title: HASTE sequence with parallel acquisition and T2 decay compensation: application to carotid artery imaging.
abstract: T2-weighted carotid artery images acquired using the turbo spin-echo (TSE) sequence frequently suffer from motion artifacts due to respiration and blood pulsation. The possibility of using HASTE sequence to achieve motion-free carotid images was investigated. The HASTE sequence suffers from severe blurring artifacts due to signal loss in later echoes due to T2 decay. Combining HASTE with parallel acquisition (PHASTE) decreases the number of echoes acquired and thus effectively reduces the blurring artifact caused by T2 relaxation. Further improvement in image sharpness can be achieved by performing T2 decay compensation before reconstructing the PHASTE data. Preliminary results have shown successful suppression of motion artifacts with PHASTE imaging. The image quality was enhanced relative to the original HASTE image, but was still less sharp than a non-motion-corrupted TSE image.
authors.affiliation: Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, UT 84108, USA. lzhang@ucair.med.utah.edu
authors.forename: Ling
authors.initials: L
authors.lastname: Zhang
authors.forename: Eugene G
authors.initials: EG
authors.lastname: Kholmovski
authors.forename: Junyu
authors.initials: J
authors.lastname: Guo
authors.forename: Seong-Eun Kim
authors.initials: SE
authors.lastname: Choi
authors.forename: Glen R
authors.initials: GR
authors.lastname: Morrell
authors.forename: Dennis L
authors.initials: DL
authors.lastname: Parker
mesh_terms: D016477:Artifacts; D002339:Carotid Arteries / Q000033:anatomy & histology*; D002340:Carotid Artery Diseases / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D009068:Movement; D019047:Phantoms, Imaging