Which factor contributes to MRI being less commonly used in veterinary medicine for bone tumors?

• A. It is very sensitive but NOT specific
• B. It images larger body regions than CT
• C. It is the most expensive modality
• D. It does not require anesthesia

Answer: (C)

Imaging modality choice for bone tumors in veterinary patients is driven largely by practicality and cost. MRI offers superb soft-tissue and marrow detail that can help define tumor extent and plan surgery, but its routine use is limited by expense and logistics: the equipment is very costly, scans take longer, and they typically require general anesthesia and specialized personnel. In contrast, CT and radiographs provide essential anatomic information about bone destruction quickly and at a fraction of the cost, making them the more practical first-line choices. So, the main reason MRI is less commonly used is that it is the most expensive modality.

The other options don’t fit as well: although MRI can be highly sensitive, specificity varies and isn’t the primary limiting factor; MRI often does require anesthesia in veterinary patients, not the opposite; and while MRI can image large regions, this isn’t the core reason it’s less commonly used compared with the cost and logistical constraints.