Initial inventory of nodules in the images is the first step in evaluating presence of nodules in performing computer-aided diagnostic (CAD) technique of diagnosis, especially of lung nodules. Which can be truly evaluated always by a thoracic radiologist of high experience. This is usually identified as targets of the study for examination. However, due to unknown explanations, this truly examination may not be achieved by the radiologists which necessarily makes evaluation changes. Based on the self-experiences faced by the radiologists various diagnosing parameters like number of malignant nodules based on their various sizes, location of nodules, and type of lung cancer was recorded during the study, number of nodules falling under the size range of 3-10 mm included 21 nodules, 11-20 mm of size included 13, 21-30 mm of sized nodules included 3. Based on various locations of nodules within the body, it was reported that 12 nodules have been present in the right upper lobe, 1 was present in right middle lobe, 8 was diagnosed in right lower lobe, 9 were diagnosed under left upper lobe and 6 were present in left lower lobe. The results of the study in evaluating the performance of radiologists conclude that, the radiologists of the study site were similar to that of lung cancer detecting demonstrations of AUC. Anyway further time to time evaluations are required for evaluating radiologists performances and guide them on the modern logics of diagnosis.