Structured light plethysmography
Structured Light Plethysmography (SLP) technology is a noninvasive method for collecting accurate representations of chest and abdominal wall movement.
In conjunction with the Cambridge Veterinary School, proof of concept studies have indicated that the device is sensitive enough to noninvasively pick up respiratory movements in domestic animals (cats and dogs).
A totally “non-invasive” technique using structured light to measure pulmonary function was developed as long ago as the mid-1980s by a London group at the Royal Brompton Hospital working in close association with IBM (1-4).
At that time structured light pattern was shone on to the anterior chest and abdominal wall surfaces, and movie camera film footage was taken and sent to IBM for processing.
Independently the Royal Brompton group of the 1980s, a Cambridge (UK) consortium of clinicians and engineers developed a system in 2009 that has revisited structure light pattern as a noninvasive method for collecting accurate representations of chest and abdominal wall movement.
The projector shines a grid of black and white squares from superior iliac crest to clavicle; the subject can wear a plain t-shirt of any colour.
Juliet Usher-Smith, Richard Wareham, J Lasenby, J Cameron, P Bridge, R Iles RCPCH York 2009 Arch Dis Child 2009;94(Suppl I):A38–A40 2.
Structured light plethysmography (SLP) compared to spirometry: R. Wareham, J. Lasenby, J. Cameron, P. D. Bridge, R. Iles (Cambridge, United Kingdom) E-communication : 350 ERS 2009 3.
Peter Bridge1, Richard Iles1, Rich Wareham2, Jonathan Cameron2, Juliet Usher-Smith1, Ward Hills3, Gareth Roberts3, Willem de Boer2, Joan Lasenby E-communication : 1858 ERS 2009 4.
Comparison of Forced Expiratory Volumes Measured with Structured Light Plethysmography (SLP) and Spirometry Eugene Lau, Douglas Brand, Peter Bridge, Richard Iles, Rich Wareham, Jonathan Cameron, Juliet Usher-Smith, Ward Hills, Gareth Roberts, Willem de Boer, Joan Lasenby.
Comparison of Tidal Breathing with Structured Light Plethysmography (SLP) and Spirometry Eugene Lau, Douglas Brand, Peter Bridge, Richard Iles, Rich Wareham, Jonathan Cameron, Juliet Usher-Smith, Ward Hills, Gareth Roberts, Willem de Boer, Joan Lasenby.
SLP: A Zero-Contact Non-Invasive Method for Pulmonary Function Testing Richard Iles, Rich Wareham, Jonathan Cameron, Juliet Usher-Smith, Ward Hills, Gareth Roberts, Willem de Boer, Joan Lasenby BMVC 2010 9.
Measurement of lung volumes in real time, using optical plethysmography: Postgraduate Course: WS1 Educational Workshop: Noninvasive assessment of respiratory function in children.
