Vascular

Carotid arteries: Carotid artery stenosis

Specific Anatomic Region

Carotid Arteries

Application

Carotid artery stenosis

Author

Dillon et al.

Reference Source

Radiology 1993; 189:211-219

Scanner Used

Tomoscan SR-7000

Injection Rate

1.8ml/sec

Contrast Volume and Type

120ml of Ioxitalamate (Telebrix)-350

Area Scanned

Base of skull till C5-6

Scan Delay

3.5sec

Length of Spiral (time)

40sec

Slice Thickness

3mm

Table Speed/Pitch

3mm/sec with a pitch of 1

Reconstruction Interval

1mm

3D Technique Used

Shaded-surface rendering technique

Comment:

• Patients had their heads tilted back and the gantry was angled so that it was perpendicular to the presumed course of the carotid arteries. The published results with shaded-surface rendering have been poor and this 3D technique should be avoided. MIP or volume rendering would be preferred.
• We find that there is no need to angle as the reconstruction can choose the optimal plane.