Three-dimensional T1 and T2* mapping of human lung parenchyma using interleaved saturation recovery with dual echo ultrashort echo time imaging (ITSR-DUTE)

2016 ◽  
Vol 45 (4) ◽  
pp. 1097-1104 ◽  
Author(s):  
Neville D. Gai ◽  
Ashkan A. Malayeri ◽  
David A. Bluemke
Keyword(s):  
Human Lung ◽  
T2 Mapping ◽  
Three Dimensional ◽  
Lung Parenchyma ◽  
Saturation Recovery ◽  
Ultrashort Echo Time ◽  
Echo Time ◽  
T1 And T2 ◽  
Dual Echo

Exponential subtraction in 3D ultrashort echo time imaging to visualize short T2 tissues in tibia

2019 ◽  
Vol 61 (6) ◽  
pp. 760-767
Author(s):  
Sha Li ◽  
Xinrui Huang ◽  
Guozhen Li ◽  
Yibao Zhang ◽  
Zhaotong Li ◽  
...  
Keyword(s):  
Cortical Bone ◽  
Three Dimensional ◽  
Regions Of Interest ◽  
Observer Agreement ◽  
Exponential Factor ◽  
Ultrashort Echo Time ◽  
Short T2 ◽  
Exponential Factors ◽  
Echo Time ◽  
Dual Echo

Background Short T2 tissues can be directly visualized by dual-echo ultrashort echo time imaging with weighted subtraction. As a type of post-processing method, exponential subtraction of ultrashort echo time images with an optimal exponential factor is expected to provide improved positive short T2 contrast. Purpose To test the feasibility and effectiveness of exponential subtraction in three-dimensional ultrashort echo time imaging and to determine the optimal exponential factor. Material and Methods A dual-echo three-dimensional ultrashort echo time sequence was implemented on a 3-T MRI system. Exponential subtraction was performed on dual three-dimensional ultrashort echo time images of the tibia of seven healthy volunteers with exponential factors in the range of 1.00–3.00 in increments of 0.01. The regions of interest, including cortical bone, marrow, and muscle, were depicted on subtracted images of different exponential factors. Contrast-to-noise ratio values were calculated from these regions of interest and then used to assess the optimal exponential factor. To determine intra-observer agreement regarding region of interest selection, paired intra-observer measurements of regions of interest in all direct subtraction images were conducted with a one-week interval and the paired measurements were assessed using Bland–Altman analysis and paired-samples t-test. Results Cortical bone can be better visualized by using exponential subtraction in three-dimensional ultrashort echo time imaging; the suggested optimal exponential factor is 1.99–2.03 in the tibia. Paired measurements showed excellent intra-observer agreement. Conclusion It is feasible to visualize cortical bone of the tibia using exponential subtraction in three-dimensional ultrashort echo time imaging. Compared with weighted subtraction images, exponential subtraction images with an optimal exponential factor provide enhanced visualization of short T2 tissues.

Three-dimensional ultrashort echo time cones (3D UTE-Cones) magnetic resonance imaging of entheses and tendons

2018 ◽  
Vol 49 ◽  
pp. 4-9 ◽  
Author(s):  
Bimin Chen ◽  
Yinghua Zhao ◽  
Xin Cheng ◽  
Yajun Ma ◽  
Eric Y. Chang ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Three Dimensional ◽  
Resonance Imaging ◽  
Ultrashort Echo Time ◽  
Echo Time

Three-Dimensional Ultrashort Echo Time Imaging of Solid Polymers on a 3-Tesla Whole-Body MRI Scanner

2008 ◽  
Vol 43 (11) ◽  
pp. 802-808 ◽  
Author(s):  
Fabian Springer ◽  
Petros Martirosian ◽  
Nina F. Schwenzer ◽  
Michael Szimtenings ◽  
Peter Kreisler ◽  
...  
Keyword(s):  
Three Dimensional ◽  
3 Tesla ◽  
Whole Body ◽  
Ultrashort Echo Time ◽  
Whole Body Mri ◽  
Solid Polymers ◽  
Echo Time

scholarly journals Comparison of T2* mapping between regular echo time and ultrashort echo time with 3D cones at 3 tesla for knee meniscus

Medicine ◽  
2018 ◽  
Vol 97 (48) ◽  
pp. e13443 ◽  
Author(s):  
Jisook Yi ◽  
Young Han Lee ◽  
Ho-Taek Song ◽  
Jin-Suck Suh
Keyword(s):  
T2 Mapping ◽  
3 Tesla ◽  
Ultrashort Echo Time ◽  
Knee Meniscus ◽  
Echo Time

scholarly journals Oxygen-enhanced 3D radial ultrashort echo time magnetic resonance imaging in the healthy human lung

2014 ◽  
Vol 27 (12) ◽  
pp. 1535-1541 ◽  
Author(s):  
Stanley J. Kruger ◽  
Sean B. Fain ◽  
Kevin M. Johnson ◽  
Robert V. Cadman ◽  
Scott K. Nagle
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Human Lung ◽  
Resonance Imaging ◽  
Healthy Human ◽  
Ultrashort Echo Time ◽  
Echo Time

scholarly journals Pulmonary Embolism Detection with Three-dimensional Ultrashort Echo Time MR Imaging: Experimental Study in Canines

Radiology ◽  
2016 ◽  
Vol 278 (2) ◽  
pp. 413-421 ◽  
Author(s):  
Peter Bannas ◽  
Laura C. Bell ◽  
Kevin M. Johnson ◽  
Mark L. Schiebler ◽  
Christopher J. François ◽  
...  
Keyword(s):  
Experimental Study ◽  
Pulmonary Embolism ◽  
Mr Imaging ◽  
Three Dimensional ◽  
Ultrashort Echo Time ◽  
Echo Time
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