TY - CHAP M1 - Book, Section TI - VOLUME SONOGRAPHY: CORE CONCEPTS FOR CLINICAL PRACTICE A1 - Bega, George A2 - Fleischer, Arthur C. A2 - Toy, Eugene C. A2 - Lee, Wesley A2 - Manning, Frank A. A2 - Romero, Roberto J. PY - 2015 T2 - Sonography in Obstetrics and Gynecology: Principles & Practice, 7e AB - DefinitionsThree-dimensional ultrasonography (3DUS or volume sonography): an imaging method that fundamentally converts digital 2D picture elements (pixels) into 3D voxels.Four-dimensional ultrasonography: an imaging method that adds the dimension of time to volume data sets acquired using 3DUS that is especially useful for the fetal heart and moving limbs.Multiplanar display: the instantaneous and interactive display of 3 perpendicular views (ie, sagittal, transverse, and coronal views).Voxel: short for volume pixel. It is the smallest unit of a three-dimensional volume equivalent of a pixel in a 2D image.Rendering: the process of displaying groups of voxels with post-processing software to display either surface features (surface rendering) or internal anatomic structures (volume rendering).Reformatting: the process of volume exploration where particular image planes are obtained either in a multiplanar or rendered display.STIC (spatio-temporal image correlation): a volume analysis technique that is designed to acquire and display moving volumes of the fetal heart.Matrix 2D array: a transducer with a large number of piezoelectric elements that allow electronic steering and rapid real-time acquisition of moving objects such as the fetal heart.Volume contrast imaging: a 3D image projection that is variably defined by several layers of voxels (i.e. "thick slice") rather than from a thin layer of pixels used for 2D ultrasonography. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/28 UR - obgyn.mhmedical.com/content.aspx?aid=1106711356 ER -