The lesioninvolves the lateral wall of the sphenoid sinus extending into the rightorbital apex, as demonstrated by loss of normal fat attenuation in thislocation.
此病变累及蝶窦外侧壁，侵入右侧眶尖，表现为此处正常脂肪消失。
2
Mean CT attenuation values between normal pancreas and tumor and the number of metastasis of liver during the different phases were compared.
比较各期扫描正常胰腺组织与肿瘤的密度差异和肝转移瘤的发现率。
3
Periodical attenuation of particles, which interferes seriously with the normal alumina production of Bayer method, exists in the alumina production process of Bayer method.