Lec 1 History Flashcards
– German glass blower.
– Built the first vacuum tube.
Johann Heinrich Wilhelm Geissler
What is the first vacuum tube called as?
Geissler tube
– German physicist.
– Used the vacuum tube to study
fluorescence.
Johann Wilhelm Hittorf
In 1870, he observed that the discharges emitted from the negative electrode of the tube traveled in straight lines, produced heat and resulted in greenish fluorescence (Cathode Rays).
Johann Wilhelm Hittorf
English Chemist; redesigned the vacuum tube: “Crookes Tube.”
William Crookes
Discovered that the cathode rays were
streams of charged particles
William Crookes
Discovered that cathode rays could penetrate a thin window of aluminum foil built into the walls of the glass tubes and cause fluorescent screens to glow.
Philip Eduard Anton von Lenard
Made the first dental radiograph in 1896.
Otto Walkhoff
Made the first dental radiograph in the US using a skull.
W.J. Morton
Exposed the first dental radiograph in the US using a live patient.
Carl Edmund Kells (C.E. Kells)
Developed the first dental x-ray unit.
William Herbert Rollins (WH Rollins)
Published the first paper on the dangers associated with radiation.
William Herbert Rollins (WH Rollins)
First to use film in intraoral radiography
Frank Van Woert
Established the first college course in radiography for dental students.
Howard Riley Raper (HR Raper)
- Discovered the x-ray on November 8, 1895
- “Father of x-rays”
- Used the Crookes vacuum tube
- While working in a darkened laboratory with a vacuum tube, he noticed a faint green glow coming from a nearby table.
- He concluded that unknown rays caused the fluorescence- x-rays
Wilhelm Conrad Roentgen
Old term for taking radiographs → “shadow writing”
Skiograms / Skiagraphs
Electrical engineer who developed the first high powered cathode x-ray tube in 1913.
William D. Coolidge
His x-ray tube became the prototype for all modern x-ray tubes.
William D. Coolidge
Manufactured a miniature version of the x-ray tube placed inside the head of an x-ray machine and immersed in oil.
Victor X-ray Corporation of Chicago
Introduced an x-ray machine with improved features in 1933. (First variable-kiloVoltage x-ray machine).
General Electric
Dental x-ray packets consisted of glass photographic plates or film cut into small pieces and hand-wrapped in black paper and rubber.
Otto Walkhoff
Manufactured the first prewrapped intraoral films in 1913.
Eastman Kodak Company
Introduced Digital Radiography System (DRS) to the dental market in France in 1987.
Dr. Francis Muoyen
Introduced the bisecting technique in 1904.
Weston Price
