On 8 November 1895, German physicist Wilhelm Conrad Röntgen (1845-1923) produced and detected electromagnetic radiation in a wavelength range today known as x-rays or Röntgen rays. His achievement earned him the first Nobel Prize in Physics in 1901. (In English, the name "Röntgen" is usually transliterated as "Roentgen").

The field of radiology (also called "Roentgenology") arose from Roentgen's discovery, and is now a critical part of medical practice. The American Roentgen Ray Society (ARRS) -- named in Roentgen's honor -- was founded in 1900, and is the first and oldest radiology society in the United States.

The ARRS is dedicated to the advancement of medicine through the science of radiology and its allied sciences. The ARRS conducts an annual scientific and educational meeting and publishes the leading clinical radiology journal, the American Journal of Roentgenology (AJR).

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Here's the image that Dr. Charles Kahn showed at the conclusion of his 2012 address as incoming President of the American Roentgen Ray Society (ARRS).

It's a photo mosaic of Professor Wilhelm Conrad Roentgen, in whose honor the ARRS was named.

The image is a mosaic composed of medical images. All of the images come from ARRS's journal, the AJR (American Journal of Roentgenology).

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