Probe for rectal and prostate cancers
Background and aim
Conventional imaging to screen for cancer typically uses MRI – a vastly expensive procedure not necessarily available outside main centres, particularly in second and third world countries. We aim to develop a low cost device especially for screening for rectal and prostate cancers, and for monitoring treatment.
Led by expert in the field Professor Bayford, we are developing a new probe using Electrical Impedance Tomography (EIT) – a very low cost imaging system that can be used to detect abnormal tissue such as a tumour.
With EIT, a series of electrodes are placed over the area to be imaged, inducing minute electric currents. The pattern of the currents is then mapped by sophisticated mathematical analysis to reveal any abnormal tissue, such as a tumour.
A portable probe based on this principle has been developed for detection of cervical cancer by Zilico Ltd., a small firm in Sheffield. We are adapting this idea to create a small circular inflatable device consisting of a ring of electrodes with an inbuilt camera; this will fit into the anus to detect any overt or underlying rectal cancer growths.
During development the accuracy of the system will be checked against conventional imaging with MRI. Once developed, the device will be adapted for the detection of prostate cancer.
Professor R. Bayford – Project leader
Dr A. Tizzard – Technical support
Research Associate – Testing device in lab and clinic
Professor A. Demosthenes – Design of electrodes (UCL)
A.N.Other – Design of hardware (UCL)
Mr G Buchanan – Provide patients (Imperial)
Radiologist – Parallel imaging MRI (Imperial normal NHS assessment)
Zilico Ltd. – Technical support