Accuracy of mandibular cross-sectional imaging with tuned-aperture computed tomography (TACT), iteratively reconstructed TACT, and multidirectional, linear, and transverse panoramic tomography

Hui Liang, Donald A. Tyndall, John B. Ludlow, Lisa A. Lang, Martha E. Nunn

Research output: Contribution to journalArticle

11 Scopus citations


Objective. This study was designed to compare 5 modalities with respect to accuracy in mandibular cross-sectional imaging. The modalities tested were tuned-aperture computed tomography (TACT), iteratively reconstructed TACT, multidirectional tomography, linear tomography, and transverse panoramic tomography. Study design. Twenty sites were selected from 3 dry human mandibles, and cross-sectional views were imaged through use of each of the 5 modalities. A quantitative analysis included measurements of 2 linear distances; a qualitative study included image evaluation by 6 observers. A nested mixed analysis of variance model was used to control for mandibles and locations within mandibles for the quantitative analysis; the Cochran-Mantel-Haenszel test was used for the qualitative analysis. Results. There was a significant difference in measurement error for maximum height but not for width. There was also a significant difference in qualitative image evaluation results. Conclusions. Of the 5 modalities tested, the narrow-layer multidirectional tomographic technique produced the greatest diagnostic accuracy and quality in cross-sectional imaging. The transverse panoramic tomographic technique produced the least diagnostic accuracy and quality. Linear tomography, TACT, and iteratively reconstructed TACT were intermediate in accuracy and quality.

Original languageEnglish (US)
Pages (from-to)594-602
Number of pages9
JournalOral surgery, oral medicine, oral pathology, oral radiology, and endodontics
Issue number5
StatePublished - May 2001


All Science Journal Classification (ASJC) codes

  • Surgery
  • Oral Surgery
  • Otorhinolaryngology
  • Dentistry(all)

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