CHP 1

Wilhelm Conrad Roentgen

Nov 8, 1895 : Discovery of X-rays

How Wilhelm Conrad Roentgen Discovered X-Rays

While experimenting with vacuum tubes and fluorescent screens

Discovery of the X-ray (Ms.Bertha)

Placed wife hand on photographic plate for 15 min, to permanent capture hand, first radiograph of human body.

Otto Walkhoff -1895

Made the first dental radiograph on himself

W.J. Morton -1895

Made the first radiograph in US using a skull

C.Edmund Kells- 1896

Exposed the first dental radiograph in the U.S. using live person

First practical use of x-ray in dentistry

William H. Rollins

Developed the first dental x-ray unit

Frank VanWoert

First to use film in intraoral radiography , Pioneered first use of Kodak film

Howard Riley Raper

Established the first college course in radiography for dental students

William Coolidge- 1913

Developed first hot cathode x-ray tube, prototype for modern x-ray tubes

Victor X-Ray Corporation- 1923

Added oil immersion of the tube, precursor for all dental x-ray machines

1957

Variable kVp machine

1966

Recessed long-beam tubehead

1896-1913

Hand-wrapped glass photographic plates or film

Eastman Kodak- 1913

Manufactured pre wrapped intraoral film

1920

First machine made Periapical film packet

C.Edmund Kells -1896

Introduced paralleling technique

Weston Price

Bisecting technique

Howard Riley Raper-1925

Refined original bisecting technique and introduced bitewing technique

F.Gordon Fitzgerald -1947

Introduction of the long-cone paralleling technique

Hisatugu Numata-1933

First to expose a panoramic radiograph

Yrjo Paatero

Experimented with a slit beam of radiography, intensifying screens, and rotational techniques