全景片上出现的不寻常的伪影。
Unusual ghost image in a panoramic radiograph.
机构信息
Department of Oral Medicine & Radiology, Subharti Dental College, NH-58, Subhartipuram, Meerut, India.
出版信息
Dentomaxillofac Radiol. 2011 Sep;40(6):397-9. doi: 10.1259/dmfr/63151190.
A panoramic radiograph was taken for a 9-year-old female patient with her earrings on; thus, artefactual shadows were cast on the radiograph. In addition to the two real images of the earrings, three additional images were seen corresponding to ghost images of the earrings. They were unusual not only in appearance but also because there were three in number. This paper discusses the cause of such images as it revisits the principles of panoramic radiology with respect to ghost images.
一张全景片是为一位戴着耳环的 9 岁女性患者拍摄的；因此，射线片上出现了伪影阴影。除了耳环的两个真实图像外，还看到了另外三个对应于耳环鬼影的图像。它们不仅在外观上不寻常，而且数量也有三个。本文讨论了产生这种图像的原因，同时重新审视了全景放射学中关于鬼影的原理。
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