title: [Compound technic: the effect on lateral resolution, acoustic shadowing and the detection threshold of calculi].
abstract: The examination under discussion shows the specialities of the compound technique, by example of the octoson machine. When the number of transducers is increased, i.e. as by compound technique, an improvement in the lateral resolution can be recognized. The transducers lying outside the C-curve of the octoson demonstrate the structure very nearly axial. The shadowing of concrements (which is very important for recognition) is only evident when using 1-2 transducers and disappear in the compound technique. By increasing the number of transducers, shadowing behind air and bariumsulphate disappears.
mesh_terms: D000388:Air; D001466:Barium Sulfate; D002137:Calculi / Q000175:diagnosis*; D006801:Humans; D008722:Methods; D008961:Models, Structural; D014159:Transducers; D014465:Ultrasonics / Q000295:instrumentation; D014463:Ultrasonography
chemical_list: D001466:Barium Sulfate
vernacular_title: Compoundtechnik: Einfluss auf das laterale Auflösungsvermögen, die Schallschattenbildung und die Nachweisschwelle von Konkrementen.