MATERIALS AND METHODS Patients are positioned for a posterior view be fore a
scintillation camera equipped with a low energy diverging collimatort. The patient first re …

A simple technique is described for generating ventilation/perfusion ratio and
perfusion/ventilation ratio images from the posterior Tc-99m PYP aerosol inhalation and Tc …

METHODS Xenon-i 33 was administered by inhalation from a closed spirometer (Warren
Collins Corp., Braintree, Mass.) at a concentration of 3 mCi per liter of air. The patient was …

METHOD The ventilation-perfusionlung scintigram. An intra venous injection of 2 mCi of Tc-
99m-labeled macroaggregated albumin was given with the subject supine and breathing …

Nonuniform distributions of lung perfusion scintiscans obtained by SPECT were quantified to
supplement qualitative lung scintiscans. A total of 126 lung perfusion scintigraphy …

The purpose of this study was to evaluate the effects of gravity and lung volume on regional
pulmonary perfusion using technetium-99m macroaggregated albumin (99m Tc MAA) single …

Washout can usefully be observed either after in spiration of a single breath or after
prolonged re breathing of a radioactive gaseous mixture. In the studies reported here, the …

METHOD The system(Fig. 1) consists of a Bind@ micronebulizer through which a stream of
air is passed at the rate of 14 liten/min to a 5-liter reser voir bag. Sterile ll: m@ Ifl@ eluted …

Purpose Respiratory gated perfusion single photon emission computed tomography
(SPECT) was applied to reduce respiratory lung motion effects and to reliably assess …

Quantitative perfusion scans were used to predict the proportion of pulmonary function lost
by inclusion of lung in radiotherapy fields. Nineteen patients receiving radiotherapy for …