Results 21 to 30 of about 8,831 (260)

Comparing D-Bar and Common Regularization-Based Methods for Electrical Impedance Tomography [PDF]

, 2019
Objective: To compare D-bar difference reconstruction with regularized linear reconstruction in electrical impedance tomography. Approach: A standard regularized linear approach using a Laplacian penalty and the GREIT method for comparison to the D-bar ...
Adler, A., Hamilton, Sarah J., Lionheart, W.R.B.   +2 more
core   +2 more sources

High resolution in-vivo MR-STAT using a matrix-free and parallelized reconstruction algorithm [PDF]

, 2019
MR-STAT is a recently proposed framework that allows the reconstruction of multiple quantitative parameter maps from a single short scan by performing spatial localisation and parameter estimation on the time domain data simultaneously, without relying ...
Bernstein MA, Bruijnen T, MATLAB, Nocedal J, Valenberg W   +4 more
core   +2 more sources

Synthesis of Realistic Simultaneous Positron Emission Tomography and Magnetic Resonance Imaging Data [PDF]

, 2018
The investigation of the performance of different positron emission tomography (PET) reconstruction and motion compensation methods requires accurate and realistic representation of the anatomy and motion trajectories as observed in real subjects during ...
Polycarpou, I, Soultanidis, G, Tsoumpas, C   +2 more
core   +1 more source

Obtenção de volumes tumorais em pilhas de imagens PET usando técnicas de segmentação de imagens coloridas

Brazilian Journal of Radiation Sciences, 2015
This work is demonstrated the step by step how to segment color images on the thoracic region of an adult in order to separate the tumor volume at present same conditions without significantly changing the values of R components (Red), G (Green) and B ...
Jose Wilson Vieira, Igor Fagner Vieira, Leanderson Pereira Cordeiro, Ferdinand Jesus Lopes Filho, Fernando Roberto de Andrade Lima   +4 more
doaj   +1 more source

Deep learning in computational microscopy [PDF]

, 2019
We propose to use deep convolutional neural networks (DCNNs) to perform 2D and 3D computational imaging. Specifically, we investigate three different applications. We first try to solve the 3D inverse scattering problem based on learning a huge number of
Nehmetallah, George, Nguyen, Thanh, Tian, Lei   +2 more
core   +1 more source

Organ and Effective Dose Coefficients for Cranial and Caudal Irradiation Geometries: Neutrons

EPJ Web of Conferences, 2017
With the introduction of new recommendations by ICRP Publication 103, the methodology for determining the protection quantity, effective dose, has been modified.
Veinot K.G., Eckerman K.F., Hertel N.E., Hiller M.M.   +3 more
doaj   +1 more source

Advancing pediatric organ dose assessment in radioiodine therapy with ICRP pediatric mesh-type reference computational phantoms

Nuclear Engineering and Technology
The present study provides updated S values (rT ← thyroid) for 30 radiosensitive organs/tissues for pediatric patients undergoing radioiodine therapy with iodine-131, utilizing the pediatric mesh-type reference computational phantoms (MRCPs) very ...
Chansoo Choi, Bangho Shin, Soo Min Lee, Yeon Soo Yeom   +3 more
doaj   +1 more source

Development of a GPU-based Monte Carlo dose calculation code for coupled electron-photon transport

, 2010
Monte Carlo simulation is the most accurate method for absorbed dose calculations in radiotherapy. Its efficiency still requires improvement for routine clinical applications, especially for online adaptive radiotherapy.
Amitava Majumdar, Bielajew A F Hirayama H Nelson W R Rogers D W O, Briesmeister J F, Dongju Choi, Gu X, Gu X, Jacques R Taylor R Wong J McNutt T, Josep Sempau, Lensch H Strzodka R, Li J S, Li M, Ma C M, Men C, Nelson W R Hirayama H Rogers D W O, NVIDIA, Salvat F Fernández-Varea J M Baró J Sempau J, Salvat F Fernández-Varea J M Sempau J, Sempau J, Sharp G C, Steve B Jiang, Woodcock E Murphy T Hemmings P Longworth S, Xu F, Xuejun Gu, Xun Jia, Yan G R   +24 more
core   +1 more source

Machine Learning for Predicting Neutron Effective Dose

Applied Sciences
The calculation of effective doses is crucial in many medical and radiation fields in order to ensure safety and compliance with regulatory limits. Traditionally, Monte Carlo codes using detailed human body computational phantoms have been used for such ...
Ali A. A. Alghamdi
doaj   +1 more source

IDAC-Dose 2.1, an internal dosimetry program for diagnostic nuclear medicine based on the ICRP adult reference voxel phantoms

EJNMMI Research, 2017
Background To date, the estimated radiation-absorbed dose to organs and tissues in patients undergoing diagnostic examinations in nuclear medicine is derived via calculations based on models of the human body and the biokinetic behaviour of the ...
Martin Andersson, Lennart Johansson, Keith Eckerman, Sören Mattsson   +3 more
doaj   +1 more source