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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

2018 Vol. 29, No. 7 Published: 2018-07-20

	457	Investigation of effects of fever and chemotherapy on brain metabolism with 18F-FDG PET/CT imaging
		YUAN Ting-ting, WANG Qian, LI Yuan, ZHENG Peng-teng
		DOI: 10.12117/jccmi.2018.07.001
		Objective: To investigate the impact of fever and chemotherapy on human brain metabolism and function by using 18F-FDG PET/CT. Methods: Brain images of 18F-FDG PET/CT from 28 patients with fever of unknown origin(FUO), 26 with recent chemotherapy and 31 with negative PET/CT examination(as the control group) were retrospectively studied. On PET/CT images, the maximum standardized uptake value(SUVmax) of cortex and basal ganglia were measured, and ratio of cortex to basal ganglia SUVmax(Rc/b-SUVmax) was calculated, and FDG uptake changes in patients with fever or chemotherapy were also analyzed by using an optimized voxel-based statistical parametric mapping(SPM). Mini-mental state examination(MMSE) was used to evaluate whether fever and chemotherapy can lead to changes in the cognitive function. The cerebral uptake of 18F-FDG in patients with FUO or patients with chemotherapy-treatment was compared with the control group, as well as compared between the patients with FUO and the patients with chemotherapy-treatment, respectively. Results: Compared with the control group, the cortex SUVmax and basal ganglia SUVmax were significantly decreased both in the patients with FUO(P<0.001, P=0.004) and patients with chemotherapy-treatment(P=0.007, P=0.013), but Rc/b-SUVmax only in patients with FUO(P<0.001). SPM analysis results consistent with the results of semi-quantitative analysis. It was found that patients with FUO has a more decreased FDG uptake on cortex, comparing to patients with chemotherapy treatment(P=0.015), and MMSE scores were lower than the control group(P=0.004). Conclusion: Both fever and chemotherapy could bring about a diffuse reduce in cerebral glucose metabolism. Decreased uptake of FDG in cerebral cortex is more obvious in patients with a long time fever, and it may lead to a cognitive dysfunction.
		2018 Vol. 29 (7): 457-460 [Abstract] ( 918 ) HTML (1 KB) PDF (929 KB) ( 155 )

	461	Analysis of intracranial vascular characteristics of cerebral infarction patients with low and#br# high risk according to the ESSEN stroke risk score by 3D-TOF-MRA
		WANG Lin, SHEN Guang-shu
		DOI: 10.12117/jccmi.2018.07.002
		Objective: To discuss the correlations between the ESSEN stroke risk score(ESRS) and intracranial vascular stenosis, vascular branch density and the infarct size respectively by the retrospective analysis of intracranial vascular characteristics in the cerebral infarction patients. Methods: 104 cerebral infarction patients confirmed by head MRI examinations and 3D-TOF-MRA in our department from July 2016 to June 2017 were investigated retrospectively. General information of patients were registered, the ESRS score and the infarct size were measured, and the features including the number of intracranial vessels with stenosis and the vascular branch density were analyzed. Patients were divided into low risk group and high risk group according to the ESRS. The differences of vascular characteristics including the vascular stenosis rate, the vascular branch density and the infarct size between two groups were compared by Chi-square analysis. The correlations between the ESRS and the intracranial vascular stenosis, vascular branch density and the infarct size were analyzed by the Spearman rank correlation. Results: The low risk group showed lower rate of intracranial vascular stenosis and higher vascular branch density than the high risk group. The ESRS was moderately positively correlated with the intracranial vascular stenosis, moderately negatively correlated with the vascular branch density and weakly positively correlated with the infarct size. Conclusion: The ESRS shows high correlation with intracranial vascular lesions, and high risk patients have more possibility of intracranial vascular stenosis.
		2018 Vol. 29 (7): 461-463 [Abstract] ( 697 ) HTML (1 KB) PDF (778 KB) ( 126 )

	464	Analysis of physiological pit in medial orbital wall with CT
		LI Shan
		DOI: 10.12117/jccmi.2018.07.003
		Objective: To analyze CT findings of physiological pit in medial orbital wall. Methods: Twenty-one cases with physiological pit in medial orbital wall were included and classified according to the features of axial CT images. Related parameters were measured. Results: According to axial CT image features, the cases were divided into 3 categories: arc sunken pit(15 cases), angle sunken pit(4 cases) and irregular sunken pit(2 cases). Related parameters: ①Depth of the sunken pit: minimum depth 2.1 mm, maximum depth 6.4 mm, average depth (4.0±1.4） mm. ②Length of the sunken pit: minimum length 5.1 mm, maximum length 19.7 mm, average length (13.3±3.7) mm. ③Position of the apex of a sunken pit, on axial CT image: middle 1/3 of lamina was the most common, back 1/3 was the second, front 1/3 was the least; on coronal CT image: the upper half of lamina orbital was the most common, the lower half was the least. Conclusion: 2.6% of the people have physiological pit in the medial orbital wall. The understanding of this phenomenon can improve the identification ability of physiological sunken pit and fracture.
		2018 Vol. 29 (7): 464-467 [Abstract] ( 899 ) HTML (1 KB) PDF (1001 KB) ( 137 )

	468	Study of the stiffness of normal carotid artery by real-time shear wave elastography and ultrafast pulse wave velocity
		YANG Mi, YANG Han-ning, SUN Yue, CHEN Min, LU Yong-ping
		DOI: 10.12117/jccmi.2018.07.004
		Objective: To explore a hardness range of longitudinal and circumferential wall of normal common carotid artery by real-time shear wave elastography and ultrafast pulse wave velocity and to investigate the impact factors of the hardness of the artery wall. Methods: 120 cases of normal carotid artery diagnosed by ultrasound were recruited for the study. The real-time shear wave elasticity was performed to obtain the elastic modules(Mean, Max, Min) of the anterior and posterior wall of normal common carotid artery as the longitudinal hardness range of the normal carotid artery wall. The ultrafast pulse wave velocity was performed to obtain the pulse wave velocity of normal carotid artery, including the pulse wave velocity in the beginning of the systole and the pulse wave velocity in the end of the systole of normal carotid artery as the circumferential hardness range of the normal carotid artery wall. Results: The hardness of the anterior wall of the normal common carotid artery was higher than that of the posterior wall under real-time shear wave elastic imaging(P<0.05). The elasticity values(Mean, Max, Min) of the normal common carotid artery wall(posterior and anterior) were positively correlated with the age(P<0.05). The PWVBS and PWVES of normal common carotid artery wall were positively correlated with the age(P<0.05). Conclusion: Real-time shear wave elastography and ultrafast pulse wave velocity can quantitatively assess the hardness of the common carotid artery and provide reference for the diagnosis of vascular related diseases. The hardness range of longitudinal and circumferential vascular wall of normal carotid artery is consistent.
		2018 Vol. 29 (7): 468-470 [Abstract] ( 837 ) HTML (1 KB) PDF (760 KB) ( 115 )

	471	Predictive value of the positioning image in neck CT scans for clavicular artifacts of thyroid
		HU Guang-zhu, ZHU Da-rong, HAN Zhi-jiang
		DOI: 10.12117/jccmi.2018.07.005
		Objective: To evaluate the predictive value of the positioning image in neck CT scans for clavicular artifacts of thyroid. Methods: A retrospective analysis of 211 cases of neck CT scaning data was performed to measure the size of the jaw-pharynx angle(the angle between the lower edge of the mandible and the postpharyngeal wall) and the number of vertebra (shoulder not be covered). SPSS 19 analysis software was used to analyze the degree of jaw-pharynx angle and the number of vertebra displayed in thyroid with or without clavicular artifacts, the thresholds of which would be predicted by the receiver operating characteristic(ROC) curve. Results: The degree of jaw-pharynx angle(t=5.63， P＜0.05) and the number of vertebra(t=12.29, P＜0.05) displayed in thyroid with or without clavicular artifacts were statistically different. The area under the ROC curve of the degree of jaw-pharynx angle and the number of vertebra for the predictive value of thyroid without clavicular artifacts were 0.744 and 0.873, respectively. With the increase of degree of jaw-pharynx angle and the number of vertebra, the sensitivity of prediction of thyroid without clavicular artifacts decreased, but the specificity increased. When the degree of the jaw-pharynx angle and the number of vertebra were 80.875° and 5.75 respectively, the Youden’s indexes were the maximum, which were 0.402 and 0.625 respectively. And at this time, the sensitivity and specificity of prediction of thyroid without clavicular artifacts were 64.1% and 76.1%, 82.1% and 80.4%, respectively. When the jaw-pharynx angle was no less than 80.875° and the number of vertebra was no less than 5.75, the incidence rate of thyroid without clavicular artifacts was 91.0%. When the jaw-pharynx angle was less than 80.875° and the number of vertebra was less than 5.75, thyroid without clavicular artifacts occurred at a rate of 14.3%. Conclusion: It is effective to evaluate the clavicular artifacts of thyroid by observativing the positioning image in the neck CT scanning about the degree of jaw-pharynx angle and the number of vertebra. And it can help to decrease the influence of clavicular artifacts for thyroid, and to improve the quality of images.
		2018 Vol. 29 (7): 471-474 [Abstract] ( 842 ) HTML (1 KB) PDF (904 KB) ( 119 )

	475	Feasibility of personalized ultra-low-dose scan in pediatric chest CT by 70 kV combined with#br# ASiR-V iterative reconstruction in wide-coverage volume scan
		DING Jie, HE Wei-heng, YANG Li-li, CAO Yong-pei, WANG Ze-run, GAO Yong-bin, HA Ruo-shui
		DOI: 10.12117/jccmi.2018.07.006
		Objective: To explore the feasibility of personalized ultra-low-dose scan in pediatric chest CT by 70 kV combined with ASiR-V iterative reconstruction in wide-coverage volume scan. Methods: 138 pediatric patients were enrolled and separated into four groups according to the scan length of patients: group 1(8 cm): 57 cases; group 2(12 cm): 32 cases; group 3(14 cm): 26 cases; group 4(16 cm): 23 cases. All the patients underwent chest scans with one rotation wide-coverage volumes scan, the tube voltage was 70 kV, ASiR-V 60% iterative reconstruction was adopted. The image quality was evaluated by two radiologists using 5-point scores, when their scores were inconsistent, the averaged score was taken. CTDIvol and DLP were recorded, image attenuation and noise were measured, signal-to-noise(SNR) and effective radiation dose(ED) were calculated. Results: The subjective image quality scores had good consistency(Kappa=0.703, P=0.118). The image quality scores of the four groups were (4.50±0.51), (4.67±0.58), (4.38±0.66) and (4.50±0.58). The SD was (14.62±1.46) HU, (14.31±3.57) HU, (14.78±2.13) HU, (14.46±1.49) HU. The SNR was (3.21±0.60), (3.96±0.59), (2.98±0.71) and (3.26±0.61). The CTDIvol was (0.71±0.11) mGy, (0.74±0.06) mGy, (0.80±0.07) mGy and (0.86±0.04) mGy. The DLP was (5.89±0.79) mGy·cm, (7.88±0.92) mGy·cm, (10.70±1.02) mGy·cm and (11.72±0.97) mGy·cm. The ED was (0.23±0.03) mSv, (0.24±0.03) mSv, (0.26±0.05) mSv and (0.21±0.02) mSv. Conclusion: The ultra-low-dose scanning with one rotation scan, 70 kV and ASiR-V iterative reconstruction provide good image quality for diagnosis of pneumonia in pediatric chest CT.
		2018 Vol. 29 (7): 475-478 [Abstract] ( 748 ) HTML (1 KB) PDF (826 KB) ( 119 )

	479	The clinical evaluation of ToF reconstruction in simultaneous integrated PET/MR in the diagnosis of body tumors
		ZHANG Xin1, GUO Qi-yong1, SUN Hong-zan1, WANG Bo1, LIU Chang-ping1,
		DOI: 10.12117/jccmi.2018.07.007
		Objective: To assess the image quality and clinical evaluation in simultaneous integrated time of flight(ToF) PET/MR. Methods: Twenty-one patients with primary tumors were analyzed, and the ability in lesion recognition and standard uptake value(SUVmax and SUVmean) and signal noise ratio(SNR) between ToF and non-ToF reconstruction method were compared. Results: With ToF and non-ToF reconstruction methods, the maximum SUV of the primary tumors(T-SUVmax) were 18.37±12.71, 17.12±12.17 respectively, and average SUV(T-SUVmean) were 10.17±6.97, 9.34±6.58. The maximum SUV of the normal tissue(N-SUVmax) were 1.71±1.07, 1.46±0.82, and average SUV(N-SUVmean) were 1.24±0.65, 1.15±0.66. The difference of the above four parameters between the two methods were statistically significant(P<0.001). T-SUVmax and T-SUVmean with ToF increased by 9%±5%, 10%±4% compared with non-ToF. The image quality was better with the ToF reconstruction methods. The SNR with ToF was significantly higher than that of non-ToF(ToF, 10.59±3.07 vs. non-ToF, 10.13±3.35, P<0.05). Conclusion: Simultaneous integrated PET/MR can be of great significance and importance with ToF reconstruction in lesion recognition and semi-qualified analysis.
		2018 Vol. 29 (7): 479-482 [Abstract] ( 682 ) HTML (1 KB) PDF (2322 KB) ( 279 )

	483	The clinical value of the level of serum CA19-9, CA242 combined with ultrasound sonography, #br# contrast-enhanced ultrasound, PET/CT, CT in the diagnosis of pancreatic cancer
		ZHAO Li, LI Ming-xing, ZHOU Jing
		DOI: 10.12117/jccmi.2018.07.008
		Objective: To investigate the clinical value of the level of serum CA19-9, CA242 combined with ultrasound sonography, contrast-enhanced ultrasound, PET/CT, CT in the diagnosis of pancreatic cancer. Methods: A retrospective analysis was performed for the clinical data of 60 patients with pancreatic cancer confirmed by surgical exploration or postoperative pathological examination from January 2014 to March 2017 in the Affiliated Hospital of Southwest Medical University. The levels of serum CA19-9 and CA242 were detected, and ultrasound sonography, contrast-enhanced ultrasound, PET/CT and CT were performed. Results: Compared with the normal, the level of serum CA19-9, CA242 in patients with pancreatic cancer were markedly elevated. The combination of CA19-9 and CA242 could increase the sensitivity in the diagnosis of pancreatic cancer. Combined with the level of serum CA19-9 and CA242, the diagnostic accuracy and sensitivity contrast-enhanced ultrasound or PET/CT were greater than those of ultrasound sonography or CT. There was no significant difference between contrast-enhanced ultrasound and PET/CT in the definitive diagnosis of pancreatic cancer. Conclusion: The combination of CA19-9 and CA242 with contrast-enhanced ultrasound or PET/CT could promote the diagnostic accuracy of pancreatic cancer. Contrast-enhanced ultrasound has advantage in finding the tiny lesions of pancreatic cancer, and PET/CT could diagnose metastasis of pancreatic cancer. Contrast-enhanced ultrasound and PET/CT could help to guide the treatment of pancreatic cancer.
		2018 Vol. 29 (7): 483-485 [Abstract] ( 711 ) HTML (1 KB) PDF (807 KB) ( 114 )

	486	Evaluation of the correlation between BMI of healthy people and pancreatic fat quantification by IDEAL-IQ
		ZHANG Qin-he1, LIU Ai-lian1, GUO Wei-ya1, TIAN Shi-feng1,
		DOI: 10.12117/jccmi.2018.07.009
		Objective: To detect the correlation between BMI of normal healthy people and pancreatic fat quantification by using IDEAL-IQ. Materials and Methods: Thirty-two participants undergoing upper abdomen 1.5T MRI(GE 1.5T Signa HDXT, America) with IDEAL-IQ sequence, were included in this study. Participants were divided into two groups by BMI.Group A(BMI 20.4~23.5 kg/m2) are individuals of normal weight. Group B(BMI 24.0~29.6 kg/m2) are overweighted individuals. Images were uploaded to the ADW4.6 workstation and measured by the software. Three ROIs were placed at the same level in the pancreas uncinate process, head, body and tail, respectively, and the final value of pancreatic fat quantification was the average. The images were double-blindly measured by two radiologists with diagnostic experiences of 3 years and 5 years, respectively. The data were analyzed by SPSS 19.0. Results: Neither age nor gender showed statistical significance between the two groups(P>0.05). The inter-observer agreements were high. The comparison of the average pancreatic fat fraction as well as fat fraction of the pancreatic uncinate process, head and neck, body and tail between the two groups were statistically significant(P<0.05). The fat fraction of uncinate process of the pancreas was weakly correlated with BMI(r=0.396, P<0.01), and the association between the fat fraction of pancreatic head and neck, body and tail and BMI was moderate(r=0.468, 0.641 and 0.648, P<0.01, respectively). No statistical significance was found among the fat fraction of the varied pancreatic locations in the group A(P>0.05), but there was statistical significance in group B(P<0.05). The fat fraction of the body and tail was greater than that of the uncinate process and head and neck(P<0.05). Conclusion: IDEAL-IQ is a convenient and non-invasive method for quantification of pancreatic fat, which has good reproducibility and reliable results. It was found that there were significant differences in fat content of the pancreas between normally weighted and overweighted individuals. For the overweighted, the body and tail are the sensitive sites of fat infiltration in the pancreas.
		2018 Vol. 29 (7): 486-490 [Abstract] ( 678 ) HTML (1 KB) PDF (896 KB) ( 148 )

	491	Influence of different prandial state on pancreatic stiffness measured by#br# MR elastography in healthy volunteers
		ZHANG Hong-yang, LIU Yan-qing, JI Ruo-yun, WANG Min, SHI Yu
		DOI: 10.12117/jccmi.2018.07.010
		Objective: To evaluate the influence of different prandial state on pancreatic stiffness by MR elastography in healthy volunteers. Methods: Pancreatic stiffness measurements were got and compared in 24 healthy volunteers at 40 Hz and 60 Hz before and after a standard liquid meal(an effective method to increase pancreatic blood flow). Results: At 40 Hz, the mean pancreatic stiffness measurements before meal was significantly higher than after meal (1.174±0.121) kPa vs (1.106±0.123) kPa, t=5.95, P<0.001. At 60 Hz, the mean pancreatic stiffness measurements before and after a standard meal had no significant difference ((2.221±0.223) kPa vs (2.266±0.251) kPa, t=0.57, P=0.57). There was 6.2% difference between the two prandial states at 40 Hz. The image quality score of wave was (4.25±0.73) at 40 Hz and (2.41±0.83) at 60 Hz(P<0.001) at fast state. Conclusion: Compared with 60 Hz, 40 Hz had better wave pattern and can detect tiny changes of pancreatic stiffness,which is more suitable for pancreatic MRE.
		2018 Vol. 29 (7): 491-493 [Abstract] ( 634 ) HTML (1 KB) PDF (743 KB) ( 96 )

	494	MRI manifestations and diagnostic value of postpartum placental residue
		HE Chun-yan, ZHANG Jun
		DOI: 10.12117/jccmi.2018.07.011
		Objective: To investigate the main imaging findings and diagnostic value of MRI in the diagnosis of postpartum placental residue. Methods: MRI literatures of 90 cases of postpartum placental residue confirmed by clinical surgery and pathology were retrospectively analyzed. The size of the uterus and placenta were measured respectively, T1 and T2 signal intensity and enhancement characteristics of placental residue were evaluated. Other imaging findings including placenta attachment band integrity, uterine muscle thickness and signal intensity were investigated as well. Results: The MRI diagnositic sensitivity of postpartum placental residue without adhesion and implantation, placenta adhesions, placenta residual implantation and placenta penetration were 78.3%, 57.1%, 90.7%, 66.7% respectively, and the diagnostic specificity were 98.5%, 91.3%, 74.5%, 100.0%. For enhanced MRI, the sensitivity were 100.0%, 81.8%, 100.0%, 66.7% correspondingly, and the specificity were 96.8%, 100.0%, 88.2%, 100.0%. The size of placental residue ranged from 36.55 mm×28.60 mm×35.10 mm to 98.30 mm×68.56 mm×135.20 mm, with isointensive T1 signal and heterogeneous T2 signal. In 13 cases of placental residue implantation and 3 cases of placental residue adhesion, multiple thick and tortuous vessels were found inside the myometrium or between myometrium and placental remnant tissue. Post contrast MRI showed no enhancement in 3 cases of placental residue without adhesion and implantation and markedly heterogeneous enhancement during early stage were observed in 9 cases of placental residue adhesions, 17 cases of placental residue implantation and 3 cases of placental residue penetration. Conclusion: Unenhanced and enhanced MRI can be applied in determination of the type of placental residue and evaluation of implant depth,which can also clearly observe the placental residue and the blood supply situation of its attached surface.
		2018 Vol. 29 (7): 494-497 [Abstract] ( 745 ) HTML (1 KB) PDF (999 KB) ( 107 )

	498	Prenatal ultrasonographic diagnosis of fetal right isomerism syndrome
		LI Xue-lei, MU Zhong-ping, HUANG Ting
		DOI: 10.12117/jccmi.2018.07.012
		Objective: To investigate the prenatal ultrasonographic features of the right isomerism syndrome and to improve its prenatal detection rate. Methods: Ultrasonographic features of 11 cases of fetal isomerism in our hospital from April 2015 to May 2017 was analyzed. Results: In 11 cases of right isomerism syndrome, there were 10 cases of malposition of chest and abdominal organs(10/11). In 6 cases, the space between the gastric bubble and the spinal column was narrow, showing an adjacent relationship(6/11). Eleven cases were complicated with heart malformations and venous anomalies. Eight cases had pulmonary venous abnormalities, including 4 cases of the formation of the common pulmonary vein draining into the right atrium. Three cases had extracardiac malformations, including cleft lip, hiatal hernia and intestinal duplication. All 11 cases were confirmed by induction of labor or intrauterine MRI. Conclusions: Fetus with right isomerism syndrome has its characteristic cardiac malformation, and abnormal return of the body and pulmonary veins can help to evaluate its prognosis.
		2018 Vol. 29 (7): 498-500 [Abstract] ( 879 ) HTML (1 KB) PDF (1744 KB) ( 127 )

	501	Prenatal ultrasound diagnosis and follow-up of fetal hepatic vascular malformation
		WANG Yun-qin, ZHAO Yan, LI Chuan-hong
		DOI: 10.12117/jccmi.2018.07.013
		Objective: To investigate the prenatal ultrasonographic features of fetal hepatic vascular malformation and discuss its clinical value combining with outcome follow-up. Methods: We retrospectively analyzed sonographic features of 7 cases of fetal liver vascular malformation diagnosed by prenatal ultrasound in our hospital, and performed follow-up for the prognosis of intrahepatic arteriovenous fistula and portoveinous fistula. Results: Seven fetuses with gestational age of 29~39 weeks were diagnosed including 4 cases of intrahepatic arteriovenous fistula, 2 cases of portovenous fistula, 1 case of intrahepatic arteriovenous fistula with portovenous fistula. According to 2-year follow-up after birth, 4 cases of intrahepatic arteriovenous fistula had no clinical symptoms after birth. Among them, 2 cases were cured after interventional operation, the lesion of 1 case disappeared after six months, and the size of the lesion decreased in 1 case six months after birth. In 2 cases of hepatic portovenous fistula, 1 infant died after birth, the other one which was combined with esophageal atresia and intracranial arachnoid cyst underwent induced labor. One case of intrahepatic arteriovenous fistula combined with portovenous fistula underwent induced labor. The ultrasound images of fetal hepatic vascular malformation showed cystic, tubular or irregular anechoic drainage between hepatic artery or portal vein and hepatic vein, filled with blood flow signal in CDFI. Thickened hepatic proper arteries were found in intrahepatic arteriovenous fistula, spectral Doppler showed lesions of high speed low resistance artery-like spectrum. The portoveinous fistula was connected with the hepatic vein, and the spectrum changed into a single-phase continuous blood flow. There were two peaks and two troughs, which were similar to the spectrum of the venous catheter. Conclusion: Prenatal fetal hepatic vascular malformation has characteristic ultrasound findings, and ultrasonography could be used as the first choice of examination modality. It is of great importance in guiding clinical treatment.
		2018 Vol. 29 (7): 501-504 [Abstract] ( 837 ) HTML (1 KB) PDF (977 KB) ( 117 )

	505	Diagnostic performance of dual-energy CT for the detection of bone bruise in the wrist
		REN Qiu-ping, TANG De-qiu, ZHAO Heng, LIU Jin-cai, XIAO Wen-lian, LI Jin-song,
		DOI: 10.12117/jccmi.2018.07.014
		Objective: To evaluate the performance of virtual non-calcium images reconstructed from DECT for the diagnosis of bone marrow lesions in patients with acute wrist joint trauma in comparison with MRI. Methods: Thirty-five patients underwent DECT(80 kVp and 140 kVp with tin filter) and MR imaging within 3 day following acute wrist trauma. Presence of traumatic bone bruise on MR and virtual non-calcium images were graded respectively by the readers using a four-point system(3=distinct bone marrow lesion, 0=no lesion), and CT values in virtual non-calcium images were calculated. Results: All bone marrow lesions used MR images as a reference standard. Bone marrow graded 2~3 was considered positive. The sensitivity, specifity, negative predictive value and positive predictive value were 83.33%, 91.30%, 83.33% and 91.30% by analyzing DECT images of the distal ulnar radius bone marrow. In non-calcium images, the grades of bone marrow lesion gradually increased from 0 to 3(P<0.001) with increasing corresponding CT values. There were significant differences in CT values between the positive and negative regions(P<0.001). CT numbers for distal ulna and radius bone marrow lesions were analyzed by ROC, revealing areas under the receiver operating characteristic curve greater than 0.5. Conclusion: Compared with MR images, bone bruises of the wrist joint can be diagnosed on virtual non-calcium images reconstructed from DECT with high specificity and excellent negative predictive value. DECT may be a potential alternative method to MRI contraindications.
		2018 Vol. 29 (7): 505-509 [Abstract] ( 757 ) HTML (1 KB) PDF (908 KB) ( 169 )

	510	The diagnostic value of MRI on posterior ankle impingement syndrome
		LI Jia-shi1, HONG Chun-peng1, SUN Zan2, ZHANG Li-juan2
		DOI: 10.12117/jccmi.2018.07.015
		Objective: To evaluate clinical application of MRI on posterior ankle impingement syndrome. Methods: The MR images of 14 ankle joints in 12 patients clinically confirmed posterior ankle impingement syndrome, were retrospectively analyzed. MRI characteristics and the occurrence rate were respectively summarized according to the sorts of bone and soft tissue impingement. Results: Of all the bone impingement factors, there were 7 cases(7/14, 50%) with os trigonum existence or/and lesion, 7 cases(7/14, 50%) with over length or hyperplasia of posterior process of talus. Of all the soft tissue impingement factors, there were 2 cases(2/14, 14.29%) with the posterior tibiofibular ligament injury, 5 cases(5/14, 35.71%) with posterior ligament injury, 2 cases(2/14, 14.29%) with the ankle ligament injury, 12 cases(12/14, 85.71%) with tenosynovitis of the flexor hallucis longus, 14 cases(14/14, 100%) with tibiotalar and talocalcaneal joint arthritis and synovitis, and 13 cases(13/14, 92.86%) with fat tissue swelling around os trigonum. Conclusion: MRI can be the first choice of examination and can provide objective imaging evidence in diagnosis of posterior ankle impingement syndrome.
		2018 Vol. 29 (7): 510-513 [Abstract] ( 832 ) HTML (1 KB) PDF (1241 KB) ( 85 )

	514	Advance of radiographic evaluation of postoperative pancreatic fistula
		JI Ruo-yun, SHI Yu, GUO Qi-yong, LIU Yan-qing
		DOI: 10.12117/jccmi.2018.07.016
		Postoperative pancreatic fistula(POPF) is the most common and serious complication after pancreatic operation. Preoperative prediction of pancreatic fistula has great significance in improving the treatment of postoperative stump, postoperative care, prevention and reduction of POPF. In addition to systemic factors and technical factors, pancreatic fistula is closely related with local factors of pancreatic stump. With the development of imaging technology, noninvasive imaging can realize multi-evaluation of morphology, texture and function of pancreatic stump, and make it possible to predict pancreatic fistula. In this paper, we will review the imaging evaluation index to predict pancreatic fistula, and summarize the new progress of imaging evaluation in recent five years.
		2018 Vol. 29 (7): 514-516 [Abstract] ( 740 ) HTML (1 KB) PDF (762 KB) ( 108 )

	517	Evaluation of the correlation between H-type hypertension and#br# carotid plaque characteristics by ultrasonic elastography
		WU Di, MA Ning, WANG Fang, ZHANG Fang, WANG Yi, CHANG Lin
		DOI: 10.12117/jccmi.2018.07.017

		2018 Vol. 29 (7): 517-519 [Abstract] ( 785 ) HTML (1 KB) PDF (899 KB) ( 123 )

	520	Differential diagnosis and analysis of peri-appendicular abscess and#br# right fallopian tube ovarian abscess from CT imaging features
		ZHANG Zhi-guo, MAO Xu-ping, JI Dan, ZHENG Yu-ping, LIN Xiao-dong, PAN Zhen-fei
		DOI: 10.12117/jccmi.2018.07.018

		2018 Vol. 29 (7): 520-523 [Abstract] ( 744 ) HTML (1 KB) PDF (1746 KB) ( 100 )

	523	The application value of color super microvascular imaging in finger and wrist joints with active rheumatoid arthritis
		YU Xiao-long, WU Jia-biao, LI Zun, REN Min
		DOI: 10.12117/jccmi.2018.07.019

		2018 Vol. 29 (7): 523-525 [Abstract] ( 841 ) HTML (1 KB) PDF (817 KB) ( 94 )

	526	CT diagnosis of a large gastric mesenchymal tumor in children: report of one case and literature review
		CAO Ji-shan
		DOI: 10.12117/jccmi.2018.07.020

		2018 Vol. 29 (7): 526-527 [Abstract] ( 801 ) HTML (1 KB) PDF (833 KB) ( 164 )

	527	Urachal tumor in pelvic cavity on 18F-FDG PET/CT imaging: report of one case
		LIU Yi, JIA Ou, LI Ya-ming
		DOI: 10.12117/jccmi.2018.07.021

		2018 Vol. 29 (7): 527-528 [Abstract] ( 667 ) HTML (1 KB) PDF (817 KB) ( 85 )

	529	Multiple nerve sheath myxoma in both hands: report of one case
		YANG Ming-hao, LI Jun, KONG Li-qing, TAN Ke-ping, QU Pei-gang
		DOI: 10.12117/jccmi.2018.07.022

		2018 Vol. 29 (7): 529-530 [Abstract] ( 777 ) HTML (1 KB) PDF (815 KB) ( 124 )

	530	Osmotic demyelination syndrome: report of two cases and literature review
		WANG Wen-fei1, YANG Xin-guo1, JIANG Xing-yue2
		DOI: 10.12117/jccmi.2018.07.023

		2018 Vol. 29 (7): 530-532 [Abstract] ( 699 ) HTML (1 KB) PDF (818 KB) ( 120 )

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