Perfusion CT can identify a subgroup of patients with 'target mismatch', who cannot be identified on clinical/non-contrast CT criteria alone.
In cases of findings on the flat-panel CT component without increased uptake in SPECT, the findings were evaluated based on CT criteria only (sclerosis, residual fissures, etc.; see above).
Multiple publications provide evidence that even in patients with lymph nodes under 1 cm (which had been termed N0 by CT criteria), with the use of EBUS-TBNA a large percentage could still be shown to have N2/N3 disease (some despite also being negative on PET-CT) [16, 17, 18].
CT criteria include pleural soft tissue thickening and/or nodules.
Brain lesions were classified according to the Marshall computed tomography (CT) criteria [ 32].
Recently, Ferrandina developed a predictive score based on CT criteria as well as performance status [ 9].
Recently, other morphology-based CT criteria have been proposed for tumor response assessment.
CT criteria for lymph node metastases theoretically include morphological features such as nodal attenuation and margination.
The CT criteria for metastases were nodes >1 cm, round shape, rim enhancement and central necrosis.
Therefore, Choi et al. introduced CT criteria additionally addressing changes in lesion density.
CT criteria have been developed which are used to select patients for primary surgery [ 9].
