What is a dual energy subtraction?
Dual energy subtraction (DES) radiography is a powerful but underutilized technique which aims to improve the diagnostic value of an X-ray by separating soft tissue from bones, producing two different images.
What is a dual energy chest Xray?
Dual-energy subtraction (DES) radiography is a recently developed technique that incorporates both standard, high-energy and low energy (i.e., bone) images as part of a routine chest radiographic examination. DES offers two principal advantages over conventional digital chest radiography.
What is the normal range of kVp used in chest radiography?
Conventional projection radiographs of the lung are performed with 120 to 130 kVp, whereas radiographs of bones are typically obtained with 70 to 80 kVp21,22.
What is a chest 2 View?
Typically, two views of the chest are taken, one from the back and the other from the side of the body as the patient stands against the image recording plate.
How does dual energy CT work?
Dual-energy CT may improve vascular imaging by increasing the attenuation of vessels at lower energies, providing improved characterization of heavily calcified vessels with the use of subtraction techniques, and by decreasing the radiation dose by eliminating the need for true unenhanced images.
What is a dual energy CT scan?
A dual energy CT scanner is fairly new technology that uses both the normal X-ray and also a second less powerful X-ray to make the images. This gives dual energy CT additional advantages over standard CT for a wide range of tests and procedures (see benefits of dual energy CT below).
Why is high kVp used in chest radiography?
A high kilovoltage technique enhances the visibility of the lungs by reducing the contrast of the bony thorax and also has the advantage of better penetration of the mediastinum (4,6).
What is kV in radiography?
Kilovoltage peak (kVp) is the peak potential applied to the x-ray tube, which accelerates electrons from the cathode to the anode in radiography or computed tomography.