Article Figures & Data
Figures
- Fig 1.
Region-of-interest measurements in the phantom.
- Fig 2.
The region-of-interest measurements in a volunteer.
- Fig 3.
The mean nonuniformity of the 10 volunteers for each sequence.
- Fig 4.
T1-weighted sequences (60-year-old female patient) showing degenerative changes, hemangioma at T1. A, T1, original sequence. B, Two averages. C, One average. D, Acceleration factor 2. E, Acceleration factor 3.
- Fig 5.
T2-weighted sequences (53-year-old female volunteer) showing a small hernia of the C5/6 disk. A, T2, original sequence. B, One average. C, Acceleration factor 2. D, Acceleration factor 3.
- Fig 6.
Axial T2* GRE sequences (46-year-old female patient) showing posterolateral disk herniation with compression of the spinal cord. A, T2* GRE, original sequence. B, Acceleration factor 2. C, Acceleration factor 3.
- Fig 7.
T2TIRM sequences (45-year-old male patient) showing slight edema of C5 due to disk degeneration and minor endplate edema of C5 (Modic type I). A, T2TIRM, original sequence. B, Acceleration factor 2. C, Acceleration factor 3.
Tables
Imaging parameters and examination times
Sequence Sagittal T1WI Sagittal T2WI Sagittal T2TIRM Axial T2* GRE TR (ms) 600 3000 3000 1300 TE (ms) 10 109 32 14 Flip angle 160° 180° 140° 30° Section thickness (mm) 3 3 3 3 Gap (mm) 3.3 3.3 3.3 3.3 NEX 3 2 1 1 ETL 53 31 7 1 Matrix (reconstruction) 384 × 306 320 × 320 640 × 640 512 × 512 Matrix (acquisition) 384 × 260 320 × 256 320 × 240 256 × 256 FOV 191 × 240 240 × 240 240 × 240 160 × 160 Time (min/sec) Nonaccelerated (original) 03:10 03:06 03:24 08:19 2 Averages (% reduction) 02:06 (33.7%) 1 average 01:03 (67%) 01:30 (54%) Acc 2 01:36 (49.5%) 01:31 (53.4%) 01:48 (47%) 04:24 (47%) Acc 3 01:04 (66.4%) 01:07 (66%) 01:15 (63%) 03:06 (63%) Acc 4 01:00 (68.8%) 00:55 (67.6%) 00:57 (72%) 02:27 (74.5%) -
Note:—ETL indicates echo-train length; Acc, acceleration factor.
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