Ultrashort Echo Time MRI of Cortical Bone at 7 Tesla Field Strength: A Feasibility Study

被引：33

作者：

Krug, Roland ^{[1
]}

Larson, Peder Eric Zufall ^{[1
]}

Wang, Chunsheng ^{[1
]}

Burghardt, Andrew J. ^{[1
]}

Kelley, Douglas A. C. ^{[2
]}

Link, Thomas M. ^{[1
]}

Zhang, Xiaoliang ^{[1
]}

Vigneron, Daniel B. ^{[1
]}

Majumdar, Sharmila ^{[1
]}

机构：

[1] Univ Calif San Francisco, Dept Radiol & Biomed Imaging, San Francisco, CA 94143 USA

[2] GE Healthcare Technol, San Francisco, CA USA

来源：

JOURNAL OF MAGNETIC RESONANCE IMAGING | 2011年 / 34卷 / 03期

关键词：

7; Tesla; ultra-short MRI; cortical bone; MAGNETIC-RESONANCE; MUSCULOSKELETAL SYSTEM; WATER; RECONSTRUCTION; SEQUENCES; TISSUE; 7.0T;

D O I：

10.1002/jmri.22648

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

Purpose: To implement and examine the feasibility of a three-dimensional (3D) ultrashort TE (UTE) sequence on a 7 Tesla (T) clinical MR scanner in comparison with 3T MRI at high isotropic resolution. Materials and Methods: Using an in-house built saddle coil at both field strengths we have imaged mid-diaphysial sections of five fresh cadaveric specimens of the distal tibia. An additional in vivo scan was performed at 7 Tesla using a quadrature knee coil. Results: Using the same type of saddle coil at both field strengths, a significant increase in SNR at 7T compared with 3T (factor 1.7) was found. Significantly shorter T2* values were found at the higher field strength (T2* = 552.2 +/- 126 mu s at 7T versus T2* = 1163 +/- 391 mu s at 3T). Conclusion: UHF MRI at 7T has great potential for imaging tissues with short T2.

引用

页码：691 / 695

页数：5

共 19 条

[1] Rapid in vivo musculoskeletal MR with parallel imaging at 7T [J].

Banerjee, Suchandrima ;

Krug, Roland ;

Carballido-Gamio, Julio ;

Kelley, Douglas A. C. ;

Xu, Duan ;

Vigneron, Daniel B. ;

Majumdar, Sharmila .

MAGNETIC RESONANCE IN MEDICINE, 2008, 59 (03) :655-660

[2] Rapid gridding reconstruction with a minimal oversampling ratio [J].

Beatty, PJ ;

Nishimura, DG ;

Pauly, JM .

IEEE TRANSACTIONS ON MEDICAL IMAGING, 2005, 24 (06) :799-808

[3] LUNG PARENCHYMA - PROJECTION RECONSTRUCTION MR-IMAGING [J].

BERGIN, CJ ;

PAULY, JM ;

MACOVSKI, A .

RADIOLOGY, 1991, 179 (03) :777-781

[4] MRI of the Wrist at 7 Tesla Using an Eight-Channel Array Coil Combined with Parallel Imaging: Preliminary Results [J].

Chang, Gregory ;

Friedrich, Klaus M. ;

Wang, Ligong ;

Vieira, Renata L. R. ;

Schweitzer, Mark E. ;

Recht, Michael P. ;

Wiggins, Graham C. ;

Regatte, Ravinder R. .

JOURNAL OF MAGNETIC RESONANCE IMAGING, 2010, 31 (03) :740-746

[5] Ultrashort echo time spectroscopic imaging (UTESI) of cortical bone [J].

Du, Jiang ;

Hamilton, Gavin ;

Takahashi, Atsushi ;

Bydder, Mark ;

Chung, Christine B. .

MAGNETIC RESONANCE IN MEDICINE, 2007, 58 (05) :1001-1009

[6] Magnetic resonance imaging of short T2 components in tissue [J].

Gatehouse, PD ;

Bydder, GM .

CLINICAL RADIOLOGY, 2003, 58 (01) :1-19

[7] Characterization of 1H NMR Signal in Human Cortical Bone for Magnetic Resonance Imaging [J].

Horch, R. Adam ;

Nyman, Jeffry S. ;

Gochberg, Daniel F. ;

Dortch, Richard D. ;

Does, Mark D. .

MAGNETIC RESONANCE IN MEDICINE, 2010, 64 (03) :680-687

[8] In vivo ultra-high-field magnetic resonance imaging of trabecular bone microarchitecture at 7 T [J].

Krug, Roland ;

Carballido-Gamio, Julio ;

Banerjee, Suchandrima ;

Burghardt, Andrew J. ;

Link, Thomas M. ;

Majumdar, Sharmila .

JOURNAL OF MAGNETIC RESONANCE IMAGING, 2008, 27 (04) :854-859

[9] Imaging of the Musculoskeletal System In Vivo Using Ultra-high Field Magnetic Resonance at 7 T [J].

Krug, Roland ;

Stehling, Christoph ;

Kelley, Douglas A. C. ;

Majumdar, Sharmila ;

Link, Thomas M. .

INVESTIGATIVE RADIOLOGY, 2009, 44 (09) :613-618

[10] Ultra-high-field MRI of knee joint at 7.0T: Preliminary experience [J].

Pakin, S. Kubilay ;

Cavalcanti, Conrado ;

La Rocca, Renata ;

Schweitzer, Mark E. ;

Regatte, Ravinder R. .

ACADEMIC RADIOLOGY, 2006, 13 (09) :1135-1142

← 1 2 →