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Schuller's view is a lateral radiographic view of skull principally used for viewing mastoid cells. The central beam of X-rays passes from one side of the head and is at an angle of 25° caudad to the radiographic plate. This angulation prevents overlap of images of the two mastoid bones. The radiograph for each mastoid is taken separately. Schuller's view serves as an alternate view to the Law projection which uses a 15° angle of patient's face toward the image receptor and a 15° caudal angulation of the computed radiography (CR) to achieve the same result, a lateral mastoid air cells view without overlap of the opposite side. Under examination the outer ear (auricle) can be taped forward to avoid a cartilage shadow around mastoid. Older editions of Merrill's Atlas of Radiographic Positioning and Procedures books have detailed explanation of these and other mastoid positions. Newer version of texts often omits this because of the rarity of this exam in lieu of computed tomography (CT scan scans) studies.
