Original post here.

Sourced to Space Ghost Zombie.

Bonus Image Provenance: I commissioned Bacchus at ErosBlog to research this image further, and he has come up with the following additional details.

This image appears to be cropped from the poster art of a 1980s horror movie variously known as “Hospital Massacre” or “X-Ray”.

The best version of the poster I could find is here:

http://www.avmaniacs.com/forums/showthread.php?t=49779&s=ab026ba2556cbce0595f73506fd92c41&p=937361&viewfull=1#post937361

Several other posters and much movie info can be found at these two sites:

http://lastroadreviews.wordpress.com/2012/03/27/hospital-massacre-1982-review-by-dave-kaye/
http://horrorpedia.com/2013/02/14/hospital-massacre/

There’s a nice LaserDisc cover art version of the image here:

http://laserdisc.holin.de/xray.jpg

Some information about the movie is here:

http://www.imdb.com/title/tt0082527/

The movie itself can be viewed on YouTube:

http://www.youtube.com/watch?v=H__d9mqmxRo

One of the other posters for the movie has a different but equally colorful erotic mad science theme, so I’m linking the best version of it that I could find:

http://www.chantrellposter.com/images/products/large/152.jpg

That’s actually from the page of the artist, Tom Chantrell, but the deep link is necessary because the page doesn’t offer the large image in full:

http://www.chantrellposter.com/XRay-Quad-Poster-Original/288

Given the general pulpy similarity with your image of interest, I wonder whether Chantrell may be the artist there too — but cannot confirm. Chantrell was a prolific movie poster artist, credited with the original Star Wars poster among many others:

http://en.wikipedia.org/wiki/Tom_Chantrell
http://www.britposters.com/chantrell.htm

Bacchus is actively taking image research commissions, and if you have adult imagery you’re curious to learn more about, I encourage you to visit Bacchus’s introductory post for his image-searching service, where you can find details about how to commission him.