15.17 Radiology Terms

Available radiologic glossaries include the following: ▪ Thoracic radiology: “Glossary of Terms for Thoracic Radiology”▪ Computed tomography of the lung: “Glossary of Terms for CT of the Lungs”▪ Breast imaging: BI-RADS Atlas▪ Magnetic resonance: ACR Glossary of MRI Terms, Glossary of Magnetic Resonance Terms▪ Ultrasonography: Recommended Ultrasound Terminology▪ General, for laypersons and nonspecialists: RadiologyInfoIn addition to the terminology explained in this section, see , Correct and Preferred Usage of Common Words and Phrases, for terms such as radiography, radiology, radiograph, and film; , Abbreviations, Radioactive Isotopes, and , Isotopes; and , Units of Measure, for units such as H (Hounsfield) ...Less

The following terms are commonly used in radiology.b value The b factor or b value is associated with diffusion-weighted magnetic resonance imaging (diffusion-weighted MRI or DWI). It measures “strength (intensity and timing) of the diffusion gradient”; units are seconds per square millimeter.maximum b value of 1221 s/mm2 Four gradient strengths were applied, resulting in b values of 0 and 1000 s/mm2 applied sequentially in the X, Y, and Z gradient directions.Doppler See , Cardiology, Echocardiography.echo train A sequence of echoes. “Echo train is not a unit of measure” but is expressed as in these examples: echo train length 5 echo ...Less