3.0- Versus 1.5-T MR Cholangiography: A Pilot Study

Merkle, Elmar M.; Haugan, P A; Thomas, John V.; Jaffe, Tracy A.; Gullotto, Chiara

doi:10.2214/ajr.04.1484

Cited by 43 publications

(24 citation statements)

References 16 publications

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“…This gain in SNR can be kept or traded for speed, spatial resolution, or both [2,3]. Besides the anticipated gain in SNR, however, the size of MR artifacts, such as susceptibility artifacts, is also increased at higher magnetic field strengths, as described in previous studies comparing susceptibility artifact size at 0.2-T and 1.5-T MR imaging [4,5].…”

Section: Discussionmentioning

confidence: 92%

MR liver imaging and cholangiography in the presence of surgical metallic clips at 1.5 and 3 Tesla

et al. 2006

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To evaluate whether clips from prior cholecystectomy impair image quality during magnetic resonance cholangiography (MRC) at 3 Tesla (T) compared with 1.5 T, surgical clips were embedded in a gel phantom and positioned at predefined distances from a fluid-filled tube designed to simulate the bile duct. The maximum clip distance was noted where susceptibility artifacts obscured the fluid-filled tube at 1.5 T and 3 T. Susceptibility artifact size was calculated for each sequence within each magnet class. In vivo analysis included 42 patients postcholecystectomy who underwent MRC at either 1.5 T or 3 T. In vitro, mean area of susceptibility artifacts was 104 mm2 on 3-T and 75 mm2 on 1.5-T MR imaging (MRI). While surgical clips within a 2-mm range impaired visualization of the fluid-filled tube on 1.5-T MRI, this range increased to 4 mm on 3-T MRI. In vivo, MRC image quality was impaired by susceptibility artifacts in three of 21 cases at 3 T and in two of 21 cases at 1.5 T. Overall, biliary pseudo-obstructions due to susceptibility artifacts from cholecystectomy surgical clips were not substantially more common on 3-T MRC in clinical practice, and patients with a history of prior cholecystectomy should not be excluded from a 3-T MRC.

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Section: Discussionmentioning

confidence: 92%

MR liver imaging and cholangiography in the presence of surgical metallic clips at 1.5 and 3 Tesla

et al. 2006

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“…This high signal is expected to benefit many MR applications including MRCP. Actual improvement in the image quality of MRCP at 3.0 T has been shown in adults [9][10][11][12]. Given the reduced anatomic size of the biliary ducts and the reduced amount of bile contained, the improved high signal is likely to be of more benefit for paediatric MRCPs.…”

Section: Artefactsmentioning

confidence: 99%

“…The inherent improved signal available with 3-T scanners, which were introduced for clinical use in the last decade, is expected to improve the quality of MRCP [8]. MRCP at 3.0 T has been found to be superior in contrast-to-noise ratio and overall image quality in adult healthy volunteers and adult patients [9][10][11][12]. Paediatric MRCP is likely to benefit at 3.0 T even more because of the smaller calibre of ducts seen in young children.…”

mentioning

confidence: 99%

MR cholangiopancreatography at 3.0 T in children: diagnostic quality and ability in assessment of common paediatric pancreatobiliary pathology

Almehdar

Chavhan²

2013

BJR

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Objective: To assess the diagnostic quality of MR cholangiopancreatography (MRCP) at 3.0 T in children and to assess its diagnostic ability in answering the clinical query. Also, to determine the frequency of artefacts and anatomic variations in ductal anatomy.Methods: Consecutive MRCPs performed in children using a 3-T scanner were retrospectively reviewed to note indications, findings, imaging diagnosis, normal variants, quality and artefacts. Analysis was performed based on the final diagnosis assigned by pathology or the combination of clinical, laboratory, imaging features and follow-up to determine whether it was possible to answer the clinical query by MRCP findings.Results: There were 82 MRCPs performed at 3.0 T on 77 children. 42/82 (51%) MRCPs were of good quality, 35/82 (43%) MRCPs were suboptimal but diagnostic and the remaining 5/82 (6%) MRCPs were nondiagnostic. MRCP answered the clinical query in 61/82 (74%) cases; however, it did not answer the clinical query in 11/82 (14%) cases and was equivocal in 10/82 (12%) cases. There was significant association between the quality of MRCP and the ability of MRCP to answer the clinical query (p,0.0001). 64/82 (78%) MRCP examinations had at least 1 artefact. Variation in the bile duct anatomy was seen in 27/77 (35%) children.

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“…Although dielectric effects [12,13] may produce artifacts, the visualization of anatomic details may be better on 3 T-than 1.5 T MRCP scans [14][15][16]. On 3T MR units, the specific absorption ratio (SAR) can be problematic and may require a change in the protocol, especially if it involves the 3D method with high spatial resolution and a large number of slices [5,6].…”

Section: Magnetic Resonance Cholangiopancreatography (Mrcp)mentioning

confidence: 99%

mentioning

confidence: 99%

Clinical application of navigator-gated three-dimensional balanced turbo-field-echo magnetic resonance cholangiopancreatography at 3 T: prospective intraindividual comparison with 1.5 T

et al. 2016

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3.0- Versus 1.5-T MR Cholangiography: A Pilot Study

Abstract: Compared with MR cholangiography at 1.5 T, MR cholangiography at 3.0 T offers improved contrast-to-noise ratio and a higher level of confidence for depicting intrahepatic variants.

Cited by 43 publications

References 16 publications

MR liver imaging and cholangiography in the presence of surgical metallic clips at 1.5 and 3 Tesla

MR liver imaging and cholangiography in the presence of surgical metallic clips at 1.5 and 3 Tesla

MR cholangiopancreatography at 3.0 T in children: diagnostic quality and ability in assessment of common paediatric pancreatobiliary pathology

Clinical application of navigator-gated three-dimensional balanced turbo-field-echo magnetic resonance cholangiopancreatography at 3 T: prospective intraindividual comparison with 1.5 T

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