High-resolution Computed Tomography Appearances Research Articles

Double accessory fissures in the upper lobe of the right lung (double azygos fissures?): high resolution computed tomography appearance

Double accessory fissures in the upper lobe of the right lung (double azygos fissures?): high resolution computed tomography appearance

HRCT in small and large airways diseases.

High-resolution computed tomography (HRCT) is being increasingly used in the diagnostic work-up of paediatric patients with large and small airways disease due to its ability to provide valuable information far beyond that of other non-invasive investigations. This article highlights the key HRCT appearances of a range of conditions involving the airways in children, and where relevant, the role of HRCT in assessment of disease severity and monitoring of disease progression.

CT anatomy of pterygopalatine fossa and its communications: a pictorial review

In this article, we present a pictorial review computed tomography (CT) anatomy of pterygopalatine fossa and its communications. Since it represents a major pathway for spread of inflammatory or neoplastic disease between the various compartments, being familiar with the high resolution CT appearance of pterygopalatine fossa and its communications is necessary in selected cases. The diagnostic difficulties in determining the intercompartmental spread is discussed.

Various diffuse infiltrative lung diseases: high resolution computed tomography appearances.

High resolution CT (HRCT; 1-2 mm collimation scans reconstructed with a high spatial frequency algorithm) is an established technique for the evaluation of diffuse infiltrative lung diseases. For many of these diseases, the features shown on HRCT correlate well with the histopathological abnormalities. The purpose of this pictorial essay is to illustrate HRCT appearances in various diffuse infiltrative lung diseases.

Costal pleura: appearances at high-resolution CT.

The appearance of the costal pleura at high-resolution computed tomography (CT) was evaluated with a cadaver and 25 normal subjects. This was contrasted with the high-resolution CT appearance of the costal pleura in 15 patients with mild pleural thickening, 13 of whom had been exposed to asbestos. On high-resolution CT scans in the normal subjects, a 1-2-mm-thick line of soft-tissue attenuation at the point of contact between lung and chest wall represents the visceral and parietal pleura, pleural contents, endothoracic fascia, and innermost intercostal muscle. In a paravertebral location, the innermost intercostal muscle is lacking, and a thin line seen on high-resolution CT scans reflects pleura and endothoracic fascia. Transverse thoracic and subcostal muscles and extrapleural fat pads can be seen as tissue internal to a rib and may be confused with pleural thickening. In 13 of the 15 patients with mild pleural thickening, the 1-3-mm-thick pleura was separable from the underlying normal intercostal muscle by a layer of extrapleural fat. High-resolution CT was more sensitive than CT with 1-cm collimation in depicting this degree of pleural abnormality.