BACKGROUND AND PURPOSE: We hypothesize that the nearly doubling of signal-to-noise ratio at 3.0 T compared with that at 1.5 T yields improved clinical MR angiograms and enables superior visualization of intracranial aneurysms. The goal of this study was to determine whether 3.0-T time-of-flight (TOF) MR angiography is superior to 1.5-T TOF MR angiography in the detection and characterization of intracranial aneurysms. METHODS: Fifty consecutive patients referred for MR angiography of a known or suspected intracranial aneurysm underwent 3-T TOF MR angiography. Seventeen of these 50 patients had also previously undergone 1.5-T TOF MR angiography and these images were used as a basis for comparison with images obtained at 3.0 T. Fourteen of 23 patients in whom aneurysms were identified also underwent prior conventional angiography, which was used as the reference standard. Readers blinded to patient history identified the presence and location of aneurysm(s) on angiograms and graded images for overall image quality by using a five-point scale. RESULTS: Twenty-eight aneurysms were identified in 23 of 50 patients. Seventeen aneurysms in 17 patients had been documented with 1.5-T MR angiography. The 3.0-T technique had a higher mean image quality score than that of the 1.5-T MR technique (P <.0001). Both 3.0-T and 1.5-T TOF MR angiography depicted all the aneurysms that had been documented by conventional angiography. CONCLUSION: 3D TOF MR angiography at 3 T offers superior depiction of intracranial aneurysms compared with that of 1.5-T TOF MR angiography.
BACKGROUND AND PURPOSE: We hypothesize that the nearly doubling of signal-to-noise ratio at 3.0 T compared with that at 1.5 T yields improved clinical MR angiograms and enables superior visualization of intracranial aneurysms. The goal of this study was to determine whether 3.0-T time-of-flight (TOF) MR angiography is superior to 1.5-T TOF MR angiography in the detection and characterization of intracranial aneurysms. METHODS: Fifty consecutive patients referred for MR angiography of a known or suspected intracranial aneurysm underwent 3-T TOF MR angiography. Seventeen of these 50 patients had also previously undergone 1.5-T TOF MR angiography and these images were used as a basis for comparison with images obtained at 3.0 T. Fourteen of 23 patients in whom aneurysms were identified also underwent prior conventional angiography, which was used as the reference standard. Readers blinded to patient history identified the presence and location of aneurysm(s) on angiograms and graded images for overall image quality by using a five-point scale. RESULTS: Twenty-eight aneurysms were identified in 23 of 50 patients. Seventeen aneurysms in 17 patients had been documented with 1.5-T MR angiography. The 3.0-T technique had a higher mean image quality score than that of the 1.5-T MR technique (P <.0001). Both 3.0-T and 1.5-T TOF MR angiography depicted all the aneurysms that had been documented by conventional angiography. CONCLUSION: 3D TOF MR angiography at 3 T offers superior depiction of intracranial aneurysms compared with that of 1.5-T TOF MR angiography.
Authors: David O Wiebers; J P Whisnant; J Huston; I Meissner; R D Brown; D G Piepgras; G S Forbes; K Thielen; D Nichols; W M O'Fallon; J Peacock; L Jaeger; N F Kassell; G L Kongable-Beckman; J C Torner Journal: Lancet Date: 2003-07-12 Impact factor: 79.321
Authors: J Huston; D A Nichols; P H Luetmer; J T Goodwin; F B Meyer; D O Wiebers; A L Weaver Journal: AJNR Am J Neuroradiol Date: 1994-10 Impact factor: 3.825
Authors: Joanna M Wardlaw; Will Brindle; Ana M Casado; Kirsten Shuler; Moira Henderson; Brenda Thomas; Jennifer Macfarlane; Susana Muñoz Maniega; Katherine Lymer; Zoe Morris; Cyril Pernet; William Nailon; Trevor Ahearn; Abdul Nashirudeen Mumuni; Carlos Mugruza; John McLean; Goultchira Chakirova; Yuehui Terry Tao; Johanna Simpson; Andrew C Stanfield; Harriet Johnston; Jehill Parikh; Natalie A Royle; Janet De Wilde; Mark E Bastin; Nick Weir; Andrew Farrall; Maria C Valdes Hernandez Journal: Eur Radiol Date: 2012-06-09 Impact factor: 5.315
Authors: Winfried A Willinek; Thomas Bayer; Jürgen Gieseke; Marcus von Falkenhausen; Torsten Sommer; Romhild Hoogeveen; Kai Wilhelm; Horst Urbach; Hans H Schild Journal: Eur Radiol Date: 2006-08-30 Impact factor: 5.315
Authors: Stefan Maderwald; Susanne C Ladd; Elke R Gizewski; Oliver Kraff; Jens M Theysohn; Karsten Wicklow; Christoph Moenninghoff; Isabel Wanke; Mark E Ladd; Harald H Quick Journal: MAGMA Date: 2008-01-04 Impact factor: 2.310
Authors: T J Kaufmann; J Huston; H J Cloft; J Mandrekar; L Gray; M A Bernstein; J L Atkinson; D F Kallmes Journal: AJNR Am J Neuroradiol Date: 2009-12-17 Impact factor: 3.825