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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
2016 Vol. 27, No. 5
Published: 2016-05-20
 
305 A comparative study of 18F-FDG PET and MRI in the localization of intractable temporal lobe epilepsy
ZHAO Chun-lei, CHEN Zi-qian, QIAN Gen-nian, YANG Zhong-dong, WANG Kai-tang
Objective: To evaluate the value of 18F-FDG PET and MRI in the localization of temporal lobe epileptic focus. Methods: Seventy-eight patients diagnosed as TLE underwent conventional MRI, MRS and 18F-FDG PET brain imaging. With the pathological results as the gold standard, the accuracies of these three methods and combined application of these three methods were analyzed to evaluate the value of the methods mentioned above. Results: After statistical analysis, the values of NAA/(Cho+Cr) and SUVmean in the affected side were lower than that of the healthy side. The accuracy rates of these three kinds examinations and combined application of these three methods in localization of temporal lobe epileptic focus were 33.33%(26/78), 58.97%(46/78), 85.89%(67/78)  and 89.74%(70/78) respectively. After the chi-square test, there was statistically significant difference(χ2=73.090, P<0.001). Using the chi-square decomposition to further pairwise comparison with the P value corrected to 0.008 as the standard, the differences between conventional MRI and MRS, 18F-FDG PET imaging, combined application were statistically significant(χ2 was 10.317, 44.758, 52.433, respectively and P=0.001, P<0.001, P<0.001, respectively).The differences between MRS and 18F-FDG PET, combined application were statistically significant(χ2 was 14.158, 19.366, respectively and P values are both less than 0.01). The difference between the 18F-FDG PET and the combined application was statistically significant(χ2=0.539, P=0.463). Conclusion: MRI can be used in the clinical diagnosis of epilepsy, but the conventional MRI and MRS examination should be carried out at the same time, because the accuracy of MRS was significantly higher than that of conventional MRI. Patients should be examined by 18F-FDG PET imaging if the patients were still unable to be diagnosed by the above examination and were willing to accept the examination. The combination of the three methods in localization of temporal lobe epileptic focus can significantly improve the diagnostic accuracy of intractable temporal lobe epilepsy.
2016 Vol. 27 (5): 305-308 [Abstract] ( 946 ) HTML (1 KB)  PDF  (0 KB)  ( 203 )
309 Analysis of cerebral gray matter structural changes in autistic children by IBASPM
CHEN Jing, LI Xin, WANG Chun-xiang, LIU Jun-gang, ZHAO Bin
Objective: To analyse the volume changes of gray matter structures in different brain regions of autistic children by using IBASPM software based on SPM. Methods: Twenty-three autistic children diagnosed by clinical features and 28 healthy children were selected in this study, whose age and sex were matched. High resolution T1 weighted images of each child’s whole brain were acquired by using 3D FSPGR sequence on GE HDx 1.5T MRI. The raw data was dealed with IBASPM software based on SPM5, to obtain the volume value of every brain region. Two independent sample t-test was used to compare the groups. Results: The data of 16 autistic children and 18 normal controls matched the experimental requirements. The autism group included 11 males and 5 females, whose mean age was 2.81±0.91 years old. The normal control group included 11 males and 7 females, whose mean age was 2.61±0.50 years old. Compared with the normal control group, the volume values of the left mid cingulum, left supramarginal gyrus, bilateral amygdaloid body and bilateral caudate nucleus were enlarged in the autism group; the volume value of vermis Ⅷ area was decreased. Conclusion: Some gray matter structures of autistic children were abnormally changed, which were related to emotion, language and behavior control, and then provided an objective basis for the interpretation and diagnosis of clinical symptoms of autism. The IBASPM software can be used to automatically measure the volumes of different brain regions, and to morphologically analyse the gray matter structures of autistic children.
2016 Vol. 27 (5): 309-313 [Abstract] ( 706 ) HTML (1 KB)  PDF  (0 KB)  ( 158 )
314 A clinical study on the cerebral oxygen metabolism of ischemic cerebral infarction with#br# susceptibility weighted phase imaging
NI Ming-fei, LI Xue-song, TAO Ding-bo, WEI Qiang, SONG Qing-wei, XU Bin, MIAO Yan-wei
Objective: To explore the possible causes and clinical values of the signal and phase variation of the draining veins in patients with acute cerebral infarction, by measuring the phase differences of the draining veins combined with the local hemodynamic changes. Methods: Twenty patients(aged 47~82 years, mean age 61 years; time of onset 7~48 hours, mean time 28 hours) with acute ischemic cerebral infarction were analyzed retrospectively. The scanning sequences included susceptibility weighted imaging(SWI) and dynamic susceptibility contrast-enhanced perfusion-weighted imaging(DSC-PWI). The phase differences of the veins in the infarct and contralateral areas(respectively denoted by Δφlesion and Δφnormal) were measured. The rCBF values, rrCBF values and rCBV values in the infarct and contralateral areas were measured. NIHSS scores were recorded. Results: ①The phase difference of affected side Δφlesion value=547.0±155.7(spin), the contralateral phase difference Δφnormal value=282.65±96.67(spin), Δφlesion was significantly greater than Δφnormal(t=5.861, P<0.001); ②rCBF values in the infarct area were significantly lower than that of the contralateral area(t=-8.978, P<0.001), and rCBV values in the infarct area were also lower than that of the contralateral area(P=0.008); ③There was significant positive correlation between the Δφlesion values and NIHSS scores(r=0.933, P＜0.001), and there was significant positive correlation between the Δφlesion values and rrCBF values(r=0.681, P=0.001), rrCBF values had positive correlation with NIHSS scores(r=0.645, P=0.002). Conclusion: The correlation between the phase differences in the infarct area that reflected the oxygen metabolic abnormalities and CBF were consistent with the cerebral flow-metabolism coupling mechanism. The phase differences of the veins in the infarct area could be used as a reliable indicator to evaluate the clinical severity of the patients with acute infarction.
2016 Vol. 27 (5): 314-317 [Abstract] ( 664 ) HTML (1 KB)  PDF  (0 KB)  ( 173 )
318 MRI features of cerebral small vessel disease in patients with type 2 diabetes mellitus
XIAO Zheng-guang, YANG Jun, ZHU Cai-song, SHAO Kang-wei, YUAN Li-xin, MIN Qing-hua, GU Feng, LU Wen-jie
Objective: To evaluate the manifestation of cerebral small vessel damage of type 2 diabetes using noninvasive techniques of MR imaging, and to provide useful information for clinical diagnosis, therapy, and long term evaluation of diabetes. Materials and Methods: Four hundred and thirty-seven neurology inpatients were recruited in our study between January 2013 and December 2013, eighteen cases were excluded. Diabetes group and non-diabetes group were observed. All patients underwent brain MRI with T1WI, T2WI, FLAIR, DWI, SWI and T2WI sequences in 3.0T scanner. The incidence rate and distribution pattern of acute infarction, cerebral micro hemorrhage, the number of lacunar infarction and the degree of leukoaraiosis were recorded. Results: The incidence rate of infarction caused by small vessel occlusion was higher in diabetes group than in non-diabetes group(68.2% vs 43.2%). There was statistical difference between diabetes group and non-diabetes group(χ2=7.49, P<0.05). Compared with non-diabetes, diabetes group showed up more serious degree in previous cerebral apoplexy, lacunar infarction and leukoaraiosis. There was no statistical difference in the occurrence rate of cerebral micro-hemorrhage between the two groups(P>0.05). Conclusion: Small lesions was mainly presented in acute infarction happened in patients with type 2 diabetes. The severity of lacunar infarction and leukoaraiosis occurred in diabetes group was severer than that in non-diabetes group.
2016 Vol. 27 (5): 318-322 [Abstract] ( 611 ) HTML (1 KB)  PDF  (0 KB)  ( 211 )
323 The study of using MR diffusion weighted imaging to improve the value of endoscopic biopsy in#br# follow-up of nasopharyngeal carcinoma
LI Wei, REN Zhi-gang, TANG Ri-jie, LU Bin-gui
Objective: To improve the positive rate of endoscopic biopsy in follow-up of nasopharyngeal carcinoma(NPC) through MR diffusion weighted imaging. Methods: In the follow-up of NPC after treatment, 135 cases with suspicious recurrent were found negative result in the first endoscopic biopsy, then were performed with MR routine sequence and diffusion weighted sequence scanning before the second endoscopic biopsy. Through observing MR images, the positions of nasopharyngeal biopsy were decided, including MR-A location(MR routine sequence) and MR-B location(MR routine sequence and diffusion weighted sequence). In the second endoscopic biopsy, the tissue particle was obtained according to endoscope image(endoscopic location), and then each tissue particle was gotten according to MR-A and MR-B locations. The diagnostic value of the 3 kinds of locations and the influence of location consistency on the 2 kinds of MR locations were analyzed by comparing with the qualitative results. Results: in 135 cases, 56 cases were eventually confirmed for recurrence, 79 cases for no recurrence. Endoscopic location, MR-A location and MR-B location were found positive in 26 cases, 33 cases, 40 cases, negative in 109 cases, 102 cases, 95 cases, the sensitivity for 46.4%, 58.9%, 71.4%, the specificity all for 100%, Az values for 0.732, 0.795, 0.857. Because of the specificities all were 100%, the recurrence cases were analyzed. There was a correlation between the 2 kinds of MR locations(χ2=4.250, P=0.039, Kappa=0.265). In 56 cases with recurrence, biopsy sites of 2 MR locations were consistent in 32 cases and inconsistent in 24 cases. The consistency of biopsy directions had significant effects on the results of MR-A location(χ2=5.171, P=0.023, rp=0.304) and had no significant effects on the results of MR-B location(χ2=0.007, P=0.932, rp=0.011). When the biopsy directions were inconsistent, the positive rate of MR-A(41.7%, 10/24) was less than that of MR-B(70.8%, 17/24), there was significant difference(χ2=4.148, P=0.042). Conclusions: During the follow-up of NPC, MR assisted localization can help nasopharyngeal endoscope biopsy to improve the accuracy rate and reduce the misdiagnosis rate, and MR diffusion weighted imaging has greater value in the auxiliary positioning.
2016 Vol. 27 (5): 323-327 [Abstract] ( 672 ) HTML (1 KB)  PDF  (0 KB)  ( 195 )
328 Study on the damage degree of parotid gland uptake function in patients with xerostomia by#br# salivary gland scintigraphy
YANG Qin-qin1, LIU Zhi-xiang2
Objective: To investigate the salivary gland scintigraphy(SGS) image feature of the damage degree of parotid gland in patients with xerostomia, and to comprehensively evaluate the damage degree of parotid gland uptake function combined with the 95% confidence interval. Materials and Methods: 68 patients with xerostomia and 18 healthy volunteers(control group) collected in Affiliated Hospital of Weifang Medical College from October 2013 to November 2014 were examined with 99TcmO4- salivary gland dynamic imaging. The dynamic images of parotid gland and the time-radioactive curve were observed and grouped, and the uptake rate and 95% confidence interval were calculated, then the uptake rate of the observation group and the control group were compared. Results: The UR2, UR8 and UR15 in the mild injury group, moderate injury group and severe injury group were significantly lower than those in the control group(P＜0.05). In the moderate injury group and severe injury group, the UR2, UR8 and UR15 were significantly lower than those in the mild injury group(P＜0.05). Compared with the moderate injury group, the UR8 and UR15 in the severe group were significantly decreased(P＜0.05), while the UR2 was no significant difference(P>0.05). And combined with its 95% confidence interval, UR2 1.48%~1.66% or UR8 2.05%~2.49% was diagnosed with minor injury, UR8 1.64%~2.05% or UR15 2.14%~2.64% with medium injury, UR15<2.14% with severe injury. Conclusion: The characteristic of SGS image can preliminarily evaluate the intake function of parotid gland, and parameter UR2, UR8 and UR15 can be used for quantitative analysis of the damage degree, combined with its 95% confidence interval can concisely and accurately assess the damage degree of uptake function of parotid gland in patients with xerostomia.
2016 Vol. 27 (5): 328-332 [Abstract] ( 871 ) HTML (1 KB)  PDF  (0 KB)  ( 219 )
333 Combined application of contrast-enhanced US and acoustic radiation force impulse imaging in#br# differential diagnosis of solid hypo-echoic thyroid nodules
DIAO Xue-hong, ZHAN Jia, CHEN Yue, CHEN Lin, ZHU Jun, PANG Yun
Objective: To assess the value of acoustic radiation force impulse(ARFI), contrast-enhanced US(CEUS) and their combined application in differential diagnosis of solid hypo-echoic thyroid nodules． Methods: ARFI and CEUS were performed in 47 patients with 62 thyroid nodules. The results of ARFI, CEUS and their combined application, which were classified as benign or malignant ones, were compared with pathological findings. The diagnostic results of ARFI, CEUS and ARFI+CEUS were evaluated and compared． Result: The sensitivity, specificity, PPV, NPV and accuracy of the ARFI for differential diagnosis were 82.4％, 82.1％, 84.8%, 79.3%, and 82.3%, respectively. The sensitivity, specificity, PPV, NPV and accuracy of the CEUS for differential diagnosis were 88.2％, 78.6％, 83.3%, 84.6% and 83.9%, respectively. The sensitivity, specificity, PPV, NPV and accuracy of the ARFI+CEUS for differential diagnosis were 94.1%, 96.4%, 97.0%, 93.1% and 95.2%, respectively. Conclusions: ARFI and CEUS have high value in differential diagnosis of solid hypo-echoic thyroid nodules, the combined application of two methods can be helpful to improve the diagnostic accuracy．
2016 Vol. 27 (5): 333-336 [Abstract] ( 794 ) HTML (1 KB)  PDF  (0 KB)  ( 171 )
337 A comparative analysis of anteroposterior/transverse diameter ratio between ultrasonography#br# plane and gross lesion tissue in thyroid nodules
DING Jin-wang, HAN Zhi-jiang, ZHANG Wo, PENG You, LUO Ding-cun, BAO Ling-yun, GU Ying, PAN Gang
Objective: To evaluate the diagnostic value of anteroposterior/transverse diameter ratio(A/T) in cases with thyroid nodules by comparing the A/T values between ultrasonography and gross tissue. Methods: The ultrasonic findings of 85 thyroid nodules in 80 cases confirmed by surgery and pathology were analysed. The A/T values in ultrasonographic transverse and longitudinal planes were measured and compared with the A/T values in the postoperative gross tissue longitudinal plane. The A/T values in ultrasonography and gross tissue of benign and malignant thyroid nodules were observed, and the sensitivity, specificity, positive predictive value and accuracy of A/T>1 in ultrasonography in papillary thyroid carcinomas(PTC) were analysed. Results: Of 85 thyroid nodules, 60 nodules were diagnosed as PTC, the remaining as nodular goiter(NG). Among 60 nodules with PTC, there were 27 nodules with A/T>1 in ultrasonographic longitudinal plane, 8 nodules with A/T>1 in gross tissue longitudinal plane, and 8 nodules with A/T>1 in both ultrasonography and gross tissue. Among 25 nodules with NG, 4 nodules with A/T>1 in ultrasonographic longitudinal plane were found, 2 nodules with A/T>1 in gross tissue, and only 1 case with A/T>1 in both ultrasonography and gross tissue. The coincidence rate of A/T>1 in ultrasonographic and gross tissue longitudinal planes was only 33.33%(9/27), but the coincidence rate of A/T≤1 was 98.27%(57/58). The sensitivity, specificity, positive predictive value and accuracy of A/T>1 in ultrasonographic longitudinal plane in the diagnosis of PTC were 45.00%, 84.00%, 87.09% and 56.47% respectively. The sensitivity, specificity, positive predictive value and accuracy of A/T>1 in ultrasonographic transverse or longitudinal plane in the diagnosis of PTC were 61.66%, 84.00%, 90.24% and 68.24% respectively.  Conclusions: There is a large difference in A/T between ultrasonography and gross tissue in thyroid nodules, but A/T>1 in ultrasonography remains an important basis for the judgment of the PTC, the combined application of A/T in ultrasonographic transverse and longitudinal planes can improve the sensitivity, positive predictive value and accuracy of diagnosis of PTC.
2016 Vol. 27 (5): 337-340 [Abstract] ( 914 ) HTML (1 KB)  PDF  (0 KB)  ( 203 )
341 CT diagnosis of congenital cystic adenomatoid malformation of lung in adult
CHANG Na, GUO Qi-yong
Objective: To investigate the CT manifestation of congenital cystic adenomatoid malformation(CCAM) of lung in adult. Methods: From March 2005 to November 2015, 9 patients with CCAM confirmed by postoperative pathology underwent CT scanning or enhanced CT scanning preoperatively. The CT manifestation and pathological style were analyzed. Results: The lesions of 7 cases were in the right lung, 2 cases in the left lung; 7 cases involved a single lobe, only 2 cases involved two lobes. The CT manifestations of 9 cases with CCAM included macrocystic type(diameter >2 cm) in 8 cases and microcystic type(diameter <2 cm) in 1 case. 6 cases of the macrocystic type contained less than 3 cysts with smooth wall, filled fluid. 2 cases of the macrocystic type were polycystic structure(>3), and the cyst wall was not smooth, with ridge-like protrusions and multiple separation. 1 case of microcystic type was honeycomb structures with homogenous cyst size(<2 cm). Finally, pathological results of 8 macrocystic cases were Stocker’s typeⅠ, the microcystic case was Stocker’s typeⅡ. Conclusion: The CT manifestations of CCAM had a certain characteristics, and might predict the pathological type. CT examination was useful for the preoperative diagnosis of CCAM.
2016 Vol. 27 (5): 341-344 [Abstract] ( 998 ) HTML (1 KB)  PDF  (0 KB)  ( 194 )
345 Evaluation of myocardial damage and its correlation with cardiac function in patients with pulmonary hypertension by myocardial delayed contrast enhancement MR imaging
YU Ya-nan, LU Qing-qing, HAN Yan, CUI Qian, YU Tie-lian, LI Dong
Objective: To assess the extent of myocardial damage and its impact on cardiac function in patients with pulmonary hypertension(PH) using myocardial delayed contrast enhancement(DCE) MR imaging. Methods: Sixty patients with PH were confirmed by cardiac catheterization and all patients underwent MR imaging, 8 males and 52 females, aged (39.9±12.5) years. Right ventricle(RV) and left ventricle(LV) volumes, ejection fraction(EF), stroke volume(SV), mass, fractional distance change from septum to free-wall(fractional-SFD), fractional tricuspid annulus apex distance change(fractional-TAAD), curvature of interventricular septum(CIVS), and curvature ratio(RC) were obtained by steady-state free precession sequence(FIESTA) images. RV and LV volumes, SV, mass were corrected by body surface area(BSA). Ventricular mass index(VMI) was the ratio of RVMM and LVMM. DCE images were post-processed for calculating DCE MM. Location and characteristics of myocardial DCE were also observed and analyzed. Independent Sample t-Test or Mann-Whitney U Test was used to compare the differences of ventricular function parameters in patients with and without DCE. Results: DCE was present in 49 patients(81.67%). DCE was confined to the RV insertion points(RVIPs) in 12 patients(24.49%), and extended into the interventricular septum(IVS) in 37 patients(75.51%). DCE was present both anterior and inferior in 43 patients(87.76%). DCE was limited to the mid-wall region of the ventricular myocardium. DCE MM was (3.83±1.93)g, 2.88%(0.25%~6.50%) of the total mass of both RV and LV. Compared with patients without DCE, RV ESVI and VMI of patients with DCE were significantly increased(P=0.040, 0.011), while RV EF, fractional-TAAD, CIVS and RC was significantly decreased(P=0.002, 0.001, 0.023, 0.001). Conclusion: Myocardial DCE can be used as a reference index to evaluate the severity of cardiac function damage in patients with PH.
2016 Vol. 27 (5): 345-348 [Abstract] ( 716 ) HTML (1 KB)  PDF  (0 KB)  ( 240 )
349 CT diagnosis of epiploic appendagitis
QIN Xing-ru, YAN Hao, REN Ying
Objective: To study the imaging features of epiploic appendagitis. Methods and Materials: Clinical and imaging data of 24 patients diagnosed as epiploic appendagitis from 2009 to 2012 were studied retrospectively. Location, size, shape, density, surrounding inflammation and change of adjacent bowel wall were analyzed. Results: All of the lesions were solitary, appearing as round or oval lesions abutting colon wall, with density of fat inside and density of soft tissue of the border. Inflammatory infiltration was seen around all of the lesions, but no thickening of adjacent bowel wall was found. Thickening and exudation of adjacent peritoneum was seen in 17 cases. Conclusion: Characteristic clinical and CT features of epiploic appendagitis can help to avoid incorrect treatment.
2016 Vol. 27 (5): 349-351 [Abstract] ( 830 ) HTML (1 KB)  PDF  (0 KB)  ( 174 )
352 Ultrasound assessment in the cure of infant acute intussusception with warm saline enema
BAI Yan-hong, LIANG Ming, TANG Feng-zhen, GUO Jian-kang, TANG Zhong-cai
Objective: To investigate the feasibility of ultrasound-guided warm saline enema therapy in infants with acute intussusception. Methods: The clinical data of patients with infant acute intussusception from Jan. 2010 to Dec. 2014 were collected and analyzed retrospectively． Patients were divided into operation and warm saline enema groups． Results: There were 92 cases of infant acute intussusception(50 males and 42 females, age ranging from 3 months to 8 years), 61 patients were cured with warm saline enema and 31 patients underwent surgery. The mean length, diameter and thickness of the intussusception were 3.54 cm, 1.78 cm and 0.36 cm respectively in the warm saline enema group, and 6.48 cm, 2.85 cm and 0.78 cm respectively in the operation group(P<0.001)． Multivariate regression analysis indicated that the “sleeve sign” length, “target ring sign” diameter and “sheath” thickness were independent influencing factors for the success of warm saline enema． ROC curve analysis indicated that the “sleeve sign” length≥4.5 cm, “target ring sign” diameter≥2.5 cm and “sheath” thickness≥0.5 cm of intussusception were optimal cutoff values to predict the need for surgery. Conclusion: The “sleeve sign” length<4.5 cm, “target ring sign” diameter<2.5 cm, and “sheath” thickness<0.5 cm predict the need for warm saline enema in pediatric patients with infant acute intussusception．
2016 Vol. 27 (5): 352-354 [Abstract] ( 641 ) HTML (1 KB)  PDF  (0 KB)  ( 186 )
355 Detection of the drug resistance of human colon cancer in mice with magnetic resonance diffusion-weighted imaging
XIE Qi1, YANG Yi-ming1, WU Min-yi1, ZHANG Ding-xuan1, LEI Zheng-xian1, ZHANG Jing2, XU Jin3, ZHONG Wei-de3
Objective: To investigate the possibilities in detecting the drug resistance of human colon cancer with MR diffusion-weighted imaging(MR-DWI). Methods: SW480(drug response) and SW480/5-FU(5-FU resistance) human colon cancer-bearing nude mice(five each group) were given MR-DWI examinations. Then these mouse models were sacrificed. Their tumors were removed for PKC, P-gp, MRP1 protein expression(Western Blot), and tissue sections(HE staining) was observed. ADCs of the tumor in tumor-bearing mice of two groups were analyzed in comparison with PKC, P-gp, MRP1 protein expression and changes in tissue sections. Results: The values of apparent diffusion coefficient(ADC) detected in the center and edge of the tumor in SW480 group were higher than those in SW480/5-FU group. There was statistical difference(P＜0.05) of ADC value in the edge of tumor between SW480 group and SW480/5-FU group, and there was no statistical difference(P＞0.05) of ADC value in the center of tumor between two groups. ADC value of tumor was negatively correlated with drug resistance. PKC, P-gp, MRP1 protein expression of SW480/5-FU group were significantly higher than that of SW480 group(P<0.05). Conclusions: MR-DWI ADC value change has the potential to help detection of colon cancer drug resistance with MR in vivo.
2016 Vol. 27 (5): 355-358 [Abstract] ( 687 ) HTML (1 KB)  PDF  (0 KB)  ( 258 )
359 The prenatal MRI features and diagnostic value of pernicious placenta previa complicated with placenta accreta
CHEN Feng-ying1, ZHANG Da-wei1, LIU Zheng-ping1, WANG Wen1, YANG Wei-chao1, WU Ren-hua2
Objective: To investigate the prenatal MRI features and diagnostic value of placenta accreta. Methods: The prenatal MRI findings and clinical and pathological data of 72 patients with pernicious placenta previa were retrospectively analyzed. The prenatal MRI imaging manifestations and its diagnostic value were evaluated. Results: ①The sensitivity and specificity of MRI in the diagnosis of placenta accreta, placenta increta and placenta percreta were 50% and 91.7%, 79.2% and 91.7%, 80% and 100%, respectively.②The sensitivity and specificity of MRI manifestations in the evaluation of placenta increta were 67.3% and 85%(loss of placental-myometrial interface), 65.4% and 75%(heterogeneous signal in placenta), 50% and 85%(abnormal placental vascularity), 40.4% and 95%(low signal bands on T2WI), 17.3% and 100%(abnormal uterine bulging), and 26.9% and 95%(“tents” shape change or nodular protuberance of the bladder wall). ③The depth of placenta increta was positively related with the volume and occurred probability of low signal bands on T2WI. Conclusion: MRI technique is of great value in diagnosis of placenta increta and percreta. But the sensitivity in diagnosis of placenta accreta is too low. The most useful signs of placental invasion are loss of placental-myometrial interface, abnormal placental vascularity, low signal bands on T2WI, abnormal uterine bulging, and “tents” shape change or nodular protuberance of the bladder wall. The larger size of low signal bands on T2WI, the deeper placental invasion would be.
2016 Vol. 27 (5): 359-362 [Abstract] ( 978 ) HTML (1 KB)  PDF  (0 KB)  ( 203 )
363 A study on left ventricular wall volume using intelligent spatiotemporal image correlation in normal fetuses
WANG Chao, XIE Li-mei
Objective: To explore the feasibility of iSTIC in evaluation of left ventricular wall volumes in normal fetuses. Methods: Real Time three-dimensional echocardiography were performed in 124 normal fetuses from 20 to 36 weeks gestation with Phillips iU22G4 ultrasonic diagnostic instrument. The images were analyzed by QLAB software with Stacked contours method for measuring left ventricular end-diastolic interior volume and peripheral volume. The different value between interior volume and peripheral volume was the left ventricular wall volume. The correlation between fetal left ventricular wall volume and gestational age was analyzed. The intraclass correlation coefficient(ICC) was used to evaluate the agreement of inter-observer and intra-observer. Results: The iSTIC volumes of 16 fetuses were excluded from the study because of the poor image quality. There was a significant correlation between left ventricular wall volume and gestational age(P<0.05). The reproducibility of intra-observer and inter-observer evaluated by ICC were better(ICC of intraobserver was 0.978, 95% CI: 0.947~0.991, ICC of interobserver was 0.927, 95% CI: 0.825~0.970). Conclusion: The iSTIC technique is a simple and feasible modality to determine the fetal left ventricular wall volumes in normal fetuses. This method may become a new way for evaluating fetal heart development.
2016 Vol. 27 (5): 363-366 [Abstract] ( 607 ) HTML (1 KB)  PDF  (0 KB)  ( 199 )
367 Application of PET imaging in the diagnosis of Alzheimer’s disease
TAO Lin, ZHENG Dong-ming
Alzheimer’s disease is the most common cause of dementia in the current elderly population． Molecular imaging plays an important role in the basic and clinical research of Alzheimer’s disease. PET can detect pathophysiological changes in Alzheimer’s disease with different radiotracers． This paper will focus on evaluating the value of 18F-FDG and amyloid PET imaging in Alzheimer’s disease, and describe in detail the role of PET imaging in the research of etiology, early diagnosis, differential diagnosis, prognosis and medical treatment of Alzheimer’s disease．
2016 Vol. 27 (5): 367-369 [Abstract] ( 680 ) HTML (1 KB)  PDF  (0 KB)  ( 176 )
370 Research progress of MR neuroimaging in lumbosacral nerve root compression caused by lumbar disc herniation
ZENG Cheng, HAN Fu-gang
Lumbosacral nerve roots compression caused by lumbar discherniation is the common reason for lower limbs dysfunction, paresthesia and lower limbs pain, at present more and more investigations have indicated that mechanical compression and inflammatory stimuli are the pathological basis of lower back pain and lower limbs pain. Doctors usually detect the locations of compressed nerve roots and judge the type of lumbar discherniation by signs and Medical imaging. MRI has been widely used in lumbosacral nerve roots because of its non-invasiveness, no radiation, high resolution for soft tissue, multi-plane imaging and multi-parameter imaging. This review summarizes the main imaging techniques of MR neuroimaging, especially the DTI.
2016 Vol. 27 (5): 370-372 [Abstract] ( 815 ) HTML (1 KB)  PDF  (0 KB)  ( 180 )
373 MRI diagnosis of acute intermittent porphyria complicated with nervous system damage and#br# literature review: report of one case
LI Yang1, LI Hua2, LIU Yan-bo1
2016 Vol. 27 (5): 373-374 [Abstract] ( 560 ) HTML (1 KB)  PDF  (0 KB)  ( 205 )
374 Tissue replacement plexiform neurofibroma: report of one case and literature review
ZHANG Ying-jun1, YI Wen-zhong2, LIU Zuo-guo2, TANG Zhi1, ZHANG Jie2, WU Jia-li2, FENG Min1
2016 Vol. 27 (5): 374-376 [Abstract] ( 571 ) HTML (1 KB)  PDF  (0 KB)  ( 190 )
376 Splenic myelolipoma: report of one case
JIANG Min-rui, DENG Xiao-juan, CHENG Cheng, LI Ran, WANG Yi
2016 Vol. 27 (5): 376-377 [Abstract] ( 877 ) HTML (1 KB)  PDF  (0 KB)  ( 194 )
377 18F-FDG PET/CT imaging of primary mediastinal seminoma complicated with#br# immature teratoma: report of one case
LIU Yi, LI Ya-ming
2016 Vol. 27 (5): 377-379 [Abstract] ( 800 ) HTML (1 KB)  PDF  (0 KB)  ( 190 )
379 Cleidocranial dysplasia complicated with congenital coxa vara: report of one case
WANG De-hua, LAN Jun, XIAO Gang
2016 Vol. 27 (5): 379-380 [Abstract] ( 583 ) HTML (1 KB)  PDF  (0 KB)  ( 145 )
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