Conclusion: It is feasible to use gold anchor marker for Cyberknife. Ball shape or Tadpole gold anchor markers are recommended. Visual confirmation of lock-on is important due to the irregular shape of gold anchor markers. More study is needed to evaluate clinical effect. Presentation at the 2011 CyberKnife® Robotic Radiosurgery Summit
Tag Archives: Intrafraction Motion Management
Conclusion: We describe the use of the Gold Anchor fiducial markers in this poster. They have the advantage that a small amount of ferromagnetic material is mixed in the gold alloy to allow better visibility on MRI imaging than gold alloy fiducials alone. There are other markers that have been described (ref. 1) that also […]
Summary: This is the largest series reporting the feasibility and complications of the use of the Gold Anchor 25G system for percutaneous puncture in the lung. This is a quick procedure, performed under local anesthesia. A single marker per lesion minimizes the risk of complications related to the implementation: with a pneumothorax rate of 25% […]
Summary: In Italy, ultrasound guided implantation in liver was performed in 50 patients of 68 gold grain markers 1×4 mm through 17-gauge needles, 78 Gold Anchors 0.4×10 mm through 22-gauge needles, and 17 Gold Anchors 0.28×10 mm through 25-gauge needles. The use of 17-gauge needles resulted in five patients developing abdominal pain and the migration […]
Purpose: Triggered imaging is the use of kV image acquisition during treatment delivery to monitor intrafractional motion of implanted fiducials. An automatically identified fiducial point on the kV image is compared to its expected position predetermined from the treatment planning CT, and the treatment can be paused if the difference exceeds a user-definable tolerance. Conclusion: Triggered […]
Summary: Gold Anchors were implanted percutaneously via the trans-thoracic route in lung in 80 patients for CyberKnife treatments at the Hartmann Radiotherapy Institute in France. This led to 9 cases (11%) of pneumothorax, out of which 2 cases (2.5%) required a drain. All implanted fiducials were effectively tracked by CyberKnife. Article in Radiation Oncology, 2019
Background: Fiducial markers are frequently used before treatment for imageguided patient setup in radiation therapy (RT), but can also be used during treatment for image‐guided intrafraction motion detection. This report describes our implementation of automatic marker detection with periodic kV imaging (TrueBeam v2.5) to monitor and correct intrafraction motion during prostate RT. Methods: We evaluated […]
Objectives: To evaluate intrafractional fiducial marker position variations during stereotactic body radiotherapy (SBRT) in patients treated for liver metastases in visually guided, voluntary deep inspiration breath-hold (DIBH). Comment on methods: 10 patients with implanted fiducial markers were studied. Three DIBH CTs were acquired for treatment planning. Pre- and post-treatment CBCTs were acquired for each of […]
“Hepatocellular carcinoma effective stereotactic body radiotherapy using Gold Anchor and the Synchrony system: Two case reports and review of literature” Background: Radiotherapy for hepatocellular carcinoma (HCC) is considered to have limited efficacy because of treatment intensity considering that the irradiated area includes the liver, which is highly radiosensitive. In this report, we present two cases […]
“Evaluation of computed tomography metal artifact and CyberKnife fiducial recognition for novel size fiducial markers” Purpose: This study aimed to compare fiducial markers used in CyberKnife treatment in terms of metal artifact intensity observed in CT images and fiducial recognition in the CyberKnife system affected by patient body thickness and type of marker. Methods (extract): […]
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