The Correct Answer is Only a. Explanation & Key Takeaways: • Magnetic resonance imaging (MRI) is a noninvasive test used to diagnose medical conditions. • MRI uses a powerful magnetic field, radio waves, and a computer to produce detailed pictures of internal body structures. Hence Statement a is correct. • MRI does not use radiation (x-rays). • Magnetic resonance imaging produces clearer images compared to a CT scan. • In instances when doctors need a view of soft tissues, an MRI is a better option than x-rays or CTs. • MRIs can create better pictures of organs and soft tissues, such as torn ligaments and herniated discs, compared to CT images. Hence Statement b is Not Correct. Related Concepts: • A computerized tomography (CT) or computerized axial tomography (CAT) scan combines data from several X-rays to produce a detailed image of structures inside the body. • A CT scanner emits a series of narrow beams through the human body as it moves through an arc. • CT scan also uses X-rays but it uses multiple radiation beams to form a single image.