title: Anterior layering of excreted 18F-FDG in the bladder on PET/CT: frequency and cause.
abstract: OBJECTIVE
  The objective of our study was to determine the frequency and cause of anterior layering of excreted 18F-FDG in the bladder on PET/CT.
  
  
  CONCLUSIONS
  Anterior layering of excreted FDG in the bladder is commonly seen on PET/CT scans obtained with i.v. iodinated contrast material and is due to displacement of FDG by excreted iodinated contrast material; this phenomenon may unmask FDG-avid bladder disease.
authors.affiliation: Department of Radiology, University of California, San Francisco, Box 0628, M-392, 505 Parnassus Ave., San Francisco, CA 94143-0628, USA.
authors.forename: Derk D
authors.initials: DD
authors.lastname: Purcell
authors.forename: Fergus V
authors.initials: FV
authors.lastname: Coakley
authors.forename: Benjamin L
authors.initials: BL
authors.lastname: Franc
authors.forename: Randall A
authors.initials: RA
authors.lastname: Hawkins
authors.forename: Sophie E
authors.initials: SE
authors.lastname: Boddington
authors.forename: Benjamin M
authors.initials: BM
authors.lastname: Yeh
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003287:Contrast Media / Q000008:administration & dosage; D005260:Female; D019788:Fluorodeoxyglucose F18 / Q000008:administration & dosage / Q000493:pharmacokinetics*; D006801:Humans; D007275:Injections, Intravenous; D007472:Iohexol / Q000008:administration & dosage; D008297:Male; D008875:Middle Aged; D009369:Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology*; D019047:Phantoms, Imaging; D049268:Positron-Emission Tomography / Q000379:methods*; D011859:Radiography; D019275:Radiopharmaceuticals / Q000008:administration & dosage / Q000493:pharmacokinetics*; D012189:Retrospective Studies; D014055:Tomography, Emission-Computed; D001743:Urinary Bladder / Q000378:metabolism*; D001749:Urinary Bladder Neoplasms / Q000000981:diagnostic imaging* / Q000556:secondary*
chemical_list: D003287:Contrast Media; D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18; D007472:Iohexol