Magnetic Resonance T 2 * Is Increased in Patients With Early‐Stage Achilles and Patellar Tendinopathy

2021 ◽  
Author(s):  
Nikolaj M. Malmgaard‐Clausen ◽  
Peter Tran ◽  
Rene B. Svensson ◽  
Philip Hansen ◽  
Janus D. Nybing ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Early Stage ◽  
Patellar Tendinopathy

Early-stage cervical cancer: Tumor delineation by magnetic resonance imaging and ultrasound — A European multicenter trial

2013 ◽  
Vol 128 (3) ◽  
pp. 449-453 ◽  
Author(s):  
Elisabeth Epstein ◽  
Antonia Testa ◽  
Adrius Gaurilcikas ◽  
Alessia Di Legge ◽  
Liveke Ameye ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Cervical Cancer ◽  
Magnetic Resonance ◽  
Early Stage ◽  
Multicenter Trial ◽  
Resonance Imaging ◽  
Tumor Delineation ◽  
Early Stage Cervical Cancer ◽  
Cancer Tumor

scholarly journals Magnetic Resonance Imaging for Surveillance of Hepatocellular Carcinoma: A Systematic Review and Meta-Analysis

Diagnostics ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1665
Author(s):  
Dong Hwan Kim ◽  
Sang Hyun Choi ◽  
Ju Hyun Shim ◽  
So Yeon Kim ◽  
Seung Soo Lee ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Hepatocellular Carcinoma ◽  
Magnetic Resonance ◽  
Sensitivity And Specificity ◽  
Diagnostic Performance ◽  
Early Stage ◽  
Meta Analysis ◽  
Random Effects Model ◽  
Resonance Imaging ◽  
Meta Regression

Our meta-analysis aimed to evaluate the diagnostic performance of surveillance magnetic resonance imaging (sMRI) for detecting hepatocellular carcinoma (HCC), and to compare the diagnostic performance of sMRI between different protocols. Original articles about the diagnostic accuracy of sMRI for detecting HCC were found in major databases. The meta-analytic pooled sensitivity and specificity of sMRI for detecting HCC were determined using a bivariate random effects model. The pooled sensitivity and specificity of full MRI and abbreviated MRI protocols were compared using bivariate meta-regression. In the total seven included studies (1830 patients), the pooled sensitivity of sMRI for any-stage HCC and very early-stage HCC were 85% (95% confidence interval, 79–90%; I2 = 0%) and 77% (66–85%; I2 = 32%), respectively. The pooled specificity for any-stage HCC and very early-stage HCC were 94% (90–97%; I2 = 94%) and 94% (88–97%; I2 = 96%), respectively. The pooled sensitivity and specificity of abbreviated MRI protocols were 87% (80–94%) and 94% (90–98%), values that were comparable with those of full MRI protocols (84% [76–91%] and 94% [89–99%]; p = 0.83). In conclusion, sMRI had good sensitivity for detecting HCC, particularly very early-stage HCC. Abbreviated MRI protocols for HCC surveillance had comparable diagnostic performance to full MRI protocols.

MRI/MRS of corpus callosum in patients with clinically isolated syndrome suggestive of multiple sclerosis

2003 ◽  
Vol 9 (6) ◽  
pp. 554-565 ◽  
Author(s):  
J P Ranjeva ◽  
J Pelletier ◽  
S Confort-Gouny ◽  
D Ibarrola ◽  
B Audoin ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Magnetic Resonance ◽  
Corpus Callosum ◽  
Early Stage ◽  
Magnetization Transfer ◽  
Mean Diffusivity ◽  
Clinically Isolated Syndrome ◽  
Resonance Spectroscopy ◽  
Magnetization Transfer Ratio ◽  
R Ratio

A trophy of corpus callosum (C C) related to axonal loss has previously been observed in patients at the early stage of clinically definite multiple sclerosis (CDMS). Atrophy increases with the progression of the disease. Nevertheless, no data concerning the onset of atrophy of C C are currently available. The purpose of this study is to determine if damage in callosal tissue was present at the earliest stage of MS, in a subgroup of patients presenting with a clinically isolated syndrome suggestive of MS (C ISSMS), fulfilling the dissemination in space criteria according to McDonald. Magnetic resonance imaging (MRI) and magnetic resonance spectroscopy (MRS) techniques were applied to measure C C volume, magnetization transfer ratio (MTR), mean diffusivity (MD), N-acetyl aspartate/choline-containing compounds (NAA/C ho) ratio, N-acetyl aspartate/total creatine (NA A/C r) ratio and C ho/C r ratio inside the C C of 46 C ISSMS patients and 24 sexand age-matched controls. No atrophy of C C was observed in the C ISSMS group. C C of patients was character ized by decreased MTR and increased MD. No change in the NA A/C r ratio was observed while the NA A/C ho ratio decreased and C ho/C r ratio increased in the splenium and the central anterio r part of C C. These abnormalities were present in patients with, but also without, macroscopic lesions inside the C C. O ur results indicate that diffuse structural and metabolic changes, which may be interpreted as representing predominantly myelin patho logy, occur in the C C at the earliest stage of MS before any atrophy is detected.

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