A scan of a baby's head is equivalent to between 200 and 600 chest X-rays.
对婴儿的头部进行一次扫描相当于进行了200至600次胸透。
Objective To study the clinical value of chest Xray and spiral ct scan in diagnosis of mediastinal emphysema.
目的：探讨x线胸片和螺旋CT对纵隔气肿的诊断价值。
Objective To study the clinical value of chest Xray and spiral ct scan in diagnosis of mediastinal emphysema.
目的：探讨x线胸片和螺旋CT对纵隔气肿的诊断价值。
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