scholarly journals Modeling of Look-Locker estimates of the magnetic resonance imaging estimate of longitudinal relaxation rate in tissue after contrast administration

2011 ◽  
Vol 66 (5) ◽  
pp. 1432-1444 ◽  
Author(s):  
Ramesh Paudyal ◽  
Hassan Bagher-Ebadian ◽  
Tavarekere N. Nagaraja ◽  
Joseph D. Fenstermacher ◽  
James. R. Ewing
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Relaxation Rate ◽  
Resonance Imaging ◽  
Contrast Administration ◽  
Longitudinal Relaxation Rate ◽  
Longitudinal Relaxation

scholarly journals Diagnostic value of gadolinium contrast administration for spinal cord magnetic resonance imaging in multiple sclerosis patients and correlative markers of lesion enhancement

2021 ◽  
Vol 7 (4) ◽  
pp. 205521732110479
Author(s):  
Kianush Karimian-Jazi ◽  
Ulf Neuberger ◽  
Katharina Schregel ◽  
Gianluca Brugnara ◽  
Martin Bendszus ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Multiple Sclerosis ◽  
Magnetic Resonance ◽  
Diagnostic Value ◽  
Resonance Imaging ◽  
Gadolinium Contrast ◽  
Contrast Administration ◽  
Signal Ratio ◽  
Spine Magnetic Resonance Imaging

Background Magnetic resonance imaging is essential for monitoring people with multiple sclerosis, but the diagnostic value of gadolinium contrast administration in spine magnetic resonance imaging is unclear. Objective To assess the diagnostic value of gadolinium contrast administration in spine magnetic resonance imaging follow-up examinations and identify imaging markers correlating with lesion enhancement. Methods A total of 65 multiple sclerosis patients with at least 2 spinal magnetic resonance imaging follow-up examinations were included. Spine magnetic resonance imaging was performed at 3 Tesla with a standardized protocol (sagittal and axial T2-weighted turbo spin echo and T1-weighted post-contrast sequences). T2 lesion load and enhancing lesions were assessed by two independent neuroradiologists for lesion size, localization, and T2 signal ratio (T2 signallesion/T2 signalnormal appearing spinal cord). Results A total of 68 new spinal T2 lesions and 20 new contrast-enhancing lesions developed during follow-up. All enhancing lesions had a discernable correlate as a new T2 lesion. Lesion enhancement correlated with a higher T2 signal ratio compared to non-enhancing lesions (T2 signal ratio: 2.0 ± 0.4 vs. 1.4 ± 0.2, **** p < 0.001). Receiver operating characteristics analysis showed an optimal cutoff value of signal ratio 1.78 to predict lesion enhancement (82% sensitivity and 97% specificity). Conclusion Gadolinium contrast administration is dispensable in follow-up spine magnetic resonance imaging if no new T2 lesions are present. Probability of enhancement correlates with the T2 signal ratio.

scholarly journals Investigation of Transverse Relaxation Rate Distribution via Magnetic Resonance Imaging: Impact of Electrode Formation

2020 ◽  
pp. 2000579
Author(s):  
Roland Balbierer ◽  
Philipp Seegert ◽  
Sabrina Herberger ◽  
Thomas Wetzel ◽  
Hermann Nirschl ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Relaxation Rate ◽  
Transverse Relaxation Rate ◽  
Resonance Imaging ◽  
Transverse Relaxation ◽  
Rate Distribution

Black TiO2-based nanoprobes for T1-weighted MRI-guided photothermal therapy in CD133 high expressed pancreatic cancer stem-like cells

2018 ◽  
Vol 6 (8) ◽  
pp. 2209-2218 ◽  
Author(s):  
Siqi Wang ◽  
Wenzhi Ren ◽  
Jianhua Wang ◽  
Zhenqi Jiang ◽  
Madiha Saeed ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Pancreatic Cancer ◽  
Magnetic Resonance ◽  
Relaxation Rate ◽  
Photothermal Therapy ◽  
Resonance Imaging ◽  
Black Tio2 ◽  
New Type ◽  
Mri Guided

New type of black TiO2 nanoprobes with high long relaxation rate and significant targeting capability were prepared for magnetic resonance imaging guided photothermal therapy in pancreatic stem-like cells.

scholarly journals Equivalent cross-relaxation rate in magnetic resonance imaging

2001 ◽  
Vol 41 (supplement) ◽  
pp. S186
Author(s):  
S. Matsushima ◽  
S. Era ◽  
M. Sogami ◽  
Y. Kinosada ◽  
H. Oosaki ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Relaxation Rate ◽  
Cross Relaxation ◽  
Resonance Imaging

A Longitudinal Study of R2* and R2 Magnetic Resonance Imaging Relaxation Rate Measurements in Murine Liver After a Single Administration of 3 Different Iron Oxide-Based Contrast Agents

2005 ◽  
Vol 40 (12) ◽  
pp. 784-791 ◽  
Author(s):  
Tammy L. Kalber ◽  
Christopher J. Smith ◽  
Franklyn A. Howe ◽  
John R. Griffiths ◽  
Anderson J. Ryan ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Longitudinal Study ◽  
Iron Oxide ◽  
Magnetic Resonance ◽  
Contrast Agents ◽  
Relaxation Rate ◽  
Single Administration ◽  
Resonance Imaging ◽  
Murine Liver
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