CT Scanning

Recently, airports have adopted more advanced X-ray scanning systems to check passenger baggage for explosives, called computed tomography scans (also known as CT, CT scan, CAT, or computerised axial tomography).

It uses X-rays to produce precise cross-sectional images of baggage items. In a CT scanner the bag is placed in a cylindrical device. Inside the cylinder is an x-ray source that is mechanically rotated entirely around the bag.

Also, the cylinder is lined with detectors that measure the X-rays that pass through the scanned object at all angles. By collating all the information that is gathered during a full revolution of the X-ray source, a computer can form a three-dimensional model of the irradiated volume of the object and assemble a series of cross-sectional images into a single detailed image.

CT X-ray technology provides operators with much more information than conventional X-ray systems and can even go so far as to flag suspected explosive materials.

CT scanning is computation-intensive and requires rotation of the X-ray source around the scanned object, making this technique slower and much more expensive than transmission-type imaging. Since it is not practical to put all bags through the CT scanner at most airports, only suspicious” bags (e.g., those belonging to a passenger who exhibits suspicious signs) are passed through the CT scanner.

Technological improvements in CT scanning are likely to make routine CT scanning of

Find out more about SIMFOX COMPUTED TOMOGRAPHY, the simulator that is used to train and test the X-ray detection skills of security screeners in Airports!