進行診斷劑量之相關評估工作可以得到許多有用的資訊，包括從相同的檢查當中使用不同的照射條件、照射方向及X光機所得到的有效劑量及照射參數使用情形等資訊。同時，將評估結果與其他文獻作一比較，其比較結果將有助於實行影像品質與劑量之最佳化，亦可以幫助我們去發現是否在某種X光攝影技術中的劑量特別高。近年來，雖然已有許多關於病人劑量評估的文獻被發表出來，但有關於大量個案之劑量分佈情形的文獻，則是相對地少，而為了能夠確實地發現存在於一般X光診斷檢查當中的問題，進行大量個案之評估乃是必須的。
本研究針對某區域醫院於2009年12月份所執行之一般X光診斷檢查作劑量監測工作，該院所使用之X光機有GE Revolution XR/d型及Toshiba CXDI-1型，而檢查的執行皆操作於自動曝露控制模式。我們從個別病人的DICOM影像檔中取得每次照射的條件及病人相關資訊，包含管電壓(kVp)、射源至影像接受器之距離(SID)、曝露因子(mAs)、檢查類別、投照方向及病人性別與年齡，然後以PCXMC 2.0蒙地卡羅模擬軟體，依照實際照射參數進行劑量計算。
研究當中，除了將評估結果與文獻作一比較，也針對了不同機型X光機作一比較以及探討照射參數與劑量之關係。並由照射參數探討的結果中，以函數擬合方法導出有效劑量之經驗公式，提供一般X光檢查一個有用且快速的劑量評估工具。

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