Parallel imaging enhanced MR colonography using a phantom model.

Hdl Handle:
http://hdl.handle.net/10147/136780
Title:
Parallel imaging enhanced MR colonography using a phantom model.
Authors:
Morrin, Martina M; Pedrosa, Ivan; McKenzie, Charles A; Farrell, Richard J; Bloch, Nicolas; Solazzo, Stephanie; Ngo, Long; Goldberg, Shraga N; Rofsky, Neil M
Affiliation:
Department of Radiology, Beaumont Hospital, Dublin, Ireland. mmorrin@rcsi.ie
Citation:
Parallel imaging enhanced MR colonography using a phantom model. 2008, 28 (3):664-72 J Magn Reson Imaging
Journal:
Journal of magnetic resonance imaging : JMRI
Issue Date:
Sep-2008
URI:
http://hdl.handle.net/10147/136780
DOI:
10.1002/jmri.21357
PubMed ID:
18777549
Additional Links:
http://www.ncbi.nlm.nih.gov/pubmed/18777549
Abstract:
To compare various Array Spatial and Sensitivity Encoding Technique (ASSET)-enhanced T2W SSFSE (single shot fast spin echo) and T1-weighted (T1W) 3D SPGR (spoiled gradient recalled echo) sequences for polyp detection and image quality at MR colonography (MRC) in a phantom model. Limitations of MRC using standard 3D SPGR T1W imaging include the long breath-hold required to cover the entire colon within one acquisition and the relatively low spatial resolution due to the long acquisition time. Parallel imaging using ASSET-enhanced T2W SSFSE and 3D T1W SPGR imaging results in much shorter imaging times, which allows for increased spatial resolution.; Using two porcine colon phantoms each with eight simulated 3-10-mm "polyps," baseline reference sequences acquired without ASSET (6-mm slices and readout bandwidth [BW] 62 kHz) were compared with 11 SSFSE and 8 SPGR sequences acquired with 2-fold ASSET acceleration. ASSET-enhanced SSFSE and SPGR sequences comprised BW/matrix combinations ranging from 20-62 kHz/256-352x256, respectively, with slice thicknesses adjusted from 3.0 to 4.5 mm to maintain a 23-26-second acquisition time and 30 cm slab thickness. Two experienced radiologists viewed the datasets in a randomized, blinded fashion.; Compared to reference sequences, ASSET-enhanced SSFSE and SPGR sequences facilitated better polyp detection and had similar overall image quality and per-phantom specificity. The two best ASSET-enhanced SSFSE (3 and 4.5 mm slices, each with BW of 62.5 kHz and 352x256 matrices) and three best ASSET-enhanced SPGR BW/slice thickness/matrix combinations of 31 kHz/4.4 msec/192x256; 62/3.4/192x256; and 62/4.0/192x256, respectively, permitted detection of all polyps>or=5 mm.; Parallel imaging using ASSET-enhanced T2W SSFSE and T1W 3D SPGR improves the ability to detect significant colon polyps in an MRC phantom model.
Item Type:
Article
Language:
en
MeSH:
Algorithms; Animals; Colon; Colonic Polyps; Image Enhancement; Image Interpretation, Computer-Assisted; Imaging, Three-Dimensional; Magnetic Resonance Imaging; Pattern Recognition, Automated; Phantoms, Imaging; Reproducibility of Results; Sensitivity and Specificity; Subtraction Technique; Swine
ISSN:
1053-1807

Full metadata record

DC FieldValue Language
dc.contributor.authorMorrin, Martina Men
dc.contributor.authorPedrosa, Ivanen
dc.contributor.authorMcKenzie, Charles Aen
dc.contributor.authorFarrell, Richard Jen
dc.contributor.authorBloch, Nicolasen
dc.contributor.authorSolazzo, Stephanieen
dc.contributor.authorNgo, Longen
dc.contributor.authorGoldberg, Shraga Nen
dc.contributor.authorRofsky, Neil Men
dc.date.accessioned2011-07-25T08:34:43Z-
dc.date.available2011-07-25T08:34:43Z-
dc.date.issued2008-09-
dc.identifier.citationParallel imaging enhanced MR colonography using a phantom model. 2008, 28 (3):664-72 J Magn Reson Imagingen
dc.identifier.issn1053-1807-
dc.identifier.pmid18777549-
dc.identifier.doi10.1002/jmri.21357-
dc.identifier.urihttp://hdl.handle.net/10147/136780-
dc.description.abstractTo compare various Array Spatial and Sensitivity Encoding Technique (ASSET)-enhanced T2W SSFSE (single shot fast spin echo) and T1-weighted (T1W) 3D SPGR (spoiled gradient recalled echo) sequences for polyp detection and image quality at MR colonography (MRC) in a phantom model. Limitations of MRC using standard 3D SPGR T1W imaging include the long breath-hold required to cover the entire colon within one acquisition and the relatively low spatial resolution due to the long acquisition time. Parallel imaging using ASSET-enhanced T2W SSFSE and 3D T1W SPGR imaging results in much shorter imaging times, which allows for increased spatial resolution.-
dc.description.abstractUsing two porcine colon phantoms each with eight simulated 3-10-mm "polyps," baseline reference sequences acquired without ASSET (6-mm slices and readout bandwidth [BW] 62 kHz) were compared with 11 SSFSE and 8 SPGR sequences acquired with 2-fold ASSET acceleration. ASSET-enhanced SSFSE and SPGR sequences comprised BW/matrix combinations ranging from 20-62 kHz/256-352x256, respectively, with slice thicknesses adjusted from 3.0 to 4.5 mm to maintain a 23-26-second acquisition time and 30 cm slab thickness. Two experienced radiologists viewed the datasets in a randomized, blinded fashion.-
dc.description.abstractCompared to reference sequences, ASSET-enhanced SSFSE and SPGR sequences facilitated better polyp detection and had similar overall image quality and per-phantom specificity. The two best ASSET-enhanced SSFSE (3 and 4.5 mm slices, each with BW of 62.5 kHz and 352x256 matrices) and three best ASSET-enhanced SPGR BW/slice thickness/matrix combinations of 31 kHz/4.4 msec/192x256; 62/3.4/192x256; and 62/4.0/192x256, respectively, permitted detection of all polyps>or=5 mm.-
dc.description.abstractParallel imaging using ASSET-enhanced T2W SSFSE and T1W 3D SPGR improves the ability to detect significant colon polyps in an MRC phantom model.-
dc.language.isoenen
dc.relation.urlhttp://www.ncbi.nlm.nih.gov/pubmed/18777549en
dc.subject.meshAlgorithms-
dc.subject.meshAnimals-
dc.subject.meshColon-
dc.subject.meshColonic Polyps-
dc.subject.meshImage Enhancement-
dc.subject.meshImage Interpretation, Computer-Assisted-
dc.subject.meshImaging, Three-Dimensional-
dc.subject.meshMagnetic Resonance Imaging-
dc.subject.meshPattern Recognition, Automated-
dc.subject.meshPhantoms, Imaging-
dc.subject.meshReproducibility of Results-
dc.subject.meshSensitivity and Specificity-
dc.subject.meshSubtraction Technique-
dc.subject.meshSwine-
dc.titleParallel imaging enhanced MR colonography using a phantom model.en
dc.typeArticleen
dc.contributor.departmentDepartment of Radiology, Beaumont Hospital, Dublin, Ireland. mmorrin@rcsi.ieen
dc.identifier.journalJournal of magnetic resonance imaging : JMRIen
dc.description.provinceLeinster-

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