放射診斷影像簡介 | 合法醫療器材資訊網

X 光的能量與強度. • 能量(kVp) 決定影像對比. – 牽涉到X 光與物質的作用. – 光電效應與康普吞散射. • 強度(mAs) 決定影像亮度與劑量 ... Read More

mAs primarily controls density, but changes in kVp contribute to image density as well. The 15% rule states that a 15% increase in kVp is similar to doubling mAs. Read More

mAs. 70 kVp/20 mAs. 70 kVp/40 mAs. 70 kVp/80 mAs. • Densitometer ... 125 kVp. • AEC detector dose (4μGy). Entrance dose →effective dose. Pascoal ... Read More

Along with the mAs (tube current and exposure time product) and filtration, kVp (​tube voltage) is one of the primary settings that can be adjusted on x-ray ... Read More

2014年3月28日 — 受檢者劑量與mAs成正比，kVp平方成正. 比，距離平方成反比. ○ 若X光機使用70 kVp, 100 cm處輸出強度. 為0.1 mSv/mAs，某檢查條件90 kVp, 2. Read More

由 J Reid 著作 · 2010 · 被引用 75 次 — Objective: The objective of our study was to determine the effect of mAs and kVp reduction on pediatric phantoms based on patient circumference to optimize ... Read More

由 KH Thunthy 著作 · 1978 · 被引用 22 次 — Five observers read the radiographs. The first experiment showed that, when the film density is kept constant, the higher the kVp, the lower the resolution and ... Read More

This image was generated at 60 kV, and required a relatively high radiation intensity of 141 mAs. The S number generated by the system was ~140, which ... Read More