Purpose: Recent advances in field-shaping technology and linac multileaf collimator (MLC)
integration have resulted in new approaches to performing stereotactic radiosurgery. We
present a modeling study comparing the absolute dose distributions from three radiosurgery
delivery techniques: a conventional approach utilizing noncoplanar circular arcs, a static
field conformal approach, and a dynamic arc field-shaping approach. In the latter, the MLC
leaves more in a continuous fashion, conforming to the beam's-eye-view projection of the …