Ökonomische Aspekte der Niederfeld-Magnetresonanztomographie

Vosshenrich, Jan; Breit, Hanns‐Christian; Bach, Michael; Merkle, Elmar M.

doi:10.1007/s00117-022-00986-9

Cited by 28 publications

(18 citation statements)

References 10 publications

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“…Economic considerations for MRI scanners include purchase price, shipping and transportation, installation and site construction, coils and software licenses, and maintenance. 11 Modern low-field MRI systems benefit from the cryogen-free "dry" superconducting magnet technology. Unlike conventional "wet" magnets in which the superconducting magnet coils are cooled by hundreds of liters of liquid helium, cooling in modern low-field systems is enhanced by direct conduction from a cryogenic unit that contains only 0.7 L of well-sealed liquid helium and requires no quench pipe.…”

Section: Modern Low-field Musculoskeletal Mri: Practice Consideration...mentioning

confidence: 99%

“…An analysis at the University of Basel compared the total cost of ownership for a commercially available 0.55 T MRI scanner (MAGNETOM Free.Max, Siemens Healthcare GmbH) with commercially available 1.5 and 3.0 T MRI systems. 11 Compared with a 1.5 T MRI scanner with comparable software and coils, their 0.55 T system was 40% to 50% cheaper. The installation and site construction costs of the 0.55 T MRI scanner were 40% to 70% of the cost of higher-field MRI scanners.…”

Section: Modern Low-field Musculoskeletal Mri: Practice Consideration...mentioning

confidence: 99%

“…Economic considerations for MRI scanners include purchase price, shipping and transportation, installation and site construction, coils and software licenses, and maintenance 11 …”

Section: Modern Low-field Musculoskeletal Mri: Practice Considerationsmentioning

confidence: 99%

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Modern Low-Field MRI of the Musculoskeletal System

Khodarahmi

Keerthivasan²,

Brinkmann³

et al. 2022

Invest Radiol

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Magnetic resonance imaging (MRI) provides essential information for diagnosing and treating musculoskeletal disorders. Although most musculoskeletal MRI examinations are performed at 1.5 and 3.0 T, modern low-field MRI systems offer new opportunities for affordable MRI worldwide. In 2021, a 0.55 T modern low-field, whole-body MRI system with an 80-cm-wide bore was introduced for clinical use in the United States and Europe. Compared with current higher-field-strength MRI systems, the 0.55 T MRI system has a lower total ownership cost, including purchase price, installation, and maintenance. Although signal-to-noise ratios scale with field strength, modern signal transmission and receiver chains improve signal yield compared with older low-field magnetic resonance scanner generations. Advanced radiofrequency coils permit short echo spacing and overall compacter echo trains than previously possible. Deep learning-based advanced image reconstruction algorithms provide substantial improvements in perceived signal-to-noise ratios, contrast, and spatial resolution. Musculoskeletal tissue contrast evolutions behave differently at 0.55 T, which requires careful consideration when designing pulse sequences. Similar to other field strengths, parallel imaging and simultaneous multislice acquisition techniques are vital for efficient musculoskeletal MRI acquisitions. Pliable receiver coils with a more cost-effective design offer a path to more affordable surface coils and improve image quality. Whereas fat suppression is inherently more challenging at lower field strengths, chemical shift selective fat suppression is reliable and homogeneous with modern low-field MRI technology. Dixon-based gradient echo pulse sequences provide efficient and reliable multicontrast options, including postcontrast MRI. Metal artifact reduction MRI benefits substantially from the lower field strength, including slice encoding for metal artifact correction for effective metal artifact reduction of high-susceptibility metallic implants. Wide-bore scanner designs offer exciting opportunities for interventional MRI. This review provides an overview of the economical aspects, signal and image quality considerations, technological components and coils, musculoskeletal tissue relaxation times, and image contrast of modern low-field MRI and discusses the mainstream and new applications, challenges, and opportunities of musculoskeletal MRI.

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Section: Modern Low-field Musculoskeletal Mri: Practice Consideration...mentioning

confidence: 99%

Section: Modern Low-field Musculoskeletal Mri: Practice Consideration...mentioning

confidence: 99%

See 1 more Smart Citation

Modern Low-Field MRI of the Musculoskeletal System

Khodarahmi

Keerthivasan²,

Brinkmann³

et al. 2022

Invest Radiol

View full text Add to dashboard Cite

show abstract

“…5,6 A recent study compared costs of a 0.55 T scanner with a 1.5 T scanner and showed substantially reduced purchase prices (40%-50%), as well as installation (up to 70%) and maintenance costs (up to 45%). 7 Hori et al 5 proposed the capability to obtain TOF MRA with comparable image quality to 3 T MRI with a next-generation advanced 0.55 T low-field system, which has yet to be evaluated.…”

mentioning

confidence: 99%

“…Modern cost-efficient and maintenance-efficient low-field MRI systems have the potential to overcome these limitations and can be expected to become more popular, providing worldwide access to high-quality diagnosis of IA 5,6 . A recent study compared costs of a 0.55 T scanner with a 1.5 T scanner and showed substantially reduced purchase prices (40%–50%), as well as installation (up to 70%) and maintenance costs (up to 45%) 7 …”

mentioning

confidence: 99%

Diagnostic Performance of 0.55 T MRI for Intracranial Aneurysm Detection

et al. 2022

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ObjectivesIntracranial aneurysm (IA) is the main cause of subarachnoid hemorrhages. Time-of-flight (TOF) magnetic resonance angiography (MRA) at 1.5 T or 3 T magnetic resonance imaging (MRI) is a well-established method for the diagnosis of IA. The aim of this prospective study was to evaluate the performance of a modern 0.55 T MRI in the diagnosis of IAs in comparison to digital subtraction angiography (DSA) as a standard of reference.Materials and MethodsSeventeen patients with suspicion of single or multiple IAs underwent TOF MRA at 0.55 T MRI 1 day before DSA. Two neuroradiologists independently measured the aneurysm neck, width, and height on 0.55 T, 1.5 T, and 3 T 3D-TOF MRA source images and 2D/3D rotational angiography. The main analysis assessed the intermodality agreement between 0.55 T TOF MRA and DSA using Bland-Altman plots, a Wilcoxon test, and the intraclass correlation coefficient (ICC). In a secondary analysis, aneurysm dimensions were compared between 0.55 T TOF MRA and 1.5/3 T TOF MRA. Interreader agreement was evaluated by ICC. A third neuroradiologist blinded to patient history screened 0.55 T TOF MRA data sets of the aforementioned 17 patients and 15 additional healthy patients for the presence and location of aneurysms.ResultsA total of 19 aneurysms in 16 patients were identified in both 0.55 T MRA and DSA. Measurements of the 2 nonblinded readers showed no significant differences between 0.55 T TOF MRA and DSA in the overall aneurysm size (calculated as the mean from height/width/neck) (P = 0.178), as well as in the mean width (P = 0.778) and neck values (P = 0.190). The mean height was significantly larger in 0.55 T TOF MRA in comparison to DSA (P = 0.020). Intermodality (1.5/3 T TOF MRA) and interrater agreement were excellent (ICC > 0.94). Of the 32 data sets of patients with and without IA, the blinded reader detected all aneurysms correctly by using 0.55 T images.ConclusionsTOF-MRA acquired with a modern 0.55 T MRI is a reliable tool for the detection and initial assessment of IAs.

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Cardiac MRI at Low Field Strengths

Campbell‐Washburn,

Varghese,

Nayak

et al. 2023

Magnetic Resonance Imaging

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Cardiac MR imaging is well established for assessment of cardiovascular structure and function, myocardial scar, quantitative flow, parametric mapping, and myocardial perfusion. Despite the clear evidence supporting the use of cardiac MRI for a wide range of indications, it is underutilized clinically. Recent developments in low‐field MRI technology, including modern data acquisition and image reconstruction methods, are enabling high‐quality low‐field imaging that may improve the cost–benefit ratio for cardiac MRI. Studies to‐date confirm that low‐field MRI offers high measurement concordance and consistent interpretation with clinical imaging for several routine sequences. Moreover, low‐field MRI may enable specific new clinical opportunities for cardiac imaging such as imaging near metal implants, MRI‐guided interventions, combined cardiopulmonary assessment, and imaging of patients with severe obesity. In this review, we discuss the recent progress in low‐field cardiac MRI with a focus on technical developments and early clinical validation studies.Evidence Level5Technical EfficacyStage 1

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Ökonomische Aspekte der Niederfeld-Magnetresonanztomographie

Cited by 28 publications

References 10 publications

Modern Low-Field MRI of the Musculoskeletal System

Modern Low-Field MRI of the Musculoskeletal System

Diagnostic Performance of 0.55 T MRI for Intracranial Aneurysm Detection

Cardiac MRI at Low Field Strengths

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