Results 11 to 20 of about 3,755 (224)

Assessment of organ-specific neutron equivalent doses in proton therapy using computational whole-body age-dependent voxel phantoms [PDF]

Physics in Medicine and Biology, 2008
Proton beams used for radiotherapy will produce neutrons when interacting with matter. The purpose of this study was to quantify the equivalent dose to tissue due to secondary neutrons in pediatric and adult patients treated by proton therapy for brain lesions.
Christina, Zacharatou Jarlskog, Choonik, Lee, Wesley E, Bolch, X George, Xu, Harald, Paganetti   +4 more
openaire   +2 more sources

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

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

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

Dosimetric Impact of a New Computational Voxel Phantom Series for the Japanese Atomic Bomb Survivors: Children and Adults

Radiation Research, 2019
One of the largest sources of data on radiation exposure in humans is the study of the atomic bomb survivors at Hiroshima and Nagasaki, Japan performed by the Radiation Effects Research Foundation (RERF). As part of their retrospective dosimetry efforts for the atomic bomb survivors, RERF published two core systems: Dosimetry System 1986 (DS86) and ...
Keith, Griffin, Colin, Paulbeck, Wesley, Bolch, Harry, Cullings, Stephen, Egbert, Sachiyo, Funamoto, Tatsuhiko, Sato, Akira, Endo, Nolan, Hertel, Choonsik, Lee   +9 more
openaire   +3 more sources

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

A new flow chip in combination with multiphoton microscopy as a protocol for longitudinal 3D imaging of tissue calcification under shear stress

FEBS Open Bio, EarlyView.
Miniaturized flow chip platform enabling continuous perfusion and longitudinal multiphoton 3D imaging of vascular smooth muscle cell constructs under physiological flow. Brightfield imaging guides region selection, while CellTracker Green and mRuby‐labeled fetuin‐A visualize cells and mineral deposition, respectively. Magnesium supplementation markedly
Vytautas Kučikas, Aaron D. Morgan, Ignas Čiurlionis, Christian Böhm, Stefan Jockenhövel, Willi Jahnen‐Dechent, Marc A. M. J. van Zandvoort   +6 more
wiley   +1 more source

Dose coefficients for ICRP pediatric mesh-type reference computational phantoms under idealized external electron exposures

Nuclear Engineering and Technology
In the present study, a comprehensive dataset of dose coefficients for idealized external electron exposures has been established using the newly released ICRP-156 pediatric mesh-type reference computational phantoms (MRCPs) in conjunction with the ...
Chansoo Choi, Bangho Shin, Sungho Moon, Yeon Soo Yeom, Chan Hyeong Kim, Wesley E. Bolch   +5 more
doaj   +1 more source

Paramagnetic Rim Lesions Are Associated With Trans‐Synaptic Degeneration of the Visual Pathway in Multiple Sclerosis

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objectives Retrograde trans‐synaptic degeneration (rTSD) from posterior visual pathway lesions in multiple sclerosis (MS) is characterized by hemi‐macular ganglion cell‐inner plexiform layer (GCIPL) thinning and contralateral visual field loss.
Abdul Jaber Tayem, Angel Liu, Sargis Manukyan, Mustafa Subhi, Elaina Luskin, Bryan Quah, Sreekanth Madhusoodhanan Nair, Arzu C. Has Silemek, Gabriela Zabala, Yujie Cui, Laura Locke, Paula Barreras, Marwa Kaisey, Vinicius Calsavara, Daniel S. Reich, Nancy L. Sicotte, Pascal Sati, Omar Al‐Louzi   +17 more
wiley   +1 more source

Dose coefficients for the ICRP pediatric mesh-type reference computational phantoms under idealized external photon exposure geometries

Nuclear Engineering and Technology
The International Commission on Radiological Protection (ICRP) recently released the pediatric mesh-type reference computational phantoms (MRCPs) through ICRP Publication 156 to overcome the limitations of the pediatric voxel-type reference computational
Chansoo Choi, Bangho Shin, Yeon Soo Yeom, Wesley E. Bolch, Chan Hyeong Kim   +4 more
doaj   +1 more source