The study focuses on Gastric cancer, a type of stomach cancer that can grow locally and spread to other parts of the body. It evaluates the diagnostic agent [18F]FAPI-74, which is given by a small injection and then visualized using a special imaging method called PET/CT. PET/CT is a scan that combines two types of pictures – one that shows how cells use sugar (PET) and another that shows the body’s shape (CT) – to create detailed images. Metastasis means cancer cells have moved away from the original spot to other organs, and lymph nodes are small glands that help fight infection and can be places where cancer spreads. The purpose of the study is to determine how accurately this test can locate the primary tumor, involved lymph nodes, and distant metastasis, as well as to see if it can show the response to treatment given before surgery.
Participants will receive a single dose of the tracer, then undergo the scan a short time later. The images are compared with the findings from tissue analysis after surgery or with routine follow‑up scans to confirm whether the cancer has spread. The study follows each participant from the initial scan through surgery and a one‑year follow‑up period to collect the needed information.
Finland 
