Results 21 to 30 of about 168,547,723 (230)

A simple analytical model for a fast 3D assessment of peripheral photon dose during coplanar isocentric photon radiotherapy

Frontiers in Oncology, 2022
Considering that cancer survival rates have been growing and that nearly two-thirds of those survivors were exposed to clinical radiation during its treatment, the study of long-term radiation effects, especially secondary cancer induction, has become ...
Beatriz Sánchez-Nieto, Ignacio N. López-Martínez, José Luis Rodríguez-Mongua, Ignacio Espinoza   +3 more
doaj   +1 more source

Teaching out-of-field in Western Australia [PDF]

, 2009
A former head of the American Federation of Teachers, Albert Shanker, once called out-of-field teaching education's "dirty little secret" (Ingersoll, 2003, p. 5).
Price, A., McConney, Andrew, McConney, A., Price, Anne   +3 more
core   +1 more source

The Estimation of Radiation Dose to Out-of-Field Points of Organs at Risk in Block and MLC Shielded Fields in Lung Cancer Radiation Therapy

Frontiers in Biomedical Technologies, 2023
Purpose: Photon-field shaping in radiation therapy with cerrobend block or Multi-Leaf Collimator (MLC) leads to an increase in the scattered dose to the out-of-field Organ At Risk (OAR).
Nastaran Sadat Momeni, Saeed Afraydoon, Nima Hamzian, Abolfazl Nikfarjam, Mahmoud Vakili Ghasemabad, Sepideh Abdollahi-Dehkordi, Masoud Shabani, Mahdi Dehestani, Adel Heidari   +8 more
doaj   +1 more source

Estimated radiation doses to ovarian and uterine organs in breast cancer irradiation using radio‐photoluminescent glass dosimeters (RPLDs)

Journal of Medical Radiation Sciences, 2021
Introduction The well‐being of breast cancer patients is essential, especially fertility in patients of reproductive age. The objective of this study was to estimate the radiation doses to the ovaries and uterus for different treatment techniques of ...
Puntiwa Oonsiri, Chulee Vannavijit, Mananchaya Wimolnoch, Sivalee Suriyapee, Kitwadee Saksornchai   +4 more
doaj   +1 more source

Balance Problems for Integer Circuits [PDF]

, 2018
We investigate the computational complexity of balance problems for {-,*}-circuits computing finite sets of natural numbers. These problems naturally build on problems for integer expressions and integer circuits studied by Stockmeyer and Meyer (1973 ...
Dose, Titus, Titus Dose
core   +1 more source

Eliminating the Fear of Getting ‘Caught Out’: An Examination of the Development of Out-of-Field Mathematics Teachers’ Professional Self-Understanding

, 2022
Research has demonstrated that teacher identity matters in mathematics education. This is of heightened concern when we consider those teaching mathematics out-of-field, a phenomenon prevalent at the post-primary level in the Irish context.
O’Meara, Niamh, Niamh O’Meara, Goos, Merrilyn, Stephen Quirke, Faulkner, Fiona, Fiona Faulkner, Merrilyn Goos, Ní Ríordáin, Máire, Máire Ní Ríordáin, Ciara Lane, Quirke, Stephen, Lane, Ciara   +11 more
core   +1 more source

In-Air Electron Streaming Effect for Esophageal Cancer Radiotherapy With a 1.5 T Perpendicular Magnetic Field: A Treatment Planning Study

Frontiers in Oncology, 2020
PurposeTo investigate the in-air out-of-field electron streaming effect (ESE) for esophageal cancer radiotherapy in the presence of 1.5 T perpendicular magnetic field.MethodsTen esophageal cancer patients treated with conventional Linac were ...
Hongdong Liu, Shouliang Ding, Bin Wang, Yongbao Li, Ying Sun, Xiaoyan Huang   +5 more
doaj   +1 more source

Consideration of the radiation dose delivered away from the treatment field to patients in radiotherapy

Journal of Medical Physics, 2011
Radiation delivery to cancer patients for radiotherapy is invariably accompanied by unwanted radiation to other parts of the patient′s body. Traditionally, considerable effort has been made to calculate and measure the radiation dose to the target as ...
Michael L Taylor, Tomas Kron
doaj   +1 more source

Absorbed dose calculation for a realistic CT-derived mouse phantom irradiated with a standard Cs-137 cell irradiator using a Monte Carlo method.

PLoS ONE, 2023
Computed tomography (CT) derived Monte Carlo (MC) phantoms allow dose determination within small animal models that is not feasible with in-vivo dosimetry.
Amir Entezam, Andrew Fielding, David Bradley, Davide Fontanarosa   +3 more
doaj   +1 more source

Assessment of Dose Calculation Accuracy of TiGRT Treatment Planning System for Physical Wedged fields in Radiotherapy [PDF]

Iranian Journal of Medical Physics, 2016
Introduction Wedge modifiers are commonly applied in external beam radiotherapy to change the dose distribution corresponding to the body contour and to obtain a uniform dose distribution within the target volume.
Bagher Farhood, Mohammad Taghi Bahreyni Toossi, Shokouhozaman Soleymanifard   +2 more
doaj   +1 more source