A semiconductor surface emitting laser includes an active zone comprising quantum well structures separated by spacer layers. A voltage rising from a low level voltage to a reset voltage of a reset period of a subsequent subfield is applied to a scan electrode, without having a sustain period, after performing an address operation of the subfield with the minimum weight. Next, the bitlines are precharged to a predefined voltage. A simplified user interface provides one contrast agent imaging mode without a need to switch between multiple modes or contrast agent detection techniques and associated contrast agent imaging parameters. The compositions of the present invention may optionally contain at least one thickening agent, at least one alkaline agent, at least one fatty substance, at least one salt, and at least one oxidizing agent.