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Characterization Of Structures Of Equivalent Tissue With a Pixel Detector

Journal: Journal of Nuclear Physics, Material Sciences, Radiation and Applications (Vol.5, No. 1)

Publication Date:

Authors : ; ; ; ; ; ;

Page : 79-89

Keywords : Timepix; Computed Tomography; Dose;

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Abstract

Research using hybrid pixel detectors in medical physics is on the rise. Timepix detectors have arrays of 256 × 256 pixels with a resolution of 55 µm. Here, and by using Timepix counts instead of Hounsfield units, we present a calibration curve of a Timepix detector analog to those used for CT calibration. Experimentation consisted of the characterization of electron density in 10 different kinds of tissue equivalent samples from a CIRS 062M phantom (lung, 3 kinds of bones, fat, breast, muscle, water and air). Radiation of the detector was performed using an orthodontic X-ray machine at 70 KeV and .06 second of tube current with a purpose-built aluminum collimator. Data acquisition was performed at 1 frame per second and taking 3 frames per phantom. We were able to find a curve whose behavior was similar to others already published. This will lead to the verification of the usage of Timepix for identification of different tissues in an organ.

Last modified: 2019-12-07 18:30:28