Which imaging modality is most useful for evaluating soft tissue organs such as the liver and spleen?

• A. Ultrasonography
• B. X-ray
• C. MRI
• D. PET scan

Answer: (A)

For evaluating soft tissue organs like the liver and spleen, ultrasonography is the most useful starting imaging modality because it provides real-time visualization of organ size, structure, and any focal abnormalities without radiation. It can assess parenchymal texture, detect cysts, masses, or abscesses, and evaluate blood flow with Doppler, all in a rapid, bedside, and cost-effective way. While MRI offers superior soft-tissue contrast and detailed characterization of lesions, it is more expensive, time-consuming, and less accessible as an initial test. X-ray gives limited soft tissue detail, and PET scans focus on metabolic activity rather than anatomy, making them less suitable for routine evaluation of these organs.