ABSTRACT
Positioning for lateral chest projection. https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315382210/8ca82e7c-bd07-4171-b4f5-ebaded57b5b3/content/fig2_16a.jpg" xmlns:xlink="https://www.w3.org/1999/xlink"/>
A vertical Bucky DDR system or a 35 cm × 43 cm CR cassette is employed.
A moving or stationary grid may be used to prevent excess secondary radiation reaching the image. An FRD of 180 cm is used to minimise magnification, but in some circumstances this is reduced to 150 cm to maintain a short exposure time.
The patient is turned to bring the side under investigation in contact with the image receptor.
The median sagittal plane is adjusted parallel to the image receptor.
The patient’s arms are folded over the head or raised above the head to rest on a horizontal bar.
The mid-axillary line is coincident with the middle of the image receptor, which is then is adjusted to include the apices and the lower lobes to the level of the first lumbar vertebra.
