Title:Using the Compressed Sensing Technique for Lumbar Vertebrae Imaging: Comparison with Conventional Parallel Imaging
Volume: 17
Author(s): Tianyang Gao, Zhao Lu, Fengzhe Wang, Heng Zhao, Jiazheng Wang and Shinong Pan*
Affiliation:
- Department of Radiology, Shengjing Hospital of China Medical University, Shenyang, Liaoning,China
Keywords:
Lumbar vertebrae, nerve root, magnetic resonance imaging, compressed SENSE, turbo spin-echo, radiofrequency
(RF).
Abstract:
Objective: To compare conventional sensitivity encoding turbo spin-echo (SENSE-TSE)
with compressed sensing plus SENSE turbo spin-echo (CS-TSE) in lumbar vertebrae magnetic resonance
imaging (MRI).
Methods: This retrospective study of lumbar vertebrae MRI included 600 patients; 300 patients received
SENSE-TSE and 300 patients received CS-TSE. The SENSE acceleration factor was 1.4 for
T1WI, 1.7 for T2WI, and 1.7 for PDWI. The CS total acceleration factor was 2.4, 3.6, 4.0, and 4.0
for T1WI, T2WI, PDWI sagittal, and T2WI transverse, respectively. The image quality of each
MRI sequence was evaluated objectively by the signal-to-noise ratio (SNR) and contrast-to-noise
ratio (CNR) and subjectively on a five-point scale. Two radiologists independently reviewed the
MRI sequences of the 300 patients receiving CS-TSE, and their diagnostic consistency was evaluated.
The degree of intervertebral foraminal stenosis and nerve root compression was assessed using
the T1WI sagittal and T2WI transverse images.
Results: The scan time was reduced from 7 min 28 s to 4 min 26 s with CS-TSE. The median score
of nerve root image quality was 5 (p > 0.05). The diagnostic consistency using CS-TSE images between
the two radiologists was high for diagnosing lumbar diseases (κ > 0.75) and for evaluating
the degree of lumbar foraminal stenosis and nerve root compression (κ = 0.882). No differences between
SENSE-TSE and CS-TSE were observed for sensitivity, specificity, positive predictive value,
or negative predictive value.
Conclusion: CS-TSE has the potential for diagnosing lumbar vertebrae and disc disorders.
