Resolution improvement in thick-slab magnetic resonance digital subtraction angiography using SENSE at 3T

Paul E. Summers, Spyros S. Kollias, Anton Valavanis

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Purpose: To evaluate the use of parallel imaging (sensitivity encoding [SENSE]) to improve spatial resolution and achieve sub-second temporal resolution in fluoroscopic contrast-enhanced, magnetic resonance digital subtraction angiography (MR-DSA). Materials and Methods: A MR-DSA sequence was optimized on a 3-T scanner with respect to sampling bandwidth and SENSE acceleration factor subject to the constraints of half-second acquisition time and 0.6 × 1.2 mm in-plane resolution. MR-DSA with and without SENSE acceleration was then evaluated in patients with arterio-venous malformations (AVMs). Results: Consistent with previously reported results and theory, SENSE factors greater than two and increasing sampling bandwidth both led to increasing image noise. Compared to lower resolution MR-DSA images with similar temporal resolution, the SENSE accelerated sequence provided better spatial resolution without notable changes in the contrast enhancement of the vascular territories of the AVMs but was hampered somewhat in the late venous phases by a reconstruction artifact. Conclusion: SENSE acceleration of MR-DSA by a factor of two allows improved temporal or spatial resolution without significant loss of image quality. Signal-to-noise degradation associated with higher SENSE acceleration factors are likely to necessitate other approaches to further improving resolution in MR-DSA. Clinically, SENSE accelerated MR-DSA improves the non-invasive pre- and postoperative depiction of AVM flow dynamics.

Original languageEnglish
Pages (from-to)662-673
Number of pages12
JournalJournal of Magnetic Resonance Imaging
Volume20
Issue number4
DOIs
Publication statusPublished - Oct 2004

Fingerprint

Digital Subtraction Angiography
Magnetic Resonance Angiography
Artifacts
Blood Vessels
Noise

Keywords

  • Arterio-venous malformations
  • Magnetic resonance angiography
  • MR-DSA
  • Parallel imaging

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology

Cite this

Resolution improvement in thick-slab magnetic resonance digital subtraction angiography using SENSE at 3T. / Summers, Paul E.; Kollias, Spyros S.; Valavanis, Anton.

In: Journal of Magnetic Resonance Imaging, Vol. 20, No. 4, 10.2004, p. 662-673.

Research output: Contribution to journalArticle

@article{b7a5ce81d2bc40cca7c6ddc7257e493a,
title = "Resolution improvement in thick-slab magnetic resonance digital subtraction angiography using SENSE at 3T",
abstract = "Purpose: To evaluate the use of parallel imaging (sensitivity encoding [SENSE]) to improve spatial resolution and achieve sub-second temporal resolution in fluoroscopic contrast-enhanced, magnetic resonance digital subtraction angiography (MR-DSA). Materials and Methods: A MR-DSA sequence was optimized on a 3-T scanner with respect to sampling bandwidth and SENSE acceleration factor subject to the constraints of half-second acquisition time and 0.6 × 1.2 mm in-plane resolution. MR-DSA with and without SENSE acceleration was then evaluated in patients with arterio-venous malformations (AVMs). Results: Consistent with previously reported results and theory, SENSE factors greater than two and increasing sampling bandwidth both led to increasing image noise. Compared to lower resolution MR-DSA images with similar temporal resolution, the SENSE accelerated sequence provided better spatial resolution without notable changes in the contrast enhancement of the vascular territories of the AVMs but was hampered somewhat in the late venous phases by a reconstruction artifact. Conclusion: SENSE acceleration of MR-DSA by a factor of two allows improved temporal or spatial resolution without significant loss of image quality. Signal-to-noise degradation associated with higher SENSE acceleration factors are likely to necessitate other approaches to further improving resolution in MR-DSA. Clinically, SENSE accelerated MR-DSA improves the non-invasive pre- and postoperative depiction of AVM flow dynamics.",
keywords = "Arterio-venous malformations, Magnetic resonance angiography, MR-DSA, Parallel imaging",
author = "Summers, {Paul E.} and Kollias, {Spyros S.} and Anton Valavanis",
year = "2004",
month = "10",
doi = "10.1002/jmri.20156",
language = "English",
volume = "20",
pages = "662--673",
journal = "Journal of Magnetic Resonance Imaging",
issn = "1053-1807",
publisher = "John Wiley and Sons Inc.",
number = "4",

}

TY - JOUR

T1 - Resolution improvement in thick-slab magnetic resonance digital subtraction angiography using SENSE at 3T

AU - Summers, Paul E.

AU - Kollias, Spyros S.

AU - Valavanis, Anton

PY - 2004/10

Y1 - 2004/10

N2 - Purpose: To evaluate the use of parallel imaging (sensitivity encoding [SENSE]) to improve spatial resolution and achieve sub-second temporal resolution in fluoroscopic contrast-enhanced, magnetic resonance digital subtraction angiography (MR-DSA). Materials and Methods: A MR-DSA sequence was optimized on a 3-T scanner with respect to sampling bandwidth and SENSE acceleration factor subject to the constraints of half-second acquisition time and 0.6 × 1.2 mm in-plane resolution. MR-DSA with and without SENSE acceleration was then evaluated in patients with arterio-venous malformations (AVMs). Results: Consistent with previously reported results and theory, SENSE factors greater than two and increasing sampling bandwidth both led to increasing image noise. Compared to lower resolution MR-DSA images with similar temporal resolution, the SENSE accelerated sequence provided better spatial resolution without notable changes in the contrast enhancement of the vascular territories of the AVMs but was hampered somewhat in the late venous phases by a reconstruction artifact. Conclusion: SENSE acceleration of MR-DSA by a factor of two allows improved temporal or spatial resolution without significant loss of image quality. Signal-to-noise degradation associated with higher SENSE acceleration factors are likely to necessitate other approaches to further improving resolution in MR-DSA. Clinically, SENSE accelerated MR-DSA improves the non-invasive pre- and postoperative depiction of AVM flow dynamics.

AB - Purpose: To evaluate the use of parallel imaging (sensitivity encoding [SENSE]) to improve spatial resolution and achieve sub-second temporal resolution in fluoroscopic contrast-enhanced, magnetic resonance digital subtraction angiography (MR-DSA). Materials and Methods: A MR-DSA sequence was optimized on a 3-T scanner with respect to sampling bandwidth and SENSE acceleration factor subject to the constraints of half-second acquisition time and 0.6 × 1.2 mm in-plane resolution. MR-DSA with and without SENSE acceleration was then evaluated in patients with arterio-venous malformations (AVMs). Results: Consistent with previously reported results and theory, SENSE factors greater than two and increasing sampling bandwidth both led to increasing image noise. Compared to lower resolution MR-DSA images with similar temporal resolution, the SENSE accelerated sequence provided better spatial resolution without notable changes in the contrast enhancement of the vascular territories of the AVMs but was hampered somewhat in the late venous phases by a reconstruction artifact. Conclusion: SENSE acceleration of MR-DSA by a factor of two allows improved temporal or spatial resolution without significant loss of image quality. Signal-to-noise degradation associated with higher SENSE acceleration factors are likely to necessitate other approaches to further improving resolution in MR-DSA. Clinically, SENSE accelerated MR-DSA improves the non-invasive pre- and postoperative depiction of AVM flow dynamics.

KW - Arterio-venous malformations

KW - Magnetic resonance angiography

KW - MR-DSA

KW - Parallel imaging

UR - http://www.scopus.com/inward/record.url?scp=4744368121&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4744368121&partnerID=8YFLogxK

U2 - 10.1002/jmri.20156

DO - 10.1002/jmri.20156

M3 - Article

C2 - 15390145

AN - SCOPUS:4744368121

VL - 20

SP - 662

EP - 673

JO - Journal of Magnetic Resonance Imaging

JF - Journal of Magnetic Resonance Imaging

SN - 1053-1807

IS - 4

ER -