A patient has an ongoing history of cancer. She has a tumor in the abdominal region, and has been undergoing treatment for it. There may be other tumors and a potential blockage in the surrounding area that need to be investigated. The imaging technique that might provide the most information in this case is .

A CT scan produces detailed cross-sectional images of the abdomen, so it can show the known tumor and help identify other tumors or a possible blockage. Fluoroscopy shows moving X-ray images and is useful for certain real-time studies, while basic radiography gives less detailed information about abdominal masses.

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