aUniversity of Wisconsin School of Medicine and Public Health, Madison, Wisconsin. bNYU Grossman School of Medicine, New York, New York. cPanel Chair, Brigham & Women's Hospital, Boston, Massachusetts. dPanel Chair, University of California San Diego, San Diego, California. ePanel Vice-Chair, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts. fGlobal Advanced Imaging, PLLC, Little Rock, Arkansas; Commission on Nuclear Medicine and Molecular Imaging. gUniversity of Texas Health Science Center at Houston and McGovern Medical School, Houston, Texas; American Gastroenterological Association. hMayo Clinic, Rochester, Minnesota; Society for Cardiovascular Magnetic Resonance. iOchsner Hospital, Baton Rouge, Louisiana. jUMass Memorial Health and UMass Chan Medical School, Worcester, Massachusetts; Committee on Emergency Radiology- GSER. kUniversity of North Carolina at Chapel Hill, Chapel Hill, North Carolina. lVA Puget Sound Health Care System and University of Washington, Seattle, Washington. mUniversity of California San Diego, San Diego, California. nSpecialty Chair, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin. oSpecialty Chair, Brigham & Women's Hospital, Boston, Massachusetts. Reprint requests to: publications@acr.org Nonvariceal Upper Gastrointestinal Bleeding confidence in appropriate diagnosis, especially in patients without findings of bleeding on CT [12]. Additionally, low-keV images can be used to reduce the volume of intravenous (IV) contrast used. However, the use of these virtual unenhanced images in place of true unenhanced images is still limited to certain sites and remains a user- specific preference [5]. Hence, considerations specific to virtual noncontrast images are not discussed in this document. All elements are essential: 1) timing, 2) reconstructions/reformats, and 3) 3-D renderings. Standard CTs with contrast also include timing issues and reconstructions/reformats.
Nonvariceal Upper Gastrointestinal Bleeding. aUniversity of Wisconsin School of Medicine and Public Health, Madison, Wisconsin. bNYU Grossman School of Medicine, New York, New York. cPanel Chair, Brigham & Women's Hospital, Boston, Massachusetts. dPanel Chair, University of California San Diego, San Diego, California. ePanel Vice-Chair, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts. fGlobal Advanced Imaging, PLLC, Little Rock, Arkansas; Commission on Nuclear Medicine and Molecular Imaging. gUniversity of Texas Health Science Center at Houston and McGovern Medical School, Houston, Texas; American Gastroenterological Association. hMayo Clinic, Rochester, Minnesota; Society for Cardiovascular Magnetic Resonance. iOchsner Hospital, Baton Rouge, Louisiana. jUMass Memorial Health and UMass Chan Medical School, Worcester, Massachusetts; Committee on Emergency Radiology- GSER. kUniversity of North Carolina at Chapel Hill, Chapel Hill, North Carolina. lVA Puget Sound Health Care System and University of Washington, Seattle, Washington. mUniversity of California San Diego, San Diego, California. nSpecialty Chair, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin. oSpecialty Chair, Brigham & Women's Hospital, Boston, Massachusetts. Reprint requests to: publications@acr.org Nonvariceal Upper Gastrointestinal Bleeding confidence in appropriate diagnosis, especially in patients without findings of bleeding on CT [12]. Additionally, low-keV images can be used to reduce the volume of intravenous (IV) contrast used. However, the use of these virtual unenhanced images in place of true unenhanced images is still limited to certain sites and remains a user- specific preference [5]. Hence, considerations specific to virtual noncontrast images are not discussed in this document. All elements are essential: 1) timing, 2) reconstructions/reformats, and 3) 3-D renderings. Standard CTs with contrast also include timing issues and reconstructions/reformats.