Abstract #1393

Longitudinal Monitoring of MR Image Distortion of a dedicated MR-Simulator for Radiotherapy over a 6-month Period

Max W.K. Law¹, Jing Yuan¹, Oilei O.L. Wong¹, and Ben Yu¹

¹Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, Hong Kong, Hong Kong

This study investigated the variation of three-dimensional geometric distortion of geometric distortion caused by B0 inhomogeneity and gradient nonlinearity throughout a 6-month period of a 1.5T 700mm-wide bore MR-simulator. A large customized geometric accuracy phantom was constructed and a program was developed for distortion quantification. Experiment results showed that the distortion varied throughout the testing period. Regular validation of geometric accuracy might be needed if prior distortion information is used for distortion correction. Nonetheless, the variation of distortion had minimal effects on the sequences when considering radiotherapy distortion requirements.

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.