title: Imaging characteristics of a new low-energy diverging-converging collimator.
mesh_terms: D005069:Evaluation Studies as Topic; D006801:Humans; D008168:Lung; D011868:Radioisotopes; D011877:Radionuclide Imaging / Q000295:instrumentation*; D013667:Technetium; D014978:Xenon
chemical_list: D011868:Radioisotopes; D014978:Xenon; D013667:Technetium