An Accurate Estimation of T2* Mapping for Fast Magnetic Resonance Imaging

2019 ◽  
Author(s):  
Jie Yang ◽  
Zhicheng Zhang ◽  
Yanchun Zhu ◽  
Yaoqin Xie
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
T2 Mapping ◽  
Accurate Estimation ◽  
Resonance Imaging ◽  
Fast Magnetic Resonance Imaging

AB1098 STRUCTURAL ELEMENTS OF THE KNEE ENTHESES ASSESSED IN HEALTHY SUBJECTS WITH ULTRA HIGH FIELD MRI (150 MICRONS).

2020 ◽  
Vol 79 (Suppl 1) ◽  
pp. 1838-1838
Author(s):  
D. Roche ◽  
C. Michel ◽  
P. Daudé ◽  
A. Le Troter ◽  
C. Chagnaud ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Healthy Subjects ◽  
High Field ◽  
T2 Mapping ◽  
Pulse Sequences ◽  
Structural Elements ◽  
Resonance Imaging ◽  
Ultra High Field ◽  
Mineralized Zone

Background:Fibrocartilaginous enthesis is composed of different histological zones which are commonly referred to the tendon distal extremity (a lamellar tissue with a low cell density, collagen and connective tissue), the fibrocartilaginous zone (with chondrocytes), a progressively mineralized zone and the bone. The MRI visualization of the water content of entheses is challenging given the very short relation time so that entheses has been very poorly assessed using MRI (1).Objectives:The main objective of the study was to assess the structural elements of the knee enthesis based on the quantitative T2* measurements using Ultra High Field (UHF) MRI.Methods:Twelve healthy subjects without any osteoarticular pathology were included in the study after they provided their informed consent. 3D gradient echo sequence with a 4.3 ms echo time and T2* mapping were performed. The lateral internal, external and crossed ligaments, patellar and quadricipital tendons were assessed. T2* measurements were performed specifically on the quadricipital tendon.Results:The quadricipital tendon and the bone trabeculation could be visualized on the UHF MR image. The T2* mapping analysis illustrated a large value (16.4 ± 4 ms) for the subchondral bone and much lower values for the trabecular bone (11 ± 4.5 ms) and the different zones of the keen entheses (7.7 ± 1.9 ms).Conclusion:Based on T2* measurements performed using UHF MRI, the different structural elements of the knee entheses were distinguished. This quantitative stratification could be used to assess changes in pathological conditions such as SpA and trauma.References:[1]Benjamin M, Bydder GM. Magnetic resonance imaging of entheses using ultrashort TE (UTE) pulse sequences. Journal of magnetic resonance imaging: JMRI. 2007;25(2):381-9.Disclosure of Interests:None declared

scholarly journals ORAL AB II QUICK FIRE BASIC1393Validation of aortic in-vitro strain measurement by Magnetic Resonance Imaging with realistic abdominal aortic aneurism phantom1474A novel method of Segment Length Tracking providing regional strain measures from standard CMR cine images in CRT candidates1623T1 mapping can quantify the area-at-risk and infarct size – no need for T2 mapping or conventional LGE imaging in acute STEMI at 1.5T1373Reliability and reproducibility of trans-valvular flow measurement by 4D flow magnetic resonance imaging in acute myocardial infarct patients: two centre study1588Insights into hypertensive heart disease phenotypes: spectrum of myocyte, interstitial and vascular changes by cardiovascular MRI1412Myocardial partition coefficient of gadolinium: A comparison between patients with acute myocarditis, chronic infarction and healthy volunteers1386A comparison of circumferential strain results from multiple software packages in healthy subjects

2016 ◽  
Vol 17 (suppl 1) ◽  
pp. i10-i13
Author(s):  
Yufei Wang ◽  
A Zweerink ◽  
Heerajnarain Bulluck ◽  
P. Garg ◽  
Jonathan C L Rodrigues ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Acute Myocarditis ◽  
Myocardial Infarct ◽  
T2 Mapping ◽  
Hypertensive Heart Disease ◽  
Segment Length ◽  
Resonance Imaging ◽  
4D Flow ◽  
Acute Myocardial Infarct

Parametric methods for characterizing myocardial tissue by magnetic resonance imaging (part 2): T2 mapping

2015 ◽  
Vol 57 (6) ◽  
pp. 471-479
Author(s):  
R.J. Perea Palazón ◽  
M. Solé Arqués ◽  
S. Prat González ◽  
T.M. de Caralt Robira ◽  
M.T. Cibeira López ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
T2 Mapping ◽  
Myocardial Tissue ◽  
Parametric Methods ◽  
Resonance Imaging

Fast magnetic resonance imaging of intracerebral metastatic disease

1988 ◽  
Vol 61 (731) ◽  
pp. 1002-1008 ◽  
Author(s):  
Michael P. Williams ◽  
Graham R. Cherryman ◽  
Janet E. Husband ◽  
Christine W. Heron
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Metastatic Disease ◽  
Resonance Imaging ◽  
Fast Magnetic Resonance Imaging

Magnetic Resonance Imaging T2 Values of Stifle Articular Cartilage in Normal Beagles

2018 ◽  
Vol 31 (02) ◽  
pp. 108-113 ◽  
Author(s):  
Kei Hayashi ◽  
Brian Caserto ◽  
Mary Norman ◽  
Hollis Potter ◽  
Matthew Koff ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Articular Cartilage ◽  
Magnetic Resonance ◽  
Regional Differences ◽  
T2 Mapping ◽  
Resonance Imaging ◽  
Condylar Cartilage ◽  
Tibial Cartilage ◽  
Stifle Joint ◽  
Canine Stifle

Objectives The purpose of this study was to evaluate regional differences of canine stifle articular cartilage using the quantitative magnetic resonance imaging (MRI) technique of T2 mapping. Methods Fourteen stifle joints from seven juvenile male Beagle dogs with no evidence or prior history of pelvic limb lameness were imaged ex vivo using standard of care fast spin echo MRI and quantitative T2 mapping protocols. Regions of interest were compared between the femoral, patellar and tibial cartilages, as well as between the lateral and medial femorotibial compartments. Limbs were processed for histology with standard stains to confirm normal cartilage. Results The average T2 value of femoral trochlear cartilage (37.5 ± 2.3 ms) was significantly prolonged (p < 0.0001) as compared with the femoral condylar, patellar and tibial condylar cartilages (33.1 ± 1.5 ms, 32.8 ± 2.3 ms, and 28.0 ± 1.7 ms, respectively). When comparing medial and lateral condylar compartments, the lateral femoral condylar cartilage had the longest T2 values (34.8 ± 2.8 ms), as compared with the medial femoral condylar cartilage (30.9 ± 1.9 ms) and lateral tibial cartilage (29.1 ± 2.3 ms), while the medial tibial cartilage had the shortest T2 values (26.7 ± 2.4 ms). Clinical Significance As seen in other species, regional differences in T2 values of the canine stifle joint are identified. Understanding normal regions of anticipated prolongation in different joint compartments is needed when using quantitative imaging in models of canine osteoarthritis.

scholarly journals Relationship Between Magnetic Resonance T2-Mapping and Matrix Metalloproteinase 1,3 in Knee Osteoarthritis

2020 ◽  
Author(s):  
Lei Shi ◽  
Kexin Wang ◽  
Jinghong Yu ◽  
Mingkai Li ◽  
Guangmei Men ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Matrix Metalloproteinase ◽  
Knee Osteoarthritis ◽  
T2 Mapping ◽  
Cartilage Degeneration ◽  
Pathological Examination ◽  
Lesion Group ◽  
Control Group ◽  
Resonance Imaging

Abstract Objective To investigate the relationship between quantitative analysis of MRI (T2-mapping) and the expression of matrix metalloproteinase (MMP-1, MMP-3) in osteoarthritis of the knee joint and the role of MMP-1,3 in the pathogenesis of osteoarthritis. Methods Thirty cases of knee osteoarthritis (KOA) patients with total knee arthroplasty (TKA) (lesion group) and 30 healthy adult volunteers (control group) were scanned with 1.5 T routine MR and T2-mapping, and their T2 values were measured and statistically analyzed. The pathological examination of the knee cartilage that was replaced during the operation and the immunohistochemical assay were used to measure the expression of MMP-1,3. The correlation between the T2 value of magnetic resonance imaging and the expression of MMP-1,3 was analyzed. Results (1) According to the Recht grading standard for magnetic resonance, the T2 value of magnetic resonance increased significantly with the increase of cartilage degeneration. The differences in T2 values between each level and the normal group were statistically significant (P  < 0.05). (2) The T2 value of magnetic resonance imaging increased with the severity of the cartilage degeneration pathological Mankin grading, and the difference was statistically significant (P  <  0.05). (3) The expression of MMP-1,3 increased with cartilage degeneration. (4) The T2 value and the expression of MMP-1 in cartilage showed a linear trend. The result of Spearman correlation analysis showed that the expression of MMP-1,3 increased as the cartilage T2 value increased. There was a positive linear correlation between the two. Conclusion The T2 value of magnetic resonance increased with the degeneration of KOA cartilage. The expression of MMP-1,3 increased with the severity of articular cartilage destruction. The T2 value of KOA magnetic resonance was positively correlated with the expression of MMP-1,3.

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