Search Results for author: Andre Mastmeyer

Found 11 papers, 0 papers with code

Comparison of 2D vs. 3D U-Net Organ Segmentation in abdominal 3D CT images

no code implementations8 Jul 2021 Nico Zettler, Andre Mastmeyer

A two-step concept for 3D segmentation on 5 abdominal organs inside volumetric CT images is presented.

Organ Segmentation Segmentation

3D Bounding Box Detection in Volumetric Medical Image Data: A Systematic Literature Review

no code implementations10 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.

Feature Engineering regression

Robust GPU-based Virtual Reality Simulation of Radio Frequency Ablations for Various Needle Geometries and Locations

no code implementations11 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.

Genaue modellbasierte Identifikation von gynäkologischen Katheterpfaden für die MRT-bildgestützte Brachytherapie

no code implementations27 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.

Computed Tomography (CT)

Population-based Respiratory 4D Motion Atlas Construction and its Application for VR Simulations of Liver Punctures

no code implementations5 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.

Interpatient Respiratory Motion Model Transfer for Virtual Reality Simulations of Liver Punctures

no code implementations26 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.

A New 3D Method to Segment the Lumbar Vertebral Bodies and to Determine Bone Mineral Density and Geometry

no code implementations19 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.

Segmentation

Evaluation of Direct Haptic 4D Volume Rendering of Partially Segmented Data for Liver Puncture Simulation

no code implementations19 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.

A New 3D Segmentation Methodology for Lumbar Vertebral Bodies for the Measurement of BMD and Geometry

no code implementations19 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.

Position Segmentation

Model-based Catheter Segmentation in MRI-images

no code implementations18 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.

Segmentation

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