RESUMEN
Early diagnosis and prompt initiation of adequate treatment are essential for clinical outcome in ISCA. We report a case in which DWI provided a more specific diagnosis than conventional MR imaging and allowed differentiation of a ring-enhancing lesion from intramedullary tumor. Diagnosis was proved by PCR from CSF (Streptococcus intermedius). Adequate antibiotic treatment was immediately initiated, and the patient recovered completely.
Asunto(s)
Imagen de Difusión por Resonancia Magnética/métodos , Absceso Epidural/patología , Médula Espinal/patología , Anciano de 80 o más Años , Femenino , HumanosRESUMEN
PURPOSE: To evaluate the accuracy of craniofacial 3D models produced in the standardized selective laser sintering (SLS) technique from multislice computed tomography (MSCT) data sets in comparison with patient data and to investigate the effect of potential causes of inaccuracies. MATERIALS AND METHODS: 19 models were considered and examined by MSCT. The patient CT data used for 3D modeling was analyzed and compared to the 3D model data. 15 anatomical landmarks were defined and 20 distances were digitally measured. The digital measurements of both CT data sets were compared to manually measured distances of the SLS model. RESULTS: There was not a statistically significant difference (p < 0.05) between the measurements of the distances concerning all three groups (patient CT data, model CT data, manual measurement of the model). The mean values of the differences were between 0.5455 and -0.3214 mm. CONCLUSION: We found a high accuracy of SLS 3D models, which is due to a high precision in the modeling process and to the small voxel size of patient CT data achieved by MSCT. Anatomical landmarks in patient and model CT data sets and on the 3D model were able to be accurately reproduced, which is important for preoperative planning.
Asunto(s)
Cefalometría/métodos , Simulación por Computador , Huesos Faciales/diagnóstico por imagen , Huesos Faciales/cirugía , Procesamiento de Imagen Asistido por Computador/métodos , Imagenología Tridimensional/métodos , Rayos Láser , Mandíbula/diagnóstico por imagen , Mandíbula/cirugía , Modelos Anatómicos , Cráneo/diagnóstico por imagen , Cráneo/cirugía , Cirugía Asistida por Computador/métodos , Tomografía Computarizada Espiral/métodos , Adolescente , Adulto , Anciano , Niño , Diseño Asistido por Computadora , Femenino , Humanos , Masculino , Persona de Mediana Edad , Sensibilidad y Especificidad , Programas Informáticos , Adulto JovenAsunto(s)
Neoplasias/diagnóstico por imagen , Tomografía Computarizada de Emisión , Tomografía Computarizada por Rayos X , Carcinoma Broncogénico/diagnóstico por imagen , Neoplasias Colorrectales/diagnóstico por imagen , Fluorodesoxiglucosa F18 , Humanos , Neoplasias Pulmonares/diagnóstico por imagen , Metástasis Linfática/diagnóstico por imagen , Radiofármacos , Factores de TiempoRESUMEN
An infected cyst in autosomal dominant polycystic kidney disease was identified with a combined positron emission tomographic (PET) and computed tomographic (CT) system, an experimental setup mimicking an integrated CT-PET scanner. Image fusion of fluorine 18 fluorodeoxyglucose PET and CT images allowed exact localization of the infected cyst among many cysts identified on previous CT and magnetic resonance images. Confirmation was obtained instantly, followed by CT-guided percutaneous puncture. Integrated imaging systems hold promise for direct PET-guided puncture of areas of increased fluorodeoxyglucose uptake by using the anatomic accuracy of CT.