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Imaging for Post-implant Dosimetry

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Book cover Interstitial Prostate Brachytherapy

Abstract

Imaging the prostate after low-dose rate brachytherapy is a means of assessing the quality of the implant and the calculated dosimetry results can be correlated with the toxicity and eventual clinical outcomes for these patients. Computed tomography (CT) has long been the accepted imaging technique for post-implant dosimetry despite its acknowledged limitations. It is relatively cheap and convenient for the patient although definition of the prostate and structures at risk is limited because of the inherently poor soft tissue resolution of CT in this area. Magnetic resonance imaging (MRI) offers the advantage of superior soft tissue resolution but has limitations with source recognition and is relatively expensive. Transrectal ultrasound (TRUS) has been used to facilitate intraoperative dosimetry and is the basis for the newer real-time implant techniques that have evolved in recent years. TRUS however also has its limitations with source identification. Image fusion incorporating the benefits of different imaging techniques has been developed for post-implant dosimetry and can offer some improvements over CT but at some cost, and this approach is demanding of medical physics resources. Every brachytherapy centre should have an established programme for post-implant dosimetry in place that can help identify problems with technique and facilitate improvements in implant technique over time. This chapter will review the specific contribution and inherent limitations of the various imaging techniques that can be used for post-implant dosimetry.

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Authors and Affiliations

  1. Institute Of Oncology, St. James Hospital, Leeds, UK

    Brendan M. Carey (Consultant Radiologist)

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  1. Brendan M. Carey
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Correspondence to Brendan M. Carey .

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Editors and Affiliations

  1. Ratzeburger Allee 160, Lübeck, 23538, Germany

    György Kovács

  2. University College London, Mount Vernon Cancer Centre, Rickmansworth Road, London, HA62RN, United Kingdom

    Peter Hoskin

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© 2013 Springer-Verlag Berlin Heidelberg

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Carey, B.M. (2013). Imaging for Post-implant Dosimetry. In: Kovács, G., Hoskin, P. (eds) Interstitial Prostate Brachytherapy. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-36499-0_9

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  • DOI: https://doi.org/10.1007/978-3-642-36499-0_9

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-36498-3

  • Online ISBN: 978-3-642-36499-0

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