This is one of the geometric shapes series.
The colours in this image have a remarkably Christmassy feeling. The base images were taken from the candle-lit sparkles on polished cut glass bringing out the square pattern on the surface. The chest X-ray is from a man with emphysema with the classic box-shaped chest.
Despite the happiness in this image, there are two slightly ominous aspects; the highlit cross in the middle reminds me of a distorted plane flying over the ground, and the bones clearly visible on the right are distinctly un-Christmassy.