Magnification lymphography.

Magnification lymphography was performed on 37 patients, 22 of whom were suffering from bladder carcinoma, and compared with non-magnification lymphograms by two observers independently. The magnification lymphograms were performed on a Siemens Microfocus Bi 125/3/50 RG tube with a 0.1 mm focal spot. In six of the 37 patients (16%) significant extra information was found on the magnification lymphograms compared to the non-magnification lymphograms. In 31 out of 37 patients (84%), the intranodal detail shown was better in the magnification radiographs. Against the additional information gained must be weighed the disadvantages of magnification lymphography which include increased radiation dose, lengthening of procedure time, increased cost and the critical nature of exposure factors. In conclusion, magnification lymphography has a place and the disadvantages seem to be outweighed by the advantages.