Which imaging modality provides metabolic information to aid cancer management alongside anatomical imaging?

Which imaging modality provides metabolic information to aid cancer management alongside anatomical imaging?

• A. MRI
• B. CT
• C. PET/CT
• D. Ultrasound

Answer: (C)

Metabolic information in cancer imaging comes from techniques that show how tissues use energy, not just how they look. Positron emission tomography detects radiotracers such as FDG that accumulate in cells with high glycolysis, a common feature of cancers. When this metabolic data is fused with precise anatomical detail from CT, you get PET/CT. This combo lets clinicians see where a lesion is and how active it is, improving detection of spread, accurate staging, and early assessment of how well treatment is working. MRI and CT provide strong anatomical detail, and ultrasound shows structure and blood flow, but none routinely offer the widespread metabolic mapping that PET/CT delivers with a radiotracer. Some MRI techniques can infer function, but they don’t provide the same systemic metabolic information as PET/CT.

Metabolic information in cancer imaging comes from techniques that show how tissues use energy, not just how they look. Positron emission tomography detects radiotracers such as FDG that accumulate in cells with high glycolysis, a common feature of cancers. When this metabolic data is fused with precise anatomical detail from CT, you get PET/CT. This combo lets clinicians see where a lesion is and how active it is, improving detection of spread, accurate staging, and early assessment of how well treatment is working.

MRI and CT provide strong anatomical detail, and ultrasound shows structure and blood flow, but none routinely offer the widespread metabolic mapping that PET/CT delivers with a radiotracer. Some MRI techniques can infer function, but they don’t provide the same systemic metabolic information as PET/CT.