Kathleen Vunckx Michel Defrise Dirk Beque Christian Vanhove Andriy Andreyev Johan Nuyts Geometrical calibration and aperture configuration design in multi-pinhole SPECT. 1403-1406 2008 ISBI http://dx.doi.org/10.1109/ISBI.2008.4541268 conf/isbi/2008 db/conf/isbi/isbi2008.html#VunckxDBVAN08