Title of article :
Computerized assessment of the mastoid air cell system
Author/Authors :
Michio Isono، نويسنده , , Kiyotaka Murata، نويسنده , , Hiroji Azuma، نويسنده , , Masahiro Ishikawa، نويسنده , , Akihiko Ito، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 1999
Pages :
7
From page :
139
To page :
145
Abstract :
There have been many arguments on the development of pneumatization of temporal bone. However, a technique for direct volume measurement from high resolution computed tomography has never been reported. The aim of this paper is to develop a technique by using digital image processing to measure the volume of the mastoid air cell system. Forty three ears of 26 healthy subjects (13 males and 13 females) without a history of chronic or exudative otitis media, clear signs of Meniereʹs disease, severe sensorineural hearing impairment or malformation of temporal bone were eligible for enrolment in this study. Using a digital image processing technique, only the black air cells and tympanic cavity on the CT films are easily selected. Then, after image processing, only areas of these extracted black pneumatized parts are calculated. Consequently, the volume of pneumatized parts of temporal bone could be calculated separately as total volume and as partial volume that divided by several CT planes. The average volume of pneumatization in 43 temporal bones was 5.97 ml. However, since the volume of pneumatization in the temporal bone has traditionally been estimated by analyzing areas on X-ray films, the new method described in this study is significant for its ability to directly measure the volume of pneumatization in the temporal bone.
Keywords :
image processing , Binary system , Temporal bone , Mastoid air cell system
Journal title :
Auris Nasus Larynx
Serial Year :
1999
Journal title :
Auris Nasus Larynx
Record number :
567252
Link To Document :
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