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The primary advantage of MRI over CT scanning is its ability to provide superior soft tissue contrast. This quality makes MRI particularly valuable in imaging structures where differentiation between various types of soft tissue is critical, such as in the brain, muscles, and organs within the abdomen. The MRI uses magnetic fields and radio waves to generate detailed images without the use of ionizing radiation, which can highlight differences in tissue properties more effectively than CT scans. This capability allows for better evaluation of conditions such as tumors, inflammation, and injuries within soft tissues, leading to more accurate diagnoses and treatment plans.

In contrast, other options such as the speed of imaging and radiation exposure differences do not reflect the primary strength of MRI, which lies in its soft tissue imaging capabilities. Furthermore, while MRI inherently has a safety profile regarding radiation exposure, this is secondary to the primary benefit of contrast sensitivity in soft tissues.