VetSkill Level 3 Diploma VN02 – Diagnostic Principles Practice Test

Maintaining complete stillness during scanning is essential for high‑quality images, especially in modalities that are highly motion-sensitive. MRI scans involve long acquisition times and are very susceptible to even tiny movements, such as breathing or twitching, which can blur details. To obtain clear images and avoid repeat sequences, animals are frequently placed under general anaesthesia, providing a controlled, immobile state with an airway secured.

CT scans, while much faster, still benefit from immobilization to prevent motion artifacts and ensure precise detail, particularly for small or intricate structures. In veterinary practice, general anaesthesia is commonly used to keep the patient still for the duration of the study.

X‑ray and ultrasound are typically quick, and practitioners can often image a cooperative patient without general anaesthesia. Fluoroscopy can be performed with the patient awake or sedated depending on the procedure, and general anaesthesia is not routinely required just for the imaging itself.

So, the imaging modalities that typically require general anaesthesia are MRI and CT.