根据其DW1图行ADC图重建,测量肿瘤的ADC值.按发病率将62例病例分成3组:多形性腺瘤、腺淋巴瘤、恶性肿瘤.多形性腺瘤31例,全部单发;腺淋巴瘤19例,9例单发,10例多发,共30个病灶;恶性肿瘤12例,3例淋巴瘤多发,其余均为单发,共18个病灶.比较分析3种肿瘤的ADC值.结果:多形性腺瘤和腺淋巴瘤多发生于腮腺浅叶(43个,70.5％),肿瘤边界多清楚,体积一般较恶性肿瘤小;恶性肿瘤位于深叶者8个(44.4％),边界清楚或不清楚,多伴有颈部淋巴结肿大(10例,83.3％).多形性腺瘤及恶性肿瘤平均ADC值均高于腺淋巴瘤(P=0.000、0.002),且多形性腺瘤平均ADC值高于恶性肿瘤(P=0.001).结论:腮腺肿瘤的常规MRI征象具有一定特点,联合DWI能为腮腺常见肿瘤的诊断及鉴别诊断提供更多依据.     

腮腺多形性腺瘤和腺淋巴瘤的MSCT灌注成像研究

目的:探讨腮腺多形性腺瘤和腺淋巴瘤的MSCT灌注成像特征,以提高两者的诊断及鉴别诊断水平。方法:19例腮腺肿瘤患者术前行常规MSCT平扫后立即进行灌注扫描,采集数据输入Philips EBW后处理工作站,使用Perfusion软件进行数据处理,通过动态分析模块获得肿瘤感兴趣区时间-密度曲线(TDC),计算肿瘤血容量(BV)、达峰时间(TTP)和强化峰值(PEI),并根据色阶分别获取相应的伪彩图。所有患者最终均经手术病理学明确诊断。结果:1手术病理:19例腮腺肿瘤中,多形性腺瘤6例,腺淋巴瘤12例(其中2例因图像伪影明显不计入研究),腮腺癌1例(排除研究)。2MSCT灌注TDC特征:9例腺淋巴瘤呈"快进快退"型,1例呈"快进缓降"型,6例多形性腺瘤均呈"缓慢上升"型。3腺淋巴瘤的BV和PEI值均高于多形性腺瘤,而TTP值低于多形性腺瘤(P均<0.05)。4受试者工作特征(ROC)曲线显示BV和PEI值在多形性腺瘤和腺淋巴瘤间具有统计学差异,曲线下面积分别为0.93和0.97,而TTP值在两者间不存在统计学差异。结论:MSCT灌注成像在腮腺多形性腺瘤和腺淋巴瘤的诊断及鉴别诊断中具有重要价值。     

腮腺肿瘤的灌注成像:动脉自旋标记技术在鉴别腮腺沃辛瘤中的应用

正摘要目的前瞻性评估动脉自旋标记(ASL)与传统扩散加权(DW)成像对腮腺肿瘤的鉴别效能。方法包含10个多形性腺瘤,12个沃辛瘤和9个腮腺恶性肿瘤,所有肿瘤直径均10 mm,扫描序列包括T1W、T2W、DW及ASL。依据病理计算肿瘤与腮腺组织的信号强度比值(SIR)及肿瘤实质性成分的表观扩散系数(ADC)。结果在T2W影像中多形性腺瘤的SIR和ADC值均高于沃辛瘤(P0.01)和恶性肿瘤(P0.01),在ASL中,沃辛瘤的SIR值均高于多形性腺瘤(P0.01)和恶     

重T_2WI在腮腺肿瘤鉴别诊断中的应用价值

作者回顾分析43例腮腺肿瘤MR多序列影像,以评价它们在多形性腺瘤、Warthin瘤(腺淋巴瘤)及恶性腮腺肿瘤鉴别诊断中的应用价值。43例中男性21例,女性22例,平均年龄54.3岁(16～84岁)。其中良性病变32例,包括多形性腺瘤25例,Warthin瘤7例。恶性者11例,包括黏液表皮样癌5例,鳞状上皮     

重T2WI在腮腺肿瘤鉴别诊断中的应用价值[英]／Sakamoto M…／／Dentomaxillofac Radiol.

作者回顾分析43例腮腺肿瘤MR多序列影像，以评价它们在多形性腺瘤、Warthin瘤(腺淋巴瘤)及恶性腮腺肿瘤鉴别诊断中的应用价值。43例巾男性2l例。女性22例，平均年龄54．3岁(16—84岁)。其中良性病变32例。包括多形性腺瘤25例，Warthin瘤7例。恶性者11例，包括黏液表皮样癌5例，鳞状上皮细胞癌2例，多形性腺瘤癌变1例。表皮一黏液表皮细胞癌1例。黏膜淋巴组织淋巴瘤1例和基底细胞腺癌1例。     

双源CT对腮腺腺淋巴瘤及多形性腺瘤的诊断及鉴别诊断价值

目的 :探讨双源CT对腮腺腺淋巴瘤与多形性腺瘤的诊断及鉴别诊断价值。方法 :搜集33例,其中经手术、病理证实为腮腺腺淋巴瘤17例共22个病灶,腮腺多形性腺瘤16例共17个病灶,均完成双源CT平扫及增强扫描。结合病理,对其临床、影像资料进行分析和比较。结果:腮腺腺淋巴瘤与腮腺多形性腺瘤在发病部位、生长轴线、肿瘤内低密度或囊变坏死、平扫及增强扫描CT值、肿瘤内或周边血管影等方面差异均有统计学意义(均P0.05);在肿瘤形态、大小、左右叶分布方面差异均无统计学意义(均P0.05)。结论 :双源CT除能显示腮腺多形性腺瘤及腺淋巴瘤的数目、部位、形态及周围结构情况,尤其对肿瘤内低密度组织成分或囊变坏死、增强血管影等显示有较好优势,对两者具有较好的鉴别能力。     

腮腺多形性腺瘤与腺淋巴瘤的MSCT表现及病理对照分析

目的通过对腮腺多形性腺瘤与腺淋巴瘤的MSCT、病理对照分析提高MSCT对两者的诊断准确率。方法回顾性分析经病理证实的37例腮腺多形性腺瘤和32例腺淋巴瘤的MSCT影像学资料进行对比分析,结合临床病理资料,评价MSCT检查手段的诊断价值。结果多形性腺瘤多单发,腺淋巴瘤可多发;MSCT双期增强扫描多形性腺瘤呈延迟强化,腺淋巴瘤动脉期强化明显,延迟密度减低,符合其病理学基础;对鉴别多形性腺瘤与腺淋巴瘤有较高的价值。结论多形性腺瘤及腺淋巴瘤的MSCT影像学资料有一定的特征,MSCT对鉴别两者有重要的适用价值。     

T2-mapping鉴别诊断腮腺肿瘤的初步探索

【摘要】目的：评价T2-mapping成像在腮腺肿瘤鉴别诊断中的价值。方法：回顾性分析2018年6月-2021年7月经病理证实的168例腮腺肿瘤患者的T2-mapping资料,其中良性肿瘤118例,恶性肿瘤50例,并进一步分为多形性腺瘤（n=73）、Warthin瘤（n=29）、基底细胞腺瘤（n=11）和恶性肿瘤4组。测量肿瘤及对侧正常腮腺组织的T2值,计算相对T2（rT2）值,分析腮腺肿瘤T2值、rT2值的差异,运用受试者操作特征（ROC）曲线评价T2值、rT2值的诊断价值。结果：腮腺良性肿瘤的T2值、rT2值显著高于恶性肿瘤（P均<0.001）,多形性腺瘤的T2值及rT2值最高;Warthin瘤的T2值及rT2值最低。T2值、rT2值鉴别诊断腮腺良性与恶性肿瘤的曲线下面积（AUC）分别为0.715和0.692,T2值及rT2值鉴别诊断多形性腺瘤与Warthin瘤的AUC分别为0.891和0.862。T2值及rT2值鉴别诊断多形性腺瘤与基底细胞腺瘤的AUC分别为0.686和0.664。T2值及rT2值鉴别诊断多形性腺瘤与恶性肿瘤的AUC分别为0.836和0.799。T2值鉴别诊断Warthin瘤与基底细胞腺瘤的AUC为0.865。结论：T2-mapping有助于鉴别诊断腮腺肿瘤。     

MSCT双期增强扫描结合彩超对腮腺肿瘤的诊断价值

目的 研究多层螺旋CT(MSCT)双期增强扫描结合彩色多普勒血流显像(CDFI)对腮腺良恶性肿瘤的诊断价值.方法 分析手术病理证实的腮腺多形性腺瘤12例、腺淋巴瘤10例、缺乏恶性形态学CT表现特征的恶性肿瘤13例的术前MSCT双期增强扫描和CDFI影像资料,研究CT对腮腺肿瘤的诊断价值和限度以及CDFI诊断恶性肿瘤的阻力指数(RI)阈值,评价2种影像学手段相结合的诊断价值.结果 ①腺淋巴瘤与恶性肿瘤和良性多形性腺瘤的双期增强CT值均存在显著统计学差 异(P＜0.05),而后二者CT值差异无统计学意义(P＞0.05);②MSCT双期增强扫描对腺淋巴瘤的定性诊断敏感度和特异度极高(分别为90%和100%),对良性多形性腺瘤和恶性肿瘤的定性诊断敏感度、特异度较低(分别为60.00%、65.21%和46.15%、59.10%);以RI≥0.77作为CDFI诊断恶性肿瘤的阈值标准,诊断敏感度和特异度分别为92.30%、83.33%; ③采用MSCT双期增强扫描结合CDFI对恶性肿瘤的鉴别诊断敏感度、特异度分别为84.62%、100%.结论 MSCT双期增强扫描结合CDFI能弥补前者的不足,明显提高缺乏恶性形态学CT表现特征的腮腺恶性肿瘤的诊断准确度.     

Dynamic multislice computed tomography findings for parotid gland tumors

OBJECTIVE: Our aim was to research the enhancement features of parotid gland masses in detail and characterize if the masses were Warthin tumors, adenomas, or malignant tumors. METHODS: The prospective study included 25 parotid tumors in 21 patients. Neck computed tomography (CT) was performed using a multislice CT unit. A full-neck CT examination was done at 30 seconds after completion of contrast injection, and then tumor-level images were obtained at 90 seconds and at 5 and 25 minutes. Computed tomography number (lesion density in Hounsfield units) was determined at each phase, and differences within and among tumor groups were statistically analyzed. Diagnoses were confirmed by histopathology. RESULTS: There were 11 Warthin tumors, 8 pleomorphic adenomas, 5 malignant tumors, and 1 basal cell adenoma. Ten Warthin tumors showed rapid contrast enhancement at 30 seconds and rapid reduction of enhancement from the first to the fourth phase. The basal cell adenoma showed also a peak enhancement at 30 seconds. Seven pleomorphic adenomas showed increased enhancement through the first 3 phases. Four malignant tumors showed peak enhancement at 90 seconds. Statistically significant differences within and among tumor groups were determined. CONCLUSIONS: The data suggest that peak tumor enhancement at 30 and 90 seconds, respectively, might identify Warthin and malignant tumors. Increased enhancement through all phases might be an indicator for diagnosing pleomorphic adenomas.     

Value of apparent diffusion coefficient calculation in the differential diagnosis of parotid gland tumors

Background: The differential diagnosis of parotid gland tumors is often difficult with conventional magnetic resonance imaging.

Purpose: To determine whether the calculation of the apparent diffusion coefficient (ADC) is valuable for making the differential diagnosis of parotid tumors.

Material and Methods: Thirty parotid masses in 28 patients and 24 healthy parotid glands in 12 controls were examined in this prospective study. Diffusion-weighted magnetic resonance imaging with echo-planar spin-echo sequences was used to evaluate each subject. The ADC of each tumor and each healthy parotid gland was calculated. Tumor diagnoses were confirmed by the results of histopathologic analysis.

Results: The following types of masses were identified: 11 Warthin tumors, nine pleomorphic adenomas, seven malignant tumors, one basal cell adenoma, and two benign cysts. The mean ADC value for the Warthin tumors was 0.97±0.16×10^-3 mm²/s, for the pleomorphic adenomas was 1.74±0.37×10^-3 mm²/s, for the malignant tumors was 1.04±0.35×10^-3 mm²/s, and for the normal parotid glands was 0.34±0.20×10^-3 mm²/s. The respective ADC value for the single basal cell adenoma was 1.40×10^-3 mm²/s. Statistically significant differences were identified between the subjects with pleomorphic adenoma and those with another type of parotid tumor, and between subjects with healthy parotid glands and those with a tumor.

Conclusion: Calculating the ADC appears to be useful in differentiating pleomorphic adenomas from other types of parotid gland tumors.     

Diagnostic value of FDG PET and salivary gland scintigraphy for parotid tumors

PURPOSE: The purpose of this study was to examine the diagnostic value of the combination of F-18 fluorodeoxyglucose (FDG) PET and Tc-99m pertechnetate salivary gland scintigraphy in parotid tumors. MATERIALS AND METHODS: Seventy-two patients with benign parotid gland tumors (n = 52), malignant parotid tumors (n = 12), and inflammation (n = 8) underwent both FDG PET and salivary gland scintigraphy within 1 week, and 66 of the patients also underwent gallium scintigraphy. All patients were negative on their first fine-needle aspiration (FNA). RESULTS: Malignant parotid tumors showed significantly higher FDG uptake (standard uptake values [SUVs]) than both benign tumors and inflammation, except in Warthin's tumor (5.82 +/- 3.95 vs. 2.07 +/- 1.33; P <0.01). Although the SUV values of Warthin's tumor and malignant parotid tumors overlapped somewhat, Warthin's tumor did demonstrate increased radiotracer uptake, and it was reliably distinguished from other parotid gland tumors by the use of salivary gland scintigraphy. Considering a SUV value >3 as being positive for malignancy and excluding Warthin's tumor on the basis of salivary gland scintigraphy, sensitivity and specificity of FDG PET were 75% and 80%, respectively. These results were superior to those of gallium scintigraphy (58% and 72%, respectively). CONCLUSIONS: Although the diagnostic value of FDG PET in the differentiation of malignant from benign parotid gland tumors was limited because of the high FDG uptake in some benign tumors, and particularly pleomorphic adenomas, combining salivary gland scintigraphy with FDG PET may help to negate this drawback, and this combination may be a more promising approach for differentiation of various parotid gland tumors in patients compared with nondiagnostic needle aspiration.     

Salivary gland tumors: evaluation with two-phase helical CT

PURPOSE: To evaluate two-phase helical computed tomography (CT) in the characterization of salivary gland tumors. MATERIALS AND METHODS: Sixty-four patients with major salivary gland tumors underwent two-phase helical CT. The histopathologic diagnosis was obtained by means of surgical resection or biopsy in all patients. After the injection of 90 mL of contrast material at a rate of 3 mL/sec, helical CT scans were obtained at early and delayed phases with scanning delays of 30 and 120 seconds, respectively. The attenuation change and enhancement patterns in the tumors were assessed. The attenuation change in the tumor also was assessed quantitatively as the ratio of the CT number (in Hounsfield units) at delayed phase scanning to that at early phase scanning. RESULTS: There were 35 pleomorphic adenomas, nine Warthin tumors, and 20 malignant tumors. Two-phase helical CT showed increase in attenuation in 30 (86%) pleomorphic adenomas, decrease in eight (89%) Warthin tumors, and increase in 11 (55%) and no change in eight (40%) malignant tumors at delayed phase scanning. A multinodular enhancement pattern was found in only 12 (34%) pleomorphic adenomas. The ratio of CT numbers was significantly different between Warthin tumors and pleomorphic adenomas and between Warthin tumors and malignant tumors. CONCLUSION: The analysis of enhancement patterns by using two-phase helical CT will be helpful in the differential diagnosis of salivary gland tumors.     

磁共振波谱及扩散加权成像在唾液腺肿瘤诊断中的价值

目的 回顾性分析、评价氢质子磁共振波谱(~1H-MRS)及扩散加权成像(DWI)在鉴别唾液腺良性或恶性肿瘤中的价值.资料与方法 应用1.5 TMR成像仪,对39例唾液腺肿瘤患者进行常规MRI、DWI及~1H-MRS检查,(1)DWI采用单次激发自旋回波一回波平面成像(SE-EPI)序列,扩散敏感系数(b值)为0 s/mm~2及1000 s/mm~2,并计算每例患者平均表观扩散系数(ADC)值和高、中、低ADC值所占的比例,(2)~1H-MRS采用单体素点分辨表面线圈(PRESS)序列,TR 1500 ms,TE 136 ms,在谱线中计算胆碱与肌酸的比值(Cho/Cr).最后与肿瘤的组织病理学结果进行对比,进行非参数秩和检验.结果 39例唾液腺肿瘤患者均获得了满意的检查结果,其中良性肿瘤31例(混合瘤21例,腺淋巴瘤10例),恶性肿瘤8例(腺囊腺癌3例、黏液表皮样癌3例、混合腺癌1例、恶性淋巴瘤1例).(1)DWI:ADC图提示良性肿瘤与恶性肿瘤的平均ADC值分别为(1.65±0.41)×10~(-3)mm~2/s和(1.15±0.39)×10~(-3) mm~2/s,其间无明显差异,但良性肿瘤ADC值增高的区域则明显多于恶性肿瘤,尤其是混合瘤.(2)~1H-MRS:在TE为136 ms时共获得满意的波谱曲线35例,计算得出恶性肿瘤、腺淋巴瘤、混合瘤的Cho/Cr分别为1.69±0.51、5.89±1.42、2.81±0.72,恶性肿瘤、腺淋巴瘤、混合瘤之间均存在显著差异.结论 DWI及~1H-MRS可以作为鉴别唾液腺肿瘤的特异性检查手段,但仍需要大量研究样本来进行验证.     

Salivary gland tumors at in vivo proton MR spectroscopy

PURPOSE: To prospectively evaluate whether proton magnetic resonance (MR) spectroscopy can be used to characterize salivary gland tumors (SGTs). MATERIALS AND METHODS: Ethics committee approval and informed consent were obtained. Hydrogen 1 ((1)H) MR spectroscopy was performed with echo times of 136 and 272 msec at 1.5 T in both SGTs and normal parotid glands. Spectra were analyzed in the time domain by using prior knowledge in the fitting procedure to obtain peak amplitudes of choline (Cho), creatine (Cr), and unsuppressed water. Mean Cho/Cr and Cho/water ratios for each subgroup of SGTs were obtained, and results were compared by using a nonparametric t test. RESULTS: Successful spectra were acquired in 56 patients (35 men, 21 women; mean age, 56 years) with a total of nine malignant tumors and 47 benign SGTs (24 Warthin tumors, 22 pleomorphic adenomas, one oncocytoma). At an echo time of 136 msec, Cho/Cr ratios were obtained in 26 (47%) of 55 spectra, with a mean value (+/- standard deviation) of 1.73 +/- 0.47, 5.49 +/- 1.86, 3.46 +/- 0.84, and 2.45 for malignant tumors, Warthin tumors, pleomorphic adenomas, and oncocytoma, respectively. Differences were significant between Warthin tumors and pleomorphic adenomas (P = .028) and between benign SGTs and malignant tumors (P < .001). At an echo time of 272 msec, Cho/Cr ratios were obtained in 16 (30%) of 53 spectra, with a mean value of 2.27 +/- 0.69, 6.92 +/- 1.47, and 3.67 +/- 1.23 for malignant tumors, Warthin tumors, and pleomorphic adenomas, respectively. Differences were also significant between Warthin tumors and pleomorphic adenomas (P = .041) and benign SGTs and malignant tumors (P = .004). There was a significant difference in mean Cho/water ratio for Warthin tumors versus pleomorphic adenomas at echo times of 136 msec (P = .003) and 272 msec (P = .002) but not for benign SGTs versus malignant tumors. CONCLUSION: (1)H MR spectroscopy may be used to characterize SGTs, but a larger study is required to validate these initial results.     

Diagnostic performance of qualitative and radiomics approach to parotid gland tumors: which is the added benefit of texture analysis?

Objective:To investigate whether MRI-based texture analysis improves diagnostic performance for the diagnosis of parotid gland tumors compared to conventional radiological approach.Methods:Patients with parotid gland tumors who underwent salivary glands MRI between 2008 and 2019 were retrospectively selected. MRI analysis included a qualitative assessment by two radiologists (one of which subspecialized on head and neck imaging), and texture analysis on various sequences. Diagnostic performances including sensitivity, specificity, and area under the receiver operating characteristic curve (AUROC) of qualitative features, radiologists’ diagnosis, and radiomic models were evaluated.Results:Final study cohort included 57 patients with 74 tumors (27 pleomorphic adenomas, 40 Warthin tumors, 8 malignant tumors). Sensitivity, specificity, and AUROC for the diagnosis of malignancy were 75%, 97% and 0.860 for non-subspecialized radiologist, 100%, 94% and 0.970 for subspecialized radiologist and 57.2%, 93.4%, and 0.927 using a MRI radiomics model obtained combining texture analysis on various MRI sequences. Sensitivity, specificity, and AUROC for the differential diagnosis between pleomorphic adenoma and Warthin tumors were 81.5%, 70%, and 0.757 for non-subspecialized radiologist, 81.5%, 95% and 0.882 for subspecialized radiologist and 70.8%, 82.5%, and 0.808 using a MRI radiomics model based on texture analysis of T₂ weighted sequence. A combined radiomics model obtained with all MRI sequences yielded a sensitivity of 91.5% for the diagnosis of pleomorphic adenoma.Conclusion:MRI qualitative radiologist assessment outperforms radiomic analysis for the diagnosis of malignancy. MRI predictive radiomics models improves the diagnostic performance of non-subspecialized radiologist for the differential diagnosis between pleomorphic adenoma and Warthin tumor, achieving similar performance to the subspecialized radiologist.Advances in knowledge:Radiologists outperform radiomic analysis for the diagnosis of malignant parotid gland tumors, with some MRI qualitative features such as ill-defined margins, perineural spread, invasion of adjacent structures and enlarged lymph nodes being highly specific for malignancy. A radiomic model based on texture analysis of T₂ weighted images yields higher specificity for the diagnosis of pleomorphic adenoma compared to a radiologist non-subspecialized in head and neck radiology, thus minimizing false-positive pleomorphic adenoma diagnosis rate and reducing unnecessary surgical complications.     

腮腺多形性腺瘤与沃辛瘤MRI表现对照分析

目的:探讨磁共振成像检查对腮腺多形性腺瘤与沃辛瘤的鉴别诊断价值。方法:回顾分析经病理证实的8例腮腺多形性腺瘤及10例腮腺沃辛瘤的磁共振成像检查表现,并作统计学处理。结果:腮腺多形性腺瘤为单侧腮腺单发病灶(8/8),沃辛瘤可单侧单发(5/10),亦可双侧或多发(5/10)(P<0.05);沃辛瘤多位于腮腺浅叶(13/17),腮腺多形性腺瘤可位于浅叶(6/8),亦可位于深叶或占据深浅叶(2/8)(P<0.05);多形性腺瘤在T2WI中以高信号多见(5/8),沃辛瘤以等信号或低信号为主(17/17)(P<0.05);性别分布上腮腺多形性腺瘤女性多见(6/8),沃辛瘤男性多见(7/10)(P<0.05);年龄分布上沃辛瘤为50岁以上者多见(6/10),多形性腺瘤中50岁以上与50岁以下者分布相近,各为4例(P<0.01)。结论:磁共振成像检查的特征表现和临床资料相结合对腮腺多形性腺瘤与沃辛瘤可正确诊断。     

The diagnostic efficacy of apparent diffusion coefficient value and Choline/Creatine ratio in differentiation between parotid gland tumors

Objective

To detect the diagnostic performance of apparent diffusion coefficient (ADC) value and Cho/Cr ratio in distinguishing various pathological subtypes of parotid gland tumors.