 Where it is readily available, computed tomography (CT) has become frequently used, especially in people whose diagnosis is not obvious on history and physical examination.Concerns about radiation tend to limit use of CT in pregnant women and children, especially with the increasingly widespread usage of MRI.The accurate diagnosis of appendicitis is multi-tiered, with the size of the appendix having the strongest positive predictive value, while indirect features can either increase or decrease sensitivity and specificity.