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Related Concept Videos

Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

549
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
549
Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

453
Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
Here, in order to determine the magnitude of velocity and acceleration for point...
453

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Related Experiment Video

Updated: Sep 17, 2025

Dynamic Lung Tumor Tracking for Stereotactic Ablative Body Radiation Therapy
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Real-Time Motion Management for a Small Target in the Right Lower Lobe With Large Tumor Motion Using Radixact

Guang-Pei Chen1, An Tai1, Lindsay Puckett1

  • 1Radiation Oncology, Medical College of Wisconsin, Milwaukee, USA.

Cureus
|July 2, 2025
PubMed
Summary

Accurate real-time motion tracking is essential for lung cancer radiotherapy. The Radixact Synchrony system offers continuous tumor motion adaptation without implanted markers, improving treatment.

Keywords:
lung oligometastasesmarklessmotion trackingradixact synchronystereotactic body radiotherapy (sbrt)

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Area of Science:

  • Radiation Oncology
  • Medical Physics

Background:

  • Accurate real-time motion tracking is critical for effective stereotactic body radiotherapy (SBRT) in lung cancer patients with significant tumor motion.
  • Conventional motion reduction techniques (e.g., compression, breath hold, gating) can be uncomfortable and prolong treatment.
  • The Radixact Synchrony system provides continuous adaptation to tumor motion without requiring implanted fiducials.

Observation:

  • A case study involving a patient with a small tumor in the right lower lobe (RLL) exhibiting substantial motion was managed using the Radixact Synchrony system.
  • The study focused on treatment planning, delivery accuracy, and clinical outcomes for this specific patient case.

Findings:

  • The Radixact Synchrony system facilitated continuous adaptation to large tumor motion in the RLL.
  • Treatment planning and delivery accuracy were evaluated, demonstrating the system's capability in managing complex cases.
  • Clinical outcomes for the patient treated with this technology were assessed.

Implications:

  • The Radixact Synchrony system presents a viable alternative for managing lung tumors with significant motion in SBRT.
  • This technology may enhance patient comfort and potentially reduce treatment times compared to traditional methods.
  • Further investigation into the broader clinical utility and outcomes of this system in SBRT is warranted.