輻射劑量是指由光子的電離輻射引起的空氣電離的程度, [1]在特定體積的空氣中輻射劑量大小取決於輻射釋放的電荷除以特定體積的空氣的質量。[1][2]包括X射線、計算機體層成像、乳房攝影術、肺通氣和灌注掃描、骨掃描、心臟灌注掃描、血管攝影、放射治療等在內的不同的放射性醫學檢查和治療手段的輻射劑量都有所不同。 [3]
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