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Functional myocardial assessment in cine cardiac computerized tomographic angiography using echocardiographic feature-tracking software in patients with and without significant coronary disease.
Int J Cardiol Heart Vasc
February 2025
The Azrieli Faculty of Medicine in the Galilee, Bar-Ilan University, Zefat, Israel.
Introduction: Cardiac computerized tomographic angiography (CCTA) is perceived as a non-invasive tool for assessment of coronary vessel anatomy. Feature tracking echocardiography has recently emerged as a tool for assessment of regional and global left ventricular function. We aimed to explore the applicability of echocardiographic strain on CCTA cine clips and assess whether global and regional strain parameters are associated with the extent of coronary stenosis.
View Article and Find Full Text PDFHigh takeoff of the right coronary artery by echocardiography: normal variant or something more?
Cardiol Young
January 2025
Congenital Heart Center, Division of Pediatric Cardiology, Department of Pediatrics, University of Florida, Gainesville, FL, USA.
Purpose: High takeoff of the right coronary artery suspected by echocardiography is widely considered a normal variant. However, in our experience, some patients initially thought to have a high takeoff of the coronary artery were later found to have an anomalous coronary origin with high-risk features. The aim of this study was to test the hypothesis that high takeoff of the right coronary artery suspected by echocardiography may indicate the presence of an anomalous coronary artery lesion with an intramural course requiring further investigation.
View Article and Find Full Text PDFHypermagnesemia- and Hyperphosphatemia-Associated Cardiac Arrest after Injection of a Novel Magnesium-Based Bone Cement in Spinal Surgery.
J Am Acad Orthop Surg Glob Res Rev
January 2025
From the Department of Orthopaedic Surgery, Singapore General Hospital, Singapore (Dr. Loh, Dr. Ling, Dr. Jiang, and Lim) and the Department of Surgical Intensive Care, Division of Anaesthesiology and Perioperative Medicine, Singapore General Hospital, Singapore (Dr. Goh).
We report a case of pulseless electrical activity (PEA) associated with profound hypermagnesemia immediately after cementation of a novel magnesium-based cement in spine surgery. During T8 to T12 posterior instrumentation and decompression laminectomy for vertebral metastasis secondary to lung cancer, a 61-year-old Chinese woman developed sudden hypotension and went into PEA immediately after injection of a novel magnesium-based cement. Intraoperative fluoroscopic imaging did not show any notable cement extravasation.
View Article and Find Full Text PDFSingle-View Fluoroscopic X-Ray Pose Estimation: A Comparison of Alternative Loss Functions and Volumetric Scene Representations.
J Imaging Inform Med
December 2024
Department of Radiology, Northwestern Medicine, Northwestern University, Chicago, IL, USA.
Many tasks performed in image-guided procedures can be cast as pose estimation problems, where specific projections are chosen to reach a target in 3D space. In this study, we construct a framework for fluoroscopic pose estimation and compare alternative loss functions and volumetric scene representations. We first develop a differentiable projection (DiffProj) algorithm for the efficient computation of Digitally Reconstructed Radiographs (DRRs) from either Cone-Beam Computerized Tomography (CBCT) or neural scene representations.
View Article and Find Full Text PDFLUFT: A low-frequency ultrasound tomography system designed for lung imaging.
IEEE Sens J
April 2024
Department of Mathematics and the School of Biomedical Engineering, Colorado State University, Fort Collins, CO 80523 USA.
Pulmonary imaging with ultrasound in the conventional MHz range suffers from significant artifacts, as the high frequency acoustic waves primarily reflect off of the lung pleura with little to no penetration through the lung tissue. Furthermore, B-mode ultrasound images are difficult to interpret and require a skilled technician to obtain. Motivated by the finding that acoustic frequencies in the kHz penetrate lung tissue, a low-frequency tomographic ultrasound system is presented.
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