Because of its low binding to tissues that express low EGFR, such as skin, a nimotuzumab immunoPET agent may be potentially advantageous over 89Zr-DFO-cetuximab or 89Zr-DFO-panitumumab probes as the low off target binding may provide a more favorable dosimetry and unequivocal delineation of secondary lesions in organs such as the liver that express low EGFR and are frequent metastatic sites for many EGFR positive cancers. Here, EGFR is linked to cancer.