Early Clinical Experience With Kilovoltage Image-Guided Radiation Therapy for Interfraction Motion Management

2008 ◽  
Vol 33 (4) ◽  
pp. 268-274 ◽  
Author(s):  
Joshua D. Lawson ◽  
Tim Fox ◽  
Eric Elder ◽  
Adam Nowlan ◽  
Lawrence Davis ◽  
...  
Keyword(s):  
Radiation Therapy ◽  
Clinical Experience ◽  
Motion Management ◽  
Image Guided Radiation Therapy ◽  
Image Guided ◽  
Early Clinical Experience ◽  
Interfraction Motion

Fiducial visibility on planar images during motion-synchronized tomotherapy treatments

2022 ◽  
Author(s):  
William Ferris ◽  
Larry Albert DeWerd ◽  
Wesley S Culberson
Keyword(s):  
Management System ◽  
Signal To Noise Ratio ◽  
Detection Algorithm ◽  
Position Error ◽  
Signal To Noise ◽  
Motion Management ◽  
Future Studies ◽  
Planar Images ◽  
Noise Ratio

Abstract Objective: Synchrony® is a motion management system on the Radixact® that uses planar kV radiographs to locate the target during treatment. The purpose of this work is to quantify the visibility of fiducials on these radiographs. Approach: A custom acrylic slab was machined to hold 8 gold fiducials of various lengths, diameters, and orientations with respect to imaging axis. The slab was placed on the couch at the imaging isocenter and planar radiographs were acquired perpendicular to the custom slab with varying thicknesses of acrylic on each side. Fiducial signal to noise ratio (SNR) and detected fiducial position error in millimeters were quantified. Main Results: The minimum output protocol (100 kVp, 0.8 mAs) was sufficient to detect all fiducials on both Radixact configurations when the thickness of the phantom was 20 cm. However, no fiducials for any protocol were detected when the phantom was 50 cm thick. The algorithm accurately detected fiducials on the image when the SNR was larger than 4. The MV beam was observed to cause RFI artifacts on the kV images and to decrease SNR by an average of 10%. Significance: This work provides the first data on fiducial visibility on kV radiographs from Radixact Synchrony treatments. The Synchrony fiducial detection algorithm was determined to be very accurate when sufficient SNR is achieved. However, a higher output protocol may need to be added for use with larger patients. This work provided groundwork for investigating visibility of fiducial-free solid targets in future studies and provided a direct comparison of fiducial visibility on the two Radixact configurations, which will allow for intercomparison of results between configurations.

scholarly journals PO-0791: Motion management and Vero dynamic tracking for SBRT in oligometastatic disease: a prospective trial

2016 ◽  
Vol 119 ◽  
pp. S372
Author(s):  
R. Van den Begin ◽  
B. Engels ◽  
M. Boussaer ◽  
J. Dhont ◽  
M. Burghelea ◽  
...  
Keyword(s):  
Prospective Trial ◽  
Motion Management ◽  
Oligometastatic Disease ◽  
Dynamic Tracking

scholarly journals Audio-Visual Biofeedback for Respiratory Motion Management: Comparison of the Reproducibility of Breath-Holding between Visual and Audio Guidance

2018 ◽  
Vol 09 (13) ◽  
pp. 2286-2294
Author(s):  
Naoki Sano ◽  
Masahide Saito ◽  
Hiroshi Onishi ◽  
Kengo Kuriyama ◽  
Takafumi Komiyama ◽  
...  
Keyword(s):  
Respiratory Motion ◽  
Breath Holding ◽  
Motion Management ◽  
Visual Biofeedback
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