LMRT CORE / RADIATION & SAFETY

High potential difference - Answer- Required to move the electron stream rapidly across the X-ray tube/ VOLTAGE Unit of potential difference - Answer- Volts Patient dose: - Answer- calculated as ESE (entrance skin exposure) Transformer that has more windings on primary side: - Answer- step-down Factors that affect xray QUALITY: - Answer- kvp & filtration How does scatter rad fog reduce visability of detail in image? - Answer- it decreases contrast Contrast is directly influenced by: - Answer- fog & collimation What minimizes shape distortion? - Answer- - position plane of subject parallel to IR - position CR perp to IR and subject Prime factors for exposure: - Answer- milliamperage Exposure time Kvp SID Precise area of target where xray beam strikes: - Answer- actual focal spot Inverse square law - Answer- intensity of xray beam is inversely proportional to the square of the distance Essential elements for xray production: - Answer- a target A vacuum An electron source A high potential difference Kvp increases then Compton scatter: - Answer- increases What reduces amt of scatter radiation fog on xray? - Answer- decrease kvp Lead equivalent for protective aprons - Answer- 0 5 mm Scatter radiation fog will: - Answer- increase density Decrease contrast Reduce visibility of detail Velocity -