DRDO has successfully developed a
gamma ray transmission-based multi-detector computed tomography (CT) system.
The system is based on Ir-192 radio-isotope source and uses four discrete
detectors thereby reducing the data acquisition time by one-fourth as
compared to the single-detector first generation CT systems. The technology
is unique and first of its kind in the country.
The multi-detector CT system comprises a computer-controlled mechanical
manipulator that can scan objects weighing up to 60 kg and maximum diameter
of 500 mm. It also comprises four NaI(Tl) raDIATion detectors with
associated computer-controlled electronics for simultaneous data
acquisition, and CT reconstruction software implemented for the unique
geometry. The system is capable of achieving sensitivity of the order of one
per cent in reconstructed CT images.
The system offers tremendous potential for non-destructive testing and
evaluation as the solution is cost-effective, reduces the scanning time and
offers increased flexibility to accommodate wide spectrum of industrial
objects. The simplicity in operation and control is also an added advantage.
It is providing vital information for ongoing DRDO programmes including LCA,
Samyukta and IGMDP.