GPC1 and neoplasm: FI signal intensity ORI‐GPC1‐NP/ORI‐NP in PDAC ≈ 2.5 (24 hr p.i.) MRI signal intensity ORI‐GPC1‐NP/ORI‐NP in PDAC ≈ 2.1 (24 hr p.i.) tumor weight ratio ORI‐GPC1‐NP/ORI‐NP ≈ 0.27 tumor weight ratio ORI‐GPC1‐NP/ORI ≈ 0.36 (after 14 days) tumor weight ratio ORI‐GPC1‐NP/GEM ≈ 0.5 (after 14 days)