Selecting the appropriateimaging method, correctly applying the technique selected, and accurately interpreting the examination are the key steps in imaging ear disorders in dogs and cats.

Conventional screen-film radiography (including positive contrast canalography), computed tomography (CT), and magnetic resonance imag­ing (MRI) should be considered complementary techniques, since no single imaging modality perfectly depicts the complex anatomy of the ear.

The physics and instru­mentation that form the basis of these diagnostic procedures will not be discussed. This chapter provides an overview of the indications for and limitations of different modalities, emphasizing the key points in selecting and performing the appropriate studies and interpreting the images. Readers will find the information needed to decide which modality will be most effective in a specific clinical setting. One guideline applies to all imaging described here—general anesthesia is required for a full assessment of the middle and inner ear. Attempting to evaluate these areas with sedation alone or without chemical restraint is an exercise in futility.

More on the topic Selecting the appropriateimaging method, correctly applying the technique selected, and accurately interpreting the examination are the key steps in imaging ear disorders in dogs and cats.:

1. Common ear ailments of dogs and cats can be seen in up to 50% of patients in areas of humid climates during some or all of the patient’s life.
2. Otitis externa is a common malady, occurring in 15% to 20% of dogs and 5% to 7% of cats seen in veterinary practice.
3. Most skin diseases may affect the pinna in dogs and cats, but other parts of the body can also be involved.
4. One of the most common ailments of dogs seen in a veterinary practice is ear disease.
5. Reference ranges for haematology and ser­um chemistry values for adult cats and dogs
6. Careful examination of a clean, dry ear canal in a dog or cat with otitis externa may reveal many conditions that affect the ear canal.
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9. Examination of the External Ear Canal
10. EAR DISORDERS