EVALUATION OF THE EDGE PROFILE SHIFTING BASED ON STATISTICAL APPROACH TO IMPROVE THE EDGE-BASED MTF MEASUREMENT

Authors

  • Riska Amilia Department of Physics, Faculty of Sciences and Mathematics, Diponegoro University, Jl. Prof. Soedarto SH, Tembalang, Semarang 50275, Central Java, Indonesia
  • Choirul Anam Department of Physics, Faculty of Sciences and Mathematics, Diponegoro University, Jl. Prof. Soedarto SH, Tembalang, Semarang 50275, Central Java, Indonesia
  • Karrar Mahdi Badi Department of Medical Physics, College of Science, Al-Qadisiyah University, Al-Qadisiyah, Iraq
  • Ariij Naufal Department of Physics, Faculty of Sciences and Mathematics, Diponegoro University, Jl. Prof. Soedarto SH, Tembalang, Semarang 50275, Central Java, Indonesia
  • Geoff Dougherty Applied Physics and Medical Imaging, California State University Channel Islands, Camarillo, CA 93012, USA

DOI:

https://doi.org/10.11113/jurnalteknologi.v87.22385

Keywords:

Computed Tomography, modulation transfer function, slanted edge method, spatial resolution

Abstract

This study aims to evaluate the accuracy of edge profile shifting based on a statistical approach to improve the edge-based modulation transfer function (MTF) measurement using the slanted-edge phantom. A slanted-edge phantom was computationally developed with two materials, a water and a material of 120 HU. The spatial resolution of the phantom was varied from 0.3 to 1.25 cycle/mm and the slanted angle was varied from 0° to 10°. The statistical shifting was performed by shifting the treated ESF backward and forward by up to 10 pixels (increment of 1 pixel). At each shift, the similarity between the shifted and reference ESFs was calculated using mean squared error (MSE). The statistical edge-MTF was compared against the traditional edge-MTF and the point-MTF as the gold standard. The statistical edge-MTF approach had similar results against the point-MTF compared to the traditional edge-MTF. At a slanted angle less than 8°, the statistical edge-MTF was comparable to the point-MTF with a difference about 2%. For slanted angles more than 8°, the difference was around 5%. By contrast, the non-statistical edge-MTF approach produced larger differences as the slanted angle increased. The statistical approach for measuring edge-MTF is more robust compared to the traditional edge-MTF approach.

 

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Published

2025-03-12

Issue

Section

Science and Engineering

How to Cite

EVALUATION OF THE EDGE PROFILE SHIFTING BASED ON STATISTICAL APPROACH TO IMPROVE THE EDGE-BASED MTF MEASUREMENT. (2025). Jurnal Teknologi (Sciences & Engineering), 87(3). https://doi.org/10.11113/jurnalteknologi.v87.22385