| | | | | | | | | 50~74 | | 30 | = | | 1 1 | 20 1 | 30 | 15 | | 20 | | | | | 1 | | | | | | | | | | | | | | | | | | | | | | | | | | | | 50% | | | | | | | | | 1.7% | | | | | | | | | | | | | 25% | | CT X | | | X CT MRI | PET-CT | | | | | | | | | | | | | | | | | | | | | | | CEA | NSE SCC | | | | | | | | | | | | |