Magnetic resonance imaging displays soft tissue images similar to those made with computed tomography ct but without the need for ionizing radiation in addition specially designed magnetic pulse sequences can be used to create magnetic resonance angiograms. Magnetic resonance imaging is a medical application of nuclear magnetic resonance nmr nmr can also be used for imaging in other nmr applications such as nmr spectroscopy . This is a specialty of radiology that looks at the structure of the lungs and heart types of thoracic imaging include x ray ultrasound magnetic resonance imaging mri computed tomography ct and fluoroscopy this type of imaging may be used to diagnose and treat a variety of conditions. Us national library of medicine magnetic resonance imaging versus computed tomography in the evaluation of soft tissue tumors of the extremities a e chang hollis dp nuclear magnetic resonance investigations of human neoplastic and abnormal nonneoplastic tissues cancer res 1975 may 35 51326 1332. Hybrid scanning techniques employing x ray computed tomography ct or magnetic resonance imaging mri assignment 2 nuclear medicine nuclear medicine is a specialized branch of modern medicine that exploits the process of radioactivity for imaging diagnosis and treatment