1.狭窄测量方法
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左图为正确测量方法,右图为错误测量方法
2.钙化容易出现假阳性
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3.钙化形态对狭窄程度判断的影响
①长轴位上:"点状","细条状"钙化,多不引起有意义狭窄。"结节状","块状"钙化,多引起有意义狭窄。
②短轴位上:"点状","新月形","半月形"钙化,多不引起有意义狭窄。"满月形","环形"钙化,多引起有意义狭窄。
③钙化斑块周围合并非钙化斑块时,多提示该处存在有意义狭窄。
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