Table 4 Detection rate of vascular pathologies using different phases, duplex ultrasound in comparison to the dCTA findings.

From: Imaging of Patients with Complex Hemodialysis Arterio-Venous Fistulas using Time-Resolved Dynamic CT Angiography: Comparison with Duplex Ultrasound

 

dCTA Interpretation

Single phase read

Dual-phase read

Duplex ultrasound

Stenosis >50%

20

20

20

19

Complete thrombosis

5

3

5

6

Partial thrombosis

11

4

10

6

High-flow shunt

12

0

0

6

Venous aneurysm

5

5

5

5

No abnormalities

1

1

1

0

  1. Note – dCTA = time-resolved dynamic CT angiographie; single phase = fixed delay after contras media injection of 18 sec; dual-phase = best arterial phase and best venous phase.
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