A system for in situ S-parameter measurements of MR transmit arrays

The reflected RF power as a function of steering conditions and the coupling of coil elements can be determined from S-parameters of a MR transmit array. We developed a versatile system for in situ measurements of S-parameter matrices, which can be used to monitor the influence of loading conditions or coupling to the coil environment on the power balance and the coupling of a pTx coil. For an 8 channel coil the complete S-parameter matrix can be measured in less than one minute in situ. Since the system is independent of scanner hardware and does not interfere with a running sequence it can be used for monitoring any pTx system in situ, e.g. for the detection of abnormalities like metallic implants.

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.

Click here for more information on becoming a member.