Abstract #3801

Comparative Assessment of Geometric Distortion for an MR-Linac Versus Several Diagnostic Scanners

Jordan Michael Slagowski¹, Yao Ding², Clifton David Fuller^2,3, Caroline Chung², Mo Kadbi⁴, Zhifei Wen¹, and Jihong Wang^1,3

¹Radiation Physics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States, ²Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States, ³The University of Texas Graduate School of Biomedical Sciences at Houston, Houston, TX, United States, ⁴MR Therapy, Philips HealthTech, Cleveland, OH, United States

The integration of a MR scanner with a linear accelerator (MR-Linac) may improve image guidance in radiation therapy (RT). Spatial fidelity is an important consideration in RT and should be evaluated for MR-Linac imaging. This work presents a phantom and software developed in-house to measure geometric distortion across a large MR imaging field-of-view. A comparative assessment of geometric distortion within a 1.5T MR scanner integrated with a 7 MV linear accelerator is performed versus several commercial scanners with field strengths ranging from 1.5T-3.0T. The geometric distortion within the MR-Linac was comparable or less than that measured with the diagnostic scanners.

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.