<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The purpose of this study was to develop an automatic method for validating the computed tomography gantry tilt. A head polymethyl methacrylate phantom with a diameter of 16 cm was used. Gantry tilt angles were measured both manually and automatically. Manual measurements were performed by measuring the length of the anteroposterior and lateral diameters from acquired images using electronic calipers. Automatic measurements consisted of a number of steps: phantom segmentation, determination of the center of the phantom, measurement of the anteroposterior and lateral diameters, and computation of the gantry tilt angle. The method was implemented on the gantry angles from 0° to 15°. The proposed method of measuring gantry angles produced accurate gantry tilt angles. The differences with the angles displayed on the gantry were less than 1°. The results of the automatic method were the same as those of the manual method (R<sup>2</sup> > 0.98).</p>
</abstract>

The purpose of this study was to develop an automatic method for validating the computed tomography gantry tilt. A head polymethyl methacrylate phantom with a diameter of 16 cm was used. Gantry tilt angles were measured both manually and automatically. Manual measurements were performed by measuring the length of the anteroposterior and lateral diameters from acquired images using electronic calipers. Automatic measurements consisted of a number of steps: phantom segmentation, determination of the center of the phantom, measurement of the anteroposterior and lateral diameters, and computation of the gantry tilt angle. The method was implemented on the gantry angles from 0° to 15°. The proposed method of measuring gantry angles produced accurate gantry tilt angles. The differences with the angles displayed on the gantry were less than 1°. The results of the automatic method were the same as those of the manual method (R2 > 0.98).

Automatic validation of the gantry tilt in a computed tomography scanner using a head polymethyl methacrylate phantom

Department of Physics, Faculty of Sciences and Mathematics

Department of Applied Physics and Medical Imaging

California State University Channel Islands

Polish Journal of Medical Physics and Engineering

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

The purpose of this study was to develop an automatic method for validating the computed tomography gantry tilt. A head polymethyl methacrylate phantom with a...

Automatic validation of the gantry tilt in a computed tomography scanner using a head polymethyl methacrylate phantom

Published Online: Mar 18, 2021

Page range: 57 - 62

DOI: https://doi.org/10.2478/pjmpe-2021-0008

Keywords
computed tomography, gantry tilt, polymethyl methacrylate phantom, automated method, quality control

© 2021 Rakhma Noviliawati et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Automatic validation of the gantry tilt in a computed tomography scanner using a head polymethyl methacrylate phantom

Published Online: Mar 18, 2021

Page range: 57 - 62

DOI: https://doi.org/10.2478/pjmpe-2021-0008

Keywordscomputed tomography, gantry tilt, polymethyl methacrylate phantom, automated method, quality control

© 2021 Rakhma Noviliawati et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
computed tomography, gantry tilt, polymethyl methacrylate phantom, automated method, quality control