National Radiologic Technology Week National Radiologic Technology Week National Radiologic Technology Week® (NRTW®) is an annual event established by the American Society of Radiologic Technologists to celebrate the important role medical imaging and radiation therapy professionals play in patient care and health care safety. The weeklong celebration highlights the radiologic technology profession and raises public awareness about radiologic technologists. The first National Radiologic Technology Week® was held July 22-29, 1979. The annual celebration was later changed to November to commemorate the anniversary of the x-ray’s discovery by Wilhelm Roentgen on Nov. 8, 1895. It is celebrated on the week of November 8. “Celebrate National
Roentgen (unit) the SI. The US NIST clarified in 1998 that it was providing its own interpretations of the SI system, whereby it accepted the roentgen for use in the US with the SI, while recognizing that the CIPM did not. By then, the limitation to x and γ radiation had been dropped. NIST recommends defining the roentgen in every document where this unit is used. The continued use of the roentgen is strongly discouraged by the NIST. Whilst a convenient quantity to measure with an air ion chamber, the rontgen had the disadvantage that it was not a direct measure of