[Computer-assisted anatomical evaluation of the nasal sinuses in 2-3 years old children].

To analyze the anatomical and developmental characteristics of nasal sinuses in 2-3 years old children.Coronal CT scans of 62 cases (2-3 years old children) were studied with the imaging station. The gasification conditions of the sinuses were identified and measured.The mean of the transverse and vertical diameters for the left side of the maxillary sinuse was (17.51±2.92)mm and (16.63±3.46)mm. Those for the right side were (17.28±2.51)mm and (17.24±3.72)mm. The mean for the left side of the anterior ethmoid sinus were (5.06±1.18)mm and (13.61±2.49)mm. Those for its right side were (5.00±1.45)mm and (13.64±2.30)mm. The mean for the left side of the posterior ethmoid sinus were (7.94±1.72)mm and (12.80±1.78)mm. Those for the right side were (7.88±1.85)mm and (12.64±.96)mm.96.77%(120 sides) of the sphenoid sinuses were developed. The mean for the left side of the sphenoid sinus were (7.38±3.11)mm and (8.67±3.14)mm. Those for the right side were (7.48±2.70)mm and (8.63±2.42)mm. 30.65% (38 sides) of the frontal sinuses were developed.The all nasal sinuses in 2-3 years old children have been already developed. The pneumatization of the frontal sinus was defined in some babies. It can help radiologist make correct diagnosis of paranasal sinuses in children.