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: 2017-08-07
Authors : M.C Grados Luyando; B. De Celis Alonso; E. Moreno Barbosa; M.I. Martínez Hernández; J.M. Hernández lópez; G. Tejeda Muñoz;
Page : 79-89
Keywords : Timepix; Computed Tomography; Dose;
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.
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