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Objective To investigate the application of wall shear stress (WSS) in the carotid sinus of type 2 diabetes mellitus (T2DM) patients,and analyze the spatial distribution of WSS with contrast enhanced flow field (CEFF) quantita tive visualization analysis software.Methods Totally 47 T2DM patients and 25 healthy subjects were investigated.According to the intima-media thickness (IMT) of common carotid artery (CCA),the T2DM patients were divided into IMT normal group (n=21) and IMT thickening group (n=26).WSS in the carotid sinus was calculated by CEFF analysis soft ware,the corresponding spatial distribution maps of WSS were designed.WSS of the posterior wall of internal carotid artery (ICA) was recorded and statistical analysis.Results Both in the carotid sinus of healthy subjects and T2DM patients,there were two low WSS regions and one high WSS region.There were a large region of low WSS at the posterior wall of CCA and ICA,a small region of low WSS at the anterior wall of CCA,and a high WSS region at the anterior wall of ICA.The WSS at the posterior wall of ICA both in the IMT normal group [(3.39 ± 0.60)dynes/cm2] and IMT thickening group [(2.58±0.46)dynes/cm2] were significantly lower than that in control group ([3.74±0.53]dynes/cm2,both P＜0.05).WSS in IMT thickening group was lower than that in IMT normal group (P＜0.05).Conclusion CEFF quantitative visu alization analysis might constitute an approach to assess the presence of early-stage arteriosclerosis by measuring the WSS in the carotid sinus.
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Objective To explore the value of diffusion weighted imaging (DWI)as a quantitative analysis tool for chronic cervical spondylotic myelopathy (CSM)with 3.0T MRI.Methods Cervical routine MR T2-weighted imaging(T2 WI)and diffusion weighted imaging were performed in 38 patients with cervical spondylotic myelopathy (CSM group)and 20 healthy volunteers (control group),and sagittal image of apparent diffusion coefficient (ADC)was reconstructed.The number of high T2 signal of the spinal cord were calculated in both healthy volunteers and CSM patients.The ADC values of CSM groups were measured in C3,T1 -C2 level and the compression or abnormal signal parts of the spinal cord;the control group measured C3、C4-C6 and T1 -T2 level in the spinal cord.Results There were 3 cases,1 case,6 cases and 8 cases high T2 signals in CSM patients from Ⅰ to Ⅳ levels,while there were 2 cases show high T2 signals in control group,respectively.The mean ADC values of the compression part were gradual-ly increased in CSM group from Ⅰ to Ⅳ level.There were significant differences of the mean ADC values of compression part be-tween the control group,CSMⅠ-Ⅱ level and the CSM Ⅳ level.Conclusion From our study,the change of ADC value of spine cord occured earlier than the change of signal in CSM patients.Therefore,the ADC value of spine cord might reflect the degree of spinal cord compression from CSM patients.
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Objective To analyze proton MR spectroscopy (1H-MRS) characteristics of kidney in vivo, and to investigate the changes and applications of metabolites of kidney on 3.0T MR. Methods Fifteen patients with renal cell carcinoma and 50 healthy volunteers underwent single-voxel PRESS sequence MR scan on 3.0T scanner. Results Satisfied spectra of 13 patients and 48 volunteers were obtained. There were four main groups resonance peak: cholesterol and the unsaturated parts of the olefinic region of fatty acids (Chol+Unsat), water, choline metabolites (Cho) and lipids (Lip). The ratio of the Chol+Unsat to Lip was 5-fold lower in renal cell carcinomas group than that in contrast group (F=4.764, P=0.04). Conclusion A number of chemical compounds pertaining to metabolism in kidney can be quantitative analyzed, which may offer assistance for diagnosis of renal cell carcinoma.
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Objective To evaluate the category of the variations on bilateral renal artery and clinical significance with 64-slice spiral CT angiography. Methods CT angiography of 250 patients were retrospectively analyzed. The variations on bilateral renal artery were observed and classified. Results According to the number of the main renal artery, the anatomy of renal artery was classified and typed in details. The incidence of the variations on renal artery in the patients and kidneys was 39.20% (98/250) and 22.80% (114/500), respectively. The incidence of early branch of the main renal artery and accessory renal artery was 9.60% (48/500) and 11.80% (59/500), respectively. No statistical difference of variation incidence was found between male and female, nor between left and right kidneys. The incidence of unilateral and bilateral variations on renal artery was 32.80% (82/250) and 6.40% (16/250), respectively, and the combinations of the latter were multiform. Conclusion Anatomical variations on renal artery can be showed clearly with 64-slice spiral CT angiography. Variations on bilateral renal artery are important to select the donor in case of renal transplantation.
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Objective To evaluate the value of multislice spiral CT in preoperative staging of bladder carcinoma.Methods Eighty-two patients(78 males and 4 females)with pathologically proved bladder carcinoma and the radiology materials were retrospectively analyzed.All the diagnosis results were compared with the results of surgical pathology.Results The location accuracy and qualitation accuracy in the diagnosis of bladder carcinoma with spiral CT WaS 78.0%(64/82)and 93.9%(77/82)respectively.Compared with the results of surgical pathology,the accuracy of judgement in bladder surrounding involvement,lymph node metastasis and surrounding organ involvement with CT was 90.2%(74/82),96.3%(79/82)and 89.0%(73/82),respectively.The CT staging of bladder carcinoma was positively correlated to that of surgical pathology.Conclusions Spiral CT has high value in the diagnosis of bladder carcinoma.It could be adopted as a conventional and main examination of bladder carcinoma before operation.
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Objective To assess the CT manifestation an d its diagnostic value for renal milk of calcium (RMC). Methods Conventional CT examination was made for 14 patients of RMC and the imag es obtained were analyzed. Results CT clearly displayed the whole view of milky calcium cyst and its "half-moon sign". In 4 cases,th e half-moon high density formed by milk of calcium always located in the lowest part of the lesion with change of the body's position. All the lesions are unil ateral and their average diameter is 2.4 cm. Out of 14 patients, 13 are renal cy st type and 1 hydronephrosis type. Conclusions CT can di splay characteristic changes of RMC more clearly and distinguish it with other d iseases more reliably. CT can definitely discriminate types of RMC and provide more reliable pathologic and anatomic data.
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The aim of the experimental study is to investigate shortterm toxicity of an initial domestic Methotrexate microspheres(MTX-ms)by hepatic arterial infusion in rats,provide some experimental bases for clinic interventional treatment of liver carcinoma with this new chemoembolization agent.Compareing with control group and MTX group, MTX-ms of largedoses could result in temporal rise of GPT and AKP,deterioration or necroses of animal's liver at different degrees,12 days later a number of microspheres could still be found in the small arteries of the necrotizing area.No pathological changes related to microsphere could be found in other main organs(heart,spleen,lung and kidney).Results suggested that chemoembolization effect of MTX-ms is relatively strong;for effectively oc- cluding blood flow of hepatic arteries on the level of small arteries.Meanwhile MTX-ms oc- clud blood supply of liver carcinoma,they may also cause damages of normal liver tissue. Clinically more attention ought to be paid to the dosage of MTX1 microspheres and thus avoid the overflow of more microspheres to the normal liver tissue causing damage.
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Objective To introduce the applied value of Soap-Bubble reformatting and quantitative analysis of coronary MRA.Methods Reformatting and quantitative coronary of 3D coronary MRA were performed in twenty cases by using Soap-Bubble visualization following computer-assisted image segmentation respectively.The average vessel length,diameter and sharpness of coronary vessel can be measured.The imaging of coronary vessel was quantitative analyzed.Results 3D coronary MRA was successfully completed in 20 cases.The average vessel length of RCA /LM+LAD/LCX was(111?31) mm/(84?14) mm/(48?12) mm.The average vessel diameter of RCA /LM+LAD/LCX was(3.0?0.4 mm)/(2.9?0.3) mm/(2.4?0.2) mm.The sharpness of RCA /LM+LAD/LCX was(44?13)%/(43?15)%/(31?18)%.Conclusion Soap-Bubble enables the simultaneous display of multiple coronary segments in one 2D representation.The coronary vessel can be quantitative analyzed.