臨床上診斷膀胱疾病的方法，主要為尿路動力學檢查，透過此項檢查我們可以得知病人的尿流速、壓力變化與膀胱尿容量等資訊；但由於該檢查方式為侵入式、並且檢查耗費時間，且容易產生患者精神上的壓力等缺點。若使用超音波技術來測量，其優點具有非侵入性、快速、可重複使用與費用較低。
本研究主要目的為建立一套利用超音波技術套搭配掃描機構來量測膀胱容積和膀胱形狀的系統。在系統驗證方面，首先我們量測水球容積，模擬膀胱假體的情況；根據計算結果發現，其平均誤差為10.11ml，再來利用線性迴歸來分析來觀察具有高度相關性(R2=0.998)。在測量離體豬膀胱的容積方面，誤差變化為12.06±4.36ml，也具有高度相關性(R2=0.995)。透過輪廓辨識待測物的形狀，再套用適當的公式計算容積，結果與文獻中所用的方法比較，具相當高的準確率(p<0.05)，平均誤差為8.5%。由統計結果顯示，非侵入式的超音波量測系統，具有臨床診斷的潛力，未來可提供醫師作為膀胱檢查的一項利器。

The gold standard for diagnosing of bladder disease is urodynamic study. We could measure the urine flow rate, pressure and bladder volume with this test. But patient will suffer from invasive procedure, time consuming and psychological stress. Ultrasound measurements are noninvasive, rapid, reproducible and inexpensive. The aim of this study is to apply ultrasound technique to develop a scanning apparatus for measuring bladder volume and bladder shape. In the beginning, we measured the balloon volume to verify the accuracy of our system. The result showed that the mean error was 10.11ml and with high correlation coefficient (R2=0.998) by linear regression. The error variance of measuring bladder volume was 12.05±4.36ml and correlation coefficient was 0.995. Utilize the contour to recognize the shape of phantom and then apply the appropriate formula to calculate the volume. The result comparison with the literatures had high rate of accuracy (p<0.05). The results of this study indicated that the ultrasound technique is potential for measuring bladder volume noninvasively.

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