To investigate the range of collimation errors in x-ray rooms and to calculate their possible effects on the radiation dose for anteroposterior pelvic examinations. A collimator test tool was ...

Abstract: An analytical method based on the uniform geometrical theory of diffraction (UGTD) for predicting accurately the collimation phase error in a planar phased ...

Abstract: An optically fed phased array must be provided with a means of collimation as well as with a beam steering function. The same phase shifters which are used to steer the beam can be used to ...