Trays for positioning of an object within an imaging coil for imaging procedures. Tray embodiments include a body having sides, ends, an object-supporting wall between the sides and at least one protrusion extending laterally outward from each side of the body. The protrusions cooperate with the structure of the particular imaging coil to locate the tray at a proper imaging position within the imaging coil. Patient-immobilization devices and object-holding devices may be associated with the trays. The trays enable off-the-shelf imaging coils to be adapted for use with an expanded number of patient-immobilization devices and object-holding devices.