Dynamic MRI of the wrist in less than 20 seconds: normal midcarpal motion and reader reliability

Henrichon, Stephen; Foster, Brent; Shaw, Calvin B.; Bayne, Christopher O.; Szabo, Robert M.; Chaudhari, Abhijit J.; Boutin, Robert D.

doi:10.1007/s00256-019-03266-1

Cited by 17 publications

(20 citation statements)

References 48 publications

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“…Beyond its utility in dynamic speech imaging, the proposed data-sampling and reconstruction method may benefit other applications, particularly those in which dynamic edge information is critical, such as (1) dynamic MRI of cardiac function, [39][40][41] in which the endocardial and epicardial contours are of greatest importance; (2) dynamic MRI of the upper and lower airway, 42,43 where the pharyngeal airway and trachea are most critical; and (3) dynamic MRI of joint motion, 44,45 where the movement of bones and cartilage are most critical. The proposed sampling strategy may also benefit a 3D stack-of-radial (a.k.a.…”

Section: Discussionmentioning

confidence: 99%

Improved 3D real‐time MRI of speech production

Zhao

Lim

Byrd

et al. 2021

Magnetic Resonance in Med

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Purpose To provide 3D real‐time MRI of speech production with improved spatio‐temporal sharpness using randomized, variable‐density, stack‐of‐spiral sampling combined with a 3D spatio‐temporally constrained reconstruction. Methods We evaluated five candidate (k, t) sampling strategies using a previously proposed gradient‐echo stack‐of‐spiral sequence and a 3D constrained reconstruction with spatial and temporal penalties. Regularization parameters were chosen by expert readers based on qualitative assessment. We experimentally determined the effect of spiral angle increment and kz temporal order. The strategy yielding highest image quality was chosen as the proposed method. We evaluated the proposed and original 3D real‐time MRI methods in 2 healthy subjects performing speech production tasks that invoke rapid movements of articulators seen in multiple planes, using interleaved 2D real‐time MRI as the reference. We quantitatively evaluated tongue boundary sharpness in three locations at two speech rates. Results The proposed data‐sampling scheme uses a golden‐angle spiral increment in the kx−ky plane and variable‐density, randomized encoding along kz. It provided a statistically significant improvement in tongue boundary sharpness score (P < .001) in the blade, body, and root of the tongue during normal and 1.5‐times speeded speech. Qualitative improvements were substantial during natural speech tasks of alternating high, low tongue postures during vowels. The proposed method was also able to capture complex tongue shapes during fast alveolar consonant segments. Furthermore, the proposed scheme allows flexible retrospective selection of temporal resolution. Conclusion We have demonstrated improved 3D real‐time MRI of speech production using randomized, variable‐density, stack‐of‐spiral sampling with a 3D spatio‐temporally constrained reconstruction.

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Section: Discussionmentioning

confidence: 99%

Improved 3D real‐time MRI of speech production

Zhao

Lim

Byrd

et al. 2021

Magnetic Resonance in Med

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“…Three gradient echo sequences typically available on MRI scanners are suitable for real-time dynamic MRI and have already been used in previous studies to understand in vivo joint biomechanics. These are balanced steady-state free precession (SSFP) sequence [26,[28][29][30][31][32][33], RF-spoiled sequence [29,[34][35][36], and ultrafast gradient echo (UFGE) sequence [5,37], with different acronyms used by each MRI scanner manufacturer (Table 1).…”

Section: Real-time Dynamic Mri Sequences and Parametersmentioning

confidence: 99%

“…Cartesian and radial sampling of the k-space were both used for real-time dynamic MRI. Radial sampling was particularly suitable for real-time RF-spoiled sequences at 3.0 T [29,35], allowing an increase in temporal resolution without image quality deterioration with the use of constrained iterative reconstruction [29]. Such iterative reconstruction of real-time images often requires the addition of graphic processing units to the current MRI systems [45,46].…”

Section: Real-time Dynamic Mri Sequences and Parametersmentioning

confidence: 99%

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Dynamic MRI for articulating joint evaluation on 1.5 T and 3.0 T scanners: setup, protocols, and real-time sequences

et al. 2020

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Dynamic magnetic resonance imaging (MRI) is a non-invasive method that can be used to increase the understanding of the pathomechanics of joints. Various types of real-time gradient echo sequences used for dynamic MRI acquisition of joints include balanced steady-state free precession sequence, radiofrequency-spoiled sequence, and ultra-fast gradient echo sequence. Due to their short repetition time and echo time, these sequences provide high temporal resolution, a good signal-to-noise ratio and spatial resolution, and soft tissue contrast. The prerequisites of the evaluation of joints with dynamic MRI include suitable patient installation and optimal positioning of the joint in the coil to allow joint movement, sometimes with dedicated coil support. There are currently few recommendations in the literature regarding appropriate protocol, sequence standardizations, and diagnostic criteria for the use of real-time dynamic MRI to evaluate joints. This article summarizes the technical parameters of these sequences from various manufacturers on 1.5 T and 3.0 T MRI scanners. We have reviewed pertinent details of the patient and coil positioning for dynamic MRI of various joints. The indications and limitations of dynamic MRI of joints are discussed.

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“…However, standard MRI evaluates the stationary, immobilized wrist and is unable to directly evaluate dynamic carpal instability. Only a few studies have reported the use of fast MRI acquisition to visualize carpal kinematics[11, 16, 17]. This is primarily due to the slow encoding of k-space inherent to MRI that results in low temporal resolution, and the presence of susceptibility and other artifacts that may compromise image quality[11].…”

Section: Introductionmentioning

confidence: 99%

Real-time three-dimensional MRI for the assessment of dynamic carpal instability

et al. 2019

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BackgroundCarpal instability is defined as a condition where wrist motion and/or loading creates mechanical dysfunction, resulting in weakness, pain and decreased function. When conventional methods do not identify the instability patterns, yet clinical signs of instability exist, the diagnosis of dynamic instability is often suggested to describe carpal derangement manifested only during the wrist’s active motion or stress. We addressed the question: can advanced MRI techniques provide quantitative means to evaluate dynamic carpal instability and supplement standard static MRI acquisition? Our objectives were to (i) develop a real-time, three-dimensional MRI method to image the carpal joints during their active, uninterrupted motion; and (ii) demonstrate feasibility of the method for assessing metrics relevant to dynamic carpal instability, thus overcoming limitations of standard MRI.MethodsTwenty wrists (bilateral wrists of ten healthy participants) were scanned during radial-ulnar deviation and clenched-fist maneuvers. Images resulting from two real-time MRI pulse sequences, four sparse data-acquisition schemes, and three constrained image reconstruction techniques were compared. Image quality was assessed via blinded scoring by three radiologists and quantitative imaging metrics.ResultsReal-time MRI data-acquisition employing sparse radial sampling with a gradient-recalled-echo acquisition and constrained iterative reconstruction appeared to provide a practical tradeoff between imaging speed (temporal resolution up to 135 ms per slice) and image quality. The method effectively reduced streaking artifacts arising from data undersampling and enabled the derivation of quantitative measures pertinent to evaluating dynamic carpal instability.ConclusionThis study demonstrates that real-time, three-dimensional MRI of the moving wrist is feasible and may be useful for the evaluation of dynamic carpal instability.

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Dynamic MRI of the wrist in less than 20 seconds: normal midcarpal motion and reader reliability

Cited by 17 publications

References 48 publications

Improved 3D real‐time MRI of speech production

Improved 3D real‐time MRI of speech production

Dynamic MRI for articulating joint evaluation on 1.5 T and 3.0 T scanners: setup, protocols, and real-time sequences

Real-time three-dimensional MRI for the assessment of dynamic carpal instability

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