Execution of MR sequences (RF-heating) and/or microwave energy during MRgMWA may lead to harmful heating at tissue surface with non-cooled MR-conditional applicators. MR imaging was performed using a high SAR sequence and several geometric orientations of phantom/applicators to assess RF-heating impact. Applicator insertion depth (with/without ultrasound gel) and spacing of two applicators on shaft heating were evaluated. Negligible temperature changes due to RF-heating were observed. Significant temperature increases were measured during MWA due to action of MWA system/applicator, which can be mitigated by increasing the applicator insertion depth. Further reduction in temperature change can be achieved by using ultrasound gel.
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