La gamma-caméra à détection de coïncidence: i. principe, compromis, utilisation pour la scintigraphie conventionnelle

Coincidence detection using a cornantional gamma-camera (CDET) has been proposed for almost a year by several firms with the aim of positron imaging. Namely 18 F-FDG scanning, in nuclear medicine departements. The authors obtained a CDET machine in June 1997. This first article is a survey or the principles of this technique, the optimisations which are required and the choices made by the builder and the users. The consequences of these adaptations on the quality of conventional scintiscans perfomed on the CDET machine are finally adressed