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期刊信息

创刊日期：1990年
主管单位：中国人民共和国卫生部
主办单位：中国医学影像技术研究会
　　　　　中国医科大学
承办单位：中国医科大学附属盛京医院
　　　　　辽宁省医学影像学会
编辑出版：《中国临床医学影像杂志》
　　　　　编辑部
刊　　期：月刊

2017 Vol. 28, No. 7 Published: 2017-07-20

	457	Study of changes of hippocampal metabolite concentrations in patients with temporal lobe epilepsy using 1H-MRS
		AN Yang1, SUN Hai-zhen1, NI Hong-yan2, YIN Jian-zhong2
		Objective: To measure the changes of bilateral hippocampal metabolite concentrations in patients with temporal lobe epilepsy(TLE) by using proton magnetic resonance spectroscopy(1H-MRS). The main metabolites that we studied include N-acetylaspartate(NAA), γ-aminobutyric acid(GABA) and glutamate/glutamine compounds(GLx). These changes of the metabolite concentrations can make us further understand the pathogenesis of epilepsy, and provide more imaging support for locating the epileptic foci in TLE. Methods: Ten patients with TLE and 14 normal controls were studied. All subjects underwent bilateral hippocampal conventional MRI and 1H-MRS scans. The metabolite concentrations of NAA, Cr, Cho, GABA and GLx in the ipsilateral hippocampus were compared with the concentrations in the contralateral hippocampus and the normal control group. Results: NAA was significantly lower in the ipsilateral hippocampus than in the contralateral hippocampus and normal control group(P=0.001, P=0.007, respectively). By partial correlation analysis with the controlling factors of age, GLx and NAA were negatively correlated(P=0.016), and GABA and GLx are negatively correlated(P=0.024) in the ipsilateral hippocampus. Conclusion: NAA reduced in ipsilateral hippocampus in patients with temporal lobe epilepsy, which can provide the basis for the localization of epileptic foci. GABA and GLx in ipsilateral hippocampus have different changes compared with the normal control group with a negative correlation in metabolic changes, the local variations may be related with seizure and treatment status of epilepsy.
		2017 Vol. 28 (7): 457-461 [Abstract] ( 981 ) HTML (1 KB) PDF (0 KB) ( 142 )

	462	Application value of CT perfusion-derived arteriograms in cranial arteriovenous shunting lesions
		GENG Yue1, ZENG Meng-su2, WANG Jian2
		Objective: To explore the clinical application value of CT perfusion-derived arteriograms(CTPa) in cranial arteriovenous shunting lesions. Methods: Twenty-six cases, diagnosed of cranial arteriovenous shunting lesions by CTPa were included in this retrospective study. The location, size and angioarchitecture of the lesions were analyzed from the CTPa images. Using DSA images as the gold standard, the diagnostic and following-up accuracy of CTPa were evaluated in 17 cases. Results: There were 18 arteriovenous malformation cases and 8 arteriovenous fistula cases. CTPa could clearly show the angioarchitecture details of the lesions, including location, feeding arteries, draining veins and dynamic blood flow information. The diagnostic results of CTPa in 17 cases were consistent with those of DSA, but CTPa missed 1(1/21) feeding artery and 3(3/23) draining veins in three cases. Conclusion: Although some fine angioarchitectural details were missed when compared to DSA, CTPa was sufficiently accurate to diagnose the shunt. CTPa can be a valuable adjunct in the diagnosis of cranial arteriovenous shunting lesions.
		2017 Vol. 28 (7): 462-465 [Abstract] ( 1146 ) HTML (1 KB) PDF (0 KB) ( 143 )

	466	Retrospective analysis of clinical significance of dynamic changes of cerebral hemodynamics and#br# S-NSE in full term neonates with asphyxia
		WANG Shi-jie, LI Cao, LI Ming-xing
		Objective: To investigate the clinical significance of dynamic changes of cerebral hemodynamics and serum neuron specific enolase(S-NSE) in full term neonates with asphyxia. Methods: Color Doppler ultrasound was applied to monitor the changes of peak systolic velocity(PSV), end diastolic velocity(EDV) and resistance index(RI) of the middle cerebral artery(MCA) at the 1, 3 and 7 days in 43 cases of asphyxiated full term neonates(asphyxia group) and 10 cases of full-term normal neonates(control group). Moreover, the serum NSE at the 1, 3 and 7 days in the asphyxia group and the 1 day in the control group were available. In strict accordance to the neonatal hypoxic ischemic encephalopathy(HIE) clinical diagnosis and grading standard made in 2000 by the neonatal study group of Chinese Medical Association, the newborns in the asphyxia group were divided into non-HIE group, mild HIE group, moderate HIE group and severe HIE group. Retrospective analysis was performed on cerebral hemodynamic parameters and S-NSE values between each group. Results: Compared with the control group, the asphyxia group showed decreased PSV and EDV, and increased RI with the deterioration of HIE degrees. After treatment, the three parameters became bettered when HIE was less severe, the recovery was more rapid. S-NSE value increased significantly with deterioration of HIE degrees. After treatment, S-NSE value gradually decreased when HIE was less severe, the decrease was more rapid. The areas under the curve(AUC) of RI and S-NSE were 0.768 and 0.874. The sensitivity was 58.1% and 73.5%, and the specificity was 93.6% and 90.5%, respectively. RI and S-NSE showed low positive correlation with a correlation coefficient of 0.354. Conclusion: Dynamic detection of neonatal cerebral hemodynamics and S-NSE value is important for early diagnosis, grading and prognosis estimation of HIE. This combination can improve the accuracy of HIE diagnosis.
		2017 Vol. 28 (7): 466-470 [Abstract] ( 885 ) HTML (1 KB) PDF (0 KB) ( 135 )

	471	The relationship between first pre-ablation sTg levels and metastasis in#br# postoperative patients with differentiated thyroid carcinoma
		LIU Yong, CHEN Peng, SONG Chang-xiang, LU Wu, DU Peng
		Objective: To investigate the relationship between first pre-ablation stimulated thyroglobulin(sTg) and sTg/thyrotropin(TSH) levels and metastasis in postoperative patients with differentiated thyroid carcinoma(DTC). Methods: The study included 106 patients with DTC who had undergone total thyroidectomy and lymphadenectomy. The pre-ablation sTg and TSH of 106 patients were measured one day before first 131I ablation therapy, and the patients undergone 131I-SPECT/CT on 5～7 days after 131I ablation therapy. Patients were divided into two groups as M0 group and M1 group according to the presence and absence of metastases, respectively. The sTg and sTg/TSH value between M0 and M1 were compared by Mann-Whitney rank-sun test. The ROC curves and diagnostic critical point(DCP) were analyzed to evaluate the predictive values of sTg and sTg/TSH. Results: The pre-ablation sTg and sTg/TSH of M1 were significantly higher than those of M0(U=242.50, P=0.000; U=237.50, P=0.000). Areas under the ROC curve for sTg and sTg/TSH was 0.913 and 0.914. The cut-off values of DCP of sTg and sTg/TSH were 40.60 ng/mL with a sensitivity of 70.21%, specificity of 100%, accuracy of 86.79%, and 0.24 ng/U with a sensitivity, of 80.85%, specificity of 84.92%, accuracy of 88.68%. Conclusion: The pre-ablation sTg and sTg/TSH may be a useful diagnostic marker for predicting metastases before the first 131I ablation therapy.
		2017 Vol. 28 (7): 471-474 [Abstract] ( 988 ) HTML (1 KB) PDF (0 KB) ( 133 )

	475	A preliminary study of diagnosing lung neoplasms with quantitative analysis of DCE-MRI
		SHI Zhao-fei, LIU Xu-zhong, BO Gen-ji
		Objective: To investigate the feasibility of quantitative analysis parameters of dynamic contrast-enhanced MRI (DCE-MRI) in diagnosis of lung neoplasms and assess the differences of quantitative MR pharmacokinetic parameters volume transfer constant(Ktrans), exchange rate constant(Kep) and extravascular extracellular volume fraction(ve) in lung neoplasms. Methods: Three Tesla MR examinations were performed in 77 patients confirmed by biopsy and the quantitative MR pharmaeokinetic parameters including Ktrans, Kep and ve were obtained. Independent two sample t test was used between benign and malignant lung lesions. Finally, the areas under the ROC curve(AUC) of Ktrans, Kep and ve between malignant and benign lesions were compared. Results: The mean Ktrans, Kep and ve of poorly differentiated adenocarcinoma(n=26) were(0.270±0.089) min-1, (0.926±0.475) min-1 and (0.340±0.144). The mean Ktrans, Kep and ve of poorly differentiated squamous cell carcinoma(n=13) were (0.268±0.066) min-1, (0.997±0.464) min-1 and (0.293±0.091). The mean Ktrans, Kep and ve of small-cell lung cancer were (0.238±0.074) min-1, (0.617±0.369) min-1 and (0.412±0.312). The mean Ktrans, Kep and ve of benign lesions(n=24) were (0.190±0.084) min-1, (0.569±0.271) min-1 and (0.392±0.207). There was significant difference between malignant and benign lesions in either Ktrans or Kep(t=3.697, 3.883, respectively, P<0.05). There was no significant difference between malignant and benign lesions in ve(t=1.341, P＞0.05). Ktrans and Kep values of benign lesions were significantly lower than those of squamous cell carcinoma and adenocarcinoma(both P＜0.05). No significant difference was observed between squamous cell carcinoma and adenocarcinoma in Ktrans or Kep(both P＞0.05). The AUCs of Ktrans and Kep between malignant and benign lesions were 0.741 and 0.715. The sensitivity of Ktrans and Kep were 88.4％ and 39.5％, and the specificity of Ktrans and Kep were 54.2％ and 95.8％. Conclusion: The differential diagnosis of benign and malignant lung lesions by Ktrans and Kep is applicable.
		2017 Vol. 28 (7): 475-479 [Abstract] ( 915 ) HTML (1 KB) PDF (0 KB) ( 239 )

	480	Study of the biodistribution and imaging of 99Tcm-MAG3-isoDGR-2C in tumor bearing mice
		XIE Peng, HUANG Jian-min, LIU Xiao-mei, WEI Ling-ge
		Objective: To study the feasibility of using labeled MAG3-isoDGR-2C with 99Tcm as a potential molecular imaging agent for ανβ3 targeting. Method: The MAG3-isoDGR-2C was labeled with 99Tcm using glucoheptonate transformation and complexation. S180 tumor bearing mice were divided into 5 groups with 5 mice each. At 30 min, 60 min, 120 min, 240 min and 360 min after the injection of 99Tcm-MAG3-isoDGR-2C, the mice were sacrificed by decapitating. The biodistribution in the organs, T/B and T/M was calculated. SPECT imaging was performed at different time points after injection in 5 tumor bearing mice, and the ratio of T/NT were calculated by using ROI. Results: The MAG3-isoDGR-2C was labeled with 99Tcm effectively and simply, and the radiation chemical purity could reach to 94.34% without purification. The biodistribution showed the tracer was cleared rapidly from blood and was mainly excreted through kidney. The radioactive uptake in heart, lung, spleen, stomach and bone was low, and the uptake in tumor could be visualized. The maximum ratios of T/B and T/NT were 1.75 and 10.50 respectively in the time of 4 hours after injection of the tracers. The SPECT images demonstrated the increased activity in the region of tumor with the maximum T/NT of 3.24±1.71. Conclusion: 99Tcm-MAG3-isoDGR-2C can be made easily and show certain targeting ability to the malignant process, which proves its potentiality to become a new molecular imaging agent.
		2017 Vol. 28 (7): 480-483 [Abstract] ( 870 ) HTML (1 KB) PDF (0 KB) ( 143 )

	484	The values of MR perfusion weighted imaging in evaluating rabbit liver fibrosis
		HAN Bing-yan, WANG Hao, WANG Yun-ling, WANG Lu-wei, WANG Hong, JIA Wen-xiao
		Objective: To evaluate the diagnostic value of MR perfusion weighted imaging(PWI) for liver fibrosis in rabbit model. Methods: MR PWI was performed in the experimental group(n=40) and the control group(n=10). Time to peak(TP), wash-in rate and wash-out rate were compared with histological results by using one-way ANOVA Least significant difference(LSD) was used between two groups. The diagnostic efficiency of staging liver fibrosis was done by using ROC curve analysis. Results: With the deterioration of liver fibrosis, time to peak(TP) of liver parenchyma increased gradually, however, the wash-in rate and wash-out rate decreased. For TP, there was signifcant difference among stage S0~S2, S3 and S4(P<0.05). For wash-in rate, there was signifcant difference among stage S0 and S2, S3 and S4(P<0.05). Concerning wash-out rate, S3 and S4 stage can be distinguished from S0~S2 stage(P<0.05). After merging fibrosis stages, there was signifcant difference among stage S0 and ≥S1, ≤S1 and ≥S2, ≤S2 and ≥S3, ≤S3 and S4(P<0.05). Conclusion: Combining the TP and the signal rise maximum slope rate can reflect perfusion changes of liver fibrosis in different periods with highest diagnostic efficiency in stages over S2.
		2017 Vol. 28 (7): 484-487 [Abstract] ( 740 ) HTML (1 KB) PDF (0 KB) ( 135 )

	488	The value of ARFI in assessing the therapeutic response 24 h after RFA in HCC
		ZHOU Ling-hui, HE Yun, YANG Hong, LU Jing-ning, PENG Jin-bo,
		Objective: To explore the role of acoustic radiation force impulse(ARFI) in assessing the therapeutic response 24 h after radiofrequency ablation(RFA) in hepatocellular carcinoma(HCC). Materials and Methods: A total of 22 patients with 23 HCC lesions who received RFA in our hospital from December 2015 to June 2016 were enrolled. All the patients were examined with base-line ultrasound(BUS), contrast enhanced ultrasound(CEUS) and ARFI one day before RFA, 24 h after RFA and one month after RFA, respectively. The change of ablation area stiffness was measured by virtual touch tissue quantification(VTQ). The ablation lesion area was measured by BUS, virtual touch tissue imaging(VTI) and CEUS. The area of ablation lesions measured by the three methods were compared. Results: Twenty-three tumors showed low-echo on VTI 24 h after RFA and one month after RFA, which were easily detected. The extent of ablation area was enlarged compared to preoperative. After 24 h of RFA procedure, the VTQ value of the internal and marginal ablation lesion area was higher than preoperative(all P<0.01), respectively, but there was no statistically significant difference for one month after RFA(P=0.46, P=0.50). The value of VTQ in peripheral parts of the primary tumor did not change significantly at one week before RFA, 24 h after RFA or one month after RFA(all P>0.05). The ablation lesion areas 24 h after RFA and one month after RFA measured by VTI and CEUS were larger than that by BUS(all P<0.01). However, there was no statistically significant difference of ablation lesion area between VTI and CEUS(P=0.88, P=0.49). Conclusion: ARFI, as a non-invasive, effective and feasible method, can accurately measure the ablation area and provide the change of lesion stiffness immediately after RFA of HCC.
		2017 Vol. 28 (7): 488-491 [Abstract] ( 650 ) HTML (1 KB) PDF (0 KB) ( 141 )

	492	The filling state and contraction rate of the gallbladder in preterm neonates using#br# a high-frequency transducer
		JU Hao, JI Chao, LI Shi-xing, FENG Shu, QIAO Wei
		Objective: To determine the volume of the gallbladder after fasting and postprandial in preterm neonates using a high-frequency transducer, and to discuss the fasting filling state and contraction rate of the gallbladder in preterm neonates. Methods: Terason t3000 color Doppler ultrasound diagnostic apparatus was used to examine the gallbladder after fasting and postprandial and to calculate the volume and contraction rate of the gallbladder. Results: ①The average volume of the gallbladder after fasting in 67 preterm neonates was 0.086 mL(0.028, 0.186), which was significantly smaller than that in 42 term neonates which was 0.292 mL(0.102, 0.671), P<0.05. ②Poor contraction in preterm neonates(16/46, 34.8%) was significantly higher than that in term neonates(5/36, 13.9%), χ2=4.628，P<0.05. Conclusion: The gallbladder volume in preterm neonates after fasting was smaller than that in term neonates, and was combined with poor contraction in some cases, suggesting that the size and function of the gallbladder in preterm neonates was not yet well developed, and needed to be carefully distinguished from biliary atresia.
		2017 Vol. 28 (7): 492-495 [Abstract] ( 832 ) HTML (1 KB) PDF (0 KB) ( 123 )

	496	A retrospective study on CT imaging features of severe hyperplasia of intraductal papillary mucinous neoplasms
		ZHU Xiang, HUA Xiao, WU Fan
		Objective: To explore CT imaging features of severe dysplasia of pancreatic intraductal papillary mucinous neoplasms(IPMN). Materials and Methods: As a retrospective study, the clinical, pathological and CT imaging data of 39 IPMN patients were collected and analyzed. CT imaging features of severe dysplasia were compared with slight to moderate dysplasia and invasive carcinoma. Results: CT features of severe dysplasia IPMN was partly similar with invasive carcinoma, suggesting it has a certain malignant tendency(cystic wall thickening, wall nodule, cystic wall and nodular enhancement). Meanwhile, it was partly similar to slight to moderate dysplasia IPMN, suggesting it has a certain benign tendency(less frequent occurence of peripancreatic haziness and enlarged lymph nodes). Conclusion: Severe dysplasia IPMN have certain CT imaging characteristics between those of slight to moderate dysplasia and invasive carcinoma. Therefore, more attention needed for severe dysplasia IPMN in clinics.
		2017 Vol. 28 (7): 496-499 [Abstract] ( 876 ) HTML (1 KB) PDF (0 KB) ( 163 )

	500	Clinical characteristics and imaging misdiagnosis analysis of duodenal heterotopic pancreas
		XIA Zhen-yuan, LI Wei-xiong, HE Hua, DONG Xin
		Objective: To analyze the clinical characteristics and CT findings of heterotopic pancreas in duodenum. Methods: The clinical and imaging data of 10 patients with heterotopic pancreas in duodenum were reviewed retrospectively,which were confirmed by pathology but misdiagnosed by imaging. Clinical manifestations, morphological characteristics, the ratio range between longitudinal diameter(LD) and short diameter(SD) and the differences in CT values between normal pancreas and the lesions were analyzed. Results: Main clinical manifestations in these patients were as follows: recurrent abdominal pain and distension in 5 cases, melena in 3 cases and jaundice in 2 cases. In terms of imaging findings, two lesions were not shown on CT which were located in duodenal papilla or Vater ampulla, and eight cases showed nodular lesions which were all above Vater ampulla. Six cases were Yamada type Ⅱ, seven cases were intracavitary, five cases showed clear margin and homogeneous density. The LD/SD values in eight cases were from 1.14 to 1.92, which was 1.52±0.24 in an average, LD/SD were above 1.4 in 5 cases. In the plain phase and the portal vein phase, CT values of the lesions were slightly lower than normal pancreas(t=-3.41, -1.00, P＜0.05), the mean differences were only (6.38±2.45) HU and (5.25±3.33) HU respectively, which were indistinguishable to naked eyes. In the aspect of misdiagnoses, four cases were misdiagnosed as leiomyomas or inflammatory polyps, four cases as gastrointestinal stromal tumors(GIST), two cases as periampullary carcinomas. Conclusion: The imaging findings of heterotopic pancreas in duodenum are nodules with broad base, intracavitary distribution, clear margin, homogeneous density and the similar characteristics of enhancement to normal pancreas. However, atypical imaging findings may lead to misdiagnosis. Further understanding of the disease as well as fully combining with clinical features are of vital importance for diagnosis.
		2017 Vol. 28 (7): 500-503 [Abstract] ( 870 ) HTML (1 KB) PDF (0 KB) ( 130 )

	504	Clinical application of high-resolution 3.0T MRI in preoperative staging of rectal cancer
		YU Wen-qian1, CHANG Hong2, LI Hai-ling1, SHI Yu-zhu1, WANG Chun-li1,
		Objective: To investigate the diagnostic value of high resolution 3.0T MRI conventional scan, DWI and DCE MR imaging in TNM staging of rectal cancer. Methods: Twenty-six male and thirty female patients(49~78 years old) with pathologically confirmed rectal cancer were enrolled between January 2013 to May 2016. The imaging sequences included plain sagittal T2WI, axial T2WI, T1WI, DWI, coronary T2WI, fat-suppressed axial and coronal T2WI, axial, sagittal and coronal sequences of T1WI were dynamically enhanced. The image quality of each sequence is evaluated. The results of preoperative MRI staging were compared with the results of postoperative pathological staging. Results: High-resolution MRI in 50 of 56 cases of rectal cancer showed correct T stage. Among the rest 6 cases, two cases of pathologically T1 and T3 were preoperatively misdiagnosed to be T2 respectively. Two cases of T2 were preopreatively misdiagnosed T1. The total coincidence rate was 89.2%(50/56). The coincidence rate of T1 stage was 75%(6/8). The coincidence rate of T2 stage was 91%(20/22). The coincidence rate of T3 stage was 91%(20/22). The coincidence rate of T4 stage was 100%(4/4). The accuracy of MRI in the diagnosis of total T stage were 89.2%(50/56), and the sensitivity and accuracy of combining each sequence in the diagnosis of rectal cancer were superior to that of routine sequence. The time-signal intensity curve of rectal cancer showed an outflow pattern. Dynamic contrast-enhanced scan was superior to other sequences in the detection of rectal cancer and invasion of the surrounding wall. Conclusion: The ideal combination of 3.0T MRI imaging sequences for rectal cancer consists of sagittal T2WI, axial T2WI, T1WI, DWI(b value of 1 000 s/mm2), coronary T2WI and axial, sagittal and coronary enhanced scan, which can be used for preoperative staging of rectal cancer.
		2017 Vol. 28 (7): 504-506 [Abstract] ( 808 ) HTML (1 KB) PDF (0 KB) ( 133 )

	507	MDCT evaluation of the Fuhrman grade of clear cell renal cell carcinoma
		LIU Ying-ying1, ZHANG Xue-ning1, HOU Wen-jing2
		Objective: To investigate the relationship between MDCT findings and Fuhrman grade of clear cell renal cell carcinoma(ccRCC). Materials and Methods: A retrospective analysis of MDCT manifestations of 113 patients with pathologically confirmed ccRCC, including 8 cases of Fuhrman grade Ⅰ, 60 cases of Fuhrman grade Ⅱ, 30 cases of Fuhrman grade Ⅲ and 15 cases of Fuhrman grade Ⅳ. The tumor characteristics, including tumor size, cystic versus solid, calcification, heterogeneity of lesions, percentage of non-enhancing necrotic ratio and growth pattern were noted independently by two radiologists, and statistical analysis was performed. Results: Fourteen of fifteen(93.3%) cystic ccRCC were low grade(Fuhrman grades Ⅰ~Ⅱ). In predominantly solid ccRCC, twenty of twenty-seven(74%) infiltrative ccRCC were high grade(Fuhrman grades Ⅲ~Ⅳ). Univariate analysis showed that larger tumor size(critical value 4 cm) had higher grade(χ2=11.441, P<0.001); calcification and necrotic ratio ≥0.6 were significantly more common in high grade ccRCC than in low grade ccRCC(χ2=29.007, P<0.001; χ2=18.454, P=0.030). Multivariate analysis showed tumor size, infiltrative growth and necrotic ratio ≥0.6 were Fuhrman grades Ⅲ~Ⅳ of three independent predictors(OR: 0.122, P=0.002; OR: 13.234, P=0.002; OR: 12.891, P=0.031). Conclusion: Multi-detector CT shows great application value in distinguishing Fuhrman grading system of ccRCC. Cystic ccRCC tends to have low grade. Infiltrative growth, larger tumor size and necrotic ratio ≥0.6 may increase the likelihood of high grade predominantly solid ccRCC.
		2017 Vol. 28 (7): 507-511 [Abstract] ( 707 ) HTML (1 KB) PDF (0 KB) ( 140 )

	513	Preliminary study of the correlation between the area of anal levator hiatus and pelvic floor dysfunction
		ZHANG Hong-bin, LI He-zhou
		Objective: To obtain the cut-off value of the area of the pelvic diaphragmatic hiatus and analyze the correlation between the area and the severity degree of patients with pelvic organ prolapse(POP) and stress urinary incontinence(SUI). Methods: One hundred and seventy-eight women diagnosed with pelvic floor dysfunction were examined by real-time three-dimensional ultrasound of the perineum. The area of the pelvic diaphragmatic hiatus was measured, and the correlations of the area and the severity degree between POP and SUI were analyzed. Results: The cut-off area of the pelvic diaphragmatic hiatus in patients with POP was 25.5 cm2. Meanwhile, the correlation values between the severity degree of POP and SUI were 0.74 and 0.45 respectively. Conclusion: The cut-off value of pelvic diaphragmatic hiatus in patients with POP was available and the severity of POP was positively related to the area of the pelvic diaphragmatic hiatus obviously.
		2017 Vol. 28 (7): 513-515 [Abstract] ( 1127 ) HTML (1 KB) PDF (0 KB) ( 140 )

	516	Analysis of MR imaging and clinicopathological characteristics of ovarian sertoli-leydig cell tumor
		FANG Ru-qi, ZHOU Zuo-fu, CHEN Xia-ping, MA Hong, PAN Di-ling
		Objective: To improve the diagnosis accuracy of ovarian sertoli-leydig cell tumor(SLCT), by exploring the MRI features. Materials and Methods: The MR images and clinicopathological characteristics were analysed in five cases with SLCT verified by surgery and pathology retrospectively. Results: The ages of the five cases ranged from 26 to 64 years old, three presenting signs of defeminization such as menstrual irregularities, amenorrhea and infertility, one presenting signs of masculinization such as hirsutism, acne and clitoromegaly, one complainting postmenopausal vaginal bleeding, and four cases with abdominal mass. The secrum testosterone was increased in all 5 cases. On MR, all 5 cases were unilateral with 2 in the right and 3 in the left. Four lesions were solid of round or oval shape with tiny cysts in 2 lesions. The solid components were hypointense on T1WI and slightly hyperintense on T2WI, hyperintense on DWI and hypointense on apparent diffusion coefficient map. The time signal intensity curve(TIC) of the solid regions showed sharp peak-plat form in dynamic contrast enhanced(DCE) MR imaging. One tumor was lobulated with multilobular cyst and nodular solid portion. The cyst was hypointense on T1WI and hyperintense on T2WI, while the solid part was hypointense on T1WI, slightly hyperintense on T2WI, and hyperintense on DWI. On histopathology, three SLCT cases were well differentiated, one was moderately differentiated and one was poorly differentiated. Immunohistochemically, all 5 cases were positive with inhibin and vimentin, and negative with epithelial membrane antigen(EMA). Conclusion: Ovarian SLCT demonstrates some characteristics on MR imaging, which will improve diagnosis accuracy combined with clinical features, and the final diagnosis usually depends on pathology.
		2017 Vol. 28 (7): 516-520 [Abstract] ( 917 ) HTML (1 KB) PDF (0 KB) ( 120 )

	521	The present imaging diagnosis and research progress of autoimmune pancreatitis
		WANG Min, SHI Yu, GUO Qi-yong
		Autoimmune pancreatitis(AIP) is a special type of chronic pancreatitis as a result of abnormal autoimmune mechanism. For lack of specific clinical manifestations and detective indicators, it is difficult to differentiate AIP from chronic pancreatitis and pancreatic cancer. Moreover, the treatment timing and course of hormone therapy directly affect the prognosis of AIP. Therefore, early diagnosis and reasonable treatment is very important. In recent years, noninvasive imaging method in autoimmune diseases diagnosis has been progressing. This article will make a review about the research progress of imaging diagnosis in AIP.
		2017 Vol. 28 (7): 521-523 [Abstract] ( 788 ) HTML (1 KB) PDF (0 KB) ( 135 )

	524	Detecting collateral circulation of the circle of Willis in healthy adult by transcranial Doppler ultrasound
		HUANG Wei, YANG Zhen-yu, LUO Ping, RUAN Li-jiang

		2017 Vol. 28 (7): 524-526 [Abstract] ( 866 ) HTML (1 KB) PDF (0 KB) ( 124 )

	526	Detection of transplanted liver rejection by shear wave elastrography
		WANG Xiao-jing, WANG Yan-qing, GUO Chao-feng, XUE Jie

		2017 Vol. 28 (7): 526-528 [Abstract] ( 802 ) HTML (1 KB) PDF (0 KB) ( 133 )

	529	CT and MRI features of paraganglioma in muscle wall of ureter: a case report and literature review
		DING Xue-mei, ZHANG Fu-zhou, GUO Zhi-wei

		2017 Vol. 28 (7): 529-530 [Abstract] ( 805 ) HTML (1 KB) PDF (0 KB) ( 135 )

	531	Epithelioid hemangioendothelioma of humerus: report of one case and literature review
		LU Ying, LIN Chang-he, LIN Fei-yun

		2017 Vol. 28 (7): 531-532 [Abstract] ( 775 ) HTML (1 KB) PDF (0 KB) ( 132 )

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