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Positive susceptibility-based contrast imaging with dephased balanced steady-state free precession.
Magn Reson Med
March 2025
New Markets, Magnetic Resonance, Siemens Healthineers AG, Erlangen, Germany.
Purpose: Dephasing gradients can be introduced within a variety of gradient-echo pulse sequences to delineate local susceptibility changes ("White-Marker" phenomenon), e.g., for the visualization of metallic interventional devices which are otherwise difficult to display.
View Article and Find Full Text PDFDenoising complex-valued diffusion MR images using a two-step, nonlocal principal component analysis approach.
Magn Reson Med
March 2025
Center for Magnetic Resonance Research, Radiology, Medical School, University of Minnesota, Minneapolis, Minnesota, USA.
Purpose: To propose a two-step, nonlocal principal component analysis (PCA) method and demonstrate its utility for denoising complex diffusion MR images with a few diffusion directions.
Methods: A two-step denoising pipeline was implemented to ensure accurate patch selection even with high noise levels and was coupled with data preprocessing for g-factor normalization and phase stabilization before data denoising with a nonlocal PCA algorithm. At the heart of our proposed pipeline was the use of a data-driven optimal shrinkage algorithm to manipulate the singular values in a way that would optimally estimate the noise-free signal.
Prediction of dementia using CT imaging in stroke (PRODUCTS).
Eur Stroke J
March 2025
Institute of Cardiovascular and Metabolic Sciences, University of Glasgow, Glasgow, UK.
Introduction: A better understanding of who will develop dementia can inform patient care. Although MRI offers prognostic insights, access is limited globally, whereas CT-imaging is readily available in acute stroke. We explored the prognostic utility of acute CT-imaging for predicting dementia.
View Article and Find Full Text PDFStone density can predict the number of ESWL treatments needed in patients with pancreatic duct calculi.
Scand J Gastroenterol
March 2025
Department of Abdominal surgery, Helsinki University Hospital, Helsinki, Finland.
Objectives: Extracorporeal shock wave lithotripsy (ESWL) with endotherapy (ET) is the first-line treatment in patients with chronic pancreatitis (CP) and main pancreatic duct stone (PDS). Our study aimed to evaluate factors that predict the outcome of ESWL in CP patients with PDS.
Methods: We retrospectively analyzed data of 166 patients with CP and radiopaque PDS.
Integration of Photodiagnosis and Therapy Guided by Micro/Nanorobots.
Adv Mater
March 2025
Engineering Research Center for Pharmaceuticals and Equipments of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu, 610106, China.
Micro/Nanorobots(MNRs)integrated with phototherapy represent an emerging approach to cancer treatment and hold significant potential for addressing bacterial infections, neurological disorders, cardiovascular diseases, and related conditions. By leveraging micro/nanoscale motor systems in conjunction with phototherapy, these robots enable real-time guidance and monitoring of therapeutic processes, improving drug delivery precision and efficiency. This integration not only enhances the effectiveness of phototherapy but also minimizes damage to surrounding healthy tissues.
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