Radionuclide evaluation of regional lung function in children.

A method suitable for the study of regional lung function in children 
is described. The method is simple to perform, takes only 2 
min, and provides pictorial and numerical information on regional ventilation and 
perfusion and a scaling factor measured after rebreathing to account for 
regional variation in lung size and shielding. Although the availability of 
a computer system such as the one described in the text 
is essential for precise and rapid numerical evaluation, nuclear medicine laboratories 
that lack this facility but have a gamma camera could use 
this method to obtain scintigraphic information alone. 