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Low-density supradiaphragmatic band artifact on advanced multiple-beam equalization radiography of the chest
R T Heelan1, L N Rothenberg, J F Caravelli
1Department of Radiology, Memorial Sloan-Kettering Cancer Center, New York, New York 10021.
Rationale And Objectives:
A low-density dark band artifact was found above the diaphragm on advanced multiple-beam equalization radiography (AMBER) of the chest and was evaluated.
Methods:
Fifty consecutive chest radiographs were evaluated for the presence of the artifact. AMBER radiographs of a phantom were scanned with a microdensitometer.
Results And Conclusion:
The presence of the artifact is confirmed on the patient chest radiographs (present in 84% on posteroanterior view; 94% on lateral view) and on the phantom images. The artifact was probably caused by a delayed system response to scanning across a sharp boundary.