Figure 2. T1 weighted axial MR scan in the region of the upper pons, demonstrating a small brainstem cavernous angioma. The angioma is surrounded by a haemosiderin ring (black on scan), which follows chronic blood seepage into the normal surrounding brain from the angioma over time.
Figure 3. Gadolinium enhanced, T1 weighted, coronal MR scans of an acoustic neuroma (a) before and (b) after radiosurgery, demonstrating unusually dramatic shrinkage. Audiograms (c) before and (d) after demonstrate the exceptionally good return of hearing in this patient following this therapy.
Figure 4. Mean serum growth hormone levels over time (each data point being the mean value of a five point day curve) in a population of previously irradiated (conventionally fractionated to a minimum dose of 45 Gy) patients with acromegaly, who had failed this therapy (in terms of growth hormone normalization or subsequent rise) and who were then treated by linac radiosurgery (data from Swords et al [35]).
