Results 61 to 70 of about 5,341 (200)

Guidelines for Pediatric Radiotherapy Simulation: A Report From the Children's Oncology Group Radiation Oncology Discipline

Pediatric Blood &Cancer, Volume 73, Issue 9, September 2026.
ABSTRACT Pediatric radiation therapy presents unique challenges compared to adult treatments, including those of immobilization, potential need for sedation, and the critical importance of accurate, reproducible positioning. Additionally, heightened attention to imaging doses is necessary to minimize long‐term toxicity in survivors.
Parham Alaei, Stephen Mihalcik, Sujith Baliga, Young Kwok, Dana Casey, Eric Ehler, Christiane Burton, John C. Breneman, Daphne A. Haas‐Kogan, Suzanne L. Wolden, Arnold C. Paulino, Nadia N. Laack, Natia Esiashvili, Sarah Milgrom, Christine Hill‐Kayser, Thomas J. Fitzgerald, John A. Kalapurakal, Chia‐Ho Hua   +17 more
wiley   +1 more source

Development Of An Automatic Calculation Method For Ct Dose Estimation Based On Individual Specific Size In Paediatric Population [PDF]

, 2022
The current dose estimation based on CTDIvol in paediatric CT leads to significant inaccuracies in dose estimation due to inadequate size consideration.
Abdulkadir, Muhammad Kabir
core   +1 more source

Quantifying variation in DLP‐ to‐ effective‐dose conversion factors in CT using a Monte Carlo‐based dose‐estimation software

Journal of Applied Clinical Medical Physics, Volume 27, Issue 9, September 2026.
Abstract Background A common method to estimate the effective dose in CT is to multiply the dose length product in a CT scan by a conversion factor (k). The k‐factors are determined by dividing the effective dose (calculated using a weighted summation of organ doses) by the dose length product (DLP) for specific digital phantoms.
Jelena M. Mihailovic, Renxin Chu, Da Zhang, Andrew M. Hernandez, Kai Yang, Lifeng Yu   +5 more
wiley   +1 more source

Implementazione e ottimizzazione di un protocollo per l’imaging ibrido a bassa dose con tomografia ad emissione di fotone singolo, studio preliminare

Journal of Biomedical Practitioners, 2020
Introduzione e scopo La tomografia computerizzata (CT) della SPECT/CT è una componente necessaria per la correzione dell'attenuazione (AC) e la localizzazione anatomica (AL) nell'imaging ibrido.
Roberto Rinaldi, Luca Camoni
doaj   +1 more source

Prospective estimation of water equivalent diameter and SSDE using 3D landmark CT scans

Journal of Applied Clinical Medical Physics, Volume 27, Issue 9, September 2026.
Abstract Background 3D Landmark (3DLM) scans have recently been introduced in some new CT scanners for automatic scan planning instead of paired 2D localizers, with potential additional utility. Purpose The purpose of this work was to measure the accuracy and precision of 3DLM scans for determining water equivalent diameter (Dw${{D}_w}$) and size ...
Andrew M. Hernandez, Sarah Yoon, Michael T. Corwin, Eric S. Diaz, Ahmadreza Ghasemiesfe, Sarah E. McKenney, John M. Boone   +6 more
wiley   +1 more source

Automatic individualized contrast medium dosage during hepatic computed tomography by using computed tomography dose index volume (CTDIvol)

, 2014
To compare hepatic parenchymal contrast media (CM) enhancement during multi-detector row computed tomography (MDCT) and its correlation with volume pitch-corrected computed tomography dose index CTDIvol) and body weight (BW).
Björk, Jonas,, Svensson, Anders, Nyman, Ulf, Cederlund, Kerstin, Lund University., Brismar, Torkel B., Aspelin, Peter   +6 more
core   +1 more source

Radiation Dose Optimization in CT Imaging: Benchmarking CTDIvol and DLP Against International DRLs in Nigeria

UMYU Scientifica
Computed Tomography (CT) is an indispensable diagnostic imaging system, but it contributes significantly to patient radiation exposure. To safeguard patients and ensure best practice, the International Commission on Radiological Protection recommends compliance with Diagnostic Reference Levels (DRLs). The Federal Teaching Hospital Birnin Kebbi (FTHBK),
Garba I. I., Maidamma, B., Samaila, B., Rilwanu, M. D.   +3 more
openaire   +2 more sources

Radiation intensity () and visibility of anatomical structures in head CT examinations [PDF]

Journal of Applied Clinical Medical Physics, 2016
The purpose of this study was to quantify how changing the amount of radiation used to perform routine head CT examinations () affects visibility of key anatomical structures. Eight routine noncontrast head CT exams were selected from six CT scanners, each of which had a different setting (60 to 75 mGy).
Sameer, Tipnis, Rajesh, Thampy, Zoran, Rumboldt, Maria, Spampinato, Gisele, Matheus, Walter, Huda   +5 more
openaire   +2 more sources

Phantom evaluation of small‐pixel effect in ultra‐high‐resolution photon‐counting CT: Noise texture and high‐contrast spatial resolution

Journal of Applied Clinical Medical Physics, Volume 27, Issue 9, September 2026.
Abstract Background Ultra‐high‐resolution (UHR) photon‐counting CT (PCCT) with small‐pixel detectors improves resolution and noise, but its dependence on diverse imaging conditions remains insufficiently characterized. Purpose To systematically evaluate the small‐pixel effect in UHR PCCT by assessing noise properties and high‐contrast spatial ...
Kyu‐Ho Song, Colin Shan, Gary Xu, Xinhui Duan, Yue Zhang, Kuan Zhang, Liqiang Ren   +6 more
wiley   +1 more source

Determining CTDIvol for cone beam ct with partial rotational coverage and wide beams: Symmetry and reciprocity

, 2017
Purpose: The radiation dose to the patient in C-arm cone beam CT (C-arm CBCT) is delivered in a similar fashion to that by standard diagnostic CT.
Vanderhoek, Matthew, Bakalyar, Donovan
core   +1 more source