In medicine<unk>  (VRI), is a novelty computer-based technology that takes the concept of the stethoscope to a more progressive level. Since the invention of the stethoscope by René-Théophile-Hyacinthe Laennec France in 1816, physicians have been utilizing<unk><unk> s to diagnose various chest conditions. Today auscultation provides physicians with extensive information on the examination of the patient. The skills of the examiner however, vary, as seen in a clinical study that was conducted on the diagnosis of pneumonia in 2004. The technology is based on the physiologic<unk>  generated during the breathing process when flow of air distributing through the bronchial tree creates<unk>  of the bronchial tree walls and the<unk>  parenchyma itself. Emitted<unk>  energy propagating through the<unk>  parenchyma and the chest wall reaches the body surface where is captured and recorded by a set of acoustic sensors. The sensors are positioned over the<unk>  areas on the back that allows for the simultaneous reception of these signals from both<unk> s. These signals are then transformed by a complex algorithm to display the spatial changes in energy intensity during the breathing cycle. The intensity changes follow changes of airflow through the breathing cycle - i.e.: flow increases and decreases during inspiration and expiration. The VRI technology represents these changes as a grey scale-based dynamic image. The darker the higher the<unk>  intensity and the lighter the lower the<unk>  intensity is.
Imaging Lung Sound Behavior with Vibration Response Imaging
Transcutaneous oxygen measurement
Hyperoxia test
Arterial blood gas test
Narrow-band imaging
Blood gas test
Computer-aided auscultation
Respiratory pressure meter