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The Influence of an Endorectal Balloon on Intrafraction Prostate Motion by Smeenk, R.; Louwe, R.J.W.; Langen, K.M.; Shah, A.P.; Kupelian, P.A.; van Lin, E.N.J.T.; Kaanders, J.H.A.M. is a Medicine article available to read on EtoBox.

What is The Influence of an Endorectal Balloon on Intrafraction Prostate Motion about?

Purpose/Objective(s): Molecular imaging is an important modality for recognizing tumor location. If a planar molecular-image of the tumor can be taken during patient setup verification in radiotherapy, it may be possible to accurately confirm that the irradiation field adequately covers the tumor. We will report the results of our feasibility study on a PET-Linac system for patient setup verification using a parallel-plane PET configuration. Materials/Methods: We assumed that the parallel-plane PET system consisted of a pair of position sensitive scintillation detector array placed 60 cm away from each other. Each detector array is equipped with 11,664 GSO scintillator crystals (2.5 x 2.5 x 25 mm 3 ). Monte Carlo simulations using Geant4 were performed on a simple geometry for patient setup verification. A 24 cm x 24 cm cylindrical water phantom embedded with four spherical 18 F gamma-ray sources (25 kBq/cc) having diameters of 8, 16, 24, 32 mm was placed in between the plane detector arrays. The background gamma rays in the water phantom were varied by assuming contrast ratios relative to the tumor of 1:50, 1:20, 1:10, and 1:5. Acquisition time was assumed to be 60 seconds, and th

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Author

Smeenk, R.; Louwe, R.J.W.; Langen, K.M.; Shah, A.P.; Kupelian, P.A.; van Lin, E.N.J.T.; Kaanders, J.H.A.M.

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0360-3016)

Published

2010

Language

EN

Field

Medicine (Health Sciences)