Magnetostatic focal spot correction for x-ray tubes operating in strong magnetic fields using iterative optimization

Purpose: Combining x-ray fluoroscopy and MR imaging systems for guidance of interventional procedures has become more commonplace. By designing an x-ray tube that is immune to the magnetic fields outside of the MR bore, the two systems can be placed in close proximity to each other. A major obstacle...

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Veröffentlicht in:	Medical physics (Lancaster) 2012-09, Vol.39 (9), p.5567-5583
Hauptverfasser:	Lillaney, Prasheel, Shin, Mihye, Conolly, Steven M., Fahrig, Rebecca
Format:	Artikel
Sprache:	eng
Schlagworte:	active shielding ALGORITHMS Anodes biomedical equipment Biomedical instrumentation and transducers, including micro‐electro‐mechanical systems (MEMS) biomedical MRI CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS Clinical applications coils Coils Windings Conductive connections CURRENT DENSITY DEMAGNETIZATION Details of transformers or inductances, in general Devices sensitive to very short wavelength, e.g. x‐rays, gamma‐rays or corpuscular radiation diagnostic radiography Digital computing or data processing equipment or methods, specially adapted for specific applications Electrical noise and shielding equipment electromagnetic shielding ELECTRON BEAMS Feasibility Studies finite element analysis FINITE ELEMENT METHOD FLUOROSCOPY HEATING INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY Involving electronic [emr] or nuclear [nmr] magnetic resonance, e.g. magnetic resonance imaging ITERATIVE METHODS linear programming MAGNETIC FIELDS Magnetic Resonance Imaging - instrumentation Magnetic Resonance Physics Magnetoresistance Magnets medical computing NEODYMIUM NMR IMAGING nonlinear programming Numerical optimization OPTIMIZATION PERMANENT MAGNETS Screening of apparatus or components against electric or magnetic fields SHIELDING SIMULATION Temperature Transforming x‐rays Vacuum tubes X RADIATION X-RAY TUBES X-Rays XMR X‐ and γ‐ray instruments X‐ray imaging x‐ray production X‐ray technique
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