...丁网 93 例已接受首次系统治疗后（first-line therapy）的NHL 病人行FDG PET 和传统诊断方法（conventional diagnostic methods，CDM）对比研究。PET 显像阳性的26 例患者中，全部复发，中位无病生存时间为73 天。
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与其他类型的诊断方法对比的最新临床试验已经完成，研究结果显示，癌症筛检的风险和成本比任何传统诊断手段都要高。
New clinical trials were completed, as were analyses of other sorts of medical data. Researchers studied the risks and costs of screening more rigorously than ever before.
冲击故障的振动响应信号是时变的，用传统的诊断方法一般难以进行早期发现和诊断。
Vibration response signal of impulse fault is generally time variant. It is difficult to early detect and diagnose by means of traditional methods.
内燃机曲轴轴承所受到的冲击信号是非平稳、时变信号，用传统的诊断方法难以进行故障的早期发现和诊断。
Vibration signals borne by different main bearing clearances are not stationary and time variant. It is difficult to early detect and diagnose by means of traditional methods.
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