Fig. 5

The value of large matrices in differentiating adjacent lesions and evaluating the internal details of lesions. A 62-year-old male was diagnosed with rectum adenocarcinoma with parenteral lymph node metastasis (a–j). The metastatic lymph nodes are visible in all sub-figures (pointed by red arrows) in front of the sacrum. On the plot of G192 (a, b), only one hot area with irregular morphology can be seen, but the two adjacent metastatic lymph nodes can be clearly distinguished on G512 (C–F) and G1024 (G–J). A 63-year-old female was diagnosed with pulmonary metastases from adenocarcinoma of the sigmoid colon (k–t). Pulmonary metastases can be clearly seen on all sub-figures (pointed by blue arrows). It could be seen as one homogeneous hot area on the G192 (k–l), but on G512 and G1024, the hypermetabolic zone can be seen mainly in the inner posterior side of the mass