Xray Flashcards
A high energy electromagnetic radiation
X-rays or X-radiation
What are the 2 types of X-ray?
Soft Xrays and Hard Xrays
This type of xray have longer wavelengths and lower energy. Mostly used in medical imaging.
Soft Xrays
This type of Xray have shorter wavelengths and higher energy and is mostly used in security imaging.
Hard Xrays
Wavelength of Xrays
0.01 to 10 nanometers
Frequency of Xrays
30 petahertz to 30 exahertz
Energy Range of Xrays
100eV (electronvolt) to 100 keV (kiloelectronvolt)
What is the relationship between wavelength and frequency?
Inversely Proportional
What is the relationship betwen frequency and energy?
Directly Proportional
Who discovered the Xray?
Wilhelm Conrad Roentgen
When was the Xray discovered?
November 8 1895
Schools Roentgen was a professor at?
Strasbourg, Giessen, Wurzburg, and Munich
What aided in the discovery of the Xray?
Cathode Tube
How was the X-ray discovered?
Roentgen was doing experiments with a Cathode tube. He wrapped black cardboard around the tube to keep the florescent light from escaping, when suddenly another screen outside the tube was glowing. Invisible rays had passed through the cardboard.
Natural Source of Xrays?
Radon gas (radioactive gasses naturally released from rocks, soil, and etc., radioactive elements, and cosmic rays that hit the earth from outerspace.
3 effects of Xrays to an object
Collide with electrons, Absorbed, and Scattered
If materials are dense/ have high atomic number?
Absorbed
Isn’t very dense/low atomic number?
Collide
What product Produces Xrays?
Xray Tube
3 Steps in Xray Production
Source of Electrons, Acceleration, Deceleration
Where are electrons produced?
Cathode Filament
A process which is the release of electrons with response to heat
Thermionic Emission
What is needed to accelerate the electrons
kVp (kilovoltage P)
Creates a strong negative charge in the filament that forces electrons to the positively charged Anode.
kVp (kilovoltage P)
What is the anode plate made out of?
Tungsten
What happens in Deceleration?
They release their energy as heat, and more importantly, as Xrays.
What were its uses in the past?
Used in surgeries, and during the world war was used in detecting bullets.
What was the first ever shot of an xray?
Roentgen’s wife’s hand
Significance in the present?
Diagnosing cancer, used in medicine, and Xray Imaging.
Are Xrays safe?
Sometimes yes, sometimes no. Because it would depend on the exposure/energy emitted.
Why recommend an xray in medicine?
Can be used to detect blood vessels, bone cancer, and tumors.
Xrays that are not in medicine
Security (Baggage Scanner, Portable Scanners)
Astrophysics (Xray Telescope and Xray CCD Camera and Scanner)
