Conclusion: The new MRI compatible Gold Anchor™ adds new features on top of the existing advantages. For specific anatomical targets treatment planning with fiducial marker information can be performed based only on MR images. For other targets images from both MRI and CT can be matched through the information from the fiducials. The content of […]
Tag Archives: MRI
Summary: Users interested in seeing the markers for CT-MRI registration purposes should use 0.28×10 mm Gold Anchor markers. Poster at ESTRO 2014
Summary: The authors selected ten different markers suitable for endoscopic placement in the pancreas and tested the visibility and artifacts of these markers on magnetic resonance imaging (MRI). They conclude that when visibility of the markers is most important, markers that contain iron [Gold Anchor] are optimal, preferably in a folded configuration. Article in Medical […]
Summary: Gold Anchors were implanted through 22-gauge needle in two liver cancer patients at the Gifu Municipal Hospital in Japan. This caused little pain during placement under local anesthesia with xylocaine. No complication occurred in either patient. The iron-containing fiducial marker composed of 99.5% gold and 0.5% iron made visualization in MRI easy, which helped […]
Background and purpose: A GTV boost is suggested to result in higher complete response rates in rectal cancer patients, which is attractive for organ preservation. Fiducials may offer GTV position verification on (CB)CT, if the fiducial-GTV spatial relationship can be accurately defined on MRI. The study aim was to evaluate the MRI visibility of fiducials […]
Summary: The effect on diffusion-weighted (DWI) MRI was evaluated of 0.28×10 mm Gold Anchor fiducial markers, implanted with a line shape. Conclusions: Gold fiducial markers demonstrated negligible effect on DWI quality. Therefore, it appears that the use of these markers does not preclude the optimal utilization of MRI, particularly DWI, during follow-up in prostate cancer […]
Purpose (extract): “To clinically implement an MRI-only planning (MROP) workflow for both X-ray and MRI-guided systems.” Methods (extract): “MROP implementation involved optimizing MRI simulation protocols developing a deep learning-based sCT generation method, and automating fiducial marker detection. A multichannel CycleGAN model was trained using T1-weighted Dixon images to generate sCT. For SBRT cases, the immobilization device […]