Dennis Elam

Improved Radioaerosol Administration System for Routine Inhalation Lung Imaging

An improved radioaerosol administration system has been developed to reduce the number of droplets larger than 2.0 micron in diameter which have caused abnormal hyperdeposition of inhaled aerosols in the large airways. The new system has achieved this goal by interposing a reservoir-setting bag in the aerosol delivery line between the nebulizer and the patient. The components are inexpensive, commercially available and easily assembled in any nuclear medicine service.

Aerosol Inhalation in Lung Imaging

The authors describe recent advances in the use of wet and dry aerosols in lung scintigraphy. Dry aerosol inhalation has been greatly improved by administration as a powder in a single breath, permitting one to obtain images of good information density in one minute or less. The wet aerosol procedure was made three to five times more efficient by replacing the air blower of a commercially available ultrasonic nebulizer with a demand valve.