Fig. 3. Mid-sagittal anatomy of buccal mass and radular stalk measurements. Key
anatomical features visible in mid-sagittal fixed tissue (A) and in
high-spatial-resolution magnetic resonance (MR) images (B) are indicated. The
features outlined in the high-temporal-resolution MR images (see
Fig. 4) are visible. To create
a reference length for measurements that could be reliably measured on the
high-temporal-resolution MR images, the length of the inner width of the
radular stalk was used. To relate this width to external measurements of
radular stalk width, we measured the ratio of the outer to the inner widths in
fixed tissue (A), in high-resolution MR images (B) and in freshly dissected
tissue (not shown). (C) Radular stalk shape based on a three-dimensional
reconstruction of high-resolution MR images. (D) Mid-sagittal view of radular
stalk shape based on the three-dimensional reconstruction shown in C.
