Fig. 5

Illustration depicting the target lesion measurement in NSCLC by RECIST and Lee’s criteria. According to RECIST criteria, the size of the target lesion in lung cancer is measured by including both solid and ground-glass opacity (GGO) components (a). According to Lee’s criteria, the size of the target lesion is measured by solid component alone on soft tissue window imaging (b). If the target lesion has intratumoral cavitation, the size of the target lesion is measured by including only the soft-tissue component and excluding the air component (subtraction of cavity diameter from the longest diameter of tumor mass) (b - c)