Patent ID: 8034898

Claim:
A diagnostic composition comprising a compound having the following formula, or a pharmaceutically acceptable salt thereof: [EMTG] n -[L] m -[C] p wherein m and p are independently one to ten; wherein n is one to five; wherein C is a physiologically compatible metal chelating group; wherein L is a linker; and wherein EMTG is an Extracellular Matrix Targeting Group, wherein said EMTG comprises a cyclic peptide comprising an amino acid sequence selected from: (SEQ. ID NO. 828) W-H-C-Y-T-Y-F-P-H-H-Y-C-V-Y-G; (SEQ. ID NO. 829) G-W-H-C-Y-T-Y-F-P-H-H-Y-C-T-Y-G; (SEQ. ID NO. 830) A-W-H-C-Y-T-Y-F-P-H-H-Y-C-V-Y-G; (SEQ. ID NO. 831) L-W-H-C-Y-T-Y-F-P-H-H-Y-C-V-Y-G; and (SEQ. ID NO. 832) Y-W-H-C-Y-T-Y-F-P-H-H-Y-C-V-Y-G, wherein the C-terminus of the peptide may be amidated or any of the amino acids may be protected, and wherein the peptide has a length of 16 to 30 amino acids.