Asunto(s)
Síndrome de Hiperostosis Adquirido/diagnóstico , Fluorodesoxiglucosa F18 , Tomografía de Emisión de Positrones/métodos , Medronato de Tecnecio Tc 99m , Tomografía Computarizada por Rayos X/métodos , Síndrome de Hiperostosis Adquirido/metabolismo , Adolescente , Femenino , Fluorodesoxiglucosa F18/farmacocinética , Humanos , Radiofármacos/farmacocinética , Enfermedades de la Piel/diagnóstico por imagen , Enfermedades de la Piel/metabolismo , Técnica de Sustracción , Medronato de Tecnecio Tc 99m/farmacocinéticaRESUMEN
Estimation of liver volume using routine CT scans has been described previously. We have, however, not found a gold standard study which analyzes the effect of section thickness on the estimation of liver volume using CT images. In the present study, five normal livers obtained from cadavers were scanned using a Spiral CT Scanner (Xpress/GX Toshiba, Tocigi-Ken) in the horizontal plane. Consecutive sections at a thickness of 10, 5 and 1mm were used to estimate the total volume of the livers by means of the Cavalieri principle. With a view to evaluating inter-observer differences, liver volume was estimated by three observers. The estimated volume using the classical volume estimation formula did not concur with the actual volume of the livers obtained by the fluid displacement technique. The section thickness has an over- or under-projection effect on the estimated volume. The obtained volume estimation results were, therefore, calibrated using three different approaches. The volume obtained by the calibration formulae did not differ statistically from actual liver volumes (P<0.05). There were also no significant differences between the performers' estimates (P>0.05). Results showed that the effect of section thickness on the volume estimates could not be omitted and the obtained values could be calibrated using the proposed approaches presented in this study.
Asunto(s)
Anatomía Transversal/métodos , Imagenología Tridimensional/métodos , Hígado/anatomía & histología , Hígado/diagnóstico por imagen , Tamaño de los Órganos , Intensificación de Imagen Radiográfica/métodos , Interpretación de Imagen Radiográfica Asistida por Computador/métodos , Algoritmos , Cadáver , Humanos , Técnicas In Vitro , Pruebas de Función Hepática/métodos , Reproducibilidad de los Resultados , Sensibilidad y EspecificidadAsunto(s)
Artralgia/diagnóstico , Enfermedad de Erdheim-Chester/diagnóstico por imagen , Medronato de Tecnecio Tc 99m , Artralgia/etiología , Enfermedades Óseas Metabólicas/diagnóstico , Neoplasias Óseas/diagnóstico , Diagnóstico Diferencial , Femenino , Articulación de la Cadera/diagnóstico por imagen , Humanos , Persona de Mediana Edad , Neoplasias de los Músculos/diagnóstico , Osteítis Deformante/diagnóstico , Cintigrafía , RadiofármacosRESUMEN
Spine duplication, which is at the severe end of the split cord malformation, is rarely seen. Radiographic, CT, and MR images of a 15-year-old girl who had lower back pain showed asymmetric lumbar spine duplication with spinal cord tethering secondary to a filum lipoma in the sacrum. Despite gross spinal abnormalities, the patient was neurologically intact and has been followed up with conservative treatment.
