Which diagnostic imaging modalities are most useful in evaluating senior dogs with mobility or organ concerns?

• A. Radiographs for bones and chest, abdominal ultrasound, echocardiography when cardiac disease suspected; MRI/CT as indicated
• B. Radiographs for bones only
• C. MRI only
• D. CT only

Answer: (A)

Evaluating senior dogs with mobility or organ concerns requires a broad imaging approach that surveys the skeleton, chest, and abdominal organs, with targeted cardiac evaluation when needed. Starting with radiographs lets you quickly assess bone integrity for arthritis or fractures and evaluate the chest for heart size and lung conditions. An abdominal ultrasound adds real-time assessment of the major organs, helping detect masses, stones, enlarged organs, or fluid. If cardiac disease is suspected, echocardiography provides detailed information on heart structure and function beyond what radiographs show. MRI or CT are more specialized tools used when detailed imaging of soft tissues or complex anatomy is needed, rather than as a first-line, broad-screen approach. This combination covers the most common and important sources of issues in older dogs, making it the most useful overall.