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Objective:To explore the MRI features of cerebral amyloid angiopathy-related inflammation (CAA-ri).Methods:The clinical and imaging data of 12 patients with CAA-ri diagnosed in Affiliated Guizhou Aviation Industry Cor Ltd No 300 Hospital of Zunyi Medical University (9 cases), Xingyi People′s Hospital (2 cases) and Anshun people′s Hospital (1 case) from June 2013 to June 2020 were analyzed retrospectively. There were 3 females and 9 males, aged from 57 to 89 years old, with an average age of 71±10 years. The twelve patients included 5 cases with probable CAA-ri and 7 cases with possible CAA-ri. The duration of the disease ranged from 30 minutes to 2 years. One patient has ApoE ε4/ε4 gene overexpressed. All the 12 patients underwent MRI, including susceptibility weighted imaging in 12 cases, DWI in 10 cases, contrast enhanced MRI (CE-MRI) in 9 cases, MRS in 3 cases, MRA in 7 cases, and perfusion-weighted imaging in 1 case.Results:Imaging features of CAA-ri included encephalopathic, tumoral, classical cerebral amyloid angiopathy(CAA) manifestations. Twelve cases of encephalopathic manifestations showed patchy white matter hyperintensity (WMH) involving U-shaped fibers on T 2 weighted fluid-attenuated inversion recovery sequence (FLAIR), usually asymmetric,with various degree of mass effect, no diffusion restriction on DWI and no enhancement on CE-MRI. One case showed a single tumoral lesion with irregular enhancement on CE-MRI. The classic CAA findings included hemorrhagic lesions (microhemorrhage in 8 cases, lobar hemorrhage in 6 cases, subarachnoid hemorrhage in 3 cases, iron deposition on the brain surface in 7 cases) and ischemic lesions (microinfarction in 1 case, enlarged perivascular space and interlobar space in 4 cases). Follow-up showed lesions absorption and/or new lesion formation in 5 cases. Conclusions:The MRI features of CAA-ri are mainly patchy WMH involving U-shaped fibers on T 2 FLAIR, usually asymmetric, with wandering and alternating features, and inconsistency with clinical manifestations.
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sequential treatment of advanced prostate cancer is a current research hotspot. One patient with advanced prostate cancer with multiple metastases at initial diagnosis in our institution was sequentially treated with endocrine, abiraterone, polymerase inhibitor, and enzalutamide with an overall survival of 35 months.
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Objective To analyze the MRI findings of spinal intramedullary tuberculomas and the related literature was reviewed. Methods A retrospective study of 5 patients with intramedullary tuberculoma proved by clinical and radiological evidences was undertaken.Both T1-and T2-weighted images were obtained along with the postcontrast T1 WI.The locations,signal intensities,patterns of enhancement and morphology of the tuberculomas were observed.Results A tuberculoma in one patient was found in cervical spinal cord with slight hypointensity and nodular enhancement on T1 WI and hypointensity on T2 WI.Those in three patients were found in inferior thoracic spinal cord with typical “target sign”on T2 WI and rim-enhancement on postcontrast T1 WI,and the tuberculomas were ovoid along the long axis of spinal cord on sagittal images.A miliary tuberculoma in thoracic spinal cord in one of these three patients was found which could not be showed on plain MRI.The tuberculomas in last patient was located in conus terminalis with hypointensity and rim enhancement on T1 WI and hypointensity on T2 WI.Conclusion The MRI findings of spinal intramedullary tuberculoma are variable,and their characteristic manifestations include hypointensity or “target sign”on T2 WI,rim enhancement on postcontrast T1 WI along the long axis of spinal cord.
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Liver cancer stem cells (LCSC)play the critical role in hepatocellular carcinoma development and maintenance. They are generally dormant or slowly cycling tumor cells that have the ability to reconstitute tumors. LCSC associate closely with tumor resistance to chemo/radiation therapy , tumor relapse and metastasis, and can be identified and separated with some special surface markers from hepatocellular carcinoma, such as CD133, CD90, CD44, CD24 and EpCAM to investigate the biological behaviors of them. Early studies showed that these markers can be regarded as special surface markers of liver cancer stem cells. Recent studies found that aminopeptidase N (APN,CD13+)cells in hepatocellular carcinoma have biological characteristics of stem cells and demonstrated that CD13 is a marker for semiquiescent CSC in human liver cancer cell lines and clinical samples and that targeting these cells might provide a way to treat this disease. In this review,we introduce the structure and the main function of CD13,liver cancer stem cells source and identification,CD13 + CSC in hepatocellular carcinoma and combination therapy in the treatment of liver cancer.
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Objective To investigate the diagnosis and therapy of testicular germ cell tumour.Methods The clinical data of 45 cases that were confirmed by pathology testicular germ cell tumour were retrospectively analyzed.Results All 45 cases were resected successfully.Among of them,28 cases seminoma,3 cases teratoma,2 cases embryoma,2 cases choriocarcinoma,4 cases mixed testicular germ cell tumour,5 cases yolk sac tumor,1 case spermatocytic seminoma.The treatment method was selected by pathology results.Eleven cases were lost,34 cases were followed up for 3 month to 5 years,25 cases seminoma,9 cases non-seminoma,5 cases were died.Conclusion Surgical resection and adjuvant chemotherapy are important factors for testicula disease.
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ObjectiveTo investigate the value of combined digital mammography and Color Doppler Mammasonography in the diagnosis of the breast carcinoma with ROC analysis.MethodsFifty female patients with breast carcinoma and fifty female patients with breast benign lesions confirmed by means of surgery and histopathological examinations were studied.All patients were examined by Digital Mammagraphy and Color Doppler Mammasonography.Images of all patients were sorted and divided into three groups,Digital radiographs of all patients was the first group,and the second group was Color Doppler photographs,and the third was included the above two photographs.Each group was evaluated respectively by three radiologists independently.The diagnostic result of breast carcinoma or benign lesions were investigated with a five point confidence-rating scale:(1)definitely positive;(2)probably positive;(3)indeterminate;(4)probably negative,and(5)definitely negative.ROC analysis was made with SPSS 11.0 software.The differences of the area under the curve for each group was made by Z test.ResultsThe average number of breast carcinoma diagnosed by three radiologists with digital mammography,Color Doppler Mammasonogaraphy and both of them was 42,38,and 48,respectively;and the average number of breast benign lesions was 40,43,and 47,respectively.The sensitivity and specificity for digital mammography was 84%(42/50),80%(40/50),and they were 76%(38/50),86%(43/50)for Color Doppler;and 96%(48/50),94%(47/50)for two modes combination.ROC analysis indicated that the average area under the curve was 0.852 for Digital Mammagraphy,0.825 for Color Doppler,and 0.952 for both combined.For digital mammography combined with Color Doppler Mammasono-garaphy on diagnosis breast carcinoma,the area under the curve(Az)was significally larger than that for digital mammography(Z1=2.183,P＜0.01),and also larger than that for Color Doppler Mammasono-garaphy(Z2=2.581,P＜0.01), respectively.Conclusions Among three medical imaging modes on diagnosing breast carcinoma,the diagnostic value of digital mammography combined with Color Doppler Mammasono-garaphy was the highest. It was helpful on detecting and diagnosing breast carcinoma early.
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<p><b>OBJECTIVE</b>To determine a network solution to meet the network requirements of the heavy data flow, load balance, and potential network storms from expansion of picture archiving and communication system (PACS) application.</p><p><b>METHODS</b>Intel Netstructure 480T Giga Switch was used as the main switch and connected to each building by fiber channel at 1 Giga speed to archive 100 MB/s to each port. At the same time, the in-dependence of the original network construction was physically kept. The layer 3 and 4 switchers were used as load balance to reduce the heavy load of the network, and all the cabling for PACS used the super CAT5 along with the Intel NetStructure 1520 to prepare for potential network storms.</p><p><b>RESULTS</b>An advanced intranet was set up to fully meet the high standard requirement of the PACS. The foundation for upgrading the whole network system to 1 Giga application was built to achieve sharing and transmission of images, information, and patient data within the hospital. The base was established for the standardized management of the hospital.</p><p><b>CONCLUSION</b>Good planning is the first step in setting up PACS, and the equipment forms the necessary platform to run PACS and all kinds of hospital information system (HIS). The networking construction is the foundation of e-hospital.</p>
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Computer Communication Networks , Equipment Design , Hospital Information Systems , Radiology Information SystemsABSTRACT
<p><b>OBJECTIVE</b>To investigate the set-up and preliminary performance of a digital radiology conference system and its characteristics.</p><p><b>METHODS</b>The imaging system included a dual-screen image-text workstation with a Matrox G450 demonstration dual-head card, two multimedia projectors, a large screen, and a line-pair and grey scale test card. Patient information on radiology information system (RIS) and images on picture archiving and communication system (PACS) were fetched with GE Radworks software based on Intranet and PACS. The fetching velocity and resolution and grey scale of the images were measured.</p><p><b>RESULTS</b>Patient information in the form of texts and images were demonstrated successfully on two screens with Matrox G450 demonstration dual-head card and switched rapidly between text-image two-screen and image two-screen. The image fetching velocity was fast, the resolution was high, and the grey scale was good.</p><p><b>CONCLUSION</b>The digital conference radiology system is good, and should be popularized.</p>
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Audiovisual Aids , Radiographic Image Enhancement , Radiology Information Systems , Signal Processing, Computer-AssistedABSTRACT
1.98, P0.05). Conclusion Mono-side carotid sinus nerve block has no significant influence on hemodynamics of normal rabbits, but has reliable preventional and therapeutic role on hemodynamics instability caused by carotid sinus stimulation.
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Objective To explore the causes and preventive measures of symptomatic intracranial hemorrhage in 217 patients with acute cerebral ischemic stroke treated with local intra-arterial urokinase. Methods From February1999 to June 2004, 217 patients were treated for acute ischemic stroke with local intra-arterial urokinase in our hospital. Factors associated with symptomatic intracranial hemorrhage of intra-arterial thrombolysis were analyzed by Stepwise logistic regression to identify some factors relating the prediction symptomatic intracranial hemorrhage. Results Symptomatic intracranial hemorrhage occurred in 8 cases (3.7%). Predictors of the symptomatic intracranial hemorrhage were the elevated systolic blood pressure before therapy (odds ratio, 1.096; 95% CI, 1.006 to 1.194) and urokinase (UK) treatment (odds ratio , 1.068; 95% CL, 1.053 to 1.247). Risk of secondary symptomatic intracranial hemorrhage was increased with elevated systolic blood pressure. Other factors like age, initial treating time, NIHSS, diabetes and collateral circulation did not predict the symptomatic intracranial hemorrhage respectively. Conclusions Predictors of symptomatic intracranial hemorrhage after local intra-arterial infusion of urokinase for acute ischemic stroke were the elevated systolic blood pressure before therapy and urokinase (UK) treatment.
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Objective To evaluate the clinical efficacy of local intra-arterial thrombolysis (LIT) with urokinase in patients with acute ischemic stroke.Methods One hundred and sixty two patients with acute ischemic stroke were treated with LIT by using urokinase and relationship of reconalization for different occluded arteries with the Glasgow outcome scale (GOS) scores three months later was analyzed. Results Angiography showed occlusion of the cerebral artery in 162 patients, among which 119(73.5%) patients showed the sites in the internal carotid artery system, with 27 occlusions in the internal carotid artery (ICA)trunk, 63(38.89%) in the middle cerebral artery (MCA)and 29(17.9%) in the anterior cerebral artery (ACA), and the remaining 43(26.5%)patients of vertebrobasilar artery (VBA); successful recanalization was achieved in 103 (63.58%)patients, including 11 (40.7%), 49(77.8%), 20(69.0%) and 23(53.3%), respectively, after intraarterial infusion of urokinase. Unsuccessful recanalization occurred in 59patients (36.42%). Followed up for 90 days, 90 (55.6%) patients obtained a good outcome; 72(44.44%) had poor prognosis including 20(12.35%) deaths. 8 patients associated with hemorrhage (4.9%) 73 with reperfusion injury (45.1%) and 5 arterial re-occlusion (3.1%). Based on statistic analysis, ICA trunk and VBA had low ratio of successful recanalization with poor clinic prognosis MCA and ACA possessed high ratio of successful recanalization and good clinic outcomes. There was a significant relationship between arterial recanalization rate and clinic prognosis (r=0.86).Conclusions Successful recanalization of cerebral occlusive artery by using intra-arterial thrombolysis could improve clinic prognosis in patients with acute ischemic stroke. Clinical prognosis has a significant relationship with both initial treatment time and arterial recanalization rate.
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Objective To investigate the image characteristics of Synovial Sarcoma, and improve the diagnostic accuracy. Methods The clinical materials and image findings of synovial sarcomas proved by pathology and were retrospectively analyzed in 13 cases.Results ①Most synovial sarcomas located in close proximity to joints, especially large joints of lower limbs . ②The mass diameter was usually more than 5cm ,and most masses presented moderate density, and some with calcification inside it on X-ray films. ③Most masses density was not homogeneous and lower than that of the muscle on CT, the demarcation was clear or not. ④On T2WI /STIR of MRI, most tumours presented slightly hyperintense "cobble" nodules , with hypointense septa among the nodules. After contrast, the nodules were unenhanced or enhanced slightly,the septa were markedly enhanced. Conclusion Some image features of synovial sarcoma ,especially on MRI, are helpful for the diagnosis of it.
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Objective To enhance the function of picture archiving and communication systems (PACS) and the efficiency of medical imaging by adjusting dataflow. Methods About 9500 examinations consecutive data in July of 2003 were analysed and and followed. The dataflow was adjusted by adding digital radiology servers and temporal servers. Results The network bottleneck was resolved and the system load balanced, then the function of the system was enhanced. The secure running of the system was ensured in condition of urgency or increasing of patients and image data. Conclusion Adjustment of dataflow in PACS makes full use of all resources, reduces unnecessary time-wasting , further improves the working efficiency in our department.
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Objective Toevaluatetheradiologicfindingsanditsclinicaluseinmassiveosteolysis (MOL) .Methods FourcasesofMOLwereretrospectivelyanalyzed .X rayexaminationwasperformedinfour, CTintwo ,andMRIinone .Results (1 )Singleskeletallesionwasdemonstratedinthreecases ,andmultiple lesionsinone .(2 )OnX ray ,tubebonelesionwasshowedastaperingintwo ,butbonedefectorbone disappearingwasfoundintheflatbonedisease .Onecasealsoassociatedwithchylothorax .(3)OnCT ,flatbone lesionhadataperingmargin ,riblesionswereshowedasflattenandirregularsurfacewithcorticalorsubcortical bonedefect.Surroundingsofttissueofskeletallesionswasatrophy .(4)NormalMRIsignalintensityofbone marrowdisappearedintwoskeletallesionsandhadalongT1andlongT2 signalintensitychanges .Conclusion X rayexaminationistheessentialmethodforMOL ,CTandMRIarecomplementaryone .
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Objective To assess the applied value of proton magnetic resonance spectroscopy(1HMRS) in evaluating the canine model of acute ischemic cerebral damage and intra-arterial thrombolytic therapy.Methods 18 adult hybrid canines were all occluded with self-thromboses and randomly divided into 6 groups(three canines in each group),group B1,B3,B6,B9 and B12 were given intra-arterial thrombolytic therapy with urokinase(10,000IU/kg) at 1.5,3.5,6.5,9.5 and 12.5 hours after embolism respectively.The axial diffusion-weighted images(DWI) and 1HMRS were performed in all canines at 1,3,6,9,12 and 24 hours after embolism respectively.24 hours after embolism,one canine in every group was randomly selected to be executed pathologic examination.Results NAA,Cho and Cr decreased in non-thrombolytic group,specially NAA in the first 6 hours.Cho and Cr decreased a little,but they were not so significant compared with NAA.The relative value of Lac was persistent elevation within 24 hours.In thrombolytic group,the degree of elevation of Lac was significantly smaller than in group A(P