scholarly journals Assessment of vertebral fractures and edema of the thoracolumbar spine based on water‐fat and susceptibility‐weighted images derived from a single ultra‐short echo time scan

2021 ◽  
Author(s):  
Sophia Kronthaler ◽  
Christof Boehm ◽  
Georg Feuerriegel ◽  
Peter Börnert ◽  
Ulrich Katscher ◽  
...  
Keyword(s):  
Vertebral Fractures ◽  
Thoracolumbar Spine ◽  
Echo Time ◽  
Short Echo Time ◽  
Time Scan

scholarly journals CT-like images based on T1 spoiled gradient-echo and ultra-short echo time MRI sequences for the assessment of vertebral fractures and degenerative bone changes of the spine

2021 ◽  
Author(s):  
Benedikt J. Schwaiger ◽  
Charlotte Schneider ◽  
Sophia Kronthaler ◽  
Florian T. Gassert ◽  
Christof Böhm ◽  
...  
Keyword(s):  
Image Quality ◽  
Diagnostic Accuracy ◽  
Vertebral Fractures ◽  
Detection Sensitivity ◽  
Gradient Echo ◽  
Bone Changes ◽  
Mri Sequences ◽  
Echo Time ◽  
Short Echo Time ◽  
Spoiled Gradient Echo

Abstract Objectives To evaluate the performance of 3D T1w spoiled gradient-echo (T1SGRE) and ultra-short echo time (UTE) MRI sequences for the detection and assessment of vertebral fractures and degenerative bone changes compared with conventional CT. Methods Fractures (n = 44) and degenerative changes (n = 60 spinal segments) were evaluated in 30 patients (65 ± 14 years, 18 women) on CT and 3-T MRI, including CT-like images derived from T1SGRE and UTE. Two radiologists evaluated morphological features on both modalities: Genant and AO/Magerl classifications, anterior/posterior vertebral height, fracture age; disc height, neuroforaminal diameter, grades of spondylolisthesis, osteophytes, sclerosis, and facet joint degeneration. Diagnostic accuracy and agreement between MRI and CT and between radiologists were assessed using crosstabs, weighted κ, and intraclass correlation coefficients. Image quality was graded on a Likert scale. Results For fracture detection, sensitivity, specificity, and accuracy were 0.95, 0.98, and 0.97 for T1SGRE and 0.91, 0.96, and 0.95 for UTE. Agreement between T1SGRE and CT was substantial to excellent (e.g., Genant: κ, 0.92 [95% confidence interval, 0.83–1.00]; AO/Magerl: κ, 0.90 [0.76–1.00]; osteophytes: κ, 0.91 [0.82–1.00]; sclerosis: κ, 0.68 [0.48–0.88]; spondylolisthesis: ICCs, 0.99 [0.99–1.00]). Agreement between UTE and CT was lower, ranging from moderate (e.g., sclerosis: κ, 0.43 [0.26–0.60]) to excellent (spondylolisthesis: ICC, 0.99 [0.99–1.00]). Inter-reader agreement was substantial to excellent (0.52–1.00), respectively, for all parameters. Median image quality of T1SGRE was rated significantly higher than that of UTE (p < 0.001). Conclusions Morphologic assessment of bone pathologies of the spine using MRI was feasible and comparable to CT, with T1SGRE being more robust than UTE. Key Points • Vertebral fractures and degenerative bone changes can be assessed on CT-like MR images, with 3D T1w spoiled gradient-echo–based images showing a high diagnostic accuracy and agreement with CT. • This could enable MRI to precisely assess bone morphology, and 3D T1SGRE MRI sequences may substitute additional spinal CT examinations in the future. • Image quality and robustness of T1SGRE sequences are higher than those of UTE MRI for the assessment of bone structures.

MR-derived CT-like Images for the Assessment of Acute Vertebral Fractures and Osseous Degenerative Changes in the Thoracolumbar Spine

2020 ◽  
Author(s):  
Benedikt J. Schwaiger ◽  
Charlotte Schneider ◽  
Sophia Kronthaler ◽  
Christoph Böhm ◽  
Julian Zapf ◽  
...  
Keyword(s):  
Vertebral Fractures ◽  
Thoracolumbar Spine ◽  
Degenerative Changes

scholarly journals Ultra-short echo-time MRI detects changes in bone mineralization and water content in OVX rat bone in response to alendronate treatment

Bone ◽  
2010 ◽  
Vol 46 (5) ◽  
pp. 1391-1399 ◽  
Author(s):  
S. Anumula ◽  
S.L. Wehrli ◽  
J. Magland ◽  
A.C. Wright ◽  
F.W. Wehrli
Keyword(s):  
Water Content ◽  
Bone Mineralization ◽  
Alendronate Treatment ◽  
Echo Time ◽  
Short Echo Time ◽  
Rat Bone

Subclavian MR Arteriography: Reduction of Susceptibility Artifact with Short Echo Time and Dilute Gadopentetate Dimeglumine

Radiology ◽  
2000 ◽  
Vol 217 (2) ◽  
pp. 581-586 ◽  
Author(s):  
Mohammed A. Neimatallah ◽  
Thomas L. Chenevert ◽  
Ruth C. Carlos ◽  
Frank J. Londy ◽  
Qian Dong ◽  
...  
Keyword(s):  
Gadopentetate Dimeglumine ◽  
Susceptibility Artifact ◽  
Echo Time ◽  
Short Echo Time

Saddle coil design for short echo time 23 NA MRI

1986 ◽  
Vol 4 (2) ◽  
pp. 171
Author(s):  
Peter M. Joseph ◽  
Ronald M. Summers
Keyword(s):  
Coil Design ◽  
Saddle Coil ◽  
Echo Time ◽  
Short Echo Time

Whole body sodium MRI at 3T using an asymmetric birdcage resonator and short echo time sequence: first images of a male volunteer

2012 ◽  
Vol 57 (14) ◽  
pp. 4555-4567 ◽  
Author(s):  
Friedrich Wetterling ◽  
Dominique M Corteville ◽  
Raffi Kalayciyan ◽  
Andreas Rennings ◽  
Simon Konstandin ◽  
...  
Keyword(s):  
Male Volunteer ◽  
Time Sequence ◽  
Whole Body ◽  
Sodium Mri ◽  
Body Sodium ◽  
Echo Time ◽  
Short Echo Time ◽  
Birdcage Resonator

In vitro imaging of kidney stones using ultra-short echo-time magnetic resonance

2015 ◽  
Author(s):  
El-Sayed Ibrahim ◽  
Robert Pooley ◽  
Joseph Cernigliaro ◽  
Mellena Bridges ◽  
Jamie Giesbrandt ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Kidney Stones ◽  
Echo Time ◽  
Short Echo Time

Short Echo Time Proton MR Spectroscopic Imaging

1993 ◽  
Vol 17 (1) ◽  
pp. 1-14 ◽  
Author(s):  
Stefan Posse ◽  
Bernhard Schuknecht ◽  
Mary E. Smith ◽  
Peter C. M. van Zijl ◽  
Norbert Herschkowitz ◽  
...  
Keyword(s):  
Spectroscopic Imaging ◽  
Echo Time ◽  
Short Echo Time ◽  
Mr Spectroscopic Imaging
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