Article Figures & Data
Figures
- Fig 1.
A 58-year-old man with post-craniofacial recurrent tumor resection with postsurgical changes. Comparison of C-T2 (A), Q-T2 (B), C-FLAIR (C), and Q-FLAIR (D).
- Fig 2.
An 82-year-old man with extensive periventricular T2 and T2 FLAIR white matter foci suggesting ischemic small vessel changes. Comparison of C-T2 (A), Q-T2 (B), C-FLAIR (C), and Q-FLAIR (A).
Tables
C-T2 Q-T2 C-T2 FLAIR Q-T2 FLAIR TR (ms) 3066 6380 9500 9500 TE (ms) 99 98 190 105 TI (ms) NA NA 2250 2250 FOV (cm) 22 × 22 22 × 22 23 × 23 23 × 23 Matrix 320 × 320 320 × 320 288 × 288 288 × 288 Section thickness (mm) 5 5 5 5 Section spacing (mm) 0 0 0 0 No. of sections 30 30 30 30 Bandwidth (kHz) 50 41 62.5 41 Refocus flip angle 160° 160° 160° 160° Echo-train length 28 16 32 18 NEX 1.7 1.5 1.7 1.5 Acceleration factor 2 2 2 2 Scan time (min) 1.26 2.16 3.10 5.20 Note:—NA indicates not applicable.
Conventional Avg SPL Quiet Avg SPL ΔL = C − Q I = 10ΔL/10 SP = 10ΔL/20 LF = 10ΔL/33.22 = 2ΔL/10 T2 101.5 75.1 26.4 436.5 21 6.2 T2 FLAIR 104.4 75.9 28.5 708 27 7.2 Note:—Avg indicates average; I, intensity factor; SP, sound pressure factor; LF, loudness factor.
