Keep on the right track

OCT angiography (OCTA) uses the movement of blood cells as the intrinsic contrast that allows the visualisation and analysis of vascular tissues. Because of the need for multiple scan analysis and the three-dimensional nature of vascular structures, OCTA is particularly prone to artefacts. These may be of two main types:

Figure 2: Motion artefacts due to saccades during OCTA

Motion correction technology and DualTrac

The latest OCT instruments from Optovue (the Avanti OCT and the Angiovue – both distributed in the UK by Haag Streit UK) use a video live capture eye tracking system during a scan as one would expect.