Specific Anatomic Region	Colon
Application	Virtual colonoscopy
Author	Hara AK
Reference Source	AJR 1997; 168:1181-1184
Scanner Used	GE HiSpeed Advantage
Injection Rate	N/A
Contrast Volume and Type	Rectal air
Area Scanned	Entire abdomen
Scan Delay	None
Length of Spiral (time)	3 to 4 20sec breathhold spirals
Slice Thickness	5mm
Table Speed/Pitch	6.5mm/sec or a pitch of 1.3
Reconstruction Interval	3mm
3D Technique Used	Shaded surface
Comment: The authors felt that this protocol was as good as one using 1mm reconstruction intervals. We have been using a protocol of 3mm collimation, 6mm/sec table speed and reconstruction at 1mm intervals. The main problem is >400 slices which is time consuming.