PET is most often combined with CT because malignant tumors show increased uptake of sugar.

PET is most often combined with CT because malignant tumors show increased uptake of sugar.

• A. True
• B. False
• C. Only used with MRI
• D. Only used with Ultrasound

Answer: (A)

Malignant tumors often consume glucose at a higher rate, so using a glucose analog tracer highlights cancerous tissue on PET scans. The tracer (FDG) accumulates where metabolism is elevated, making tumors stand out. Pairing PET with CT adds precise anatomical detail and helps localize these metabolically active areas, while CT also provides attenuation correction for the PET data. This combination enhances detection, staging, and treatment monitoring because you get both metabolic activity and exact structure in one study. That's why the statement is true. It isn’t limited to MRI or ultrasound—PET is commonly fused with CT because CT supplies the structural context that PET alone lacks, and other modalities don’t provide the same metabolic information.

Malignant tumors often consume glucose at a higher rate, so using a glucose analog tracer highlights cancerous tissue on PET scans. The tracer (FDG) accumulates where metabolism is elevated, making tumors stand out. Pairing PET with CT adds precise anatomical detail and helps localize these metabolically active areas, while CT also provides attenuation correction for the PET data. This combination enhances detection, staging, and treatment monitoring because you get both metabolic activity and exact structure in one study.

That's why the statement is true. It isn’t limited to MRI or ultrasound—PET is commonly fused with CT because CT supplies the structural context that PET alone lacks, and other modalities don’t provide the same metabolic information.