E. Robert Heitzman

Computed tomography of the lung.

Preliminary work has shown that normal lungs have predictable CT patterns and density ranges. In emphysema, there are irregular zones of extremely low density as well as an overall low mean density. CT appears to have considerable potential for early detection of pulmonary emphysema and characterization of the degree of involvement. CT can also be useful in the study of physiological phenomena such as regional blood flow.

Computed tomography of the mediastinum. Normal anatomy and indications for the use of CT.

Correlative CT studies of a cadaver and a statistical analysis of all thoracic scans performed in the first year of operation of a delta-Scan 50 were undertaken in order to better understand normal mediastinal anatomy as displayed by computed tomography. Several levels are illustrated, and the results of the analysis are reported. The authors propose a list of indications for which CT of the mediastinum seems to be helpful.Correlative CT studies of a cadaver and a statistical analysis of all thoracic scans performed in the first year of operation of a delta-Scan 50 were undertaken in order to better understand normal mediastinal anatomy as displayed by computed tomography. Several levels are illustrated, and the results of the analysis are reported. The authors propose a list of indications for which CT of the mediastinum seems to be helpful.

The radiological diagnosis of pneumonia in the adult: A commentary

Almost ten years ago, an issue of Seminars in Roentgenology (Vol. 15, No 1) reviewed the radiological aspects of the pneumonias in depth. This article is an effort to update that material and to provide some personal opinions and prejudices. The broad topic of opportunistic lung infection will not be discussed

Human immunodeficiency virus infection in children

The incidence of Acquired Immune Deficiency Syndrome (AIDS) in the pediatric population is increasing. Estimates are that in 1993 AIDS will be among the five leading causes of death in children. AIDS progresses more rapidly in children than in adults. It also has features that are unique to children, such as recurrent bacterial infections, bronchus-associated lymphoid tissue (BALT), and basal ganglia calcification. This review is written with emphasis on aspects of AIDS unique to children. Features of AIDS that are similar in adults are not discussed.

Transmission Computed Tomographic Diagnosis of Experimentally Produced Acute Pulmonary Vascular Occlusion in the Dog

Acute experimental pulmonary arterial occlusions were produced in 5 dogs. The chest was subsequently imaged with computed tomography (CT), 99mTc-MAA scintigraphy, and plain radiography. Gamma images revealed all 6 lesions, and plain radiographs were uniformly negative. Enhanced CT scans demonstrated 3 of 5 lesions, and unenhanced scans revealed 1 of 6. CT findings were variable.

Air-fluid level in axillary vein simulating abscess

Demonstration of an air-fluid level in the body wall on a computed tomography examination usually suggests the presence of an abscess or a postoperative fluid collection. However, the small amount of air that frequently is injected during intravenous contrast administration may result in a similar computed tomography appearance.