Abstract
CT-based dosimetry for every high-dose-rate (HDR) brachytherapy fraction was initiated at the Medical College of Wisconsin (MCW) in 2004. Normal organ point doses based on films often unreliably define doses to normal tissues, especially the circuitous sigmoid. Additionally, organs are deformed differently by each HDR insertion. Magnetic resonance imaging (MRI) at the time of fraction 1 was also initiated in 2004, since even though normal organ dose–volume relationships can be well-defined with computed tomography (CT), the tumor dose–volume relationships could not be due to poor soft tissue resolution. The Gyn GEC ESTRO Guidelines defined MRI-based targets and relevant dose specifications [1, 2]. The logistical and financial challenges of MRI with each HDR fraction made this impossible at MCW until 2008 when a 3-T MR unit was installed. We will describe CT-based planning for each of 5 HDR fractions and MRI-based planning for fraction 1.
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References
Haie-Meder C, Potter R, Van Limbergen E, et al. Recommendations for Gynecological (GYN) GEC-ESTRO Working Group (I): concepts and terms in 3D image-based 3D treatment planning in cervix cancer brachytherapy with emphasis on MRI assessment of GTV and CTV. Radiother Oncol. 2005;74:235–45.
Potter R, Haie-Meder C, Van Limbergen E, et al. Recommendations for Gynecological (GYN) GEC ESTRO Working Group (II): concepts and terms in 3D image-based treatment planning in cervix cancer brachytherapy- 3D volume parameters and aspects of 3D image-based anatomy, radiation physics radiobiology. Radiother Oncol. 2006;78:67–77.
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© 2011 Springer Berlin Heidelberg
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Rownd, J., Erickson, B.E. (2011). USA: Medical College of Wisconsin, Milwaukee. In: Viswanathan, A., Kirisits, C., Erickson, B., Pötter, R. (eds) Gynecologic Radiation Therapy. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-68958-4_22
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DOI: https://doi.org/10.1007/978-3-540-68958-4_22
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