Vascular

Abdominal aorta: Evaluate AAA

Specific Anatomic Region

Abdominal Aorta

Application

Evaluate AAA

Author

Zeman RK et al.

Reference Source

AJR 1995; 164:917-922

Scanner Used

GE HiSpeed CT

Injection Rate

2.5ml/sec

Contrast Volume and Type

125ml of Iohexol 300

Area Scanned

Diaphragm to symphysis pubis

Scan Delay

40sec

Length of Spiral (time)

32sec

Slice Thickness

3mm first 20sec, 7mm rest of study

Table Speed/Pitch

3mm/sec and 7mm/sec with a pitch of 1:1

Reconstruction Interval

33-43% overlap

3D Technique Used

MIP, shaded-surface, sum of pixel (ray-sum)

Comment:

• In other articles these authors found that MPR and 3D imaging were very useful.
• With newer scanners a single spiral is done without changing the slice thickness & keeping it 3mm throughout the study.