Low-density supradiaphragmatic band artifact on advanced multiple-beam equalization radiography of the chest.
OBJECTIVE
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.


CONCLUSIONS
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.
Heelan
R T
RT
Department of Radiology, Memorial Sloan-Kettering Cancer Center, New York, New York 10021.
Rothenberg
L N
LN
Caravelli
J F
JF
Fleischman
R C
RC
Castellino
R A
RA
D016477:Artifacts; D003198:Computer Simulation; D003964:Diaphragm / Q000000981:diagnostic imaging; D006801:Humans; D008961:Models, Structural; D013902:Radiography, Thoracic / Q000379:methods*; D013679:Technology, Radiologic