ABSTRACT
BACKGROUND AND PURPOSE: With >473,000 annual emergency department visits for children with traumatic brain injuries in the United States, the risk of ionizing radiation exposure during CT examinations is a real concern. The purpose of this study was to assess the validity of rapid MR imaging to replace CT in the follow-up imaging of patients with head trauma. MATERIALS AND METHODS: A retrospective review of 103 pediatric patients who underwent initial head CT and subsequent follow-up rapid MR imaging between January 2010 and July 2013 was performed. Patients had minor head injuries (Glasgow Coma Scale, >13) that required imaging. Initial head CT was performed, with follow-up rapid MR imaging completed within 48 hours. A board-certified neuroradiologist, blinded to patient information and scan parameters, then independently interpreted the randomized cases. RESULTS: There was almost perfect agreement in the ability to detect extra-axial hemorrhage on rapid MR imaging and CT (κ = 0.84, P < .001). Evaluation of hemorrhagic contusion/intraparenchymal hemorrhage demonstrated a moderate level of agreement between MR imaging and CT (κ = 0.61, P < .001). The ability of MR imaging to detect a skull fracture also showed a substantial level of agreement with CT (κ = 0.71, P < .001). Detection of diffuse axonal injury demonstrated a slight level of agreement between MR imaging and CT (κ = 0.154, P = .04). However, the overall predictive agreement for the detection of an axonal injury was 91%. CONCLUSIONS: Rapid MR imaging is a valid technique for detecting traumatic cranial injuries and an adequate examination for follow-up imaging in lieu of repeat CT.
Subject(s)
Brain Injuries/diagnosis , Magnetic Resonance Imaging/methods , Adolescent , Child , Child, Preschool , Emergency Service, Hospital , Female , Humans , Infant , Male , Pediatrics/methods , Radiation Exposure/prevention & control , Retrospective Studies , Tomography, X-Ray Computed/methodsABSTRACT
Son pocos los estudios de vaciamiento gástrico en nuestro medio. Se reunieron 3 grupos de pacientes a los cuales se les realizó vaciamiento gástrico para sólidos marcado con radioisótopos was done. 21 asintomáticos con edad promedio de 33 años. Un segundo grupo constituido por 16 pacientes con Dispepsia no Ulcerosa (DNU). El tercer grupo, 20 pacientes con antecedentes de cirugía gástrica. Encontramos un T-2 normal de 90.33ñ18.27 minutos con una pendiente de menos 0.0091ñ0.0020. En 13 pacientes (81 por ciento) con DNU se encontró retardo del vaciamiento con un T-2 mayor de 120 minutos con una pendiente menor de -0.0048. pSubject(s)
Humans
, Male
, Female
, Dyspepsia
, Gastrectomy
, Radioisotopes
, Gastric Emptying/physiology
ABSTRACT
El estudio de tránsito esofágico con isótopos se ha desarrollado para la evolución de la función motora del esófago. Fueron estudiados con esta técnica 30 voluntarios sanos y 14 casos con evidencia de trastorno motor esofágico.Los valores normales fueron: TTET 11.16ñ1.5 s. En los pacientes con trastorno de motilidad encontramos dos patrones anormales: adinámico y de incoordinación. En 8 de 10 pacientes diferencial de los trastornos motores esofágicos
