In this review article, the effects of old age on lung structure and function are discussed.
Changes in lung morphology and biochemistry are correlated with changes in lung …

(TV2) and mean transit time (MTT) images. Results: SPECT and MTT ¡ magesrepresented
a gravity-induced gradient of ventilation in normal lungs and detailed the distribution of …

To date, there has been neither a good method to clarify the three-dimensional distribution
of pulmonary ventilation/perfusion (V. A/Q.) ratios, nor a convenient way to assess V. A/Q …

In severe chronic heart failure (CHF) the ventilatory cost of CO 2 elimination during exercise
(VE/V CO 2) is increased, suggesting ventilation/perfusion (V/Q) mismatch. The relationship …

Ventilation imaging using positron emission tomography (PET) and highly insoluble nitrogen
13 (N-13) was performed in one healthy volunteer and ten patients. These PET studies …

Regional ventilatory abnormalities in obstructive lung disease were evaluated by dynamic
single-photon emission tomography (SPET) of pulmonary washout of xenon-133 (133 Xe) …

The aim of the present study was to develop and evaluate a method for semi‐quantification
of ventilation‐to‐perfusion ratios in small regions in planar pulmonary scintigrams using …

Voice therapy can improve the vocal quality of elderly patients with voice problems, but little
is known about what happens physiologically. The purpose of the present study was to …

Se describen y explican el funcionamiento y explotación, en investigaciones mé dicas, de
los sistemas de^ adquisición y procesamiento de datos (SAPD) acoplados a la cá mara …

Introduction: Individuals over 65 years make up a growing percentage of the US and world
population, expected to account for over 23% of Americans by the year 2060. Various …