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P Lams

Publications and source records attributed to P Lams.

5 recordsLinked to original sources
PubMed1984

An image processing system for digital chest X-ray images.

This paper investigates the requirements for image processing of digital chest X-ray images. These images are conventionally recorded on film and are characterised by large size, wide dynamic range and high resolution. X-ray detection systems are now becoming available for capturing these images directly in photoelectronic-digital form. In this report, the hardware and software facilities required for handling these images are described. These facilities include high resolution digital image displays, programmable video look up tables, image stores for image capture and processing and a full range of software tools for image manipulation. Examples are given of the application of digital image processing techniques to this class of image.

Computers↗
PubMed1983

Massive pulmonary calcification in two infants with congenital cardiac lesions.

Two infants with congenital heart disease and radiographically demonstrated pulmonary calcification are described. One infant also suffered from idiopathic hypercalcaemia and subcutaneous fat necrosis. Diffuse radiographic pulmonary calcification in infants has not been reported previously. The possible aetiology is discussed.

Calcinosis↗
PubMed1980

Radiographic signs in post pneumonectomy bronchopleural fistula.

Four instances of bronchopleural fistula (BPF) occurred in three patients following right pneumonectomy. In all, a striking increase in air content and fall in the fluid level of the pleural space provided to be diagnostic. The radiologic diagnosis of BPF requires monitoring of the air-fluid level in the pneumonectomy space, using a horizontal beam to demonstrate the changing volume of air and fluid regardless of the patient's position. One patient presented with a tension pyopneumothorax without good clinical evidence of BPF and required prompt chest tube drainage for the relief of severe dyspnea; mediastinal shift had occurred toward the remaining lung. Mediastinal shift did not occur in the other patients.

Adenocarcinoma↗
PubMed1979

The opisthion on the lateral radiograph of the cervical spine.

Ten adult dry skulls were radiographed in the lateral projection to evaluate the appearance of the opisthion, the posterior margin of the foramen magnum. The opisthion was seen on all 10 skulls and its position was confirmed by outlining it with barium paste. In cross section, it is a teardrop-shaped structure continuous with the internal occipital crest. A beak-shaped shadow anterior to the opisthion was also examined with the barium technique. It is an overlap shdow formed by the interior margin of the foramen magnum and the inferior border of the occipital bone on the same side. In a review of 50 random radiographs of the cervical spine, the opisthion was identified on 42 (84%) and the beak-shaped overlap shadow was seen on 28 (56%). The spinolaminal line, which delineates the posterior margin of the cervical spinal canal, was an unreliable indicator of the position of the opisthion in 17 (40%) of the 42 cases in which the opisthion could be identified.

Adult↗