7 Tesla quantitative hip MRI: a comparison between TESS and CPMG for T2 mapping

Kraff, Oliver; Lazik-Palm, Andrea; Heule, Rahel; Theysohn, Jens; Bieri, Oliver; Quick, Harald H.

doi:10.1007/s10334-016-0557-0

Cited by 15 publications

(12 citation statements)

References 22 publications

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“…T2 and T2* mapping of hip cartilage at lower field strengths (1.5 and 3 Tesla) is confounded by the very thin cartilage surfaces on the femoral head and acetabulum, leading to partial volume effects from surrounding tissues. They were able to achieve higher resolution (5 slices at 0.5 mm × 0.5 mm in plane resolution with 2.5 mm thick slices) than previous studies at 3 Tesla in clinically reasonable scan times at 7 Tesla (under 5 minutes for the T2 map, T2* maps in under 2 minutes), and found that the increased resolution gained by going to 7 Tesla was essential to mitigate partial volume contamination (11,12). This had the advantage of lowering SAR (lower tissue heating), and allows higher resolutions and/or increased volume coverage in a true 3D scan.…”

Section: T2 and T2* Mappingmentioning

confidence: 85%

Quantitative techniques for musculoskeletal MRI at 7 Tesla

Bangerter

Taylor

Tarbox

et al. 2016

Quant. Imaging Med. Surg.

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Whole-body 7 Tesla MRI scanners have been approved solely for research since they appeared on the market over 10 years ago, but may soon be approved for selected clinical neurological and musculoskeletal applications in both the EU and the United States. There has been considerable research work on musculoskeletal applications at 7 Tesla over the past decade, including techniques for ultra-high resolution morphological imaging, 3D T2 and T2* mapping, ultra-short TE applications, diffusion tensor imaging of cartilage, and several techniques for assessing proteoglycan content in cartilage. Most of this work has been done in the knee or other extremities, due to technical difficulties associated with scanning areas such as the hip and torso at 7 Tesla. In this manuscript, we first provide some technical context for 7 Tesla imaging, including challenges and potential advantages. We then review the major quantitative MRI techniques being applied to musculoskeletal applications on 7 Tesla whole-body systems.

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Section: T2 and T2* Mappingmentioning

confidence: 85%

Quantitative techniques for musculoskeletal MRI at 7 Tesla

Bangerter

Taylor

Tarbox

et al. 2016

Quant. Imaging Med. Surg.

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“…Notably, TESS systematically provided lower cartilage T2 values compared to MESE. The overestimation of T2 values obtained with MESE technique was assumed to be related to the stimulated echo contamination due to imperfect refocusing pulses in MESE acquisitions [ 21 , 22 ]. In Table 2 , a summary of the mean T2 values obtained for the cartilage are displayed, showing the variations between different anatomical districts and different T2 mapping techniques [ 26 ].…”

Section: Cartilagementioning

confidence: 99%

Musculoskeletal MRI at 7 T: do we need more or is it more than enough?

Aringhieri

Zampa

Tosetti³

2020

Eur Radiol Exp

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Ultra-high field magnetic resonance imaging (UHF-MRI) provides important diagnostic improvements in musculoskeletal imaging. The higher signal-to-noise ratio leads to higher spatial and temporal resolution which results in improved anatomic detail and higher diagnostic confidence. Several methods, such as T2, T2*, T1rho mapping, delayed gadolinium-enhanced, diffusion, chemical exchange saturation transfer, and magnetisation transfer techniques, permit a better tissue characterisation. Furthermore, UHF-MRI enables in vivo measurements by low-γ nuclei ( 23 Na, 31 P, 13 C, and 39 K) and the evaluation of different tissue metabolic pathways. European Union and Food and Drug Administration approvals for clinical imaging at UHF have been the first step towards a more routinely use of this technology, but some drawbacks are still present limiting its widespread clinical application. This review aims to provide a clinically oriented overview about the application of UHF-MRI in the different anatomical districts and tissues of musculoskeletal system and its pros and cons. Further studies are needed to consolidate the added value of the use of UHF-MRI in the routine clinical practice and promising efforts in technology development are already in progress.

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“…Musculoskeletal UHF MRI of the hip joints has only recently become accessible at 7T through development of new RF coil technology and RF shimming techniques . Building on these initial studies, a couple of studies have now used the identical hardware setup to perform quantitative MRI of the hip joint employing T 1 , T 2 , and