RESUMEN
In this article, the normal radiographic patterns, normal variants, and biologic behavior of the thymus are reviewed. The imaging of thymic pathology is also described.
Asunto(s)
Timo/diagnóstico por imagen , Adolescente , Adulto , Anciano , Quistes/diagnóstico por imagen , Síndrome de DiGeorge/diagnóstico por imagen , Femenino , Hemorragia/diagnóstico por imagen , Humanos , Lactante , Recién Nacido , Enfermedades Linfáticas/diagnóstico por imagen , Masculino , Persona de Mediana Edad , Timoma/diagnóstico por imagen , Timo/anomalías , Timo/anatomía & histología , Hiperplasia del Timo/diagnóstico por imagen , Neoplasias del Timo/diagnóstico por imagen , Tomografía Computarizada por Rayos XAsunto(s)
Angiografía , Trasplante de Riñón , Inmunología del Trasplante , Urografía , Rechazo de Injerto , Humanos , Terapia de Inmunosupresión , Radioisótopos de Yodo , Riñón/diagnóstico por imagen , Métodos , Renografía por Radioisótopo , Diálisis Renal , Tecnecio , Factores de Tiempo , Trasplante HomólogoRESUMEN
Twenty-nine patients with 32 abdominal fistulas were evaluated by sinograms and CT. Sinograms were superior to CT in displaying the fistulous tract and its communications to specific organ systems. Ct added information affecting treatment plan or surgical approach by defining extent, nature and location of underlying disease, by eliminating overlap opacified fistulas, cavities, bowel loops and surface contaminations and by detecting additional undrained abscesses or recurrent tumor masses. While sinograms remain the initial procedure in the evaluation of abdomina fistulas, CT offers a useful secondary modality in selected instances.
Asunto(s)
Fístula/diagnóstico por imagen , Radiografía Abdominal , Enfermedades de la Piel/diagnóstico por imagen , Tomografía Computarizada por Rayos X , Músculos Abdominales/diagnóstico por imagen , Fístula Biliar/diagnóstico por imagen , Humanos , Fístula Intestinal/diagnóstico por imagen , Fístula Pancreática/diagnóstico por imagen , Enfermedades Peritoneales/diagnóstico por imagen , Estudios Prospectivos , Fístula Urinaria/diagnóstico por imagenRESUMEN
The livers of 86 patients comprising this report were examined by both transmission computerized tomography (CT) and radionuclide scans (LS). Fifty-nine of them were also examined by gray-scale ultrasound (US). In a comparative study, the strengths and weaknesses of each modality were evaluated. CT demonstrated 85%. US 82%, and LS 73% of masses involving the liver. Because of better resolution and sectioning capabilities, together with stop-motion imaging, CT and US detected smaller and deeper mass lesions than did LS. However, LS was more informative in hepatocellular disorders than was US or CT. Our experience indicated that information obtained on the liver and surrounding structures by each imaging modality used here tends to be somewhat unique, and thus these procedures complement one another rather than being competitive.
Asunto(s)
Hepatopatías/diagnóstico por imagen , Hepatopatías/diagnóstico , Tomografía Computarizada por Rayos X , Ultrasonografía , Humanos , Neoplasias Hepáticas/diagnóstico , Neoplasias Hepáticas/diagnóstico por imagen , CintigrafíaRESUMEN
A method using CT after endoscopic retrograde pancreatography (CT-ERP) is described for pancreatic imaging. When using an ERP technique in the canine model comparable to that used in humans, small amounts of contrast material in peripheral pancreatic radicles resulted in enhancement of the pancreas on CT scans. Nine patients were also studied by CT-ERP. In normal patients (n = 5) there was opacification of the entire pancreas on CT-ERP images. The main pancreatic duct was seen on delayed images. In cases of chronic pancreatitis (n = 2), pancreatic opacification was patchy and heterogeneous. There was no contrast-material enhancement in areas of pancreatic carcinomas (n = 2). CT-ERP showed the true extent of carcinoma better than ERP alone.
Asunto(s)
Colangiopancreatografia Retrógrada Endoscópica , Diatrizoato de Meglumina/administración & dosificación , Diatrizoato/análogos & derivados , Páncreas/diagnóstico por imagen , Enfermedades Pancreáticas/diagnóstico por imagen , Tomografía Computarizada por Rayos X , Adulto , Anciano , Animales , Perros , Femenino , Humanos , Laparotomía , Masculino , Persona de Mediana Edad , Tomografía Computarizada por Rayos X/métodosRESUMEN
Egyptian mummies have been popular subjects of radiographic investigation since 1896. Computed tomography (CT) and magnetic resonance imaging (MRI) have recently been added to the growing list of modern techniques used to study these relics. The Minnesota Mummy Project was organized to examine four well preserved Egyptian mummies dating from the XVIIIth (1575-1308 B.C.) and XXVth (715-663 B.C.) Dynasties. Plain radiographs and CT scans were obtained on all specimens. One individual was selected for additional endoscopic and microscopic correlation with CT findings in the thoracic cavity. The collapsed heart was identified by CT. A percutaneous biopsy of the heart was then performed with a flexible fiberoptic endoscope, passed through a small hole drilled into the chest wall. Microscopy of prepared ventricular specimens revealed striated muscle fibers consistent with myocardium. These results emphasize the utility of CT as a noninvasive paleoradiologic tool. Another mummy was examined by MRI to search for minute quantities of residual moisture possibly trapped within the desiccated tissues. Only a free-induction-decay signal could be obtained, but this was insufficient to generate an image. Thus, it appears that present MRI is not suitable for the paleopathologic investigation of dehydrated structures.