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Obstacles in spatial evaluation of CBCT-reformatted panoramic imaging

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Obstacles in spatial evaluation of CBCT-reformatted panoramic imaging. / Wikner, Johannes; Friedrich, Reinhard E; Rashad, Ashkan; Schulze, Dirk; Hanken, Henning; Heiland, Max; Gröbe, Alexander; Riecke, Björn.

In: DENTOMAXILLOFAC RAD, Vol. 45, No. 4, 2016, p. 20150436.

Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review

Harvard

Wikner, J, Friedrich, RE, Rashad, A, Schulze, D, Hanken, H, Heiland, M, Gröbe, A & Riecke, B 2016, 'Obstacles in spatial evaluation of CBCT-reformatted panoramic imaging', DENTOMAXILLOFAC RAD, vol. 45, no. 4, pp. 20150436. https://doi.org/10.1259/dmfr.20150436

APA

Wikner, J., Friedrich, R. E., Rashad, A., Schulze, D., Hanken, H., Heiland, M., Gröbe, A., & Riecke, B. (2016). Obstacles in spatial evaluation of CBCT-reformatted panoramic imaging. DENTOMAXILLOFAC RAD, 45(4), 20150436. https://doi.org/10.1259/dmfr.20150436

Vancouver

Wikner J, Friedrich RE, Rashad A, Schulze D, Hanken H, Heiland M et al. Obstacles in spatial evaluation of CBCT-reformatted panoramic imaging. DENTOMAXILLOFAC RAD. 2016;45(4):20150436. https://doi.org/10.1259/dmfr.20150436

Bibtex

@article{cd7df17e273346f1b2e311e12def6d28,
title = "Obstacles in spatial evaluation of CBCT-reformatted panoramic imaging",
abstract = "OBJECTIVES: Conventional panoramic radiography (cPR) underlines procedure-related limitations in the display of objects. CBCT is presumed to overcome these constraints. To virtualize a cPR view, reformatted panoramic images (rPIs) can be generated. This study evaluated the rPI with regard to its susceptibility to sterical object deposition in comparison with cPR.METHODS: A specially developed implant model with dental implants each of 4.0-mm diameter and 11.0-mm length was depositioned by shift, rotation and tilt of 5.00 mm (±0.01 mm) of horizontal shift and 5.0° (±0.167°), respectively, on a highly precise goniometer rotation table, and cPRs and rPIs were generated. Automated evaluation of the cPRs was carried out using a specially developed software. rPIs were processed and analyzed by a semi-automated image analysis.RESULTS: Object deposition lead to distortive effects in the rPI analogue to cPR, but they appear in display only. Objects illustrated in the rPI were dimensionally correct, but sterical relations are elusive. Results are obtained for the horizontal shift, declination and reclination, lateral tilt and rotation.CONCLUSIONS: Distortions within the rPI represent the illustration of the hyperbolic-shaped layer out of the three-dimensional data set. With this study, we demonstrated these procedure-related inherent but practically underestimated consequences. Effects of sterical object malpositioning must be compensated by the observer by adequate virtual adjustment of the processed layer. Accurate virtual adjustment leads to vertical dimensions. Sterical relations, e.g. angulation of two objects, are irretraceable unless precisely referenced.",
keywords = "Cone-Beam Computed Tomography, Dental Implants, Humans, Image Processing, Computer-Assisted, Imaging, Three-Dimensional, Radiographic Image Interpretation, Computer-Assisted, Radiography, Panoramic, Reproducibility of Results, Rotation, User-Computer Interface",
author = "Johannes Wikner and Friedrich, {Reinhard E} and Ashkan Rashad and Dirk Schulze and Henning Hanken and Max Heiland and Alexander Gr{\"o}be and Bj{\"o}rn Riecke",
year = "2016",
doi = "10.1259/dmfr.20150436",
language = "English",
volume = "45",
pages = "20150436",
journal = "DENTOMAXILLOFAC RAD",
issn = "0250-832X",
publisher = "The British Institute of Radiology",
number = "4",

}

RIS

TY - JOUR

T1 - Obstacles in spatial evaluation of CBCT-reformatted panoramic imaging

AU - Wikner, Johannes

AU - Friedrich, Reinhard E

AU - Rashad, Ashkan

AU - Schulze, Dirk

AU - Hanken, Henning

AU - Heiland, Max

AU - Gröbe, Alexander

AU - Riecke, Björn

PY - 2016

Y1 - 2016

N2 - OBJECTIVES: Conventional panoramic radiography (cPR) underlines procedure-related limitations in the display of objects. CBCT is presumed to overcome these constraints. To virtualize a cPR view, reformatted panoramic images (rPIs) can be generated. This study evaluated the rPI with regard to its susceptibility to sterical object deposition in comparison with cPR.METHODS: A specially developed implant model with dental implants each of 4.0-mm diameter and 11.0-mm length was depositioned by shift, rotation and tilt of 5.00 mm (±0.01 mm) of horizontal shift and 5.0° (±0.167°), respectively, on a highly precise goniometer rotation table, and cPRs and rPIs were generated. Automated evaluation of the cPRs was carried out using a specially developed software. rPIs were processed and analyzed by a semi-automated image analysis.RESULTS: Object deposition lead to distortive effects in the rPI analogue to cPR, but they appear in display only. Objects illustrated in the rPI were dimensionally correct, but sterical relations are elusive. Results are obtained for the horizontal shift, declination and reclination, lateral tilt and rotation.CONCLUSIONS: Distortions within the rPI represent the illustration of the hyperbolic-shaped layer out of the three-dimensional data set. With this study, we demonstrated these procedure-related inherent but practically underestimated consequences. Effects of sterical object malpositioning must be compensated by the observer by adequate virtual adjustment of the processed layer. Accurate virtual adjustment leads to vertical dimensions. Sterical relations, e.g. angulation of two objects, are irretraceable unless precisely referenced.

AB - OBJECTIVES: Conventional panoramic radiography (cPR) underlines procedure-related limitations in the display of objects. CBCT is presumed to overcome these constraints. To virtualize a cPR view, reformatted panoramic images (rPIs) can be generated. This study evaluated the rPI with regard to its susceptibility to sterical object deposition in comparison with cPR.METHODS: A specially developed implant model with dental implants each of 4.0-mm diameter and 11.0-mm length was depositioned by shift, rotation and tilt of 5.00 mm (±0.01 mm) of horizontal shift and 5.0° (±0.167°), respectively, on a highly precise goniometer rotation table, and cPRs and rPIs were generated. Automated evaluation of the cPRs was carried out using a specially developed software. rPIs were processed and analyzed by a semi-automated image analysis.RESULTS: Object deposition lead to distortive effects in the rPI analogue to cPR, but they appear in display only. Objects illustrated in the rPI were dimensionally correct, but sterical relations are elusive. Results are obtained for the horizontal shift, declination and reclination, lateral tilt and rotation.CONCLUSIONS: Distortions within the rPI represent the illustration of the hyperbolic-shaped layer out of the three-dimensional data set. With this study, we demonstrated these procedure-related inherent but practically underestimated consequences. Effects of sterical object malpositioning must be compensated by the observer by adequate virtual adjustment of the processed layer. Accurate virtual adjustment leads to vertical dimensions. Sterical relations, e.g. angulation of two objects, are irretraceable unless precisely referenced.

KW - Cone-Beam Computed Tomography

KW - Dental Implants

KW - Humans

KW - Image Processing, Computer-Assisted

KW - Imaging, Three-Dimensional

KW - Radiographic Image Interpretation, Computer-Assisted

KW - Radiography, Panoramic

KW - Reproducibility of Results

KW - Rotation

KW - User-Computer Interface

U2 - 10.1259/dmfr.20150436

DO - 10.1259/dmfr.20150436

M3 - SCORING: Journal article

C2 - 26959644

VL - 45

SP - 20150436

JO - DENTOMAXILLOFAC RAD

JF - DENTOMAXILLOFAC RAD

SN - 0250-832X

IS - 4

ER -