Invention Grant
- Patent Title: Optimized RF shield design
-
Application No.: US14685021Application Date: 2015-04-13
-
Publication No.: US10557902B2Publication Date: 2020-02-11
- Inventor: Robert W. Brown , Yong Wu , Zhen Yao , Shmaryu Shvartsman , Thomas Chmielewski , Timothy Eagan
- Applicant: Case Western Reserve University
- Applicant Address: US OH Cleveland
- Assignee: Case Western Reserve University
- Current Assignee: Case Western Reserve University
- Current Assignee Address: US OH Cleveland
- Agency: Pillsbury Winthrop Shaw Pittman LLP
- Main IPC: G01V3/00
- IPC: G01V3/00 ; G01R33/422 ; G01R33/565 ; G01R33/341 ; G01R33/385 ; G01R33/48

Abstract:
Radio frequency (RF) shields used with magnetic resonance imaging (MRI) apparatus may experience gradient field induced eddy currents and RF field induced eddy currents. These eddy currents can cause the RF shield to heat up at an undesirable rate. RF shields are designed to have a desired degree of RF shielding and a desired heating attribute. Design goals for RF shields include gradient field transparency and RF field opacity, both of which can be influenced by eddy currents. Example methods identify a gradient field that will induce eddy currents and identify an RF field that will induce eddy currents. If a region on the RF shield is identified where the desired heating attribute will not be achieved, then a pattern of axial cuts and azimuthal cuts can be made in the RF shield to reduce gradient eddy current heating in the RF shield while maintaining desired RF shielding.
Public/Granted literature
- US20150212174A1 Optimized RF Shield Design Public/Granted day:2015-07-30
Information query