Development and Validation of an X-ray Imaging Detector for Digital Radiography at Low Resolution

 

• Abdiel Ramírez Reyes
  Department of Physics and Mathematics, Autonomous University of Ciudad Juárez, Av. Del Charro 450 Nte. Col. Romero CP Party 32310, Cd. Juárez, Chihuahua, Mexico
• Gerardo Herrera Corral
  Department of Physics of CINVESTAV-IPN, AP 14-740, Avenida Instituto Politécnico Nacional 2508, Col. San Pedro Zacatenco, Gustavo A. Madero, Mexico City, CP-07360, Mexico
• Elsa Ordoñez Casanova
  Department of Industrial Engineering and Manufacturing, Autonomous University of Ciudad Juárez, Av. Del Charro 450 Nte. Cabbage. Romero Party CP-32310, Cd. Juarez, Chihuahua, Mexico
• Héctor Alejandro Trejo Mandujano
  Department of Physics and Mathematics, Autonomous University of Ciudad Juárez, Av. Del Charro 450 Nte. Col. Romero CP Party 32310, Cd. Juárez, Chihuahua, Mexico
• Uzziel Caldiño Herrera
  Department of Physics and Mathematics, Autonomous University of Ciudad Juárez, Av. Del Charro 450 Nte. Col. Romero CP Party 32310, Cd. Juárez, Chihuahua, Mexico

DOI: https://doi.org/10.15415/jnp.2020.72023

Keywords: X-ray detector, Digital radiography, Scintillator, CCD image sensor, Spatial resolution

Abstract

Digital X-ray detectors are required in different sciences and applications, however many high quality devices are expensive although high-resolution images are not always required. We present an easy way to build a detector capable of forming X-ray digital images and video with a very large area (18×18 cm²). The detector is formed by three main components: scintillator, optics lenses and CCD sensor. Basically, the device converts the X-rays into visible light which is then collected by the CCD sensor. The scintillator is Gadox type, from Carestream®, 18×18 cm², regular type, lambda 547 nm. The optics lenses are generic, with manual focus and widely visual field. The CCD sensor has a size of 1/3″, 752 × 582 pixels, monochrome, 20 FPS, 12 bits ADC and pixel size of 3.8 μm. With the built detector and an X-ray source, we formed an X-ray imaging detection system to generate digital radiographs of biological or inert objects-examples are given-, as well as real-time X-ray video. Additionally, the spatial resolution limit was measured in terms of Modulation Transfer Function by the method of opaque edge from a lead sheet with a result of 1.1 Lp/mm. Finally using a filter, the focal spot of the X-ray source is measured, resulting in a diameter of 0.9 mm (FWHM).

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Issue

Vol 7 No 2 (2020): Special Issue

  

How to Cite

Abdiel Ramírez Reyes; Gerardo Herrera Corral; Elsa Ordoñez Casanova; Héctor Alejandro Trejo Mandujano; Uzziel Caldiño Herrera. Development and Validation of an X-Ray Imaging Detector for Digital Radiography at Low Resolution. J. Nucl. Phy. Mat. Sci. Rad. A. 2020, 7, 181-187.