The is a diagnostic scanning technique that produces high-resolution images of the structures of the brain.

MRI

Explanation:

In radiology, the term MRI refers to Magnetic Resonance Imaging, which is a technique that use scanners that produce magnetic fields and radio waves to create high-resolution images of the different organs of the body.

MRI create high-resolution, detailed images of the internal organ that is being scanned. This technique is widely used to make a diagnosis since it's non-invasive and yet it produces detailed images.

One of the organs that can be scanned using an MRI can be the brain and therefore, we can say that the MRI is a diagnostic scanning technique that produces high-resolution images of the structures of the brain.