Unit 3 Flashcards
Who discovered xrays?
Wilhelm Conrad Roentgen
On what date were xrays discovered?
November 8, 1895
Who was the first radiographic patient?
Anna Bertha Roentgen (wife)
When were xray demonstrations set up for the public?
Jan. 1896
Who developed the handheld fluoroscope?
Thomas Edison
Who made the first diagnostic x-ray?
Dr. Edwin Frost
What was Dr. Edwin Frost’s radiograph of?
the wrist (colles fracture)
When did angiography begin?
Jan. 1896
It wasn’t until the death of _______ _______ (Edison’s assistant) that observers agreed that x-rays could kill
Clarence Dally
Who was the discoverer of radioactivity?
Henri Bequerel
Who founded ways to measure the intensity of radiation and found other elements that emitted radiation?
Pierre & Marie Curie
15% rule (by lengthening the scale of contrast)
If you increase the kVp by 15% you must decrease the mAs by half.
15% rule (by shortening the scale of contrast)
if you decrease the kVp by 15% you must double your mAs (you wouldn’t want to do this b/c it increases the amount of patient radiation)
Distance calculations
new mAs new d2 (distance squared)
————– = ————–
old mAs old d2
