ArticleBMC medical imaging2025
Comparison of radial versus cartesian k-space sampling in T1-weighted MRI: image quality assessment for contrast-enhanced thoracic spine transverse imaging.
Article in BMC medical imaging, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundMotion artifacts caused by respiration, cardiac pulsation, and vascular flow often degrade image quality in conventional contrast-enhanced transverse T1-weighted magnetic resonance imaging (MRI) of the thoracic spine, hindering lesion detection and characterization. Although radial k-space sampling sequences have demonstrated strong motion artifact suppression through non-Cartesian acquisition trajectories, their clinical value in contrast-enhanced thoracic spine MRI remains unverified. This study aimed to evaluate the clinical utility of the free-breathing radial k-space sampling sequence for contrast-enhanced transverse T1-weighted MRI of thoracic spine.
methodsTotal of 48 patients with thoracic vertebral lesions enrolled in this prospectively study underwent contrast-enhanced thoracic spine examination on a 3T MRI scanner from July 2024 to March 2025. After contrast administration, three transverse sequences, including conventional two-dimensional T1-weighted imaging with modified Dixon turbo spin echo (2D T1WI-mDixon-TSE), breath-hold three-dimensional T1-weighted imaging with modified Dixon gradient echo (3D T1WI-mDixon-GRE), and free-breathing 3D volumetric accelerated navigator echo with extended dynamic range (3D VANE XD) were acquired. Signal-to-noise ratio (SNR) was measured at the central slice. Two radiologists independently scored artifact suppression, thoracic vertebra/lesion clarity and overall image quality using a 4-point Likert scale. The differences in SNR and subjective evaluation scores among above three sequences were compared and analyzed.
resultsThe free-breathing 3D VANE XD and 3D T1WI-mDixon-GRE sequences achieved significantly higher SNR than 2D T1WI-mDixon-TSE sequence (both p < 0.01). In the subjective evaluation of artifact suppression, the free-breathing 3D VANE XD sequence also scored highest [3.90(3.81, 3.95)], followed by the breath-hold 3D T1WI-mDixon-GRE [3.55(3.50, 3.70)] and 2D T1WI-mDixon-TSE sequences [2.90(2.75, 3.08)]. For the clarity of thoracic vertebra and lesion, the free-breathing 3D VANE XD sequence scored significantly highest (both p < 0.01). And the overall image quality of free-breathing 3D VANE XD sequence was significantly best [3.90 (3.85, 3.95)] than the other two sequences (both p < 0.01).
conclusionThe free-breathing 3D VANE XD sequence significantly improved the image quality of contrast-enhanced transverse T1-weighted MRI for thoracic spine, supporting its integration into routine clinical practice.
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