As part of mandated yearly performance evaluations on over 120 GE, Siemens, Philips and Toshiba 1.5T scanners, the ACR phantom was used to make 2555 measurements of RF slice profiles and thicknesses. Aggregated slice profiles are plotted showing clear differences between vendors both in terms of ‘squareness’ and FWHM thickness. With a target slice thickness of 5.0 mm the measured thicknesses ranged from 4.21 to 6.65 mm! The affect that interslice gap has on measured profiles (RF crosstalk) is demonstrated for T1 weighted sequences. A very surprising dependence of measured thickness on slice position on the ACR phantom is demonstrated.
How to access this content:
For one year after publication, abstracts and videos are only open to registrants of this annual meeting. Registrants should use their existing login information. Non-registrant access can be purchased via the ISMRM E-Library.
After one year, current ISMRM & ISMRT members get free access to both the abstracts and videos. Non-members and non-registrants must purchase access via the ISMRM E-Library.
After two years, the meeting proceedings (abstracts) are opened to the public and require no login information. Videos remain behind password for access by members, registrants and E-Library customers.
Keywords