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KMID : 0616619980040010141
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Journal of Soonchunhyang Medical College
1998 Volume.4 No. 1 p.141 ~ p.148
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Comparison of Plain Radiographs and OMU CT Scans in Children with Chronic Sinusitis
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Abstract
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Most commonly and widely used diagnostic tool for chronic paranasal sinusitis in children is plain X-ray check not only because of small radiation dose and easy performance, but because of low cost.
However ostiomeatal unit computed tomography(OMU CT) was known to be more accurate and recommended recently by many physicians. The author have studied for both OMU CT and plain X-ray of paranasal sinuses and compaired their findings in 90 children(180 sides of sinus) aged from 4 to 14 years who suspected having sinusitis.
OMU CT was taken after plain X-ray examination (Caldwell´s view, water´s view, lateral view), and the time interval between these two examination was 0 to 14 days (average 4.7 days). The following results were obtained.
Considering that OMU CT was accurate, the rate of correspondence in diagnosis of sinus pathology between plain X-ray and OMU CT was 48.3% in the ethmoid sinus, 51.1% in the maxillary sinus, 41.9% in the sphenoid sinus, 43.4% in the frontal sinus.
If all OMU CT findings had been accurate, the incidence of false positives according to plain X-ray was 25.5% in the ethmoid sinus, 28.3% in the maxillary sinus, 70.8% in the sphenoid sinus and 77.8% in the frontal sinus.
While, the incidence of false negatives according to plain X-ray was 85.9% in the ethmoid sinus, 70.5% in the maxillary sinus, 50.0% in the sphenoid sinus and 37.5% in the frontal sinus.
A routine preoperative OMU CT is recommended, which allows a detailed evaluation of pathologic changes and anatomical relations of the paranasal sinuses before surgical intervention for the paranasal sinuses.
Considering the above facts, diagnosis of pediatric sinusitis only by plain X-ray was inadequate and OMU CT was necessary.
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