title: [Image changes of hemoglobin in acute and hyperacute intracranial hematoma during hyperintensive magnetic resonance].
abstract: 36 intracranial hematomas between one hour and 7 days were imaged by using magnetic resonance at 1.0 T, with T1-and T2-weighted spin-echo pulse sequences. Characteristic intensity patterns were observed in the evolution of the hematomas, which could be staged as hyperacute (less than 24 hours) and acute (greater than 1 day and less than 7 days). Hyperacute stage could be subdivided into three phases, and hyperacute hematomas were characterized by hypointensity-mild hyperintensity-isointensity on T1-weighted images. Acute stage could be subdivided into three phases, and acute hematomas were characterized by hypointensity (DHB)-hyperintensity (MHB in intact RBC)-hyperintensity (free, undilute MHB in lysed RBC) on T1-weighted images. Acute hematomas were characterized by hypointensity (DHB)-obviously hypointensity (DHB + MHB in intact RBC)-hypointensity (DHB + free, undilute MHB in lysed RBC) on T2-weighted images. Different mechanisms were proposed for these characteristic intensity patterns of hyperacute and acute hematomas.
authors.forename: B
authors.initials: B
authors.lastname: Sui
mesh_terms: D000328:Adult; D000368:Aged; D001921:Brain / Q000473:pathology; D002543:Cerebral Hemorrhage / Q000175:diagnosis* / Q000378:metabolism; D005260:Female; D006406:Hematoma / Q000175:diagnosis* / Q000378:metabolism; D006454:Hemoglobins / Q000378:metabolism*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed
chemical_list: D006454:Hemoglobins