Hip imaging of avascular necrosis at 7 Tesla compared with 3 Tesla.

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Abstrakt

Tytuł:: Hip imaging of avascular necrosis at 7 Tesla compared with 3 Tesla.
Autorzy:: Theysohn JM; Erwin L. Hahn Institute for Magnetic Resonance Imaging, University Duisburg-Essen, Essen, Germany, .
Kraff O
Theysohn N
Orzada S
Landgraeber S
Ladd ME
Lauenstein TC
Źródło:: Skeletal radiology [Skeletal Radiol] 2014 May; Vol. 43 (5), pp. 623-32. Date of Electronic Publication: 2014 Feb 05.
Typ publikacji:: Comparative Study; Journal Article
Język:: English
Imprint Name(s):: Publication: Berlin : Springer Verlag
Original Publication: Berlin, New York, Springer International.
MeSH Terms:: Femur Head Necrosis/*pathology
Hip Joint/*pathology
Image Enhancement/*methods
Image Interpretation, Computer-Assisted/*methods
Magnetic Resonance Imaging/*methods
Adult ; Aged ; Female ; Humans ; Male ; Middle Aged ; Reproducibility of Results ; Sensitivity and Specificity
References:: Magn Reson Med. 2012 Apr;67(4):954-64. (PMID: 22102483)
Clin Radiol. 2004 Dec;59(12):1079-93. (PMID: 15556590)
J Am Acad Orthop Surg. 1999 Jul-Aug;7(4):250-61. (PMID: 10434079)
Orthop Clin North Am. 1997 Jul;28(3):461-77. (PMID: 9208837)
AJNR Am J Neuroradiol. 2009 Apr;30(4):699-702. (PMID: 19147714)
Magn Reson Med. 2013 Nov;70(5):1434-9. (PMID: 23233430)
J Bone Joint Surg Br. 2012 Jul;94(7):969-73. (PMID: 22733955)
Orthopade. 2000 May;29(5):380-8. (PMID: 10875132)
AJR Am J Roentgenol. 2010 Jul;195(1):W63-8. (PMID: 20566783)
J Magn Reson Imaging. 2011 Mar;33(3):661-7. (PMID: 21563250)
J Tissue Eng Regen Med. 2013 Nov;7(11):893-900. (PMID: 22489064)
Eur Radiol. 2012 Oct;22(10):2211-20. (PMID: 22653280)
Eur Radiol. 2012 Nov;22(11):2338-46. (PMID: 22688127)
Top Magn Reson Imaging. 1996 Aug;8(4):231-46. (PMID: 8870181)
MAGMA. 2013 Aug;26(4):401-10. (PMID: 23315236)
Magn Reson Imaging Clin N Am. 2007 Aug;15(3):449-65, viii. (PMID: 17893062)
Magn Reson Med. 2013 May;69(5):1379-88. (PMID: 22714835)
Skeletal Radiol. 2013 Nov;42(11):1555-63. (PMID: 23955579)
NMR Biomed. 2012 Jan;25(1):27-34. (PMID: 21774009)
Magn Reson Med. 2001 Jul;46(1):24-30. (PMID: 11443707)
Eur Radiol. 2013 Sep;23(9):2364-73. (PMID: 23645332)
J Magn Reson Imaging. 2007 Feb;25(2):262-9. (PMID: 17260399)
Clin Orthop Relat Res. 1992 Apr;(277):98-110. (PMID: 1555362)
Magn Reson Imaging Clin N Am. 2007 Aug;15(3):349-53, vi. (PMID: 17893054)
Eur Radiol. 2013 Nov;23(11):2969-78. (PMID: 23896763)
Orthopade. 2005 Feb;34(2):171-83; quiz 184. (PMID: 15714357)
J Magn Reson Imaging. 2012 Sep;36(3):714-21. (PMID: 22649028)
J Nutr. 2009 Mar;139(3):502-6. (PMID: 19176752)
Magn Reson Med. 2014 May;71(5):1711-9. (PMID: 23798333)
Rofo. 2007 Dec;179(12):1231-5. (PMID: 18004692)
Eur J Radiol. 2012 Aug;81(8):1846-50. (PMID: 21665397)
J Bone Joint Surg Am. 1995 Mar;77(3):459-74. (PMID: 7890797)
Hip Int. 2012 Sep-Oct;22(5):489-93. (PMID: 23100153)
NMR Biomed. 2012 Oct;25(10):1202-8. (PMID: 22311346)
NMR Biomed. 2012 May;25(5):695-716. (PMID: 22102481)
J Bone Joint Surg Br. 1975 Aug;57(3):360-3. (PMID: 1158947)
Magn Reson Med. 2005 Feb;53(2):479-84. (PMID: 15678525)
Eur J Radiol. 2008 Jan;65(1):29-35. (PMID: 18162353)
J Magn Reson Imaging. 2008 Jun;27(6):1443-7. (PMID: 18421685)
Eur Radiol. 2006 Jun;16(6):1298-307. (PMID: 16541224)
Skeletal Radiol. 2009 Jun;38(6):559-64. (PMID: 19234700)
J Bone Joint Surg Br. 1985 Jan;67(1):3-9. (PMID: 3155745)
Entry Date(s):: Date Created: 20140206 Date Completed: 20141118 Latest Revision: 20211021
Update Code:: 20240104
DOI:: 10.1007/s00256-014-1818-5
PMID:: 24496584
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Objectives: To compare ultra-high field, high-resolution bilateral magnetic resonance imaging (MRI) of the hips at 7 Tesla (T) with 3 T MRI in patients with avascular necrosis (AVN) of the femoral head by subjective image evaluations, contrast measurements, and evaluation of the appearance of imaging abnormalities.
Materials and Methods: Thirteen subjects with avascular necrosis treated using advanced core decompression underwent MRI at both 7 T and 3 T. Sequence parameters as well as resolution were kept identical for both field strengths. All MR images (MEDIC, DESS, PD/T2w TSE, T1w TSE, and STIR) were evaluated by two radiologists with regard to subjective image quality, soft tissue contrasts, B1 homogeneity (four-point scale, higher values indicating better image quality) and depiction of imaging abnormalities of the femoral heads (three-point scale, higher values indicating the superiority of 7 T). Contrast ratios of soft tissues were calculated and compared with subjective data.
Results: 7-T imaging of the femoral joints, as well as 3-T imaging, achieved "good" to "very good" quality in all sequences. 7 T showed significantly higher soft tissue contrasts for T2w and MEDIC compared with 3 T (cartilage/fluid: 2.9 vs 2.2 and 3.6 vs 2.6), better detailed resolution for cartilage defects (PDw, T2w, T1w, MEDIC, DESS > 2.5) and better visibility of joint effusions (MEDIC 2.6; PDw/T2w 2.4; DESS 2.2). Image homogeneity compared with 3 T (3.9-4.0 for all sequences) was degraded, especially in TSE sequences at 7 T through signal variations (7 T: 2.1-2.9); to a lesser extent also GRE sequences (7 T: 2.9-3.5). Imaging findings related to untreated or treated AVN were better delineated at 3 T (≤1.8), while joint effusions (2.2-2.6) and cartilage defects (2.5-3.0) were better visualized at 7 T. STIR performed much more poorly at 7 T, generating large contrast variations (1.5).
Conclusions: 7-T hip MRI showed comparable results in hip joint imaging compared with 3 T with slight advantages in contrast detail (cartilage defects) and fluid detection at 7 T when accepting image degradation medially.

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