The effect of calibration and detector temperature on the reconstructed cone beam computed tomography image quality

A study for the workflow of the iCAT Classic equipment

Mark Plachtovics, Janos Goczan, K. Nagy

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Objective The image quality of the reconstructed dental cone beam computed tomography (CBCT) acquisition is strongly dependent on the characteristics of the applied detector. Some flat panel detector (FPD) types require a warming-up period (WUP) to achieve a steady-state temperature; and some of them, those that have a cesium iodide detector, may require a calibration process (CP) after each WUP. Study Design Quality-assurance phantom was used for the evaluation of image quality, including spatial accuracy and density response with and without WUP and CP using iCAT Classic equipment. Results The correlation between the measured gray values and the multidetector computed tomography (MDCT) values deviated slightly from linearity (defined by the 45-degree line). There was no detectable difference in the spatial accuracy of the four different scanning modes. Conclusions Although the WUP is important to reach the required steady-state temperature, the CP has a greater effect on the image quality.

Original languageEnglish
Pages (from-to)473-480
Number of pages8
JournalOral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
Volume119
Issue number4
DOIs
Publication statusPublished - Apr 1 2015

Fingerprint

Cone-Beam Computed Tomography
Workflow
Calibration
Equipment and Supplies
Temperature
Multidetector Computed Tomography
Tooth

ASJC Scopus subject areas

  • Surgery
  • Oral Surgery
  • Pathology and Forensic Medicine
  • Radiology Nuclear Medicine and imaging
  • Dentistry (miscellaneous)

Cite this

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N2 - Objective The image quality of the reconstructed dental cone beam computed tomography (CBCT) acquisition is strongly dependent on the characteristics of the applied detector. Some flat panel detector (FPD) types require a warming-up period (WUP) to achieve a steady-state temperature; and some of them, those that have a cesium iodide detector, may require a calibration process (CP) after each WUP. Study Design Quality-assurance phantom was used for the evaluation of image quality, including spatial accuracy and density response with and without WUP and CP using iCAT Classic equipment. Results The correlation between the measured gray values and the multidetector computed tomography (MDCT) values deviated slightly from linearity (defined by the 45-degree line). There was no detectable difference in the spatial accuracy of the four different scanning modes. Conclusions Although the WUP is important to reach the required steady-state temperature, the CP has a greater effect on the image quality.

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