Table 3. High-Resolution CT Techniques.

Noncontrast examination
Motion-free volumetric acquisition
	Sub-millimetric collimation
	Shortest rotation time
	Highest pitch
	Tube potential and tube current appropriate to patient size (typically 120 kVp and < 240 mAs)
	Use of techniques available to avoid unnecessary radiation exposure (e.g., tube current modulation)
Reconstruction of thin-section CT images, < 1.5–2 mm
	Contiguous or overlapping
	High-spatial-frequency algorithm
	Iterative reconstruction algorithm
Number of acquisitions
	Supine, end-inspiratory, volumetric
	Supine, end-expiratory, volumetric or sequential
	Prone, inspiratory, volumetric or sequential, can be limited to the lower lobes, systematic or optional
Radiation dose
	1–3 mSv
	Avoid ultralow-dose CT (< 1 mSv)