"In radiography, the automatic exposure control device is placed in front of the image receptor. In mammography, the automatic exposure control device is placed underneath the image receptor. This is mainly due to the low energy requirement for mammography; if the AEC device was placed in front of the receptor, the device would produce an image on the receptor, confounding the mammogram."
"In chest radiography, typically three ionisation chambers are used; a left, right and central chamber. The patient's position should align with the chambers such that the left and right are behind their lungs, whilst the central is behind the spinal column."
"In chest radiography, typically three ionisation chambers are used; a left, right and central chamber. The patient's position should align with the chambers such that the left and right are behind their lungs, whilst the central is behind the spinal column."