[Efficacy of chest CT on the staging and re-staging in patients with small cell lung cancer].

Chest CT revealed to be effective to improve the quality of the staging of lung cancer concerning with the evaluation of intrathoracic lesion. The numbers of patients who had thoracic lesion as the first relapse site were higher in the group which were re-staged without the information of chest CT. The extramural review of the multi-center trial showed the inter-center bias to evaluate CR in spite of using the same X-ray imaging modalities.