Medtalk

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X-ray Imaging Tricks Increase Resolution and Cut Dose (Part 1 of 3)

Source: BBC Health

An international research team has proposed a way to make high-resolution, 3D images of breast tissue while reducing the delivered X-ray dose. Breast tissue is particularly susceptible to X-ray radiation so 3D scanning is generally not employed.

Now a team reporting in Proceedings of the National Academy of Sciences suggests a different form of X-rays and a new image analysis approach. However, new compact X-ray sources are needed to bring the idea to the clinic.

Taken together, the two improvements lead to high-resolution 3D images while reducing the delivered dose to just 4% that of standard “computed tomography” scans. A phenomenally successful technique in X-ray scanning over the past half-century, CT scans are made with a number of X-ray images taken from various angles that are analysed to yield a 3D view.

The approach is reserved for the imaging of parts of the body for which these multiple X-ray exposures is deemed safe, generally excluding “radiosensitive” breast tissue. Instead, what is known as dual-view mammography is employed, producing two conventional X-ray images of the breast – a methodology that is known to miss 10-20% of tumours.

To be continued…

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This entry was posted on October 23, 2012 by in Breast Cancer and tagged , , .
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