OC-0182: Demonstration of real-time, automatic 3D seed & needle localization in brachytherapy using integrated EM tracking
J. Adam M. Cunha, Daniel Saltiel, D Binnekamp, I-C Hsu, A. Chang, J. Pouliot · Radiotherapy and Oncology · 2013
2 nd ESTRO Forum 2013 S71 choosing this mono-energy, it is possible to achieve MAR in patients with hip prostheses.This approach is simple and easy to implement.The goal of this study is to assess the MAR capacity of DECT in the context of LDR seed implants.More specifically, we aim to ascertain whether the use of DECT can yield dose calculations whose accuracy is not marred by metal artefacts.Materials and Methods: DECT imaging at 100 kVp and 140 kVp was performed on an ultrasound phantom designed for prostate implants containing inert LDR brachytherapy seeds.The magnitude of artefacts was evaluated as a function of mono-energetic attenuation maps by comparing the standard deviation (σ) in a region of interest (ROI) containing artefacts and one free of artefacts.The ROIs exclude the high signal from the seeds themselves.Additionally, the same analysis was performed on the density map obtained from the standard DECT ρ-Z decomposition which provides a density map directly.