Details of Grant 

EPSRC Reference:	GR/R59519/01
Title:	Active aperture synthesis for medical and mm-wave imaging
Principal Investigator:	Harvey, Professor A
Other Investigators:	Greenaway, Professor A Jones, Professor JDC
Researcher Co-Investigators:
Project Partners:	QinetiQ
Department:	Sch of Engineering and Physical Science
Organisation:	Heriot-Watt University
Scheme:	Fast Stream
Starts:	01 December 2001	Ends:	30 November 2004	Value (£):	59,259
EPSRC Research Topic Classifications:	Biological & Medicinal Chem.
EPSRC Industrial Sector Classifications:	Aerospace, Defence and Marine Healthcare
Related Grants:
Panel History:
Summary on Grant Application Form
The aim of this research programme is to develop new approaches to active aperture synthetic imaging to enable the advantages of active aperture synthesis (high angular resolution, imaging from two-dimensional surfaces, simultaneous imaging in three dimensions) but with a major reduction in the magnitude of the usual disadvantages (requirements for many apertures, high complexity, problematic calibration). Experiments and will be conducted Ito assess the feasibility of the new techniques for (a) mm-wave imaging, for use as a foul-weather flying aid, for example, (b) imaging of the retina with a resolution of up to two times greater than can be achieved with diffraction-limited imaging and (c) two-dimensional imaging through a turbid medium with a view to enabling real-time imaging from scalpel blades during surgery. Two novel approaches will be researched: (a) band-pass Fourier telescopy in which high spatial frequencies in the scene are heterodyned with high-frequency fringe patterns to lower frequencies below the high-frequency cut-off of the optical aperture of a conventional imager and (b) sparse array active aperture synthesis in which a localised crosscarelation function is formed from each aperture pair to enable the source intensity distributions in z and x or y directions to be measured with a reduced number of antennas. The principle underlying the two approaches is to make many measurements for each aperture pair of the synthetic aperture array, rather than the single complex measurement conventionally obtained. This offers greatly increased efficiency with which apertures and detectors are used and promises to simplify calibration.
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Organisation Website:	http://www.hw.ac.uk