Novel imaging probes

A fluorinated or paramagnetic polyuronide polymer comprising a polymer of Formula I, II , III or IV

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• and pharmaceutically acceptable salts thereof for the polymers that are capable of forming salts, wherein
• for Formula I:
• R1 represents OH, OX, X;
• R2 represents OH, OX, X;
• R3 represents OH, OY, OX, NHX, alkyl, alkoxyalkyl;
• R4 represents C═O, CH2, CNX, CF2;
• for Formula II:
• R1 represents OH, OX, X, OR4;
• R2 represents OH, OX, X, OR4;
• R3 represents OH, Y, X;
• R4=acyl, alkly or aryl
• for Formula III:
• R1 represents OH, OX, X;
• R2 represents OH, OX, X;
• R3 represents H, N(X)3;
• for Formula IV:
• R1 represents OH, OX, X;
• R2 represents OH, OX, X, —OA(X)O— or OA(R5)O—;
• R5 represents alkyl or acyl and A represents a non-paramagnetic ion
• wherein M is any paramagnetic ion of the transition metal or lanthanide series, and “a” is a whole number and “b” is 1/a;
• wherein for all of the formulas I-IV
• X represents a fluorine containing moiety, a luminescent residue, a fluorescent residue, a fluorinated luminescent residue or a fluorinated fluorescent residue;
• Y represents CH2C(OH)CH3;
• m, p, x, y, z represents 0-150;
• and
• n is from 10-10,000 inclusive.