“Schuller's view”的意思、由来-开放百科全书

词条

Schuller's view

释义

Structures seen
Observations
References

{{multiple issues|{{Orphan|date=February 2013}}{{unreferenced|date=January 2013}}{{technical|date=January 2013}}
}}

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 angle of 25° caudad to radiographic plate. This angulation prevents overlap of images of two mastoid bones. Radiograph for each mastoid is taken separately. The Schullers view serves as an alternative view to the Law projection which uses a 15 degree angle of patient's face toward the image receptor and a 15 degree caudal angulation of the CR to achieve the same result, a lateral mastoid air cells view without overlap of the opposite side. Ear(pinna) under examination can be taped forward to avoid cartilage shadow around mastoid. Older editions of Merrill's positioning books will have detailed explanation of these and other mastoid positions. Newer texts often omit this because of the rarity of this exam in lieu of computed tomography studies.

Structures seen

Mastoid air cells
External auditory canal
Tympanic cavity
Temporomandibular joint
Dural plate
Sinus plate
Dense bone of labyrinth

Observations

Observation	Description
Pneumatic Air cells cover mastoid Air cells seen beyond dural and sinus plates
Moderate Air cells cover mastoid Air cells not seen beyond dural and sinus plates
Sclerotic Absence of air cells Whole antrum appears small in size Marked radiopacity Can be seen in individuals suffering from chronic otitis media as well as in normal individuals
Radiolucent mastoid Single radiolucent shadow is seen. It can be present in sclerotic as well as normal mastoid Differential diagnosis: Cholesteatoma Operated mastoidectomy Large antral cell Large peri-antral cell Malignancy Chronic mastoiditis with granulations Eosinophilic granuloma Tuberculosis Multiple myeloma Skull metastases from kidney, bronchus, breast etc.

References

3 : Radiology|Radiography|Ear surgery

随便看

开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。