Looks like a high-key shot of a high contrast subject - i.e., dark paint/fluid on the nude model. Then a severe levels or curves adjustment to push darks darker and lights lighter (increase contrast) and a hue-sat layer, set to colorize, to get the purple hue. The mid tones in the image can be pushed one way or the other with a brush, set to overlay mode, and using white to push light tones to white or black to push dark mid tones to black.
You could work most of the image as grayscale to get the high contrast image and then convert back to RGB to do the hue-sat operation.
maybe?
kirk