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Clin Neuroradiol. 2016 Mar;26(1):31-7. doi: 10.1007/s00062-014-0324-4. Epub 2014 Aug 1.

Novel Metal Artifact Reduction Techniques with Use of Slice-Encoding Metal Artifact Correction and View-Angle Tilting MR Imaging for Improved Visualization of Brain Tissue near Intracranial Aneurysm Clips.

Author information

1
Department of Neuroradiology, Klinikum rechts der Isar, Ismaningerstr. 22, 81675, Munich, Germany. benjamin.friedrich@tum.de.
2
Department of diagnostic and interventional Radiology, University Hospital Leipzig, Leipzig, Germany. benjamin.friedrich@tum.de.
3
Department of Neurosurgery, Klinikum rechts der Isar, Munich, Germany.
4
Department of Neuroradiology, Klinikum rechts der Isar, Ismaningerstr. 22, 81675, Munich, Germany.
5
Department of Radiology, Klinikum rechts der Isar, Munich, Germany.
6
Siemens Healthcare, Erlangen, Germany.

Abstract

PURPOSE:

The MR image quality after intracranial aneurysm clipping is often impaired because of artifacts induced by metal implants. The purpose of the present study was to evaluate the benefit of a new WARP sequence with slice-encoding metal artifact correction (SEMAC) and view-angle tilting (VAT) MR imaging as novel artifact reduction techniques.

MATERIALS AND METHODS:

A new WARP TSE (a work-in-progress software package provided by Siemens Healthcare) sequence was implemented for cranial applications based on a turbo spin echo (TSE) sequence. T1- and T2-weighted images with standard and WARP TSE sequences were acquired from 6 patients with 11 clipping sites, and the images were compared based on artifact size and general image quality.

RESULTS:

T2- and T1-weighted WARP TSE sequences resulted in a highly significant reduction of metal artifacts compared with standard sequences (T2w- WARP TSE: 89.8 ± 1.4 %; T1w- WARP TSE: 84.9 ± 2.9 %; p < 0.001) without a substantial loss of image quality.

CONCLUSION:

The use of a new WARP TSE sequence after aneurysm clipping is highly beneficial for increasing the diagnostic MR image quality due to a striking reduction of metal artifacts.

KEYWORDS:

Artifact; Clip; MRI; SEMAC; WARP

PMID:
25081235
DOI:
10.1007/s00062-014-0324-4
[Indexed for MEDLINE]

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