X-ray digital imaging
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Is the oblique radiography of the circumferential weld of small-diameter tubes, that is, elliptical imaging, a double-wall double-image phenomenon? Is the vertical radiography of that small tubular structure a single-image or double-image radiograph? Please help!
An ellipse has two arms and two shadows; those with a size of less than one inch are difficult to control. Usually, it has vertical double walls and two shadows
Small-diameter pipes generally use double-wall, double-shadow elliptical imaging; however, due to limitations in the field conditions, if elliptical imaging is not possible, vertical transmission imaging (double-wall, single-shadow) can be used.
Vertical transmission; it might be a double-wall, double-shadow effect. I saw descriptions of this in some papers, though I still don’t understand it