X-ray method improves soft tissue detail

Mar 28, 2006

Swiss scientists say they've developed a technique for improving the detail obtained in X-ray images of soft tissues.

Franz Pfeiffer and colleagues at the Scherrer Institute in Villigen, Switzerland, say the technique works by extracting more information from the X-rays that pass through the tissue. Conventional X-ray imaging relies on the fact that different tissues of the body absorb radiation to different degrees.

The study appears in the April issue of the journal Nature Physics.

That, the researchers say, makes it relatively easy to distinguish the structure of bones and other dense bodies from surrounding tissues. But for soft tissues, which absorb less radiation and therefore produce less contrast in an X-ray image, discerning fine details becomes more difficult.

The scientists said they took advantage not only of how tissues absorb the X-rays, but of how much they slow their passage -- thereby changing the phase of the radiation that emerges from the other side.

Because of the sensitivity of the phase to even small variations in the composition of the tissue, the technique can greatly improve the contrast and clarity of the structures in the X-ray image.

Copyright 2006 by United Press International

Explore further: Research team discovers new liquid crystal configurations

Related Stories

Light's Answer To Ultrasound

Apr 23, 2005

You have a tiny wound on your hand that doesn’t heal, a bad burn on your chest – or an injured retina. Your doctor cannot tell how serious the injuries are below the surface. He needs tissue samples. That means using ...

Recommended for you

Soft, energy-efficient robotic wings

18 hours ago

Dielectric elastomers are novel materials for making actuators or motors with soft and lightweight properties that can undergo large active deformations with high-energy conversion efficiencies. This has ...

Trapping and watching motile cells

22 hours ago

A new approach enables rapid characterization of living suspension cells in 4 dimensions while they are immobilized and manipulated within optical traps.

Controlling defects in engineered liquid crystals

22 hours ago

Sitting with a joystick in the comfort of their chairs, scientists can play "rodeo" on a screen magnifying what is happening under their microscope. They rely on optical tweezers to manipulate an intangible ring created out ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.