10 2.2.5 Research diagrams Patient suspected of having solitary pulmonary nodules on radiograph and CT (n = 165) Diagnosis on CT films Description the characteristic solitary pulmonary nodules on chest CT films 131 patients had chest CT before and 60 seconds after injection (delay phase CT) 34 patients had chest CT before injection, 25s, 60s and 240s after injection (dynamic CLVT) Purpose 1 Purpose 2 Biopsy (n=165) Se, Sp, NPV, PPV, Ac Se, Sp, NPV, PPV, Ac Surgery (n=36) 11 Chapter 3 RESEARCH RESULTS 3.1.