Objective: The aim of this study was to investigate the impact of collimator angle optimization in single-isocenter coplanar volume modulated arc therapy (VMAT) stereotactic radiosurgery (SRS) for ...

Background: In volumetric modulated arc therapy (VMAT), collimator angle selection impacts dose distribution and plan quality. Conventional VMAT plans use dual arcs with collimators set at 0˚. This ...

SPECT imaging using isotopes emitting high-energy gamma or bremsstrahlung photons has important applications in oncology and is used for both diagnosis and therapy monitoring. Examples of applications ...

Coherent Corp. has announced the launch of its 2D Collimator Array, an innovative optical assembly designed for use in optical circuit switches (OCS), which are increasingly vital for advanced data ...

Abstract: We describe a new approach to the problem of collimator optimization in nuclear medicine; our methodology is illustrated for the challenging case of gallium-67 imaging. Collimator-design ...

Objectives Conventional parallel-hole (LEHR) collimators provide limited efficiency-resolution trade-off for clinical myocardial perfusion imaging (MPI) and are inappropriate for small animal imaging ...

A collimator may be described as a device that focuses or narrows a light beam or a stream of particles to be aligned in a different direction or reduce its cross section. The collimator focuses a ...