Radiology Flashcards
What has the shortest wavelenth and the highest energy?
X-Ray
What happens when the milliamperage is doubled?
The intensity of an X-ray beam is doubled
Kilovoltage (kVP) primarily controls what?
Contrast and is the penetrating characteristic of an Xray
What is X-ray penetration determined by?
kVP
What primarily influences the resolution?
Focal spot size
What is the most radio-resistant and sensitive tissue?
Resistant - nerve & muscle cells
Sensitive - hematopoetic
What are intensifying screens used for?
To decrease the exposure time, reduce radiation exposure
What does complication of radiation treatment in children include?
- Stunted roots
- Micrognathia
- Condylar hyperplasia
- Malocclusion
What is a coin test used for?
To detect light leakage
Doubling the distance from the radiation source does what to the radiation?
Diminishes by a factor of 4 (inverse square law)
Why is radiograph rinsed with water?
To accomplish getting rid of chemicals
What is the filter in a dental xray machine made of?
Aluminum
What is the effective dose?
Comparison of the radiation risk in humans from different radiograph exams and doses/sources
What is the greatest source of background radiation on earth?
Radon
What is the major biologic damage from ionizing radiation primarily due to?
Radiolysis of the water molecules
