Specific Anatomic Region

Kidney

Application

Hematuria

Author

Yuh BI and Cohan RH

Reference Source

Semin Ultrasound CT MR 1997; 18(2):82-90

Scanner Used

GE Advantage

Injection Rate

See comment (below) for precontrast study1-3ml/sec, although 2.5cc is common

Contrast Volume and Type

100-150ml of 60% nonionic contrast

Area Scanned

Entire kidneys

Scan Delay (2 delays if dual spiral)

40sec for cortical phase100sec for nephrographic phase

Length of Spiral (time)

30-40sec

Slice Thickness

5mm

Table Speed/Pitch

5mm/sec

Reconstruction Interval

5mm (1.5-3mm for masses less than 10mm)

3D Technique Used

None

Comment: The study first requires 5mm collimation and a spiral scan with 1:1 pitch without contrast. A contrast injection is then given. Occasionally excretory-phase images at 3-10min are also obtained. The authors reserve cortical-phase images for cases where information regarding renal vessels is needed. We will in cases of hematuria also do noncontrast scans at 5mm through the kidneys only.