Clinical feasibility of ultrafast intracranial vessel imaging with non-Cartesian spiral 3D time-of-flight MR angiography at 1.5T: An intra-individual comparison study

Sartoretti, Thomas; Sartoretti, Elisabeth; Schwenk, Árpád; Smoorenburg, Luuk van; Mannil, Manoj; Euler, André; Becker, Anton S.; Alfieri, Alex; Najafi, Arash; Binkert, Christoph A.; Wyss, Michael; Sartoretti–Schefer, Sabine

doi:10.1371/journal.pone.0232372

Cited by 11 publications

(12 citation statements)

References 31 publications

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“…These traits render spiral sequences more robust in terms of several artifacts [6,7,12,13,16,17]. The advantages of spiral MRI were demonstrated in clinical pilot studies for brain and spine imaging [8][9][10][11][12][13].…”

Section: Discussionmentioning

confidence: 99%

“…Spiral sequences offer high k-space sampling efficiency and central k-space oversampling, thus enabling artifact-robust imaging at even shorter scan times than for conventional T1W sequences [6,7]. Spiral sequences have previously shown promise for anatomic and functional imaging of various regions [6][7][8][9][10][11][12][13][14]. However, to our knowledge, the utility of spiral sequences has not been systematically explored for clinical head and neck MRI.…”

Section: Accepted Manuscript Introductionmentioning

confidence: 99%

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Contrast-Enhanced T1-Weighted Head and Neck MRI: Prospective Intraindividual Image Quality Comparison of Spiral GRE, Cartesian GRE, and Cartesian TSE Sequences

Sartoretti

Sartoretti–Schefer

Smoorenburg

et al. 2022

American Journal of Roentgenology

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The publication of this Accepted Manuscript is provided to give early visibility to the contents of the article, which will undergo additional copyediting, typesetting, and review before it is published in its final form. During the production process, errors may be discovered that could affect the content of the Accepted Manuscript. All legal disclaimers that apply to the journal pertain. The reader is cautioned to consult the definitive version of record before relying on the contents of this document.

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Section: Discussionmentioning

confidence: 99%

Section: Accepted Manuscript Introductionmentioning

confidence: 99%

Contrast-Enhanced T1-Weighted Head and Neck MRI: Prospective Intraindividual Image Quality Comparison of Spiral GRE, Cartesian GRE, and Cartesian TSE Sequences

Sartoretti

Sartoretti–Schefer

Smoorenburg

et al. 2022

American Journal of Roentgenology

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“…Although we believe that the neuroradiologist with .10 years of experience was professional in drawing ROIs, $2 readers would be better. Sixth, spiral TOF-MRA, which potentially delivers high-quality intracranial vessel imaging at a short scan time, was not included for comparison in the study 28,29 and will be studied in future work.…”

Section: Discussionmentioning

confidence: 99%

Acceleration of Brain TOF-MRA with Compressed Sensitivity Encoding: A Multicenter Clinical Study

Ding

Duan

Zhuo

et al. 2021

AJNR Am J Neuroradiol

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BACKGROUND AND PURPOSE:The clinical practice of three-dimensional TOF-MRA, despite its capability in brain artery assessment, has been hampered by the relatively long scan time, while recent developments in fast imaging techniques with random undersampling has shed light on an improved balance between image quality and imaging speed. Our aim was to evaluate the effectiveness of TOF-MRA accelerated by compressed sensitivity encoding and to identify the optimal acceleration factors for routine clinical use. MATERIALS AND METHODS:One hundred subjects, enrolled at 5 centers, underwent 8 brain TOF-MRA sequences: 5 sequences using compressed sensitivity encoding with acceleration factors of 2, 4, 6, 8, and 10 (CS2, CS4, CS6, CS8, and CS10), 2 using sensitivity encoding with factors of 2 and 4 (SF2 and SF4), and 1 without acceleration as a reference sequence (RS). Five large arteries, 6 medium arteries, and 6 small arteries were evaluated quantitatively (reconstructed signal intensity, structural similarity, contrast ratio) and qualitatively (scores on arteries, artifacts, overall image quality, and diagnostic confidence for aneurysm and stenosis). Comparisons were performed among the 8 sequences. RESULTS:The quantitative measurements showed that the reconstructed signal intensities of the assessed arteries and the structural similarity consistently decreased as the compressed sensitivity encoding acceleration factor increased, and no significant difference was found for the contrast ratios in pair-wise comparisons among SF2, CS2, and CS4. Qualitative evaluations showed no significant difference in pair-wise comparisons among RS, SF2, and CS2 (P . .05). The visualization of all the assessed arteries was acceptable for CS2 and CS4, while 2 small arteries in images of CS6 were not reliably displayed, and the visualization of large arteries was acceptable in images of CS8 and CS10. CONCLUSIONS: CS4 is recommended for routine brain TOF-MRA with balanced image quality and acquisition time; CS6, for examinations when small arteries are not evaluated; and CS10, for fast visualization of large arteries.

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“…Recent hardware and software improvements and developments have made spiral MRI feasible for structural MRI on clinical scanners. Accordingly, select clinical pilot studies have explored and shown the value of spiral MRI for brain imaging 8–15 . As in the case of radial sampling, spiral MRI also relies on a non-Cartesian readout scheme thus representing a further advantageous alternative to conventional Cartesian imaging.…”

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confidence: 99%

Qualitative and Quantitative Analysis of a Spiral Gradient Echo Sequence for Contrast-Enhanced Fat-Suppressed T1-Weighted Spine Magnetic Resonance Imaging

Sartoretti

Smoorenburg

et al. 2021

Invest Radiol

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Objectives: Pulse sequences with non-Cartesian k-space sampling enable improved imaging in anatomical areas with high degrees of motion artifacts. We analyzed a novel spiral 3-dimensional (3D) gradient echo (GRE) magnetic resonance imaging (MRI) sequence ("spiral," 114.7 ± 11 seconds) and compared it with a radial 3D GRE ("vane," 216.7 ± 2 seconds) and a conventional Cartesian 2D turbo spin echo (TSE) sequence ("TSE," 266.7 ± 82 seconds) for contrast-enhanced fat-suppressed T1-weighted spine imaging. Materials and Methods: Forty consecutive patients referred for contrast-enhanced MRI were prospectively scanned with all 3 sequences. A qualitative analysis was performed by 3 readers using 4-or 5-point Likert scales to independently grade images in terms of overall image quality, occurrence of artifacts, lesion conspicuity, and conspicuity of nerve roots. The numbers of visible nerve roots per sequence and patient were counted in consensus. Coefficient of variation measurements were performed for the paravertebral musculature (CV PM ) and the spinal cord (CV SC ). Results: Spiral (median [interquartile range], 5 [4-5]) exhibited improved overall image quality in comparison to ) and vane (4 [4-5]; both P < 0.001). Vane surpassed TSE in terms of overall image quality (P < 0.001). Spiral (4 [3.75-4]) and vane (3.5 [3-4]) presented with less artifacts than ]; both P < 0.001). ) outperformed vane (4 [3-5]; P = 0.01) and ; P = 0.04) in terms of lesion conspicuity. Conspicuity of nerve roots was superior on spiral (3 [3-4]) and vane (4 [3-4]) when compared with TSE (1.5 [1-2]; both P < 0.001). Readers discerned significantly more nerve roots on spiral (4 [2.75-8]) and vane (4 [3.75-7.25]) images when compared with TSE (2 [0-4]; both P < 0.001). Interreader agreement ranged from moderate (α = 0.639) to almost perfect (α = 0.967). CV PM and CV SC were significantly lower on spiral as compared with vane and TSE (P < 0.001, P = 0.04). Vane exhibited lower CV PM and CV SC than TSE (P < 0.001, P = 0.01). Conclusions: A novel spiral 3D GRE sequence improves contrast-enhanced fatsuppressed T1-weighted spinal imaging qualitatively and quantitatively in comparison with a conventional Cartesian 2D TSE sequence and to a lesser extent with a radial 3D GRE sequence at shorter scan times.

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Clinical feasibility of ultrafast intracranial vessel imaging with non-Cartesian spiral 3D time-of-flight MR angiography at 1.5T: An intra-individual comparison study

Cited by 11 publications

References 31 publications

Contrast-Enhanced T1-Weighted Head and Neck MRI: Prospective Intraindividual Image Quality Comparison of Spiral GRE, Cartesian GRE, and Cartesian TSE Sequences

Contrast-Enhanced T1-Weighted Head and Neck MRI: Prospective Intraindividual Image Quality Comparison of Spiral GRE, Cartesian GRE, and Cartesian TSE Sequences

Acceleration of Brain TOF-MRA with Compressed Sensitivity Encoding: A Multicenter Clinical Study

Qualitative and Quantitative Analysis of a Spiral Gradient Echo Sequence for Contrast-Enhanced Fat-Suppressed T1-Weighted Spine Magnetic Resonance Imaging

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