Find Better Diagnosis of Cancer by Current Density Imaging  

Current density imaging (CDI) is an extended medical technology of Magnetic resonance imaging (MRI). It helps better to diagnostic procedure wherein pictures of the inner parts of the body are taken for making evaluations. This imaging technique measures electrical current density vectors in a volume of tissue/material which can be viewed by using MRI. The magnetic fields produced by the applied current are mapped onto the phase images of the MRI acquisition. Performing CDI needs an MRI system, a modified sequence (PSD) and data processing software.

This CDI technique was developed at the University of Toronto. It mainly employs two techniques for spatially mapping electrical current pathways through tissue: low frequency CDI (LF-CDI), and radio frequency CDI (RF-CDI).

The LF-CDI uses the low frequency electrical currents that are injected into the tissue. They generate magnetic fields, which are then measured by MRI techniques. These current pathways can be computed and spatially mapped. On the other hand, radio frequency (RF) allows measurement of a single component of current density without subject rotation. Its high frequency current does not render the muscle twitching that often occurs during LF-CDI, allowing in-vivo measurements on human subjects.

This treatment is used in scanning, also called as densitometry or dual-energy X-ray absorptiometry (DXA). It requires specific hardware and software and other computing devices that analyses image and printed text then convert them into digital images. This advanced method is being utilized for sophisticated operation of the diseases like cancer.

 


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