RT Book, Section A1 Twickler, Diane M. A2 Fleischer, Arthur C. A2 Toy, Eugene C. A2 Lee, Wesley A2 Manning, Frank A. A2 Romero, Roberto J. SR Print(0) ID 1106711716 T1 MAGNETIC RESONANCE IMAGING IN OBSTETRICS T2 Sonography in Obstetrics and Gynecology: Principles & Practice, 7e YR 2015 FD 2015 PB McGraw-Hill Education PP New York, NY SN 9780071547727 LK obgyn.mhmedical.com/content.aspx?aid=1106711716 RD 2024/03/28 AB DefinitionsDiffusion-weighted imaging: an MR sequence that produces images of water diffusion, which reflects hypoxic edema of the brain.MR imaging: modality that uses high field strength magnets, radio frequencies, and a computerized analysis to produce detailed in vivo images of internal anatomy of the body.Orthogonal views: MR views at right angles to each other, typically axial, coronal, and sagittal views of the fetus.Signal void: the appearance of darkness on an image based on low MR signal that helps characterize tissues and fluid on certain sequences.T2-weighted imaging: MR technique that defines fetal anatomy and dysmorphology with specific tissue characteristics based on a specific spin echo sequence using a long repetition time and long echo time.T1-weighted imaging: MR technique that is less sensitive for anatomy but highlights certain characteristics of fat, certain stages of bleeding, liver, and meconium in the colon at later gestations based on a specific spin echo sequence using a short repetition time and short echo time.Volumetry: measurement by volume calculated by areas multiplied by slice thickness.