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Table 1 CT imaging parameters

From: LOCAT (low-dose computed tomography for appendicitis trial) comparing clinical outcomes following low- vs standard-dose computed tomography as the first-line imaging test in adolescents and young adults with suspected acute appendicitis: study protocol for a randomized controlled trial

 

Imaging protocol

Intravenous contrast enhancement

 

Intravenous access

Antecubital, not lower extremity

Contrast material

Iodine, 400 to 800 mg/kg

Scan timing

Portal venous phase

Scan

 

Range

From 4 cm above the liver dome to 1 cm below the ischial tuberosity

Collimation

Use all detector rows available

Automatic exposure control

Use all techniques available

Reconstruction

 

Thick transverse images

Section thickness, 3 to 5 mm; overlap, 20% or more

Thin transverse images

Section thickness ≤2 mm; reconstruction interval ≤1 mm

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Trials

ISSN: 1745-6215