Initial application of digital tomosynthesis to improve brachytherapy treatment planning

Alan H. Baydush; Mahta Mirzaei McKee; June King; Devon J. Godfrey

doi:10.1117/12.713845

13 March 2007 Initial application of digital tomosynthesis to improve brachytherapy treatment planning

Alan H. Baydush, Mahta Mirzaei McKee, June King, Devon J. Godfrey

Proceedings Volume 6510, Medical Imaging 2007: Physics of Medical Imaging; 65102F (2007) https://doi.org/10.1117/12.713845
Event: Medical Imaging, 2007, San Diego, CA, United States

Abstract

We present preliminary investigations that examine the feasibility of incorporating volumetric images generated using digital tomosynthesis into brachytherapy treatment planning. The Integrated Brachytherapy Unit (IBU) at our facility consists of an L-arm, C-arm isocentric motion system with an x-ray tube and fluoroscopic imager attached. Clinically, this unit is used to generate oblique, anterior-posterior, and lateral images for simple treatment planning and dose prescriptions. Oncologists would strongly prefer to have volumetric data to better determine three dimensional dose distributions (dose-volume histograms) to the target area and organs at risk. Moving the patient back and forth to CT causes undo stress on the patient, allows extensive motion of organs and treatment applicators, and adds additional time to patient treatment. We propose to use the IBU imaging system with digital tomosynthesis to generate volumetric patient data, which can be used for improving treatment planning and overall reducing treatment time. Initial image data sets will be acquired over a limited arc of a human-like phantom composed of real bones and tissue equivalent material. A brachytherapy applicator will be incorporated into one of the phantoms for visualization purposes. Digital tomosynthesis will be used to generate a volumetric image of this phantom setup. This volumetric image set will be visually inspected to determine the feasibility of future incorporation of these types of images into brachytherapy treatment planning. We conclude that initial images using the tomosynthesis reconstruction technique show much promise and bode well for future work.

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Alan H. Baydush, Mahta Mirzaei McKee, June King, and Devon J. Godfrey "Initial application of digital tomosynthesis to improve brachytherapy treatment planning", Proc. SPIE 6510, Medical Imaging 2007: Physics of Medical Imaging, 65102F (13 March 2007); https://doi.org/10.1117/12.713845

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KEYWORDS

Imaging systems

X-ray computed tomography

Computed tomography

Visualization

Bladder

Data acquisition

Reconstruction algorithms

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