Cns Csfield

CSI

Craniospinal irradiation technique
A: patient setup (not shown)
B: Lateral view showing cranial field rotated to align with the diverging border of the spinal field
C: Couch rotated to provide match between the spinal field and the diverging border of the cranial-field
D: Elimination of the cranial field divergence by using an independent jaw as a beam splitter. (alternative to couch rotation in C).