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Since December 2016, YouTube started rolling out a progress bar at thumbnails' bottom edge, indicating the watch progress of previously watched videos, starting with the iOS app. [187] Live streaming from the mobile app was rolled out in early 2017, initially only available to channels with at least 10,000 subscribers. [188]
Radiology (/ ˌ r eɪ d ɪ ˈ ɒ l ə dʒ i / rey-dee-ol-uh-jee) is the medical specialty that uses medical imaging to diagnose diseases and guide treatment within the bodies of humans and other animals. It began with radiography (which is why its name has a root referring to radiation), but today it includes all imaging
Taking an X-ray image with early Crookes tube apparatus, late 1800s.. For the first three decades of medical imaging's existence (1897 to the 1930s), there was no standardized differentiation between the roles that we now differentiate as radiologic technologist (a technician in an allied health profession who obtains the images) versus radiologist (a physician who interprets them).
MRI Scanner Mark One. The first MRI scanner to be built and used, in Aberdeen Royal Infirmary in Scotland. The history of magnetic resonance imaging (MRI) includes the work of many researchers who contributed to the discovery of nuclear magnetic resonance (NMR) and described the underlying physics of magnetic resonance imaging, starting early in the twentieth century.
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A CT scan of a patient's chest is displayed through teleradiology.. Teleradiology is the transmission of radiological patient images from procedures such as x-rays photographs, Computed tomography (CT), and MRI imaging, from one location to another for the purposes of sharing studies with other radiologists and physicians.
It was first introduced in 2012, as a joint initiative of the European Society of Radiology (ESR), the Radiological Society of North America (RSNA), and the American College of Radiology (ACR). [1] The International Day of Radiology is acknowledged and celebrated by nearly 200 national, sub-speciality, and related societies around the world.
Heinrich Rudolf Hertz (1856–1894) proved the existence of electromagnetic radiation. In an 1864 presentation, published in 1865, James Clerk Maxwell proposed theories of electromagnetism and mathematical proofs demonstrating that light, radio and x-rays were all types of electromagnetic waves propagating through free space.