title: Case study of Tc-99m HMPAO brain SPECT imaging in a patient with hepatic encephalopathy and carotid artery stenosis.
abstract: A patient with hepatic encephalopathy is described. An initial SPECT using Tc-99m HMPAO was performed to evaluate relative brain perfusion. The initial brain SPECT images revealed decreased perfusion in the left frontal temporal lobe region. A subsequent carotid Doppler study revealed left-sided carotid artery stenosis. After appropriate medical treatment for elevated NH3 levels and reversal of the patient's symptoms, repeat SPECT brain images showed a normal pattern of activity. The possible causes and significance for these image findings are discussed.
authors.affiliation: Department of Radiology, College of Medicine at the University of Illinois in Chicago, Chicago, IL 60612, USA. MJBlend@uic.edu
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Blend
authors.forename: Mehdi
authors.initials: M
authors.lastname: Rohany
authors.forename: Nicole
authors.initials: N
authors.lastname: Jones-Martinez
authors.forename: Ovidio A
authors.initials: OA
authors.lastname: De Leon
mesh_terms: D000328:Adult; D001921:Brain / Q000000981:diagnostic imaging*; D016893:Carotid Stenosis / Q000150:complications* / Q000000981:diagnostic imaging*; D005260:Female; D006501:Hepatic Encephalopathy / Q000150:complications* / Q000000981:diagnostic imaging*; D006801:Humans; D019690:Technetium Tc 99m Exametazime; D015899:Tomography, Emission-Computed, Single-Photon / Q000379:methods*
chemical_list: D019690:Technetium Tc 99m Exametazime