Download Across the Sea of Suns (Galactic Center, Book 2) by Gregory Benford PDF

By Gregory Benford

From the Nebula Award-winning writer comes a newly revised variation of this tale in his vintage Galactic heart sequence.

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Extra resources for Across the Sea of Suns (Galactic Center, Book 2)

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Int J Radiat Biol. 2000;48:1187–95. 5. Yenice KM, Lovelock DM, Hunt MA, et al. CT image-guided intensity-modulated therapy for paraspinal tumors using stereotactic immobilization. Int J Radiat Biol. 2003;55:583–93. 6. Pouliot J, Bani-Hashemi A, Chen J, et al. Low-dose megavoltage cone-beam CT for radiation therapy. Int J Radiat Biol. 2005;61:552–60. 7. Jaffray DA, Siewerdsen JH, Wong JW, et al. Flat-panel cone-beam computed tomography for image-guided radiation therapy. Int J Radiat Biol. 2002;53:1337–49.

This resulted in substantial time savings during patient setup for treatment, and eradicated potential errors in target shifts relative to frame when transporting the patient in the frame from CT to treatment room. On the other hand tissue motion management techniques and tools permitted physicians to have more confidence that the dose prescribed to the target would actually be delivered even if the motion of the target exceeded margins assumed at planning. Another major hurdle which needed to be managed was addressing random and respiratory motion management.

1. 3 Stereotactic Body Radiation Therapy Systems 29 Fig. 2 Image-Guided Localization and Tracking Immobilization devices can reduce body and organ movement to a certain degree, whilst image-guided localization and tracking, with or without immobilization systems, may reduce the targeting spatial uncertainty to a minimum. We first discuss the imaging techniques used for locating the tumor in 3D. A variety of technologies are used—some of which involve imaging before the treatment, while others allow monitoring of target during treatment, either continuously or intermittently.

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