Objective To assess the role of dynamic-enhanced MR angiography (MRA) by comparing with DSA and CT arterial portography (CTAP).Methods Sixteen patients with liver diseases (mainly HCC) were included in the study. All patients underwent dynamic MRI of the liver using SENSE, digital subtraction angiography (DSA) and CTAP within two-week. MRA was reconstructed from raw data. The arterial phase of the modified MRA was compared with DSA for the evaluation of hepatic arteries and the portal phase compared with CTAP. In dynamic MRI, a fixed dosage (20 ml) of contrast medium and scan timing were used. Results The main branches and variations of the hepatic arterial system were well displayed on the dynamic-enhanced MRA, although the distant intrahepatic branches were showed poorly. Portal veins on MRV were showed as well as or even superiorly to CTAP. In addition, the inferior vena cava (IVC) was well demonstrated on MRV in most cases. MRV revealed 1 vascular variation which was not found on DSA and CTAP.Conclusion The dynamic-enhanced MRA using SENSE was a effective modality in demonstrating the hepatic vascular system. It may be a first choice modality in preoperative evaluation of orthotopic liver transplantation.

Diffusion tensor imaging (DTI) uses the diffusion motion of water molecules to describe the spatial structure of brain.DTI,which can obtain the infiltration of brain tumors into normal physiological structures,makes the diagnosis of diseases change from macroscopic to microscopic,from morphology to both morphology and metabolism,bringing new opportunities for the diagnosis and treatment of brain tumors.In this review,we outlined the theoretical basis and current technical limitations of DTI,and comprehensively discussed its research values in brain tumors radiotherapy treatment and its prognostic value.We believe that DTI can provide important imaging information for radiotherapy planning of brain tumors.

Objective To investigate whether an association existed between elevated serum β2-microglobulin levels and post stroke cognitive impairment(PSCI).Methods A total of 140 patients with ischemic stroke in Wenzhou People's Hospital during December 2022 to December 2023 were prospectively were enrolled including 73 patients in the PSCI group and 67 patients in the non-post stroke cognitive impairment(PSNCI)group.Serum β2-microglobulin and other biochemical indicators were measured within 24 hours after admission.PSCI was assessed using the mini-mental state examination(MMSE)score with a threshold of≥27 points serving as the diagnostic criterion.Results The age,National Institutes of Health Stroke Scale(NIHSS)score at admission,proportion of low education level,proportion of multiple or large area infarction and serum β2-microglobulin level in the PSCI group were higher than those in the PSNCI group.Multivariate Logistic regression analysis showed that age,NIHSS score at admission,multiple or large area infarction and serum β2-microglobulin level were risk factors for PSCI,and education level was a protective factor for PSCI.Conclusion The increase of β2-microglobulin level is a risk factor for cognitive impairment after ischemic stroke.The detection of β2-microglobulin level in stroke patients may realize the early detection of PSCI.

Objective:To explore the effect of the BPPV precision manipulation treatment. Method:With 3D SLICER software we segment structure such as semicircular canal, eye ball, orbital and ear rod from MRI or CT volume data of patients which underwent MRI or CT scaning of inner ear, for measuring the spatial direction of semicircular canals and building semicircular canal modules with standard space coordinate system and embedding into 3D PDF files. Result:With the slice that divide the semicircular canal equally as the semicircular canal plane and the eyeball as reference object to determine whether it is symmetric, it is not only intuitive but also reliable for measuring the angle between the posterior semicircular canal. 3D PDF is intuitive, rotation angle can be adjusted according to the individual differences in the process of manipulation treatment, to observe and demonstrate the theoretical reduction effect before the actual operation. Conclusion:By reconstruction the three-dimensional semicircular canal structure from the inner ear image data of patients and measurement of the semicircular canal space direction, it is of a certain significance for BPPV precision manipulation treatment.