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Figure 1 | Radiation Oncology

Figure 1

From: Four-dimensional dosimetry validation and study in lung radiotherapy using deformable image registration and Monte Carlo techniques

Figure 1

A. The moving phantom was controlled by a motor with variable rotation frequency. The rotation wheel had variably-spaced holes in the radial direction which controlled the motion range. B. The phantom had cork placed within an acrylic container to simulate lungs. An acrylic rod was placed within the cork to simulate a tumor. An ion chamber was inserted into the acrylic rod to measure the point dose.

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