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. 2021 Jul 27;301(1):187–194. doi: 10.1148/radiol.2021203036

Figure 2:

Examples of presurgical midsagittal plane displacement encoding with stimulated echoes MRI sets (each image set contains 22 frames obtained over the cardiac cycle) in participant 6, a 42-year-old woman with Chiari malformation type I. (A) Magnitude reconstruction (from cardiac frame 1/22) shows brainstem (red) and cerebellar mask (blue). (B) Phase image (from cardiac frame 15/22) with displacement encoded in the anteroposterior direction (arrow). (C) Phase image (from cardiac frame 15/22) with displacement encoded in the craniocaudal direction (arrow). B and C demonstrate anteroposterior and craniocaudal displacement from the frames with the peak motion. Bright pixels indicate motion to the right in B and in the caudal direction in C. No contrast agent was used in the study.

Examples of presurgical midsagittal plane displacement encoding with stimulated echoes MRI sets (each image set contains 22 frames obtained over the cardiac cycle) in participant 6, a 42-year-old woman with Chiari malformation type I. (A) Magnitude reconstruction (from cardiac frame 1/22) shows brainstem (red) and cerebellar mask (blue). (B) Phase image (from cardiac frame 15/22) with displacement encoded in the anteroposterior direction (arrow). (C) Phase image (from cardiac frame 15/22) with displacement encoded in the craniocaudal direction (arrow). B and C demonstrate anteroposterior and craniocaudal displacement from the frames with the peak motion. Bright pixels indicate motion to the right in B and in the caudal direction in C. No contrast agent was used in the study.