UK audit of relative lung function measurement from planar radionuclide imaging.

Background: Quantitative measurements of regional lung ventilation and perfusion are useful adjuncts to image interpretation.

Aim: This study investigated the accuracy and precision of the software used to carry out such measurements in the UK.

Methods: Ten examples of perfusion distribution, representing the range of patterns expected in practice, were simulated on computer using a segmental model of the lung and real three-dimensional lung shapes obtained from magnetic resonance images.