BACKGROUND: Positron emission tomography, performed with isotopes of very short half
life, can be used to relate local lung tissue density to local ventilation and to the ventilation …

Positron emission tomography is a major technological advance in the characterisation of
structure-function relationships within and between regions in normal and abnormal lungs …

The adaptation to positron emission tomography of the steady-state technique for the
measurement of alveolar ventilation, based on the shortlived radionuclide neon-19 (T,= 17.4 …

Data obtained during positron emission tomographic (PET) imaging of the lung are
expressed in terms of lung volume, not lung weight. Therefore changes in PET data may …

The authors measured the regional pulmonary ventilation/perfusion ratio with intravenous
13 N in saline solution, using positron emission tomography, in eight normal healthy …

A technique has been developed to measure regional values of vascular and extravascular
lung density using positron emission and transmission tomography. Quantitative values of …

In patients with pulmonary emphysema, emphysematous changes are not uniform and vary
from minimum alveolar destruction to advanced bullous formation, depending on the lobe or …

Regional lung density (g lung/ml thoracic volume) and fractional pulmonary blood volume
(ml blood/ml thoracic volume) have been measured by positron tomography in 10 patients …

Regional measurements of tissue isotope concentration, made using positron emission
tomography (PET), allow tracer models to be used in a quantitative manner to provide …

CT is the most accurate method to detect pulmonary emphysema in vivo. We compared
prospectively two different methods for emphysema quantitation in 5 normal volunteers and …