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Filename: controllers/Detail.php
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File: /var/www/html/application/controllers/Detail.php
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File: /var/www/html/index.php
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Objective: In magnetic resonance imaging (MRI), compressed sensing (CS) enables the reconstruction of undersampled sparse data sets. Thus, partial acquisition of the underlying k-space data is sufficient, which significantly reduces measurement time. While F MRI data sets are spatially sparse, they often suffer from low SNR. This can lead to artifacts in CS reconstructions that reduce the image quality. We present a method to improve the image quality of undersampled, reconstructed CS data sets.
Materials And Methods: Two resampling strategies in combination with CS reconstructions are presented. Numerical simulations are performed for low-SNR spatially sparse data obtained from F chemical-shift imaging measurements. Different parameter settings for undersampling factors and SNR values are tested and the error is quantified in terms of the root-mean-square error.
Results: An improvement in overall image quality compared to conventional CS reconstructions was observed for both strategies. Specifically spike artifacts in the background were suppressed, while the changes in signal pixels remained small.
Discussion: The proposed methods improve the quality of CS reconstructions. Furthermore, because resampling is applied during post-processing, no additional measurement time is required. This allows easy incorporation into existing protocols and application to already measured data.
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http://dx.doi.org/10.1007/s10334-018-0729-1 | DOI Listing |
J Neural Eng
December 2024
University of California San Francisco, 513 Parnassus Avenue, S362, SAN FRANCISCO, San Francisco, 94143, CHINA.
Objective: Electroencephalography (EEG) and Magnetoencephalography (MEG) are widely used non-invasive techniques in clinical and cognitive neuroscience. However, low spatial resolution measurements, partial brain coverage by some sensor arrays, as well as noisy sensors could result in distorted sensor topographies resulting in inaccurate reconstructions of underlying brain dynamics. Solving these problems has been a challenging task, This paper proposes a robust framework based on electromagnetic source imaging for interpolation of unknown or poor quality EEG/MEG measurements.
View Article and Find Full Text PDFAm J Trop Med Hyg
December 2024
Department of Infectious Diseases, The First Affiliated Hospital of Bengbu Medical College, Bengbu, China.
Typhoid fever is a human-specific disease caused by subspecies of Salmonella enterica (Salmonella Typhi). It spreads through ingestion of contaminated food or water and is diagnosed through blood culture or bone marrow culture. It typically presents as an intestinal infection, with a few patients developing severe disseminated infections.
View Article and Find Full Text PDFBull Menninger Clin
December 2024
Emergency medicine physician, NYC Health + Hospitals, Department of Emergency Medicine.
This review focuses on chronic pediatric skin conditions-vitiligo, psoriasis, alopecia, and eczema-and their profound psychosocial impact on children and adolescents. Currently, a comprehensive comparative analysis across these conditions is absent, and comparisons between diverse psychosocial measures are lacking. This review aims to bridge that gap through a systematic review analyzing studies from PubMed and Embase up to April 2023 according to PRISMA.
View Article and Find Full Text PDFVopr Kurortol Fizioter Lech Fiz Kult
December 2024
S.I. Spasokukotsky Moscow Centre for Research and Practice in Medical Rehabilitation, Restorative and Sports Medicine, Moscow, Russia.
Unlabelled: Post-stroke cognitive impairments are widespread and significantly reduce the quality of life and rehabilitation prognosis of patients. Clinical observations show a serious variability of cognitive impairments in patients after acute cerebrovascular accident. Thus, the classification of above mentioned disorders, based on which it would be possible to determine the order of individualization of a cognitive rehabilitation program, is currently not available in literature.
View Article and Find Full Text PDFAbdom Radiol (NY)
December 2024
Cincinnati Children's Hospital Medical Center, Cincinnati, USA.
Objectives: Implementation of diffusion-weighted imaging (DWI) for abdominal imaging in children has challenges due to motion artifacts exacerbated by long acquisition times. We aimed to compare acquisition time and image quality between conventional DWI and multi-band (MB) DWI of the liver in children and young adults.
Methods: Clinical MRI exams from May 2023 to January 2024 were reviewed, including four DWI sequences: respiratory-triggered (RTr, clinical standard), free-breathing (FB), MB-DWI with shift factor 1 (MBsf1), and MB-DWI with shift factor 2 (MBsf2).
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