Performance comparison of two commercial BGO-based PET/CT scanners using NEMA NU 2-2001. - Bolard, Grégory; Prior, John O.; Modolo, Luca; Bischof Delaloye, Angelika; Kosinski, Marek; Wastiel, Claude; Malterre, Jérôme; Bulling, Shelley; Bochud, François; Verdun, Francis R. (Medical Physics, 2007)