Portrait of Dr. Dumouchel

Portrait of Dr. Dumouchel is a 1910 painting by Marcel Duchamp. Raymond Dumouchel was a former schoolmate and a student in Radiology, an emerging field at the time. Duchamp painted the left hand of Dumouchel surrounded by an aura, suggestive of both the rays he worked with and his healing powers.
In a letter to the Arensbergs, Duchamp writes: "The portrait is very colourful and has a note of humour which indicated my future direction to abandon mere retinal painting."
Duchamp included a facsimile of the painting in the Boîte-en-valise.