[Utility of diffusion-weighted magnetic resonance imaging in severe focal traumatic brain injuries]. / Utilidad de la resonancia magnética potenciada en difusión en pacientes con lesiones focales por traumatismo craneoencefálico grave.
Med Intensiva
; 37(6): 375-82, 2013.
Article
en Es
| MEDLINE
| ID: mdl-23009901
OBJECTIVE: To describe the apparent diffusion coefficient (ADC) in a series of severe traumatic brain injuries, their clinical and outcome features, and possible implications. DESIGN: A descriptive, observational case-series study was carried out. PATIENTS AND INTERVENTIONS: Patients with severe traumatic brain injuries (TBIs) admitted to the ICU were subjected to MRI study using a 1.5 T scanner. Diffusion-weighted images (DWMR) were obtained using the following echo-planar pulse sequence: TR 10000 ms, TE 126.9 ms, with b values 1000 s/mm2 in the three spatial dimensions. Combining the three sets of images, an isotropic image conforming a map of the mean ADCs was obtained. RESULTS: DWMR was performed in 23 patients with severe TBI admitted to the ICU between 2001 and 2004. In the MR images we selected 26 regions of interest (ROIs) where ADC was recorded. We observed a clear increase in diffusion in non-treated space-occupying lesions versus other types of injuries and the normal values. A poorer outcome was recorded in patients with lower ADC values. CONCLUSIONS: Mean ADC in the lesions was greater than the normal values and greater in contusions than in other types of injuries, as an expression of extracellular edema. ADCs were decreased in patients with a poor outcome, suggesting an association between ischemia and the patient prognosis.
Palabras clave
Apparent diffusion coefficient; Brain injuries; Coeficiente de difusión aparente; Cytotoxic brain edema; Diffusion-Weighted Magnetic Resonance Imaging; Echo-planar imaging; Edema cerebral citotóxico; Edema cerebral vasogénico; Escala de resultados de Glasgow; Glasgow Outcome Scale; Imagen eco-planar; Lesiones cerebrales; Resonancia magnética de difusión; Vasogenic brain edema
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Lesiones Encefálicas
/
Imagen de Difusión por Resonancia Magnética
Tipo de estudio:
Observational_studies
/
Prognostic_studies
Límite:
Adult
/
Female
/
Humans
/
Male
Idioma:
Es
Revista:
Med Intensiva
Año:
2013
Tipo del documento:
Article
Pais de publicación:
España