Specific Anatomic Region	Trachea
Application	Virtual bronchoscopy
Author	Lee KS et al.
Reference Source	RadioGraphics 1977; 17:555-567
Scanner Used	GE HiSpeed Advantage
Injection Rate	N/A
Contrast Volume and Type	None
Area Scanned	Depends on clinical question (i.e. bronchi vs airway)
Scan Delay	None
Length of Spiral (time)	Up to 30sec
Slice Thickness	3mm
Table Speed/Pitch	3mm/sec
Reconstruction Interval	1.5mm
3D Technique Used	Shaded surface
Comment: This technique will have a limited scan distance of 9cm. We believe you can increase the pitch to 2 which gives you 18cm coverage, which is enough for the trachea and major airways. Newer single detector scanners can cover a larger volume and the enrite airway scanned.