X-Rays vs. MRIs: How Do DR Systems Differ From Magnetic Resonance Imaging?

WILMINGTON, N.C. - May 22, 2014 - PRLog -- X-Rays vs. MRIs: How Do DR Systems Differ From Magnetic Resonance Imaging?

In terms of imaging, x-rays performed by modern DR systems and MRIs are the two most common types of tests ordered by physicians. But, what exactly is the difference between these two processes and when one is used over the other?

Application Comparison

An x-ray is typically the first test ordered in any case involving conditions affecting the patient's musculoskeletal system. X-rays are used to help diagnose broken bones, detect diseased tissue, and identify other problems within the body's skeletal structure. A standard x-ray procedure takes just a few seconds to complete.

MRIs, on the other hand, are used to help diagnose conditions affecting the body's soft tissue. MRIs are used to diagnose tendon and ligament injuries, spinal cord injuries, tumors, and other problems in the body's soft tissue. Unlike x-rays, MRIs are lengthier procedures. They can often take 30 minutes or longer to complete, some as long as 90 minutes, during which the patient must remain completely still.

In many cases, however, an x-ray is ordered prior to the patient receiving an MRI.

Radiation Exposure

X-ray machines expose the patient to minimal levels of ionizing radiation. However, the amount of exposure is very limited and not found to be conducive to future health problems. MRIs do not use radiation in their processes. Instead, these machines place the patient in a strong oscillating magnetic field where frequency waves are directed at a specific point on the patient's body.

While no biological hazards have been associated with MRIs, overexposure to x-rays has been shown to have the ability to create birth defects and other diseases.

Cost Comparison

X-rays are a considerably less expensive imaging process when compared to MRIs. A typical x-ray costs about $70, while an MRI can cost anywhere between $1,200 and $4,000 (with contrast).

Detail Comparison

Of the two processes, x-rays have the benefit of producing significantly more detailed images. The reason is because bones absorb the x-rays and this makes them stand out more prominently on the photographic films. MRI machines demonstrate the subtle differences between different types of soft tissues and as a result, the images are not as defined as those found on x-rays which detail the differences between hard bone density and soft tissue.

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