Rate of and factors affecting sonographic visualization of the appendix in asymptomatic children.

Reported sonographic visualization rates of the appendix in children are variable. Visualization rates may be affected by patient's age and various patients' physical characteristics. The purpose of this study is to determine the frequency of sonographic visualization of the appendix by pediatric sonographers, to assess factors that may affect visualization of the appendix, and to define the characteristics of the appendix and periappendiceal region in asymptomatic children.