Measure: To estimate the cranial capacity of each skull in the Gizmo, measure the area of the part of the cranium that houses the brain. This part of the cranium is roughly behind the red line in the diagram at right.
Chemical dyes are sometimes injected into patients prior to an MRI (magnetic resonance imaging) to enhance internal images. However, certain widely used MRI dyes may cause a number of side effects, including a serious, potentially fatal disease known as nephrogenic systemic fibrosis, or NSF.
The garden variety MRI is the spin-echo MRI. Spin-echo refers to the type of MRI pulse that is used during the procedure. There are different weightings and spin-echo sequences that radiologists will use depending upon the individual case.