Which imaging option is the non-contrast choice for suspected appendicitis when contrast is contraindicated?

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Multiple Choice

Which imaging option is the non-contrast choice for suspected appendicitis when contrast is contraindicated?

When contrast cannot be used, the goal is to still visualize the appendix and surrounding inflammation with a modality that provides clear cross-sectional anatomy. A non-contrast CT of the abdomen and pelvis can reveal an enlarged appendix, wall thickening, periappendiceal fat stranding, and sometimes an appendicolith. These signs are strong indicators of appendicitis and can be detected without contrast, offering higher diagnostic accuracy in adults than ultrasound in many cases. Ultrasound is useful and radiation-free but is more operator-dependent and can be limited by body habitus and gas. Plain X-ray rarely identifies appendicitis. So, the non-contrast CT abdomen/pelvis is the best non-contrast imaging option when contrast is contraindicated.

When contrast cannot be used, the goal is to still visualize the appendix and surrounding inflammation with a modality that provides clear cross-sectional anatomy. A non-contrast CT of the abdomen and pelvis can reveal an enlarged appendix, wall thickening, periappendiceal fat stranding, and sometimes an appendicolith. These signs are strong indicators of appendicitis and can be detected without contrast, offering higher diagnostic accuracy in adults than ultrasound in many cases. Ultrasound is useful and radiation-free but is more operator-dependent and can be limited by body habitus and gas. Plain X-ray rarely identifies appendicitis. So, the non-contrast CT abdomen/pelvis is the best non-contrast imaging option when contrast is contraindicated.

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