Figure 14.

Schematic figure showing the accelerating/decelerating process of volumetric change in a pituitary adenoma that initially progressed and finally regressed. The process is divided into a transient swelling phase (checkerboard), rapid-shrinking phase (broken-lined), slow-shrinking (obliquely dashed) and steady phase (transversely dashed). Magnetic resonance images corresponding to each phase are demonstrated from left to right. In the steady phase the rate of volume change became approximately zero with time.