Measurement of tibiofemoral kinematics using highly accelerated 3D radial sampling
نویسندگان
چکیده
منابع مشابه
Measurement of tibiofemoral kinematics using highly accelerated 3D radial sampling.
This study investigated the use of dynamic, volumetric MRI to measure 3D skeletal motion. Ten healthy subjects were positioned on a MR-compatible knee loading device and instructed to harmonically flex and extend their knee at 0.5 Hz. The device induced active quadriceps loading with knee flexion, similar to the load acceptance phase of gait. Volumetric images were continuously acquired for 5 m...
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INTRODUCTION Dynamic magnetic resonance imaging (MRI) can characterize musculoskeletal mechanics during movement. Previously, both real-time [1] and cine phase contrast (PC) [2] sequences have been used to measure in vivo skeletal kinematics. However, both sequences are only able to image a single plane within reasonable scan times. While cine-PC provides 3D velocity information which can be in...
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PURPOSE To introduce the wave-CAIPI (controlled aliasing in parallel imaging) acquisition and reconstruction technique for highly accelerated 3D imaging with negligible g-factor and artifact penalties. METHODS The wave-CAIPI 3D acquisition involves playing sinusoidal gy and gz gradients during the readout of each kx encoding line while modifying the 3D phase encoding strategy to incur intersl...
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In this article, we present a 3D imaging technique, applying center-out RAdial Sampling with Off-Resonance reception, to accurately depict and localize small paramagnetic objects with high positive contrast while suppressing long T(2) (*) components. The center-out RAdial Sampling with Off-Resonance reception imaging technique is a fully frequency-encoded 3D ultrashort echo time acquisition met...
متن کاملComputerised measurement of tibiofemoral alignment.
Tibiofemoral alignment has a direct correlation with the survival of total knee arthroplasty. Traditionally, it has been measured using a goniometer on radiographs. We describe new software which measures this alignment on scanned radiographs by automatically detecting bones in the image. Two surgeons used conventional methods and two clerical officers used the computerised routine to assess 58...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2012
ISSN: 0740-3194
DOI: 10.1002/mrm.24362