506391
Beschreibung
Karteikarten von sportycanine, aktualisiert more than 1 year ago
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Erstellt von sportycanine
vor fast 11 Jahre
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| Frage | Antworten |
| What are the various types of imaging? | Radiography, CT scan, scintigraphy, MRI, ultrasound |
| What 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 |
| What are the three requirements for an x-ray? | Source of electrons, method of accelerating electrons, and a target with which they can collide |
| What 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 |
| What 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 |
| What 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 |
| What is the primary beam? | Primary Beam: x-rays from target follow a defined path |
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