TY - CHAP M1 - Book, Section TI - MAGNETIC RESONANCE IMAGING: BASICS A1 - KALYANPUR, TEJAS A1 - HEDGIRE, SANDEEP A1 - BORCZUK, RACHEL A1 - IMANZADEH, AMIR A1 - HARISINGHANI, MUKESH A2 - Butler, Kathryn L. A2 - Harisinghani, Mukesh Y1 - 2015 N1 - T2 - Acute Care Surgery: Imaging Essentials for Rapid Diagnosis AB - Imaging in an emergency setting demands assessment in the shortest possible time. While computed tomography (CT) scan has been the mainstay of cross-sectional imaging in emergency radiology for its rapid image acquisition, magnetic resonance imaging (MRI) can be useful in the emergency setting as well. MRI, with its inherent superior soft-tissue contrast, is highly sensitive for detection of abnormal fluid or edema, thus obviating the need for contrast agents. Lack of ionizing radiation makes it an obvious choice in the abdominal evaluation in pregnant women, and in the pediatric population. Gadolinium based contrast agents are safer than iodinated contrast agents used in CT.1,2 Furthermore, current refinements in MRI technology have resulted in shorter scanning times, which are particularly suited for emergency indications. MRI is therefore not only being increasingly used as a problem-solving tool, but also as a first-line modality. This chapter outlines the indications for MRI as well as the basic sequences and protocols used with an emphasis on the diagnostic approach to emergencies. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/16 UR - accesssurgery.mhmedical.com/content.aspx?aid=1110747698 ER -