Table 1 Definitions of CT findings
CT findings | Definitions |
|---|---|
Mucosal hyperenhancement | Mucosal enhancement of appendix was compared to that of normal small bowel loops |
Mucosal enhancement defect | Focal absence of mucosal enhancement of appendix |
Fluid collection | Extraluminal fluid collection with/without contrast-enhanced wall |
Periappendiceal fluid | Extraluminal fluid around the appendix without encapsulation |
Periappendiceal fat stranding | Increased attenuation of fat surrounding appendix. Just perceptible (thickness, 1–2 mm), mild; others, moderate–severe |
Phlegmon | A mass-like soft tissue density within the right lower abdominal quadrant surrounding inflamed appendix |
Ascites | Free fluid with is considered larger than a physiologic amount |
Small bowel dilatation | Small bowel caliber of larger than 2.5 cm |
Appendicolith | A calcific focus inside appendiceal lumen measuring ≥ 2 mm in diameter, or outside the lumen within fluid or fluid collection |
Tip appendiceal diameter | Diameter of appendix measured at within 1 cm of the tip |