Fig. 2 | Scientific Reports

Fig. 2

From: Learning from multiple readings for axial spondyloarthritis classification of the sacroiliac joints

Fig. 2The alternative text for this image may have been generated using AI.

The unit vector field (UVF): (a) a slice of an SIJ MRI with annotated landmarks in red delineating the left SIJ (with respect to the patient orientation), (b) the resulting target UVF, overlaid on top of a gradient map of the field’s direction in degrees, (c) y direction of the UVF, and (d) x direction of the UVF. (c, d) Values range from \(-1\) (blue) to +1 (yellow).

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