Two-Step Metal Artifact Reduction Using 2D-NFFT and Spherically Symmetric Basis Functions

Yulia Levakhina; Baerbel Kratz; Thorsten M. Buzug

doi:10.1109/NSSMIC.2010.5874424

Two-Step Metal Artifact Reduction Using 2D-NFFT and Spherically Symmetric Basis Functions

Yulia Levakhina, Baerbel Kratz, Thorsten M. Buzug

Institute of Medical Engineering

Abstract

In computed tomography metal objects lead to inconsistencies in the acquired data which result in image artifacts after reconstruction. To enhance the image quality and allow for a more accurate diagnosis, a metal artifact reduction is required. Approaches may base on a recomputation of metal influenced values or use an alternative image reconstruction technique, which is less sensitive to inconsistent raw data than the standard filtered backprojection. Here, a two-step algorithm for metal artifact reduction is proposed, which combines a 2D NFFT-based interpolation and an MLEM reconstruction with spherically symmetric basis functions (blobs). Reconstructed images have been evaluated visually and quantitatively. Experiments show that combination of a 2D NFFT-based interpolation and blobs offers an effective strategy for enhanced metal artifacts suppression.

Original language	English
Title of host publication	IEEE Nuclear Science Symposuim & Medical Imaging Conference
Number of pages	3
Publisher	IEEE
Publication date	01.12.2010
Pages	3343-3345
Article number	5874424
ISBN (Print)	978-1-4244-9106-3 , 978-1-4244-9104-9
ISBN (Electronic)	978-1-4244-9105-6
DOIs	https://doi.org/10.1109/NSSMIC.2010.5874424
Publication status	Published - 01.12.2010
Event	2010 IEEE Nuclear Science Symposium, Medical Imaging Conference - Knoxville, United States Duration: 30.10.2010 → 06.11.2010

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@inproceedings{3cc1d7a73ab8429dab3f0f99d25f66d4,

title = "Two-Step Metal Artifact Reduction Using 2D-NFFT and Spherically Symmetric Basis Functions",

abstract = "In computed tomography metal objects lead to inconsistencies in the acquired data which result in image artifacts after reconstruction. To enhance the image quality and allow for a more accurate diagnosis, a metal artifact reduction is required. Approaches may base on a recomputation of metal influenced values or use an alternative image reconstruction technique, which is less sensitive to inconsistent raw data than the standard filtered backprojection. Here, a two-step algorithm for metal artifact reduction is proposed, which combines a 2D NFFT-based interpolation and an MLEM reconstruction with spherically symmetric basis functions (blobs). Reconstructed images have been evaluated visually and quantitatively. Experiments show that combination of a 2D NFFT-based interpolation and blobs offers an effective strategy for enhanced metal artifacts suppression.",

author = "Yulia Levakhina and Baerbel Kratz and Buzug, {Thorsten M.}",

year = "2010",

month = dec,

day = "1",

doi = "10.1109/NSSMIC.2010.5874424",

language = "English",

isbn = "978-1-4244-9106-3 ",

series = "IEEE Nuclear Science Symposium Conference Record",

publisher = "IEEE",

pages = "3343--3345",

booktitle = "IEEE Nuclear Science Symposuim & Medical Imaging Conference",

note = "2010 IEEE Nuclear Science Symposium, Medical Imaging Conference, NSS/MIC 2010 ; Conference date: 30-10-2010 Through 06-11-2010",

}

Levakhina, Y, Kratz, B & Buzug, TM 2010, Two-Step Metal Artifact Reduction Using 2D-NFFT and Spherically Symmetric Basis Functions. in IEEE Nuclear Science Symposuim & Medical Imaging Conference., 5874424, IEEE Nuclear Science Symposium Conference Record, IEEE, pp. 3343-3345, 2010 IEEE Nuclear Science Symposium, Medical Imaging Conference, Knoxville, Tennessee, United States, 30.10.10. https://doi.org/10.1109/NSSMIC.2010.5874424

Two-Step Metal Artifact Reduction Using 2D-NFFT and Spherically Symmetric Basis Functions. / Levakhina, Yulia; Kratz, Baerbel; Buzug, Thorsten M.
IEEE Nuclear Science Symposuim & Medical Imaging Conference. IEEE, 2010. p. 3343-3345 5874424 (IEEE Nuclear Science Symposium Conference Record).

Research output: Chapters in Books/Reports/Conference Proceedings › Conference contribution › peer-review

TY - GEN

T1 - Two-Step Metal Artifact Reduction Using 2D-NFFT and Spherically Symmetric Basis Functions

AU - Levakhina, Yulia

AU - Kratz, Baerbel

AU - Buzug, Thorsten M.

PY - 2010/12/1

Y1 - 2010/12/1

N2 - In computed tomography metal objects lead to inconsistencies in the acquired data which result in image artifacts after reconstruction. To enhance the image quality and allow for a more accurate diagnosis, a metal artifact reduction is required. Approaches may base on a recomputation of metal influenced values or use an alternative image reconstruction technique, which is less sensitive to inconsistent raw data than the standard filtered backprojection. Here, a two-step algorithm for metal artifact reduction is proposed, which combines a 2D NFFT-based interpolation and an MLEM reconstruction with spherically symmetric basis functions (blobs). Reconstructed images have been evaluated visually and quantitatively. Experiments show that combination of a 2D NFFT-based interpolation and blobs offers an effective strategy for enhanced metal artifacts suppression.

AB - In computed tomography metal objects lead to inconsistencies in the acquired data which result in image artifacts after reconstruction. To enhance the image quality and allow for a more accurate diagnosis, a metal artifact reduction is required. Approaches may base on a recomputation of metal influenced values or use an alternative image reconstruction technique, which is less sensitive to inconsistent raw data than the standard filtered backprojection. Here, a two-step algorithm for metal artifact reduction is proposed, which combines a 2D NFFT-based interpolation and an MLEM reconstruction with spherically symmetric basis functions (blobs). Reconstructed images have been evaluated visually and quantitatively. Experiments show that combination of a 2D NFFT-based interpolation and blobs offers an effective strategy for enhanced metal artifacts suppression.

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U2 - 10.1109/NSSMIC.2010.5874424

DO - 10.1109/NSSMIC.2010.5874424

M3 - Conference contribution

SN - 978-1-4244-9106-3

SN - 978-1-4244-9104-9

T3 - IEEE Nuclear Science Symposium Conference Record

SP - 3343

EP - 3345

BT - IEEE Nuclear Science Symposuim & Medical Imaging Conference

PB - IEEE

T2 - 2010 IEEE Nuclear Science Symposium, Medical Imaging Conference

Y2 - 30 October 2010 through 6 November 2010

ER -

Two-Step Metal Artifact Reduction Using 2D-NFFT and Spherically Symmetric Basis Functions

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