Clinical Evaluation of GRAPE Model for Gastric Cancer Screening

This study is testing an AI-based screening model called GRAPE that can analyze routine CT scan images to identify patterns that may indicate gastric cancer (stomach cancer) — potentially detecting it earlier than current methods, even when the CT scan was ordered for other reasons. Early detection of stomach cancer significantly improves treatment outcomes. **You may be eligible if...** - You are 18 to 80 years old - You are already scheduled to have a chest or abdominal CT scan for any reason - You are willing to participate and sign a consent form **You may NOT be eligible if...** - You have already been diagnosed with gastric (stomach) cancer - You have severe intellectual disabilities or communication difficulties that prevent you from understanding or participating in the study Talk to your doctor to see if this trial is right for you.