[Experimental investigations into dissolution of size of detail and contrast in the angiotomograms].

A comparative investigation on the resolution of angio-tomography and cut-film changer technique, standard views and direct geometrical radiographic magnification were carried out, using a phantom. Catheters of varying calibre and contrast were tested. The most significant result was the finding that lower concentrations of contrast were necessary to demonstrate small vessels or catheters when using angio-tomography or magnification, than with conventional techniques. It was also shown that angio-tomography and a magnification technique are able to show smaller and less contrasty vessels.