3D-FSE Isotropic MRI of the Lumbar Spine

Blizzard, Daniel J.; Haims, Andrew; Lischuk, Andrew; Arunakul, Rattalerk; Hustedt, Joshua W.; Grauer, Jonathan N.

doi:10.1097/bsd.0b013e31827a32ee

Cited by 21 publications

(15 citation statements)

References 14 publications

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“…In spine imaging, most of the studies using 3D isotropic sequences were feasibility studies reporting less artifacts and better delineation of small structures, or studies evaluating inter-method and inter-observer agreement (91011121314). Recently, Lee et al (15) compared 3D T2-weighted turbo spin-echo (TSE) and 2D T2-weighted TSE sequences of the lumbar spine, with surgical findings and symptoms.…”

Section: Introductionmentioning

confidence: 99%

Diagnosis of Nerve Root Compromise of the Lumbar Spine: Evaluation of the Performance of Three-dimensional Isotropic T2-weighted Turbo Spin-Echo SPACE Sequence at 3T

et al. 2017

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ObjectiveTo explore the performance of three-dimensional (3D) isotropic T2-weighted turbo spin-echo (TSE) sampling perfection with application optimized contrasts using different flip angle evolution (SPACE) sequence on a 3T system, for the evaluation of nerve root compromise by disc herniation or stenosis from central to extraforaminal location of the lumbar spine, when used alone or in combination with conventional two-dimensional (2D) TSE sequence.Materials and MethodsThirty-seven patients who had undergone 3T spine MRI including 2D and 3D sequences, and had subsequent spine surgery for nerve root compromise at a total of 39 nerve levels, were analyzed. A total of 78 nerve roots (48 symptomatic and 30 asymptomatic sites) were graded (0 to 3) using different MRI sets of 2D, 3D (axial plus sagittal), 3D (all planes), and combination of 2D and 3D sequences, with respect to the nerve root compromise caused by posterior disc herniations, lateral recess stenoses, neural foraminal stenoses, or extraforaminal disc herniations; grading was done independently by two readers. Diagnostic performance was compared between different imaging sets using the receiver operating characteristics (ROC) curve analysis.ResultsThere were no statistically significant differences (p = 0.203 to > 0.999) in the ROC curve area between the imaging sets for both readers 1 and 2, except for combined 2D and 3D (0.843) vs. 2D (0.802) for reader 1 (p = 0.035), and combined 2D and 3D (0.820) vs. 3D including all planes (0.765) for reader 2 (p = 0.049).ConclusionThe performance of 3D isotropic T2-weighted TSE sequence of the lumbar spine, whether axial plus sagittal images, or all planes of images, was not significantly different from that of 2D TSE sequences, for the evaluation of nerve root compromise of the lumbar spine. Combining 2D and 3D might possibly improve the diagnostic accuracy compared with either one.

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Section: Introductionmentioning

confidence: 99%

Diagnosis of Nerve Root Compromise of the Lumbar Spine: Evaluation of the Performance of Three-dimensional Isotropic T2-weighted Turbo Spin-Echo SPACE Sequence at 3T

et al. 2017

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“…The short T 2 relaxation constants of musculoskeletal tissue made the use of high turbo‐spin echo factors problematic due to the fast signal decay . More recently available improvements enabled the use of long echo trains for T 2 spin echo sequences and their clinical application with true T 2 contrast, improving diagnostic performance for the spine …”

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confidence: 99%

“…8 More recently available improvements enabled the use of long echo trains for T 2 spin echo sequences and their clinical application with true T 2 contrast, improving diagnostic performance for the spine. 9,10 Despite these recent technical improvements, 2D sequences have widely remained the standard in clinical routine, mostly due to shorter scan times. Despite the use of parallel imaging, the accelerated 3D sequences still require 6 to 7 minutes of scan time.…”

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confidence: 99%

Accelerated MRI of the Lumbar Spine Using Compressed Sensing: Quality and Efficiency

Bratke

Rau

Weiss

et al. 2018

Magnetic Resonance Imaging

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Background Decreasing MRI scan time is a key factor to increase patient comfort and compliance as well as the productivity of MRI scanners. Purpose/Hypothesis Compressed sensing (CS) should significantly accelerate 3D scans. This study evaluated the clinical application and cost effectiveness of accelerated 3D T2 sequences of the lumbar spine. Study Type Prospective, cross‐sectional, observational. Population Twenty healthy volunteers and 10 patients. Field Strength/Sequence A 3D T2 TSE sequence, identical 3D sequences with three different parallel imaging and CS accelerating factors, and 2D TSE sequences as a clinical reference were obtained on a 3T scanner. Assessment Three readers evaluated the sequences for delineation of anatomical structures and image quality. A quantitative analysis consisting of root mean square error, structural similarity index, signal‐to‐noise ratio, and contrast‐to‐noise ratio were performed. The scan times were used to calculate cost differences for each sequence. Statistical Tests An analysis of variance with repeated measurements and the Friedman test were used to test for potential differences between the sequences. Post‐hoc analysis was made with the chi‐squared and Tukey–Kramer test. Results CS with factor 4.5 results in unchanged image quality compared to the T2 TSE for volunteers and patients (overall image impression: 4.75 vs. 4.20 [P = 0.73] and 4.90 vs. 4.47 [P = 0.44]). The CS 4.5 scan is 167 seconds (–39%) faster than the 3D and 216.5 seconds (–45%) faster than the 2D sequences. No significant differences was found for the diagnostic certainty in the volunteers and patients between 2D TSE and 3D CS 4.5 (P = 0.89 and P = 0.43). A reduction of scan time to 148 seconds (CS 8) was still rated acceptable for most diagnosis. Data Conclusion CS accelerates the 3D T2 without compromising image quality. The 3D sequences offer comparable diagnostic quality to the clinical 2D standard with less scan time (–45%), potentially increasing the productivity of MRI scanners. Level of Evidence: 1 Technical Efficacy: Stage 6 J. Magn. Reson. Imaging 2019;49:e164–e175.

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“…1 Studies have evaluated the advantages of 3D T2WI sequences in brain 2 and head and neck imaging 3,4 ; however, there have only been a small number of studies investigating their value in spine MR imaging. [5][6][7] Most of these studies have compared the visualization of degenerative disease of the lumbar spine on conventional T2-FSE sequences versus 3D T2WI sequences. Lee et al 7 reported no statistically significant difference between the sensitivities of T2-FSE and 3D T2-SPACE for the detection of neural foraminal stenosis, spinal canal stenosis, and nerve compression at 3T.…”

mentioning

confidence: 99%

“…Lee et al 7 reported no statistically significant difference between the sensitivities of T2-FSE and 3D T2-SPACE for the detection of neural foraminal stenosis, spinal canal stenosis, and nerve compression at 3T. Furthermore, Blizzard et al 5 found a high degree of interobserver agreement between T2-FSE and T2-SPACE images for the evaluation of spinal canal stenosis, disc herniation, and degenerative changes. A similar study comparing T2-FSE and T2-SPACE also found high interobserver agreement for the visualization of C-spine degenerative disease.…”

mentioning

confidence: 99%

Diagnostic Quality of 3D T2-SPACE Compared with T2-FSE in the Evaluation of Cervical Spine MRI Anatomy

Chokshi¹,

Sadigh²,

Carpenter³

et al. 2017

AJNR Am J Neuroradiol

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3D-FSE Isotropic MRI of the Lumbar Spine

Cited by 21 publications

References 14 publications

Diagnosis of Nerve Root Compromise of the Lumbar Spine: Evaluation of the Performance of Three-dimensional Isotropic T2-weighted Turbo Spin-Echo SPACE Sequence at 3T

Diagnosis of Nerve Root Compromise of the Lumbar Spine: Evaluation of the Performance of Three-dimensional Isotropic T2-weighted Turbo Spin-Echo SPACE Sequence at 3T

Accelerated MRI of the Lumbar Spine Using Compressed Sensing: Quality and Efficiency

Diagnostic Quality of 3D T2-SPACE Compared with T2-FSE in the Evaluation of Cervical Spine MRI Anatomy

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