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Inferences About Prostate Intrafraction Motion From Pre- and Posttreatment Volumetric Imaging by Justus Adamson; Qiuwen Wu is a Medicine article available to read on EtoBox.

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## Purpose: To evaluate the ability of rectal filling, bladder filling, and prostate localization from pre- and posttreatment volumetric imaging to predict prostate intrafraction motion. ## Methods and materials: Pre- and posttreatment cone beam computed tomography images (cbcts) and intrafractional kv fluoroscopy were acquired at each fraction for 20 prostate patients in supine position, totaling 374 fractions available for analysis. rectal and bladder filling status were evaluated for each cbct, and correlation with prostate intrafraction motion measured from kv fluoroscopy was performed. the accuracy of pre and posttreatment prostate localization to predict intrafraction motion was evaluated. ## Results: Rectal filling status was a significant predictor of prostate intrafraction motion (p <0.001), and gas volume was correlated with the maximum vector displacement at mv delivery with a correlation coefficient (cc) of 0.37 and p 0.5 cm(3) within the imaged region (cc = 0.52, p = 0.028). a weak relationship was found between bladder filling and posterior prostate drift for fractions with gas volume ## Conclusions: Rectal filling is a significant predictor of prostate intrafraction

Who reads Inferences About Prostate Intrafraction Motion From Pre- and Posttreatment Volumetric Imaging?

Author

Justus Adamson; Qiuwen Wu

Publisher

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

Published

2009

Language

EN

Field

Medicine (Health Sciences)