Bilateral hip imaging at 7 Tesla using a multi-channel transmit technology: initial results presenting anatomical detail in healthy volunteers and pathological changes in patients with avascular necrosis of the femoral head

Theysohn, JM; Kraff, Oliver; Orzada, Stephan; Theysohn, Nina; Claßen, Tim; Landgraeber, Stefan; Ladd, Mark E.; Lauenstein, TC

doi:10.1007/s00256-013-1698-0

Cited by 29 publications

(22 citation statements)

References 30 publications

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“…2) 65,[71][72][73][74][75][76][77][78] . Radiographs are commonly made, and frog-leg lateral radiographs are especially useful to identify collapse (Figs.…”

Section: Diagnosis Prognosis and Decision-makingmentioning

confidence: 99%

Nontraumatic Osteonecrosis of the Femoral Head: Where Do We Stand Today?

Mont

Cherian

Sierra

et al. 2015

The Journal of Bone and Joint Surgery

440

436

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➤ Although multiple theories have been proposed, no one pathophysiologic mechanism has been identified as the etiology for the development of osteonecrosis of the femoral head. However, the basic mechanism involves impaired circulation to a specific area that ultimately becomes necrotic.➤ A variety of nonoperative treatment regimens have been evaluated for the treatment of precollapse disease, with varying success. Prospective, multicenter, randomized trials are needed to evaluate the efficacy of these regimens in altering the natural history of the disease.➤ Joint-preserving procedures are indicated in the treatment of precollapse disease, with several studies showing successful outcomes at mid-term and long-term follow-up.➤ Studies of total joint arthroplasty, once femoral head collapse is present, have described excellent outcomes at greater than ten years of follow-up, which is a major advance and has led to a paradigm shift in treating these patients.➤ The results of hemiresurfacing and total resurfacing arthroplasty have been suboptimal, and these procedures have restricted indications in patients with osteonecrosis of the femoral head.

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“…2) 65,[71][72][73][74][75][76][77][78] . Radiographs are commonly made, and frog-leg lateral radiographs are especially useful to identify collapse (Figs.…”

Section: Diagnosis Prognosis and Decision-makingmentioning

confidence: 99%

Nontraumatic Osteonecrosis of the Femoral Head: Where Do We Stand Today?

Mont

Cherian

Sierra

et al. 2015

The Journal of Bone and Joint Surgery

440

436

View full text Add to dashboard Cite

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“…With kind permission from Springer Science and Business Media. Reproduced from Theysohn JM et al, Skeletal Radiol 2013;42:1555–1563 .…”

Section: Whole‐body Imagingmentioning

confidence: 99%

MRI at 7 tesla and above: Demonstrated and potential capabilities

Kraff

Fischer

Nagel

et al. 2014

Magnetic Resonance Imaging

166

158

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With more than 40 installed MR systems worldwide operating at 7 Tesla or higher, ultra-high-field (UHF) imaging has been established as a platform for clinically oriented research in recent years. Along with technical developments that, in part, have also been successfully transferred to lower field strengths, MR imaging and spectroscopy at UHF have demonstrated capabilities and potentials for clinical diagnostics in a variety of studies. In terms of applications, this overview article focuses on already achieved advantages for in vivo imaging, i.e., in imaging the brain and joints of the musculoskeletal system, but also considers developments in body imaging, which is particularly challenging. Furthermore, new applications for clinical diagnostics such as X-nuclei imaging and spectroscopy, which only really become feasible at ultra-high magnetic fields, will be presented.

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“…However, further research is needed to discover the full potential of this technique which could be applied in pre-collapse stages. In two different papers, Theysohn et al(55,56) analyzed 7T advantages and compared it to 3T magnets. Images obtained using a home-made coil, were judged according to a 4 point scale.…”

mentioning

confidence: 99%

The role of imaging in diagnosis and management of femoral head avascular necrosis

Manenti

Altobelli

Pugliese

et al. 2015

ccmbm

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SummaryThe aim of this paper is to critically review the literature documenting the imaging approach in adult Femoral Head Avascular Necrosis (FHAVN). For this purpose we described and evaluated different radiological techniques, such as X-ray, Computed Tomography (CT), Magnetic Resonance Imaging (MRI), and Nuclear Medicine. Plain films are considered the first line imaging technique due to its ability to depict femoral head morphological changes, to its low costs and high availability. CT is not a routinely performed technique, but is useful to rule out the presence of a subchondral fracture when MRI is doubtful or contraindicated. MRI is unanimously considered the gold standard technique in the early stages, being capable to detect bone marrow changes such as edema and sclerosis. It may be useful also to guide treatment and, as CT, it is a validated technique in follow-up of patients with FHAVN. Nuclear medicine imaging is mostly applied in post-operative period to detect graft viability or infective complications. More advanced techniques may be useful in particular conditions but still need to be validated; thus new research trials are desirable. In conclusion, X-ray examination is the first line approach, but lacks of sensitivity in early stage whereas MRI is indicated. CT easily depicts late stage deformation and may decrease MRI false positive results in detecting the subchondral fracture. However, the role of both Nuclear Medicine Imaging and advanced MR techniques in FHAVN still need to be investigated.

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Bilateral hip imaging at 7 Tesla using a multi-channel transmit technology: initial results presenting anatomical detail in healthy volunteers and pathological changes in patients with avascular necrosis of the femoral head

Cited by 29 publications

References 30 publications

Nontraumatic Osteonecrosis of the Femoral Head: Where Do We Stand Today?

Nontraumatic Osteonecrosis of the Femoral Head: Where Do We Stand Today?

MRI at 7 tesla and above: Demonstrated and potential capabilities

The role of imaging in diagnosis and management of femoral head avascular necrosis

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