Tags

Type your tag names separated by a space and hit enter

Compressed-sensing motion compensation (CosMo): a joint prospective-retrospective respiratory navigator for coronary MRI.
Magn Reson Med. 2011 Dec; 66(6):1674-81.MR

Abstract

Prospective right hemidiaphragm navigator (NAV) is commonly used in free-breathing coronary MRI. The NAV results in an increase in acquisition time to allow for resampling of the motion-corrupted k-space data. In this study, we are presenting a joint prospective-retrospective NAV motion compensation algorithm called compressed-sensing motion compensation (CosMo). The inner k-space region is acquired using a prospective NAV; for the outer k-space, a NAV is only used to reject the motion-corrupted data without reacquiring them. Subsequently, those unfilled k-space lines are retrospectively estimated using compressed sensing reconstruction. We imaged right coronary artery in nine healthy adult subjects. An undersampling probability map and sidelobe-to-peak ratio were calculated to study the pattern of undersampling, generated by NAV. Right coronary artery images were then retrospectively reconstructed using compressed-sensing motion compensation for gating windows between 3 and 10 mm and compared with the ones fully acquired within the gating windows. Qualitative imaging score and quantitative vessel sharpness were calculated for each reconstruction. The probability map and sidelobe-to-peak ratio show that the NAV generates a random undersampling k-space pattern. There were no statistically significant differences between the vessel sharpness and subjective score of the two reconstructions. Compressed-sensing motion compensation could be an alternative motion compensation technique for free-breathing coronary MRI that can be used to reduce scan time.

Authors+Show Affiliations

Department of Medicine, Cardiovascular Division, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21671266

Citation

Moghari, Mehdi H., et al. "Compressed-sensing Motion Compensation (CosMo): a Joint Prospective-retrospective Respiratory Navigator for Coronary MRI." Magnetic Resonance in Medicine, vol. 66, no. 6, 2011, pp. 1674-81.
Moghari MH, Akçakaya M, O'Connor A, et al. Compressed-sensing motion compensation (CosMo): a joint prospective-retrospective respiratory navigator for coronary MRI. Magn Reson Med. 2011;66(6):1674-81.
Moghari, M. H., Akçakaya, M., O'Connor, A., Basha, T. A., Casanova, M., Stanton, D., Goepfert, L., Kissinger, K. V., Goddu, B., Chuang, M. L., Tarokh, V., Manning, W. J., & Nezafat, R. (2011). Compressed-sensing motion compensation (CosMo): a joint prospective-retrospective respiratory navigator for coronary MRI. Magnetic Resonance in Medicine, 66(6), 1674-81. https://doi.org/10.1002/mrm.22950
Moghari MH, et al. Compressed-sensing Motion Compensation (CosMo): a Joint Prospective-retrospective Respiratory Navigator for Coronary MRI. Magn Reson Med. 2011;66(6):1674-81. PubMed PMID: 21671266.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Compressed-sensing motion compensation (CosMo): a joint prospective-retrospective respiratory navigator for coronary MRI. AU - Moghari,Mehdi H, AU - Akçakaya,Mehmet, AU - O'Connor,Alan, AU - Basha,Tamer A, AU - Casanova,Michele, AU - Stanton,Douglas, AU - Goepfert,Lois, AU - Kissinger,Kraig V, AU - Goddu,Beth, AU - Chuang,Michael L, AU - Tarokh,Vahid, AU - Manning,Warren J, AU - Nezafat,Reza, Y1 - 2011/06/10/ PY - 2010/10/30/received PY - 2011/01/22/revised PY - 2011/03/11/accepted PY - 2011/6/15/entrez PY - 2011/6/15/pubmed PY - 2012/4/3/medline SP - 1674 EP - 81 JF - Magnetic resonance in medicine JO - Magn Reson Med VL - 66 IS - 6 N2 - Prospective right hemidiaphragm navigator (NAV) is commonly used in free-breathing coronary MRI. The NAV results in an increase in acquisition time to allow for resampling of the motion-corrupted k-space data. In this study, we are presenting a joint prospective-retrospective NAV motion compensation algorithm called compressed-sensing motion compensation (CosMo). The inner k-space region is acquired using a prospective NAV; for the outer k-space, a NAV is only used to reject the motion-corrupted data without reacquiring them. Subsequently, those unfilled k-space lines are retrospectively estimated using compressed sensing reconstruction. We imaged right coronary artery in nine healthy adult subjects. An undersampling probability map and sidelobe-to-peak ratio were calculated to study the pattern of undersampling, generated by NAV. Right coronary artery images were then retrospectively reconstructed using compressed-sensing motion compensation for gating windows between 3 and 10 mm and compared with the ones fully acquired within the gating windows. Qualitative imaging score and quantitative vessel sharpness were calculated for each reconstruction. The probability map and sidelobe-to-peak ratio show that the NAV generates a random undersampling k-space pattern. There were no statistically significant differences between the vessel sharpness and subjective score of the two reconstructions. Compressed-sensing motion compensation could be an alternative motion compensation technique for free-breathing coronary MRI that can be used to reduce scan time. SN - 1522-2594 UR - https://www.unboundmedicine.com/medline/citation/21671266/Compressed_sensing_motion_compensation__CosMo_:_a_joint_prospective_retrospective_respiratory_navigator_for_coronary_MRI_ L2 - https://doi.org/10.1002/mrm.22950 DB - PRIME DP - Unbound Medicine ER -