Abstract
Magnetic resonance imaging (MRI) is currently performed with scanners operating at field strengths ranging from 0.02 to 4.0 T [1–5]. Multiple manufacturers now supply open design MRI systems that operate predominately at field strengths below 0.5 T. Issues regarding field strength remain controversial and largely unresolved. This includes diagnostic yield, imaging sequences, manufacturer variation, diagnostic accuracy, adequacy of image quality, cost effectiveness, and safety [6–16]. In spite of these unresolved issues clinical MR units operating at 0.5 T or below may make up as much as 80% of the systems in use in developed countries, and more than 2000 of these lower field strength systems are operational in the United States. At least six manufacturers offer an array of clinical MR systems below 0.6 T, with the sales of open design systems rapidly increasing. Brain imaging on high-field strength magnets in general provides higher resolution, but such systems are more costly to site, operate, and maintain. Open design low-field strength systems tend to demonstrate higher contrast with slightly less resolution; however, costs for siting, operation, and maintenance are significantly lower. In addition, patient tolerance is often superior to that seen in a high-field environment.
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Keywords
- Field Strength
- Pituitary Adenoma
- Gadopentetate Dimeglumine
- Compute Tomo
- Nuclear Magnetic Resonance Imaging
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
References
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Orrison, W.W. (2000). Open-Field Magnetic Resonance Imaging: Diagnostic Procedures and Protocols in the Brain. In: Grönemeyer, D.H.W., Lufkin, R.B. (eds) Open Field Magnetic Resonance Imaging. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-59581-3_14
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DOI: https://doi.org/10.1007/978-3-642-59581-3_14
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