OC-0076: Second cancer risks after radiotherapy for breast cancer : What is the impact of advanced treatment techniques?

Image registration accuracy was<2mm for all anatomic head and neck landmark displacements in the x, y and z direction relative to CT. Image quality was found to be comparable to the commissioning benchmark. SNR data for T1 FSE and T2 FSE were not statically significantly different (p= 0.53, 0.10) from benchmark dataset. However, the benchmark configuration appears to provide more optimized signal across all anatomical structures. For superficial structures closer to the surface, e.g. parotid, the RT coil provides very high signal due to closer proximity of the coil (T1 FSE mean RT 126.1 v diagnostic 99.8). For deeper structures the converse is true, e.g. brainstem (mean SNR RT 33.7 v diagnostic 58.2). Conclusions: Benchmarking of the system and clinical process has allowed for the development of an MR-SIM quality assurance program for this anatomical site, with well defined imaging and image registration metrics.