Flashcards
Diagnostic Imaging
Cards in this deck (7)
- 1What are the various types of imaging?Radiography, CT scan, scintigraphy, MRI, ultrasound
- 2What are the differences between hyperechoic, hypoechoic, and anechoic?Hyperechoic: more echogenic, brighter than normal; higher in density
Hypoechoic: less echogenic, darker than normal; lower density
Anechoic: not echogenic, appears black - 3What are the three requirements for an x-ray?Source of electrons, method of accelerating electrons, and a target with which they can collide
- 4What is a contrast media and the different types?Contrast media are inert compounds that are visible radiographically.
Positive: appear white on rads
Negative: gases used to distinguish lumen
Double: positive and negative - 5What is kVp and how does changing it affect the x-ray?kVp (kilovoltage peak): high voltage across x-ray tube
Changes affect the film contrast:
High contrast (65 kVp) under penetrates tissues;
Low contrast (80 kVp) over penetrates tissues - 6What is mA and how does changing it affect the x-ray?ii. mAs (current x time): total number of electrons crossing the x-ray tube;
Changes affect the film density;
High mA: can have low exposure time
Low mA: must have a higher exposure time - 7What is the primary beam?Primary Beam: x-rays from target follow a defined path
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- Principles of Science Flashcards on Diagnostic Imaging, created by sportycanine on 26/01/2014.
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