A system comprising: - an apparatus for collecting aerosolized respirable particles of an inhalable medicinal formulation, comprising an inlet for receiving an aerosolized dose of the medicinal formulation, a suction source for generating a pneumatic flow through the apparatus, a channel defining a pathway extending from said inlet to said suction source, and a dose collection section located in said pathway of said pneumatic flow through the apparatus, said dose collection section having an air-permeable filter (F), said filter (F) extending across the pathway of said aerosolized respirable particles so as to retain particulate material therein on said filter (F), said dose collection section comprising: - an upper filter support member and a lower filter support member , said filter (F) being circumferentially retained between said upper and lower support members (40; 50) to form a filter unit, - a lower body receiving said filter unit, said lower body having a top surface comprising recesses located around said filter unit, - a quick-release system comprising fixing means , such as hooks, movable between an open position and a closed position, wherein said fixing means , in said open position, can enter said recesses around said filter unit, and in said closed position, said fixing means can grab said filter unit, thus allowing removal of said filter unit from said lower body without any human contact on said filter unit. - an apparatus for collecting aerosolized respirable particles of an inhalable medicinal formulation, comprising an inlet for receiving an aerosolized dose of the medicinal formulation, a suction source for generating a pneumatic flow through the apparatus, a channel defining a pathway extending from said inlet to said suction source, and a dose collection section located in said pathway of said pneumatic flow through the apparatus, said dose collection section having an air-permeable filter (F), said filter (F) extending across the pathway of said aerosolized respirable particles so as to retain particulate material therein on said filter (F), said dose collection section comprising: - an upper filter support member and a lower filter support member , said filter (F) being circumferentially retained between said upper and lower support members (40; 50) to form a filter unit, - a lower body receiving said filter unit, said lower body having a top surface comprising recesses located around said filter unit, - an upper filter support member and a lower filter support member , said filter (F) being circumferentially retained between said upper and lower support members (40; 50) to form a filter unit, - a lower body receiving said filter unit, said lower body having a top surface comprising recesses located around said filter unit, - a quick-release system comprising fixing means , such as hooks, movable between an open position and a closed position, wherein said fixing means , in said open position, can enter said recesses around said filter unit, and in said closed position, said fixing means can grab said filter unit, thus allowing removal of said filter unit from said lower body without any human contact on said filter unit. <EOS>