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The Effect of Scapular Orientation on Measures of Rotator Cuff Tendon Impingement: A Simulation Study.
J Appl Biomech
December 2024
Program in Physical Therapy, Washington University School of Medicine, St Louis, MO, USA.
Mechanical impingement of the rotator cuff tendons against the acromion (subacromial) and glenoid (internal) during shoulder motions has long been thought to contribute to tears. Clinically, the risk for impingement is thought to be influenced by scapular movement impairments. Therefore, our purpose was to determine the extent to which simulated changes in scapular orientation impact the proximity between the rotator cuff tendon footprint and the acromion and glenoid during scapular plane abduction.
View Article and Find Full Text PDFDetermining 3D Distributions of Pulsatile Blood Flow Using Orthogonal Simultaneous Biplane High-Speed Angiography (SB-HSA) with 1000 fps CdTe Photon Counting Detectors for 3D X-ray Particle Image Velocimetry (3D-XPIV) compared to Results Using Computational Fluid Dynamics (CFD).
Proc SPIE Int Soc Opt Eng
February 2023
Canon Stroke and Vascular Research Center, University at Buffalo (SUNY), Buffalo N.Y.
3D hemodynamic distributions are useful for the diagnosis and treatment of aneurysms. Detailed blood-flow patterns and derived velocity maps can be obtained using 1000 fps High Speed Angiography (HSA). The novel orthogonal Simultaneous Biplane High-Speed Angiography (SB-HSA) system enables flow information to be quantified in multiple planes, and with additional components of flow at depth, accurate 3D flow distributions are available.
View Article and Find Full Text PDFComparison of pulsatile flow dynamics before and after endovascular intervention in 3D-printed patient-specific internal carotid artery aneurysm models using 1000 fps photon-counting detectors for Simultaneous Biplane High Speed Angiography (SB-HSA).
Proc SPIE Int Soc Opt Eng
February 2023
Canon Stroke and Vascular Research Center, University at Buffalo (SUNY), Buffalo N.Y.
Article Synopsis
- The treatment of aneurysms faces challenges due to varying shapes and abnormal blood flow analysis, which conventional DSA imaging struggles to capture effectively because of low frame rates.
- High-Speed Angiography (HSA) at 1000 fps offers improved flow detail resolution, aiding clinicians in vascular interventions by clearly differentiating flow features like vortex formations and endoleaks in aneurysm models.
- Through experiments with patient-specific internal carotid artery aneurysm phantoms, simultaneous biplane HSA provided detailed visualizations of flow changes before and after stent deployment, highlighting its potential for enhanced interventional guidance.
Multi-angled simultaneous biplane High-Speed Angiography (HSA) of patient-specific 3D-printed aneurysm phantoms using 1000 fps CdTe Photon-Counting Detectors (PCD's).
Proc SPIE Int Soc Opt Eng
February 2023
University at Buffalo, Buffalo, New York, USA; Canon Research Stroke and Vascular Center, Buffalo, New York, USA.
1000 fps HSA enables visualization of flow details, which may be important in accurately guiding interventional procedures; however, single-plane imaging may lack clear visualization of vessel geometry and flow detail. The previously presented high-speed orthogonal biplane imaging may overcome these limitations but may still result in foreshortening of vessel morphology. In certain morphologies, acquiring two non-orthogonal biplane projections at multiple angles can provide better flow detail rather than a standard orthogonal biplane acquisition.
View Article and Find Full Text PDFSimultaneous Biplane High Speed 1000 fps X-ray Angiography (HSAngio).
Proc SPIE Int Soc Opt Eng
April 2022
Canon Stroke and Vascular Research Center, University at Buffalo, Buffalo, NY.
High-speed 1000-fps x-ray Angiography (HSAngio) images can be used to visualize blood-flow patterns and derive flow velocities during neurointerventional procedures. In this work, we present for the very first-time, orthogonal views of contrast injection in an aneurysm model acquired simultaneously using biplane HSAngio imaging. 3-D printed in-vitro models A and B of two different internal carotid-artery aneurysms were connected to a flow loop (circulation fluid: 60% water, 40% glycerol solution, circulation flow rate: 8 L/s).
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