title: Mechanisms responsible for the MR appearance and evolution of intracranial hemorrhage.
abstract: The sequential degradation of hemoglobin in an evolving hemorrhage has been reviewed. Physical mechanisms of proton relaxation enhancement that contribute to the clinical MR appearances of hemorrhage have been described, and the dependence of relaxation rates on field strength and interecho interval in spin-echo imaging techniques has been defined.
authors: Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia 19104.
authors: J M
authors: JM
authors: Gomori
authors: R I
authors: RI
authors: Grossman
mesh_terms: D000208:Acute Disease; D002543:Cerebral Hemorrhage / Q000097:blood / Q000175:diagnosis* / Q000503:physiopathology; D002908:Chronic Disease; D006454:Hemoglobins / Q000378:metabolism; D006801:Humans; D007501:Iron / Q000097:blood; D008279:Magnetic Resonance Imaging; D008280:Magnetics; D008706:Methemoglobin / Q000378:metabolism; D010108:Oxyhemoglobins / Q000378:metabolism
chemical_list: D006454:Hemoglobins; D010108:Oxyhemoglobins; C100003:deoxyhemoglobin; D008706:Methemoglobin; D007501:Iron