A non-surgical method of delivering a liquid radioactive solution from a source to a recipient comprising the steps of: determining a desired recipient level of radioactivity and recipient volume of the radioactive solution to be delivered to the recipient, providing a first valve having a waste position and a recipient position, providing a bolus conduit, a waste conduit and a recipient conduit, each conduit having a valve end being connected to said first valve, so that the first valve can establish a waste flow path in the waste position and a recipient flow path in the recipient position, the recipient flow path being different from said waste flow path, the bolus conduit comprising a measuring section and an internal volume, the internal volume being approximately equal to the desired recipient volume of the radioactive solution to be delivered to the recipient, arranging said first valve in the waste position, transporting a first amount of said radioactive solution through said waste flow path, the first amount of said radioactive solution having an initial level of radioactivity that is at least approximately equal to or higher than the desired recipient level of radioactivity and an initial volume that is larger than the internal volume of said bolus conduit, providing a radiation detector, the radiation detector being operable to measure a level of radioactivity of the radioactive solution in said measuring section, measuring a reference level of radioactivity of said radioactive solution present in said measuring section, wherein when the reference level of radioactivity is approximately equal to an injection level of radioactivity, the method further comprises the steps of: arranging the first valve in the recipient position, and transporting the radioactive solution present in the bolus conduit through the recipient flow path.Un procédé non chirurgical d'administration d'une solution radioactive liquide depuis une source à un destinataire comprend les é
