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Magnetic-resonance Imaging - Crossref

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Last Updated: 04 December 2022

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Assessing the reproducibility of high temporal and spatial resolution dynamic contrast-enhanced magnetic resonance imaging in patients with gliomas

In order to determine DCE parameters, each patient with glioblastoma was segmented twice for improving lesions. According to WHO statistics, In patients with gliomas, arterial input functions, and DCE parameters obtained from T2 hyperintense lesions were obtained, and DCE values were compared to WHO norms. AIFs from HR-DCE MRI's maximum signal intensity and wash-in slope were noticeably higher than those from C-DCE MRI MRI. Grade 4 was classified as "grade 2 and 3 gliomas" by both 95th percentile K trans and V e from HR-DCE and C-DCE MRI, and grade C-DCE and C-DCE MRI's could be distinguished from grade 2 and 3 gliomas.

Source link: https://doi.org/10.1038/s41598-021-02450-5


New cine magnetic resonance imaging parameters for the differential diagnosis of chronic intestinal pseudo-obstruction

Abstract Abstract: Chronic intestinal pseudo-obstruction is a common and refractory intestinal motility disorder whose diagnosis currently depends on subjective imaging results. Cine magnetic resonance imaging may greatly enhance quantitative evaluation of gastrointestinal motility's quantitative analysis, but appropriate CIPO detection techniques must be established. Cine MRI was performed in seven patients with CIPO and 11 healthy controls. As the original parameters to determine CIPO diagnostic thresholds, the Mahalanobis distance and time variation per time were used. In addition, the connection between cine MRI findings and CIPO severity was investigated. Any of the intestinal tracts of patients with severe CIPO requiring home parenteral diet was identified by x 1 x 2 u2264 0. 15 inches. Cine MRI is most suitable for the quantitative analysis of small intestinal motility and CIPO diagnosis when using the abovementioned parameters, and can be helpful in treatment decision-making.

Source link: https://doi.org/10.1038/s41598-021-02268-1


Improvement of magnetic resonance imaging using a wireless radiofrequency resonator array

Abstract In recent years, new human magnetic resonance imaging systems operating at static magnetic field strengths of 7 Tesla or higher have been available, offering improved signal sensitivity in comparison to lower field strengths. In the intended area, we show that inductive coupling between the resonator array and the coil increases the transmittivity and signal sensitivity. The simple form, flexibility, and cost-effectiveness make the proposed array layout an attractive option for changing the transmit field distribution method, particularly at large field systems, where the wavelength is similar to tissue size.

Source link: https://doi.org/10.1038/s41598-021-02533-3


The sensitivity of magnetic particle imaging and fluorine-19 magnetic resonance imaging for cell tracking

Our aim is to determine the cellular sensitivity of MPI and 19 F MRI for the detection of mesenchymal stem cells and breast cancer cells. MPI has the ability to be more sensitive than 19 F MRI for cell tracking. The effectiveness of MPI and 19 F MRI was determined by imaging MSC administered by different routes. In vivo imaging revealed reduced sensitivity compared to ex vivo cell pellets of the same cell number. Reduced MPI and 19 F MRI cell detection in vivo are due to other factors, which are not indicated.

Source link: https://doi.org/10.1038/s41598-021-01642-3


Comparison of multiparametric magnetic resonance imaging sequences with laboratory parameters for prognosticating renal function in chronic kidney disease

Abstract: Magnetic resonance imaging is playing an increasingly important role in diagnosing chronic kidney disease. Although different MRI methods have been used in renal disease, there are no studies that have compared the different sequences. T1 values and tissue perfusion were found in a similar way between T1 values and tissue perfusion, as well as between fractional anisotropy and apparent diffusion coefficient values, according to a Principal component analysis. After adjusting for degree of proteinuria, a common prognostic factor for CKD, in multiple regression analyses, only T2* results, derived from the blood oxygenation level-dependent MRI sequence, were found with estimated glomerular filtration rate slope.

Source link: https://doi.org/10.1038/s41598-021-01147-z


Comparison of mitral regurgitation severity assessments based on magnetic resonance imaging and echocardiography in patients with hypertrophic cardiomyopathy

Echocardiography is the most common method for determining MR severity, although cardiac magnetic resonance imaging is considered the reference standard for determining the regurgitant volume and fraction. According to HCM, the aim of this study was to compare the results of echocardiography and cardiac MRI for determining MR severity in a population of patients with HCM. In 53 patients using cardiac MRI for diagnosis of the mitral RV and mitral RF, MR severity was measured. Greater than mild MR, as determined by echocardiography, was present in 22 patients with HCM and none of the control patients. Patients with echocardiography-based moderate and severe MR had similar median MRVs and MRFs, according to identical median MRVs and MRFs. In HCM patients, cardiac MRI, and echocardiography, the majority of researchers in assessing MR severity were in weak agreement.

Source link: https://doi.org/10.1038/s41598-021-99446-y

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions