About Dr Alistair McEwan
Alistair's research investigates medical instrumentation, biomedical devices and integrated circuit design.
Most recently he developed a portable imaging device based on Electrical Impedance Tomography Spectroscopy (EITS). The resulting system is currently being used in clinical trials of stroke and epilepsy monitoring in three London hospitals. While developing this system he published an extensive review of the errors in EITS systems and developed a code division multiplexing (CDM) EITS method for simultaneous measurements with increased acquisition speed, number of electrodes and frequencies, leading to improved images and a wider range of applications. This has been patented and attracted commercial attention of Philips Research Laboratories (Germany) and GE Research (USA). He has made significant contributions in the fields of low power circuit design and neuromorphic engineering with an integrated circuit which mimics the behaviour of the inner hair cell of the ear. He has also developed, with funding from Analog Devices (UK), an integrated circuit which provides low power, low cost frequency synthesis for communications such as Bluetooth and which enables the integration of large arrays of these synthesisers for a lab-on-a-chip or bio-impedance measurements. The design is currently the most efficient direct digital frequency synthesiser available.