no code implementations • 8 Jul 2021 • Nico Zettler, Andre Mastmeyer
A two-step concept for 3D segmentation on 5 abdominal organs inside volumetric CT images is presented.
no code implementations • 10 Dec 2020 • Daria Kern, Andre Mastmeyer
An overview of bounding box detection options is presented and helps researchers to select the most promising approach for their target objects.
no code implementations • 11 Jul 2019 • Niclas Kath, Heinz Handels, Andre Mastmeyer
Methods: This publication presents a new GPU-based, accurate method for the simulation of radio-frequency ablations for lesions at the needle tip in general and for an existing visuo-haptic 4D VR simulator.
no code implementations • 27 Feb 2018 • Andre Mastmeyer
A technical challenge associated with the use of MRI imaging for brachytherapy - in contrast to computed tomography (CT) imaging - is the dark-diffuse appearance and thus difficult identification of the catheter paths in the resulting images.
no code implementations • 5 Dec 2017 • Andre Mastmeyer, Matthias Wilms, Heinz Handels
Virtual reality (VR) training simulators of liver needle insertion in the hepatic area of breathing virtual patients currently need 4D data acquisitions as a prerequisite.
no code implementations • 26 Jul 2017 • Andre Mastmeyer, Matthias Wilms, Heinz Handels
Then the methodology shown here allows the transfer of existing reference respiratory motion models of a 4D reference patient to a new static 3D patient.
no code implementations • 19 May 2017 • Andre Mastmeyer, Klaus Engelke, Christina Fuchs, Willi Kalender
Quantitative computed tomography (QCT) is a standard method to determine bone mineral density (BMD) in the spine.
no code implementations • 19 May 2017 • Andre Mastmeyer, Klaus Engelke, Sebastian Meller, Willi Kalender
In this paper we present a new 3D segmentation approach for the vertebrae of the lower thoracic and the lumbar spine in spiral computed tomography datasets.
no code implementations • 19 May 2017 • Andre Mastmeyer, Dirk Fortmeier, Heinz Handels
The evaluation of the force algorithms compared to a force output from fully manually segmented gold-standard patient models, yields a low mean of 0. 12 N root mean squared force error and up to 1. 6 N for systematic maximum absolute errors.
no code implementations • 19 May 2017 • Andre Mastmeyer, Klaus Engelke, Willi Kalender
In this paper a new technique is presented that extracts the geometry of lumbar vertebral bodies from spiral CT scans.
no code implementations • 18 May 2017 • Andre Mastmeyer, Guillaume Pernelle, Lauren Barber, Steve Pieper, Dirk Fortmeier, Sandy Wells, Heinz Handels, Tina Kapur
Accurate and reliable segmentation of catheters in MR-guided interventions remains a challenge, and a step of critical importance in clinical workflows.