Assessing Regional Lung Function in Single Lung Transplant (slt) Recipients Using A New Vibration Response Imaging (vri) Technology

PURPOSE: Background: In a well functioning graft following SLT most of the ventilation (V) and perfusion (Q) shifts to the transplanted (Tx) side. A routing V/Q scan is performed periodically to asses the graft function. Chest auscultation usually discloses a difference between the Tx and non-Tx lungs, however no quantitative nor regional assessment can be done by the physical examination.VRI is a new system that records the vibrations produced by airflow and converts the signals to a dynamic image of the lung. The vibration energy throughout the breathing cycle can be quantified for any lung region, by integrating the energy over 40 acoustic sensors .Objective: To evaluate the correlation between regional vibration (VRI) energy and regional lung function as assessed by radionuclide V/Q scan.