on on PWI. Conclusions MRI can demonstrate hydatid cysts in vertebra, spinal canal, paravertebral and neighboring soft tissue. MRI is a valuable tool in the diagnosis and treatment planning of hydatid disease of the spine.

Objective To evaluate the application of diffusion-weighted MR imaging in hepatic echinococcosis.Methods Diffusion-weighted MR imaging and measurement of apparent diffusion coefficient (ADC)were performed in 23 patients with 30 hepatic echinococcosis(cystic echinococcosis 24, alveolaris echinococcosis 6).Results The mean ADC values of cystic echinococcosis, alveolaris echinococcosis and normal liver were (3.50?0.35)?10 -3 mm2/s,(2.22?0.22)?10 -3 mm2/s and (1.41?0.09)?10 -3 mm2/s respectively.The difference between the mean ADC values was significant(?

Objective To study the characteristic findings of brain echinococcosis on MRI. Methods The MRI findings of 18 patients with pathologically confirmed brain echinococcosis were retrospectively reviewed.Results Among the patients.there were 9 cases of cystic echinococcosis and 9 cases of alveolar echinococcosis.In cystic echinococeosis,MRI revealed homogeneously hypointensity on T1WI and hyperintensity on T2WI,while it showed low signal intensity inside the cysts on FLAJR and DWI. In 6 cases of cystic echinococcosis, no edema was detected surrounding the lesions,while edema resulting from cyst rupture was found in 3 cases.The cystic walls were visible in 6 csses, obscure in 3 cases.The ruptured hydatid cysts in 3 cases showed slight ring enhancement.Alveolar echinococcosis appeared as multiple lesions with isointensity on T1WI and hypointensity on T2WI,surrounded by vasogenic edema.The "charcoal-like"hypointensity and innumerous hyperintense bubbles of 1-10 mm in diameter inside the lesions on T2-weighted MR images were characteristic for lesions of alveolar echinococcosis.The lesions revealed hypointensity on DWI and showed irregular ring enhancement after injection of Gd-DTPA. Perfusion-weighted MR imaging revealed low relative cerebral blood volume.Conclusion MRI can demonstrate lesions of brain echinococcosis accurately due to its advantages of multiorientation and multiparameter.It is clinically valuable.

Objective To analyze the MRI features of fibrocystic breast disease (FBD). Methods 39 patients with pathologically proven FBD were retrospectively reviewed. The imaging protocol consisted of pro-contrast imagings and bilateral breast volume im-aging for breast assessme NT(VIBRANT). MRI features were interpreted based on the morphologic and enhancement kinetic de-scriptors defined on ACR DIRADS-MRI lexicon. Results There were 3 types on ACR BI-RADS-MRI lexicon in FBD,including 13 focal mass-type showing malignant enhancement kinetic pattern mostly;15 cyst-type with non-enhancement or mild enhance-ment,of them,1 case with periductal mastiffs showing strong enhancement and rapid up-slope and wash-out mimicking a breast cancer. 6 non-mass type usually showing benign enhancement kinetic pattern. In 5 patients,MRI did not show definite abnormal evi-dence. Conclusion MRI is of significant value in diagnosing FBD.

Objective To evaluate whether the functional MRI could be used to reflect the change of angiogenesis after drug treat-ment,and obtain the related semi quantitative and quantitative parameters by dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI).Methods The subcutaneous transplantation colorectal cancer were constructed in 20 nude mice,which were treated with Xiaoaifeimi.The transplanted tumor microvascular density,VEGF and PCNA were monitored.The therapeutic effect and MRI monitoring results were evaluated by combining DCE-MRI with the pharmacokinetic model.The semi quantitative and quantitative parameters were obtained for evaluating the effection of medicine.Half of nude mice were sacrificed to obtain the immunohistochem-ical staining.Correlation between pathological findings and parameters were analyzed.Results Compared to the control group,hu-man colon HT-29 cell proliferation rate was significantly decreased (44.87%)(P <0.05),and the apoptosis rate of HT-29 cells was increased 2.45 times (P <0.05)after Uyghur medicine treatment.The correlation between pathological examination and DCE-MRI parameters showed that Ktrans value and Kep were positively correlated with VEGF,MVD and PCNA (P <0.05).Conclusion A good relationship is showed between immunohistochemistry and DCE-MRI quantitative parameters in Uygur drug treating human colon cancer mice.

Objective To discuss the value of the multi-b-value diffusion weighted imaging (DWI)in diagnosis of liver tuberculosis,abscess and atypical hydatid disease.Methods 23 patients with different liver lesions including abscess in 1 1,tuberculosis in 3 and alveolar hydatid in 9 were scanned with conventional MRI and multi-b-value DWI,and the imaging results were retrospectively analyzed.The ADC1 0b maps with 10 b values,three ADClow ones with low b values of 0 s/mm2 ,50 s/mm2 and 100 s/mm2 ,three ADChigh ones with high b values of 500 s/mm2 ,750 s/mm2 and 1 000 s/mm2 were gotten respectively.The ADCperf value was defined as a difference between ADClow and ADChigh values.Two regions of interest (ROI)with the same size were drawn in the liquefied region and mar-ginal area of the mass.The ADC values of ADClow ,ADChigh ,ADCperf and ADC1 0b maps were calculated and analyzed.Differences in b value and region among the three liver diseases were compared.Results The differences in ADC10b and ADChigh values between atypical liver hydatid and liver abscess in the liquefied region and marginal area were significant (P <0.05);the differences in ADC10b and ADCperf val-ues in the marginal area among liver tuberculosis,abscess and atypical hydatid were significant (P <0.05).The differences in ADCperf value in the liquefied region between thydatid disease and abscess,and in ADChigh value in marginal area between tuberculosis and abscess were not statistically significant (P >0.05).No differences in the ADClow value were found in both areas of three lesions (P >0.05). Conclusion Multi-b-value DWI and ADC maps and ADC values can provide valuable information in diagnosis and differentiation of liver tuberculosis,abscess and atypical hydatid disease.Different ADC values play more important role in the diagnosis of liver diseases.

Objective To investigate the value of dual-source CT perfusion imaging in evaluation of liver fibrosis stage.Methods Liver fibrosis models were established with 35 rabbits (experimental group)which were intraperitoneally injected with carbon tetra-chloride.Meanwhile,other 5 rabbits were regarded as control group which were intraperitoneally inj eced with physiological saline.7 rabbits of experimental group and 1 of control group were undergone dual-source CT perfusion scan at 4,6,8,10,12 weeks respec-tively.Arterial liver perfusion (ALP),portal venous perfusion (PVP),total hepatic perfusion (THP),hepatic perfusion index (HPI)were recorded,and staging of liver fibrosis were assessed by pathological method.Results With the increase of liver fibrosis degree,HPI showed an upward trend,whereas PVP was opposite.HPIs of S2,S3 and S4 stage were significantly different com-pared to that of control group respectively.The differences of HPI between S3,S4 stage to S0 and S1 stage were significant.PVP between S2,S3,S4 stage to S0 stage and S1 stage were also significant different.Conclusion HPI and PVP can reflect the perfu-sion changes of liver fibrosis stages.Combination of HPI and PVP may help the diagnosis of S2,S3 or S4 stage of liver fibrosis.

Objective To discuss the safety and advantages of prone-straddle position applied in transvaginal hysteromyomectomy of the posterior wall of the uterus. Methods The clinical data of patients who were admitted into our hospital from March 2013 to Janaury 2015 and received transvaginal hysteromyomectomy were retrospectively analyzed. They were divided into group A ( prone-straddle position, 30 cases) and group B (traditional lithotomy position,24 cases). The exposure of operative field, convenience of operation, time of the placement, time of operation, patient satisfaction, as well as patients’ heart rate, blood pressure, and oxyhemoglobin saturation were observed and ana-lyzed. Results Compared with the lithotomy position, there were significant differences in the time of the placement and the time of opera-tion in the patients treated by prone-straddle position. The patients with prone-straddle position cooperated well, and there was no obvious discomfort. Their vital signs were stable during the operation. The operative field during prone-straddle position exposed better and it was more convenient which make the operation became easier for both the operators and nurses. Conclusion Prone-straddle position applied in transvaginal hysteromyomectomy of the posterior wall of the uterus is safe and practicable, and it is valuable for clinical application.

Purpose To investigate the clinical value of MR PROSET technique in showing and diagnosing in lumbarsacral nerve root diseases.Materials and Methods Conventional MRI sequence and PROSET sequence coronal images were performed in lumbosacral nerve roots of 15 healthy volunteers and 47 low back pain patients,each case performed 3D maximum intensity projection (3D MIP) post-processed.Spinal nerveroots were observed.Results The PROSET could show dura,dura sheath,spinal nerveroot,ganlias,segments of the nerves posterior to the ganglions well and could be observed from multiple aspects by the 3D MIP.Among the 47 cases of luber nerve root disease,PROSET could show the level of the invasion and compression to the ganglias.Conclusion According to the PROSET technique and conventional MRI picture,can provide the satisfied proof to the diagnosis of lumbosacral nerve root diseases.

0.05). Conclusion Comparedwith DSA and operation,there is excellent correlation among 3D contrast-enhanced moving-bed MRA,DSA and operation.MRA canaccurately and entirely assess occlusive disease of the arteries of the lower extremity.It is a ono-invasive,reliable and potential newtechnique.