Transient disappearance of microbleeds in the subacute period based on T2*-weighted gradient echo imaging in traumatic brain injury.
We report three cases of traumatic microbleeds evaluated by sequential observation. Hypo-intensities on T2* gradient echo imaging (T2*GEI) appeared just 2-3 h after the injury (the hyper-acute period). However, these hypo-intensities on T2*GEI disappeared or became obscure 2-6 days after the injury (the subacute period). A follow-up MRI again revealed clear hypo-intensities on T2*GEI 1-3 months after the injury (the chronic period). Our cases indicate that hypo-intensities on T2*GEI might change dynamically from the hyper-acute to the chronic period. The differences of susceptibility effects by hematoma age might be the cause of this dynamic change.
Department of Neurosurgery, Akita Red Cross Hospital, 222-1 Nawashirosawa, Saruta, Kamikitate, Akita, 010-1495, Japan. watanabejun1003@yahoo.co.jp.
Jun
J
Watanabe
Department of Neurosurgery, Akita Red Cross Hospital, 222-1 Nawashirosawa, Saruta, Kamikitate, Akita, 010-1495, Japan.
Jun
J
Maruya
Department of Neurosurgery, Nagano Red Cross Hospital, Nagano, Japan.
Yu
Y
Kanemaru
Department of Radiology, Akita Red Cross Hospital, Akita, Japan.
Takaharu
T
Miyauchi
Department of Neurosurgery, Akita Red Cross Hospital, 222-1 Nawashirosawa, Saruta, Kamikitate, Akita, 010-1495, Japan.
Keiichi
K
Nishimaki
D000293:Adolescent; D000070642:Brain Injuries, Traumatic / Q000150:complications / Q000000981:diagnostic imaging*; D002648:Child; D005260:Female; D006406:Hematoma / Q000000981:diagnostic imaging* / Q000209:etiology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male
Diffuse axonal injury; Magnetic resonance imaging; Microbleeds; T2*-weighted gradient echo imaging; Traumatic brain injury