8 - RADIATION IMAGING Flashcards
An energy that moves from one place to another in a form that can be described as waves or particles
Radiation
We benefit from medical procedures, such as many cancer treatments, and diagnostic imaging methods
Radiation (Health)
It allows us to produce electricity via solar energy and nuclear energy
Radiation (Energy)
Can be used to treat wastewater or to create new plant varieties that are resistant to climate change
Radiation (Environment and Climate Change)
With nuclear techniques based on radiation, scientists can examine objects from the past or produce materials with superior characteristics in, for instance, the car industry
Radiation (Industry and Science)
- Lower energy radiation
- Its energy can make those molecules vibrate and to produce heat
- Can detach electrons from atoms or molecules, which causes changes at the atomic level when interacting with matter including living organisms
Non-Ionizing Radiation
- Doesn’t rely on x-rays to see projected shadows of patients, unlike radiographs, CT, and fluoroscopy
- Sees tissues based upon subatomic characteristics (magnetism)
- Proton nucleus of hydrogen has small magnetic field that can be used to detect tissues containing hydrogen
Magnetic Resonance Imaging
- Developed after WW2
- Based upon SONAR
- SOund Navigation And Ranging
- Sound wave sent out
- If sound hits an object, it gets reflected back
- Measures time for the reflected echo to return
- Works best in water because it transmits sound well
Ultrasound Imaging
sound waves with frequencies which are higher than those audible to humans (>20,000 Hz)
Ultrasound
- Ultrasonic images also known as sonograms are made by sending pulses of ultrasound into tissue using a probe
- The sound echoes off the tissue; with different tissues reflecting varying degrees of sound
- These echoes are recorded and displayed as an image to the operator
Diagnostic Ultrasound
