Two X-ray beams with different energy levels are aimed at the patient's bones.

It uses two different X-ray beams to estimate bone density in your spine and hip.

Some of the X-ray beam will pass through the object, while some is absorbed.

It is made of X-ray beams generated in large machines called synchrotrons.

The crystal is mounted for measurements so that it may be held in the X-ray beam and rotated.

Strong, dense bones allow less of the X-ray beam to pass through them.

Rotating the wheel can position any cell into the X-ray beam.

In this mode, either attenuation or phase shift of the X-ray beam by the sample can be measured.

Two X-ray beams are projected onto the bones.

This will slowly darken the tube and was thought to degrade the quality of the X-ray beam, but research has suggested there is no effect.