Imaging Indoor Tracer-Gas Concentrations with Computed Tomography: Experimental Results with a Remote Sensing FTIR System

This work demonstrates for the first time the feasibility of computed tomography (CT) reconstructions of pollutant concentrations in a real room setting. A remote sensing Fourier transform infrared spectrometer was mounted on a moving base in a controlled ventilation chamber. A passive tracer was re...

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Bibliographic Details
Published in:American Industrial Hygiene Association journal 1994-05, Vol.55 (5), p.395-402
Main Authors: Yost, M.G., Gadgil, A.J., Drescher, A.C., Zhou, Y., Simonds, M.A., Levine, S.P., Nazaroff, W.W., Saisan, P.A.
Format: Article
Language:English
Subjects:
Air Pollutants, Occupational - analysis
Air pollution
Air Pollution, Indoor - analysis
Applied sciences
Atmospheric pollution
Boundary conditions
Calibration
Environmental Exposure
Exact sciences and technology
Feasibility Studies
Fourier Analysis
Fourier transforms
Gases
Gases - analysis
Image Processing, Computer-Assisted
Indoor air quality
Indoor pollution and occupational exposure
Nitrogen
Personal computers
Pollutants
Pollution
Polyethylene
Remote sensing
Sensors
Simulation
Spectrophotometry, Infrared
Test methods
Tomography
Tomography, X-Ray Computed
Ventilation
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Summary:This work demonstrates for the first time the feasibility of computed tomography (CT) reconstructions of pollutant concentrations in a real room setting. A remote sensing Fourier transform infrared spectrometer was mounted on a moving base in a controlled ventilation chamber. A passive tracer was released from a point source into the room under constant ventilation conditions. A series of experiments gathered multiple path-averaged measurements in a two-dimensional plane for CT reconstruction. Simultaneous readings were gathered with a multiple-point sampling array for later comparison to the CT reconstructed concentrations. Good qualitative agreement between the reconstruction and point sample data was obtained. Limitations encountered due to the temporal resolution, size, and geometry of the experimental apparatus are clearly surmountable with better instrumentation.
ISSN:0002-8894
2163-369X
DOI:10.1080/15428119491018835