Patient Care 1 Flashcards
(40 cards)
What is the Crookes Tube?
First device that produced x-rays
Did research experiments in the 1870s and 1880s discover x-rays?
No, doing experiments on neon signs and fluorescent lights did (in 1895)
Who is considered the “father of x-rays”?
Wilhelm Conrad Roentgen
Who was Wilhelm Conrad Roentgen?
German physicist that discovered that x-rays were being emitted by the Crookes tube.
When and where did Roentgen discover x-rays?
November 8, 1895 at the University of Wurzburg
H.C. Snook
developed interrutperless transformers that provided the necessary electricity for x-ray production
William Coolidge
designed the “hot cathode” x-ray tube, the Coolidge tube was the prototype for modern x-ray tubes today
Michael Idvorsky Pupin
demonstrated the radiographic use of fluorescent screens (predecessor of intensifying screens)
Thomas Edison
developed the first fluoroscope (discovered many of the fluorescent materials used today in imaging)
Charles Dally
Thomas Edison’s assistant and the first fatality from x-ray exposure in the United States in 1904 (Edison ceased his research of x-rays after Dally’s death)
George Eastman
invented the first x-ray film base in 1914
What was the first anatomic radiograph?
Roentgen produced the first anatomic radiograph of his wife’s hand
When was the first documented medical use of x-rays in the United States?
February 1896 (an exam of a boy’s fractured wrist, performed at Dartmouth College)
What were the first “x-ray technicians”
Assistants of physicians who were trained by their physicians and became skilled in radiography
When did radiation therapy education become separate from radiography
1950s
What does a radiographer do?
-Positions the patient’s anatomy to be imaged over the image receptor (IR)
-Aligns x-ray tube (beam or central ray) to the IR
-Sets exposure factors
-Activates the exposure switch
What is latent image?
x-ray photons that exit the patient strike the IR to create latent image (invisible, initial image of anatomy, processed through manifest image)
What is manifest image?
obtained depending on the type of IR (a processed image, digital displays on a monitor)
4 basic requirements for the production of x-rays:
-A vacuum (x-ray tube)
-Electron source (filament)
-A target for the electrons (anode)
-A high potential difference (voltage) between the electron source and the target (opposite charges attract)
What is the primary source of occupational exposure?
scatter radiation (created when. portion of an x-rays photon’s energy is absorbed)
Cathode
filament (source of electrons in x-ray tubes)
Anode
the target (small metal disc that receives the electron beam from cathode and emits it as x-ray)
What is X-ray Tube Housing?
protective covering around the x-ray tube (protects and supports components, shields from off-focus radiator)
What is the X-ray Tube Support and its 2 types?
provides support and mobility for the tube
-Ceiling mount
-Floor stand