CT画像による副鼻腔体積の検討

―上顎洞, 前頭洞, 蝶形骨洞の比較―

抄録

In an attempt to study the distribution pattern and correlation between maxillary, frontal and sphenoid sinus volume, sinus volumes were measured by coronal CT scans of the paranasal sinus. Two hundred and four maxillary sinuses of 102 patients, the frontal sinuses of 62 patients and the sphenoid sinuses of 68 patients with no inflammatory changes detectable on CT scans of the each paranasal sinus and nasal cavity were analyzed. The volumes of the maxillary sinus showed a normal distribution, and its mean volume and standard deviation were 20.5±9.2cm³. The logarithms of both frontal and sphenoid sinus volumes exhibited a normal distribution. The mean volume of the frontal sinus and the sphenoid sinus, which were calculated using logarithms of the sinus volumes statistically, were 8.3cm³ and 9.6cm³ respectively. The correlation coefficient was 0.134 between the maxillary and frontal sinus, 0.445 between the maxillary and sphenoid sinus and 0.315 between the frontal and sphenoid sinus. It is suggested that differences in the volume distribution pattern between the maxillary sinus and frontal or sphenoid sinus might be caused by differences in the growing process of each sinus.