This study aimed to evaluate multiacquisition with variable resonance image combination selective short tau inversion recovery (MAVRIC SL STIR) for metallic artifact reduction in magnetic resonance imaging (MRI) of postoperative cervical spine with artificial disk replacement.Methods: A porcine cervical spine with artificial disk replacement was subject to 3 T MRI with variable fat-suppressed fluid-sensitive sequences. Five volunteers underwent MRI with MAVRIC SL STIR and STIR. Quantitative and qualitative analyses were performed for metallic artifact reduction.Results: MAVRIC SL STIR showed the least signal void areas in the tissue phantom and volunteer study. In the tissue phantom study, MAVRIC SL STIR showed the best visualization of anatomic structure, least distortion, and signal pile-up. However, it ranked last for the homogeneity of fat suppression among sequences. In the volunteer study, MAVRIC SL STIR showed better visualization of anatomic structure and lesser distortion, but showed worse image quality of the spinal cord than STIR in the sagittal plane ( P < 0.05).Conclusions: MAVRIC SL STIR might be useful for visualization of anatomy by reduction of signal void areas and distortion in the operated site but should be used as a complement to STIR for evaluation of the spinal cord signal change.
This study aimed to compare the eyes of beautiful women and femme fatales depicted in Western portraits. A total of 37 samples were collected; 19 beautiful women and 18 femme fatales. Nine aspects were measured in reference to the corneal horizontal diameter. The estimated corneal vertical diameter was calculated by a corneal horizontal diameter multiply constant, 1.11.The double-fold was observed in 89% (17 of 19) of the beautiful women and 83% (15 of 18) of the femme fatales. The eye-width ratio was 2.42 (SD, 0.28) in the beautiful women and 2.31 (SD, 0.34) in the femme fatales. The eye-height ratio was 0.91 (SD, 0.18) in the beautiful women and 0.84 (SD, 0.10) in the femme fatales. Eyebrow-to-upper lid distance was 0.92 (SD, 0.35) in the beautiful women and 0.89 (SD, 0.23) in the femme fatales. The interpupillary distance was 5.00 (SD, 0.46) in the beautiful women and 5.00 (SD, 0.71) in the femme fatales. The intercanthal distance was 2.72 (SD, 0.42) in the beautiful women and 2.78 (SD, 0.73) in the femme fatales The outer canthal distance was 7.32 (SD, 0.64) in the beautiful women and 7.20 (SD, 1.01) in the femme fatales. The ptosis amount was -0.01 (SD, 0.18) in the beautiful women and 0.06 (SD, 0.01) in the femme fatales. For the above 7 measurements, there were no significant differences between the 2 groups (P > 0.05, t test).It is noteworthy that the beautiful women and femme fatales have the same interpupillary distance (5.00). Also, the ptosis ratio was almost zero in both groups (-0.01 [SD, 0.18] in the beautiful women and 0.06 [SD, 0.01] in the femme fatales). The results of this study might be of some reference in performing eyelid surgeries especially in brow lifts or canthoplasties.
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