Electrical conductivity imaging using magnetic resonance tomography

2009 ◽  
Author(s):  
U. Katscher ◽  
T. Voigt ◽  
C. Findeklee
Keyword(s):  
Electrical Conductivity ◽  
Magnetic Resonance ◽  
Magnetic Resonance Tomography ◽  
Conductivity Imaging

scholarly journals Evaluation of Hepatoprotective Effect of Curcumin on Liver Cirrhosis Using a Combination of Biochemical Analysis and Magnetic Resonance-Based Electrical Conductivity Imaging

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Eun Jung Kyung ◽  
Hyun Bum Kim ◽  
Eun Sang Hwang ◽  
Seok Lee ◽  
Bup Kyung Choi ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Liver Cirrhosis ◽  
Magnetic Resonance ◽  
Biochemical Analysis ◽  
Normal Liver ◽  
Hepatoprotective Effect ◽  
Curcumin Treatment ◽  
Conductivity Imaging ◽  
Inflammatory Effect ◽  
Liver Tissues

In oriental medicine, curcumin is used to treat inflammatory diseases, and its anti-inflammatory effect has been reported in recent research. In this feasibility study, the hepatoprotective effect of curcumin was investigated using a rat liver cirrhosis model, which was induced with dimethylnitrosamine (DMN). Together with biochemical analysis, we used a magnetic resonance-based electrical conductivity imaging method to evaluate tissue conditions associated with a protective effect. The effects of curcumin treatment and lactulose treatment on liver cirrhosis were compared. Electrical conductivity images indicated that liver tissues damaged by DMN showed decreased conductivity compared with normal liver tissues. In contrast, cirrhotic liver tissues treated with curcumin or lactulose showed increased conductivity than tissues in the DMN-only group. Specifically, conductivity of cirrhotic liver after curcumin treatment was similar to that of normal liver tissues. Histological staining and immunohistochemical examination showed significant levels of attenuated fibrosis and decreased inflammatory response after both curcumin and lactulose treatments compared with damaged liver tissues by DMN. The conductivity imaging and biochemical examination results indicate that curcumin’s anti-inflammatory effect can prevent the progression of irreversible liver dysfunction.

Electrical conductivity imaging by magnetic resonance electrical impedance tomography (MREIT)

2003 ◽  
Vol 50 (4) ◽  
pp. 875-878 ◽  
Author(s):  
Suk H. Oh ◽  
Jae Y. Han ◽  
Soo Y. Lee ◽  
Min H. Cho ◽  
Byung I. Lee ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Magnetic Resonance ◽  
Electrical Impedance Tomography ◽  
Electrical Impedance ◽  
Impedance Tomography ◽  
Conductivity Imaging

scholarly journals Identification of Brain Damage after Seizures Using an MR-Based Electrical Conductivity Imaging Method

Diagnostics ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 569
Author(s):  
Sanga Kim ◽  
Bup Kyung Choi ◽  
Ji Ae Park ◽  
Hyung Joong Kim ◽  
Tong In Oh ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Magnetic Resonance ◽  
Electrical Properties ◽  
Brain Damage ◽  
High Frequency ◽  
Neuronal Cell ◽  
Imaging Method ◽  
Nissl Staining ◽  
Functional Changes ◽  
Conductivity Imaging

Previous imaging studies have shown the morphological malformation and the alterations of ionic mobility, water contents, electrical properties, or metabolites in seizure brains. Magnetic resonance electrical properties tomography (MREPT) is a recently developed technique for the measurement of electrical tissue properties with a high frequency that provides cellular information regardless of the cell membrane. In this study, we examined the possibility of MREPT as an applicable technique to detect seizure-induced functional changes in the brain of rats. Ultra-high field (9.4 T) magnetic resonance imaging (MRI) was performed, 2 h, 2 days, and 1 week after the injection of N-methyl-D-aspartate (NMDA; 75 mg/kg). The conductivity images were reconstructed from B1 phase images using a magnetic resonance conductivity imaging (MRCI) toolbox. The high-frequency conductivity was significantly decreased in the hippocampus among various brain regions of NMDA-treated rats. Nissl staining showed shrunken cell bodies and condensed cytoplasm potently at 2 h after NMDA treatment, and neuronal cell loss at all time points in the hippocampus. These results suggest that the reduced electrical conductivity may be associated with seizure-induced neuronal loss in the hippocampus. Magnetic resonance (MR)-based electrical conductivity imaging may be an applicable technique to non-invasively identify brain damage after a seizure.

CT and MRI imaging of glomus tumors of the temporal bone

2018 ◽  
pp. 26-32
Author(s):  
E. A. Stepanova ◽  
М. V. Vishnyakova ◽  
V. I. Sambulov ◽  
I. Т. Mukhamedov
Keyword(s):  
Magnetic Resonance ◽  
Diagnostic Imaging ◽  
Temporal Bone ◽  
Glomus Tumor ◽  
Magnetic Resonance Tomography ◽  
Mri Imaging ◽  
Glomus Tumors ◽  
Magnetic Resonance Imaging Mri ◽  
Temporal Bone Tumor ◽  
Ct And Mri

Glomus tumor is one of the most common temporal bone tumors. Most of them are benign and locally invasive, some are occasionally able to metastasize and have signs of malignancy. Diagnostic imaging is necessary before treatment. Computer tomography (CT) is traditionally used as a primary method of diagnosis, to recognize changes in the temporal bone. Role of magnetic resonance imaging (MRI) in temporal bone tumor diagnosis is not definitively determined.Purpose. To assess the possibilities of computer and magnetic resonance tomography, to develop an algorithm for the application of diagnostic imaging methods in the diagnosis of glomus tumors of the temporal bone.Material and methods. The article presents the experience of diagnosing 30 patients with glomus tumors.Results. The tympanic form of the glomus tumor was observed in 11 cases (37%), tympano-yugular in 19 cases (63%). CT and MRI data totally coincided in cases of small tumors (type A and B). In the presence of extended forms CT ability of assessing bone invasion, involvement of the internal carotid artery, internal jugular vein, and dural sinuses was lower than the MRI.

Modern Radiodiagnostics Technology of Metastasises in Pelvic Lymph Nodes

2017 ◽  
pp. 100-108
Author(s):  
V. N. Diomidova ◽  
O. A. Еfimova
Keyword(s):  
Lymph Node ◽  
Magnetic Resonance ◽  
Lymph Nodes ◽  
Metastatic Lymph Node ◽  
Magnetic Resonance Tomography ◽  
Visual Images ◽  
Pelvic Lymph Nodes ◽  
High Information Content ◽  
Pelvic Cancer ◽  
High Information

The analysis of the diagnostic informativeness of modern radiodiagnosticis methods in determining metastatic lymph node of pelvic cancer gynecological organs according to domestic and foreign publications. At the present stage methods of obtaining visual images pelvic lymph nodes are radiodiagnostics technologies (radiological, ultrasound, magnetic resonance tomography, scintigraphic). The analysis has shown that the researches devoted to diagnostic informational content of modern methods of radiodiagnosis in a differentiation of nature of damage of pelvic lymph nodes aren't enough. According to the literature, the most rational and perspective method for radiodiagnosis metastatics lymph node is a magnetic resonance imaging due to the high information content and thus specificity. At the same time, the continued relevance of further study of methods of radiodiagnostics in order to find the optimal one for the assessment of pelvic lymph nodes.

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