Automatic correction of dental artifacts in PET/MRI

Research output: Contribution to journalJournal articlepeer-review

Standard

Automatic correction of dental artifacts in PET/MRI. / Ladefoged, Claes N.; Andersen, Flemming L.; Keller, Sune; Beyer, Thomas; Law, Ian; Højgaard, Liselotte; Darkner, Sune; Lauze, Francois Bernard.

In: SPIE Journal of Medical Imaging, Vol. 2, No. 2, 024009, 2015.

Research output: Contribution to journalJournal articlepeer-review

Harvard

Ladefoged, CN, Andersen, FL, Keller, S, Beyer, T, Law, I, Højgaard, L, Darkner, S & Lauze, FB 2015, 'Automatic correction of dental artifacts in PET/MRI', SPIE Journal of Medical Imaging, vol. 2, no. 2, 024009. https://doi.org/10.1117/1.JMI.2.2.024009

APA

Ladefoged, C. N., Andersen, F. L., Keller, S., Beyer, T., Law, I., Højgaard, L., Darkner, S., & Lauze, F. B. (2015). Automatic correction of dental artifacts in PET/MRI. SPIE Journal of Medical Imaging, 2(2), [024009]. https://doi.org/10.1117/1.JMI.2.2.024009

Vancouver

Ladefoged CN, Andersen FL, Keller S, Beyer T, Law I, Højgaard L et al. Automatic correction of dental artifacts in PET/MRI. SPIE Journal of Medical Imaging. 2015;2(2). 024009. https://doi.org/10.1117/1.JMI.2.2.024009

Author

Ladefoged, Claes N. ; Andersen, Flemming L. ; Keller, Sune ; Beyer, Thomas ; Law, Ian ; Højgaard, Liselotte ; Darkner, Sune ; Lauze, Francois Bernard. / Automatic correction of dental artifacts in PET/MRI. In: SPIE Journal of Medical Imaging. 2015 ; Vol. 2, No. 2.

Bibtex

@article{eb7459fd080d4729a671c8fe54882530,
title = "Automatic correction of dental artifacts in PET/MRI",
abstract = "A challenge when using current magnetic resonance (MR)-based attenuation correction in positron emission tomography/MR imaging (PET/MRI) is that the MRIs can have a signal void around the dental fillings that is segmented as artificial air-regions in the attenuation map. For artifacts connected to the background, we propose an extension to an existing active contour algorithm to delineate the outer contour using the non-attenuation corrected PET image and the original attenuation map. We propose a combination of two different methods for differentiating the artifacts within the body from the anatomical air-regions by first using a template of artifact regions, and second, representing the artifact regions with a combination of active shape models and k-nearest-neighbors. The accuracy of the combined method has been evaluated using 25 18 F-fluorodeoxyglucose PET/MR patients. Results showed that the approach was able to correct an average of 97+/- 3% of the artifact areas.",
author = "Ladefoged, {Claes N.} and Andersen, {Flemming L.} and Sune Keller and Thomas Beyer and Ian Law and Liselotte H{\o}jgaard and Sune Darkner and Lauze, {Francois Bernard}",
year = "2015",
doi = "10.1117/1.JMI.2.2.024009",
language = "English",
volume = "2",
journal = "Journal of Medical Imaging",
issn = "2329-4302",
publisher = "SPIE",
number = "2",

}

RIS

TY - JOUR

T1 - Automatic correction of dental artifacts in PET/MRI

AU - Ladefoged, Claes N.

AU - Andersen, Flemming L.

AU - Keller, Sune

AU - Beyer, Thomas

AU - Law, Ian

AU - Højgaard, Liselotte

AU - Darkner, Sune

AU - Lauze, Francois Bernard

PY - 2015

Y1 - 2015

N2 - A challenge when using current magnetic resonance (MR)-based attenuation correction in positron emission tomography/MR imaging (PET/MRI) is that the MRIs can have a signal void around the dental fillings that is segmented as artificial air-regions in the attenuation map. For artifacts connected to the background, we propose an extension to an existing active contour algorithm to delineate the outer contour using the non-attenuation corrected PET image and the original attenuation map. We propose a combination of two different methods for differentiating the artifacts within the body from the anatomical air-regions by first using a template of artifact regions, and second, representing the artifact regions with a combination of active shape models and k-nearest-neighbors. The accuracy of the combined method has been evaluated using 25 18 F-fluorodeoxyglucose PET/MR patients. Results showed that the approach was able to correct an average of 97+/- 3% of the artifact areas.

AB - A challenge when using current magnetic resonance (MR)-based attenuation correction in positron emission tomography/MR imaging (PET/MRI) is that the MRIs can have a signal void around the dental fillings that is segmented as artificial air-regions in the attenuation map. For artifacts connected to the background, we propose an extension to an existing active contour algorithm to delineate the outer contour using the non-attenuation corrected PET image and the original attenuation map. We propose a combination of two different methods for differentiating the artifacts within the body from the anatomical air-regions by first using a template of artifact regions, and second, representing the artifact regions with a combination of active shape models and k-nearest-neighbors. The accuracy of the combined method has been evaluated using 25 18 F-fluorodeoxyglucose PET/MR patients. Results showed that the approach was able to correct an average of 97+/- 3% of the artifact areas.

U2 - 10.1117/1.JMI.2.2.024009

DO - 10.1117/1.JMI.2.2.024009

M3 - Journal article

C2 - 26158104

VL - 2

JO - Journal of Medical Imaging

JF - Journal of Medical Imaging

SN - 2329-4302

IS - 2

M1 - 024009

ER -

ID: 144735006