To avoid the phenomena of photon overlap, many measures such as neutral optical attenuator, gate witch and reducing the gain of PMT, are taken to enhance accuracy of ozone measurements.
为避免产生光子并合现象的产生，可以利用在接收光路上加装中性衰减片、提高光电倍增管开始工作的高度和降低光电倍增管增益等措施来分段测量，提高臭氧测量的精度。
Objectives To improve the accuracy of diagnosis of osteoporosis and promote the clinical use of dual-energy x-ray photon absorptiometry for assessment of osteoporosis.
目的促进DXA骨密度测量技术的临床应用和提高骨密度诊断的精度。
Objectives To improve the accuracy of diagnosis of osteoporosis and promote the clinical use of dual-energy x-ray photon absorptiometry for assessment of osteoporosis.
目的促进DXA骨密度测量技术的临床应用和提高骨密度诊断的精度。
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