As in the prior editions of this book, the protocols for computed tomography, magnetic resonance imaging, digital subtraction angiography, and myelography are provided in this section. These protocols should serve as general guidelines, may vary from those utilized in other imaging centers, and need to be adapted to the needs of the readers and their patients. Care dose refers to our equipment radiation reduction feature. Indications refer to the most common ones and are not all-inclusive. We use Iohexol for our examinations (300 mg/ml for pediatric and 350 mg/ml for adults) and doses and concentrations are based on it. I have also included the charge codes that we use (obviously this will be applicable only in the USA).