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Tomography - detection and or measurement

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While Topography is defined as being concerned with features of a surface, Tomography is concerned with the features of embedded objects.

Many people will have heard of a PET or CAT scan as non-invasive medical procedures which create images of various body parts.

PET Scans (Positron Emission Tomography) is where typically, a small dose of radioactive material is added to the blood stream and after circulating, its presence and concentrations are detected and imaged from outside the body.

Tomography can be carried out on a variety of subjects using a variety of detection techniques including:

X-Ray Computed Axial Tomography (CAT scan)
Positron Emission Tomography (PET),
Acoustic Tomography,
Ultrasound Tomography,
Seismic Tomography
Optical Tomography,
Electron Microscopy Tomography (EMT)
Electrical Capacitance Tomography (ECT)
Electrical Impedance Tomography (EIT)

Sensatech are concerned primarily with ECT and EIT using knowledge of capacitive and electric field sensing arrays developed from work in other areas. Sensatech sensors have improved contact impedance characteristics and thus do not require as much care in fitting of the electrodes.

Using electrical capacitive tomography Sensatech is working on development projects to establish the feasibility of detecting landmines embedded in the soil, Sensatech is also working on non contact cardiography which may develop into research into body potential mapping, itself a form of tomography though of electrical potential rather than physical characteristics.

See also:
3d shapes - detection and or measurement of
Invasive, non-contact 3d mapping

Pages in the Applications section:
3d shapes - detection and or measurement of
Collision avoidance - Proximity measurement
Electro-cardiography - Non contact
Environment - Hazardous
Environment - High temperature
Human anatomy - Foot gauge
Human anatomy - Light switch
Invasive, non-contact 3d mapping
Landmine detection
Liquid level detection
Micro machines
Moisture measurement
Powder or granule level detection
Proximity detection - Non contact
Proximity measurement - Analogue
Reversing Sensor
Robotic control and protection
Small targets at high speeds
Solder Wave height
Weighing cell

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