Author/Authors :
Naghibi، Saeed نويسنده Department of Radiology, Islamic Azad University, Mashhad Branch, Mashhad, Iran. , , Seifirad، Sirous نويسنده Department of Radiology, Faculty of Medicine, Mashhad
Branch, Islamic Azad University, Mashhad, Iran , , Adami Dehkordi، Mahboobeh نويسنده Department of Radiology, Faculty of Medicine, Mashhad
Branch, Islamic Azad University, Mashhad, Iran , , Einolghozati، Sasan نويسنده Department of Radiology, Faculty of Medicine, Mashhad
Branch, Islamic Azad University, Mashhad, Iran , , Ghaffarian Eidgahi Moghadam، Nafiseh نويسنده Department of Radiology, Faculty of Medicine, Mashhad
Branch, Islamic Azad University, Mashhad, Iran , , Akhavan Rezayat، Amir نويسنده Department of Radiology, Mashhad University of Medical
Sciences, Mashhad, Iran , , Seifirad، Soroush نويسنده Research Fellow, Department of Cardiology, Children Medical Center, Tehran University of Medical Sciences, Tehran, Iran ,
Abstract :
Chronic otitis media (COM) can be treated with tympanoplasty with
or without mastoidectomy. In patients who have undergone middle ear
surgery, three-dimensional spiral computed tomography (CT) scan plays an
important role in optimizing surgical planning. This study was performed
to compare the findings of three-dimensional reconstructed spiral and
conventional CT scan of ossicular chain study in patients with COM.
Fifty patients enrolled in the study underwent plane and three
dimensional CT scan (PHILIPS-MX 8000). Ossicles changes, mastoid cavity,
tympanic cavity, and presence of cholesteatoma were evaluated. Results
of the two methods were then compared and interpreted by a radiologist,
recorded in questionnaires, and analyzed. Logistic regression test and
Kappa coefficient of agreement were used for statistical analyses. Sixty
two ears with COM were found in physical examination. A significant
difference was observed between the findings of the two methods in
ossicle erosion (11.3% in conventional CT vs. 37.1% in spiral CT, P =
0.0001), decrease of mastoid air cells (82.3% in conventional CT vs.
93.5% in spiral CT, P = 0.001), and tympanic cavity opacity (12.9% in
conventional CT vs. 40.3% in spiral CT, P=0.0001). No significant
difference was observed between the findings of the two methods in
ossicle destruction (6.5% conventional CT vs. 56.4% in spiral CT, P =
0.125), and presence of cholesteatoma (3.2% in conventional CT vs. 42%
in spiral CT, P = 0.172). In this study, spiral CT scan demonstrated
ossicle dislocation in 9.6%, decrease of mastoid air cells in 4.8%, and
decrease of volume in the tympanic cavity in 1.6%; whereas, none of
these findings were reported in the patients' conventional CT
scans. Spiral-CT scan is superior to conventional CT in the diagnosis of
lesions in COM before operation. It can be used for detailed evaluation
of ossicular chain in such patients.
