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

1 Citation (Scopus)

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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10.1109/NSSMIC.2010.5874424

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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.

UR - https://www.scopus.com/pages/publications/79960302348

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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