A multi-layer printable thermoplastic film consisting of at least a fluoride polymer film having laminated thereto a polycarbonate film. The handle portion can be positioned relative to an angle of the head portion. Such peptide derivatives are readily labeled with radiometals, such as isotopes of rhenium or technetium, while retaining their ability to tightly bind specific peptide receptors. The detector for AGC can continuously and effectively detect an output swing of the VGA.