Portrait of Dr. Dumouchel

{{short description|Painting by Marcel Duchamp}}

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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 (X-rays had been discovered in 1895). Duchamp painted the left hand of Dumouchel surrounded by an aura, suggestive of both the rays he worked with and his healing powers. {{Cite web|url=https://www.philamuseum.org/collections/permanent/51417.html|title=Philadelphia Museum of Art - Collections Object : Portrait of Dr. Dumouchel|last=Art|first=Philadelphia Museum of|website=www.philamuseum.org|access-date=2018-11-10}}{{Cite journal|last=Henderson|first=Linda Dalrymple|author-link= Linda Dalrymple Henderson |date=1988|title=X Rays and the Quest for Invisible Reality in the Art of Kupka, Duchamp, and the Cubists|journal=Art Journal|volume=47|issue=4|pages=323–340|doi=10.2307/776982|jstor=776982}}{{Cite book|url=https://books.google.com/books?id=TPFfQgAACAAJ&q=jean+clair+duchamp+et+la+photographie|title=Duchamp et la photographie: essai d'analyse d'un primat technique sur le développement d'une œuvre|last1=Clair|first1=Jean|last2=Duchamp|first2=Marcel|date=1977|publisher=Chêne|isbn=9782851081209|pages=19–25|language=fr}}

In a letter to the Arensbergs, Duchamp writes: "The portrait is very colourful (red and green) and has a note of humour which indicated my future direction to abandon mere retinal painting."{{Cite book|url=https://books.google.com/books?id=B7dbQJlmhoUC&pg=PA28|title=Marcel Duchamp|last=Beekman|first=Klaus|date=1989|publisher=Rodopi|isbn=978-0921251521|language=en}}

Duchamp included a facsimile of the painting in the Boîte-en-valise.{{Cite journal|last=Demos|first=T. J.|date=2002|title=Duchamp's Boîte-en-valise: Between Institutional Acculturation and Geopolitical Displacement|journal=Grey Room|issue=8|pages=7–37|jstor=1262606}}