方法：选择三组不同曝光条件照射、制定标准测试点通过仪器对影像密度测试，并与普通屏—片进行对照、综合评价。
Method: Three different exposure conditions were used and the density of CT radiographs obtained was measured and compared with traditional screen film image.
方法按pcos诊断标准确立先证者核心家系73个，在先证者家乡选择正常人及其家系73个作为对照组。
Methods 73 PCOS probands with family history of PCOS were diagnosed according to the PCOS diagnostic criteria.
方法：选择符合标准的颈椎病患者完全随机分为治疗组和对照组各6 3例。治疗组给予活血舒筋方口服，外擦；
Methods:CVD patients according to selected standards were randomly diveded into treatment group and controlled group, each group was 63 cases, treatment group was given HXSJP, po and outer applying.
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