Radiation Physics
Angle of deflection of a photon at which the most energy is transferred to an electron in Compton Scattering.
Caused by a bad detector in CT scanners
MRI: The preference of magnetic dipoles to the parallel state (in ppm/T)
What is 3ppm/T?
Who is Dr. Wilhelm Roentgen?
The nuclear launch code for US Minuteman ICBMs from 1961- end of the cold war. (it is 8 numbers)
What is 00000000?
These are released via internal conversion or sometimes through characteristic x-ray interactions
Auger electrons
Looks like a change in brightness or spatial distortion in a portion of an MRI image, caused by drastic changes to the local magnetic field from magnetic materials (ferro/para/dia)
What are Magnetic Susceptibility artifacts
The nuclear medicine radionuclide generated by "milking the cow"
What is Tc-99m?
What were common side effects (min. 3) of early x-ray treatments that started radiation protection research? (not in Jeopardy format, sorry)
Burns, hair loss, blindness, cancer, etc.
Notably: Thomas Edison's assistant getting severe burns and dying of cancer
The color you see when you close your eyes
What is Eigengrau
In theory, do electrons exhibit a Bragg Peak AND why do/don't we observe it in practice?
Yes and Similar mass interactions (electrons-electrons) causing sporadic paths, i.e. range straggling and energy straggling
Looks like hyper-intense repeating lines, caused by repeated reflections between two closely spaced objects in Ultrasound.
What are reverberation artifacts?
This imaging relationship is most notably represented by a Bi-linear distribution
Electron Density and HU
What are X-rays?
The way the inventor of the Segway died
Stopping power proportionality with particle velocity
What is 1/v^2
Erythema occurs at this dose
What is 6 Sv?
If you say Gy, I'll give it to you
Why can you see inside the skull of a fetus/infant, but not a kid/adult in an Ultrasound
The skull hasn't fully hardened, i.e. lower bulk modulus
c = sqrt(B/rho)
Trained 150 female volunteers as x-ray technicians in WWI to operate 20 portable X-ray machines on cars
Who was Marie Curie?
(The cars were known as the "Little Curie" / "Radiologcal Car")
The plant used to clean up soil around Chernobyl and Fukushima
What are sunflowers?
The decay process a free neutron undergoes
What is Beta- decay
This type of uncertainty in protons could cause dose in the PTV to go from 100% to ~0%. There are 2 that are related, just say one
What are stopping power uncertainty or range uncertainty?
Why Geiger-Mueller Detectors are not useful for pulsed LINAC beams
Year of the first commercially available CT scanner
What happened in 1972?
By Godfrey Hounsfield and Allan McLeod Cormack
Watermelons are the state vegetable of this southern state
What is Oklahoma?