Carl J. Zylak

Lung involvement in angioimmunoblastic lymphadenopathy (ail).

Two patients with angioimmunoblastic lymphadenopathy (AIL) in whom the disease process involved the lungs are reported. One patient died in respiratory failure. Details of the radiologic appearance, abnormalities of lung function and lung histology are presented together with response to steroid therapy in one patient. Life-threatening involvement of the lung parenchyma can be a mode of presentation of the disease and can contribute to the morbidity and mortality of the disorder.

Acute Respiratory Distress in Adults

Several nonpulmonary conditions may cause acute respiratory distress in adults. A review of 75 such patients revealed that the physiological and pathological patterns were constant, but the roentgenologic appearance was variable. Autopsy findings in one-third of the group consistently included heavy, wet lungs. The varied roentgenologic appearance may be attributed to (a) the position of the patient, since fluid seeks dependent spaces; (b) pre-existing vascular alterations; (c) fluid accumulation which is not radiographically apparent; (d) interstitial fluid accumulation prior to distal air-space filling; and (e) overdistension and fibrosis as the result of positive-pressure therapy and high oxygen concentrations.

Roentgen—Anatomical Correlation of the Individual Human Pulmonary Acinus

Individual pulmonary acini were opacified by blocking the corresponding terminal bronchioles of the lung with nylon particles and injecting a mixture of barium sulfate and gelatin into the bronchial tree. Radiographs of individual acini showed a characteristic rosette appearance with an elliptical overall configuration. Anatomical correlation was done by rendering the lung tissue transparent by a clearing process and examining it under a dissecting microscope. Various features of air-space consolidation seen on chest radiographs can be explained by considering the pulmonary acinus as the basic roentgen unit.

ECHOENCEPHALOGRAPHY AS AN ADJUVANT TO THE ROUTINE EXAMINATION OF THE SKULL; TECHNICS AND RESULTS.

Echoencephalography is a use of radiant energy, acoustical rather than electromagnetic, sharing many technics and problems with diagnostic roentgenology. Examination of a two-plane time-intensity echo plot of the skull, the “A” scan, will consistently indicate the position of midline structures and occasionally the position of other structures such as the lateral ventricles. The “B” scan, necessary for successful mass localization, integrates many echoes in a three-dimensional representation. Individual echo depth and relative probe position are displayed on the X and Y axes respectively. Echo dot brightness on the oscilloscope is proportional to echo intensity depicting the Z axis. Material and Methods The material presented is based upon 795 unselected skull x-ray and midline echo studies performed in a six-month period following the acquisition of suitable equipment. As it became immediately apparent that physician operation was logistically undesirable when used in this manner, this investigation was ...

Interhospital Television Transmission of Resident Film-Reading Rounds

Closed-circuit television transmission of interhospital film-reading sessions for radiology residents was found to be of educational value. The technology is briefly described.