X-ray collimators, and related systems and methods involving such colimators

X-ray collimators, and related systems and methods involving such collimators are provided. In this regard, a representative X-ray collimator includes: a first collimator section (150) including a plurality of passages, each passage extending between first and second surfaces; a second collimator section (152) including a longitudinal passage extending between first and second surfaces (194, 222); and a plurality of collimator apertures (174), wherein each collimator aperture (174) is respectively defined in a first direction between the first and the second surfaces of a respective one of the passages in the first collimator section (150), and wherein each collimator aperture (174) is respectively defined in a second direction between the first and the second surfaces (194, 222) of the longitudinal passage in the second collimator section (152).