Imaging compositions

A composition comprising:

• a polymer or oligomer formed from first reacting:
• a) one or more monomers of Formula (A1) and optionally one or more monomers of Formula (A2);
• b) one or more monomers of Formula (B1) or (B2);
• c) one or more monomers of Formula (F);
• d) one or more monomers comprising an MRI contrast agent of Formula (J1), (J2), (J3), (J4), (J5), or (J6), and
• optionally one or more other reactants or monomers;
• such that the polymer or oligomer has the one or more monomers comprising an MRI contrast agent as a part of a backbone of the polymer or oligomer,
• wherein the one or more monomers comprising an MRI contrast agent participate in a condensation polymerization reaction to form the polymer or oligomer;
• wherein the formed polymer or oligomer is then crosslinked to form a polymer network,
• HO-[M]-OH (J1),
• HOOC-[M]-COOH (J2),
• H2N-[M]-NH2 (J3),
• HO-[M]-COOH (J4),
• HO-[M]-NH2 (J5),
• HOOC-[M]-NH2 (J6),
• wherein X1, X2, and X3 are each independently O or NH;
• R1, R2, and R3 are each independently H, a C1 to C22 alkyl or alkenyl group, or M+;
• R4 is H, a C1 to C22 alkyl or alkenyl group, or M+;
• R5 is C(O)R23;
• M+ is a monovalent metal cation;
• R6 is H, NH2, OH, OCH3, OCH2CH3, CH3, or CH2CH3;
• R7 is H or a C1 to C23 alkyl or alkenyl group;
• R8 is H, a C3 to C22 alkyl or alkenyl group, CH2CH2OH, or CH2CH2NH2;
• R15 is an amino acid side chain;
• R23 is a C14 to C22 alkyl or alkenyl group;
• [M] is a metal-containing portion of the MRI contrast agent;
• wherein n is integer ranging from 2 to 20 and
• m is integer ranging from 1 to 20.