X-Ray IO Monitor Device for Primary Intensity Measurement in Computed Tomography (CT) Scanner

  • Rafay Mehmood Siddiqui
  • Inam Ul Ahad
  • Samreen Amir
  • Bassim Aklan
  • Tahir Uddin
Part of the IFMBE Proceedings book series (IFMBE, volume 49)

Abstract

For a Computed Tomography (CT) Scanner used as a Non Destructive Testing (NDT) machine, 3D volume is reconstructed mathematically using un-attenuated (primary IO) and attenuated (secondary I) intensities. Primary intensity (IO) values are acquired from area of the imaging detector that is not covered by the object being tested. This procedure is prone to errors due to detector artifacts, nonlinear detector behavior, and scattered radiations detection as primary intensities, etc. This study is an attempt to make this procedure efficient and unimpeachable in which an X-ray IO monitor device is designed and validated that permit precise detection of the primary intensity to obtain better normalization and consequently higher quality image. Using TSL235 photodiode from Texas Instrument the X-ray intensity measured in current is directly converted into frequency which provides high resolution and precise X-ray detection. The device is designed to be easily integrate with an existing CT machine and could be interfaced and read out with a standard Personal Computer (PC) without any need of additional hardware. Furthermore, this device could also be used for other applications, like direct measurement of scattered radiations to apply correction to data set of scan obtained.

Keywords

X-Ray IO Monitor Non Destructive Testing Un-attenuated Intensity Detection 

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Copyright information

© IFMBE 2013

Authors and Affiliations

  • Rafay Mehmood Siddiqui
    • 1
  • Inam Ul Ahad
    • 1
  • Samreen Amir
    • 2
  • Bassim Aklan
    • 3
  • Tahir Uddin
    • 4
  1. 1.Department of Biomedical EngineeringSir Syed University of Engineering and TechnologyKarachiPakistan
  2. 2.Institute of Information and CommunicationMehran University of Engineering and TechnologyJamshoroPakistan
  3. 3.Institute of Medical PhysicsUniversity of Erlangen-NurembergNurembergGermany
  4. 4.University of DebrecenDebrecenHungary

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