Fig. 2

Distributions of 19 detected standard amino acids in a representative mouse-xenograft lung tumor tissue at 30 min after ¹³C₆-Phe injection. All pixels were normalized to their root mean square value. The co-registered, hematoxylin and eosin stained (H&E) image shows the different histomorphological components of the tissue: viable tumor (yellow), non-viable tumor fraction (necrosis, green), and non-viable tumor region (hemorrhage, red)