Results 21 to 30 of about 15,618,877 (244)

Comparative Study of Image Quality and Radiation Dose between 120kVp Filtered Back Projection and 80kVp Iterative Reconstructed Computed Tomography Images

Journal of Karnali Academy of Health Sciences, 2023
Background: Iterative Reconstruction techniques have been shown to produce diagnostically acceptable images at low doses to the patient. This study aimed to compare the image quality and radiation dose between 120kVp Filtered Back Projection and 80kVp ...
Sweta Joshi, Sharma Paudel, Sundar Suwal, Shanta Lall Shrestha, Benu Lohani, Shashi Shekhar Shingh   +5 more
doaj   +1 more source

The Comparison of Size-Specific Dose Estimate in CT Examination Based on Head and Body PMMA Phantom [PDF]

, 2018
Nowadays, a dose estimate for individual patients undergoing CT examination is carried out using the metric of size-specific dose estimate (SSDE), which is calculated by multiplying a volume CT dose index (CTDIvol) and a correction factor that is a ...
Geoff Dougherty
core   +2 more sources

Automatic Calculation Of Lateral Diameter For Size-Specific Dose Estimate Using A Matlab-Based Kinect Camera

, 2021
In this paper, we develop a Matlab-based program on a Kinect camera to automatically calculate lateral diameter (Dlat) for estimating size-specific dose estimate (SSDE). SSDE is a metric used to express the patient’s dose in a CT examination. This metric
Dougherty, Geoff, Widodo, Catur Edi, Anam, Choirul, Naufal, Ariij   +3 more
core   +2 more sources

Estimation of The Patient’s Specific Effective Dose for The Total Body F18- FDG PET/CT Scan, A Single Centre Experience [PDF]

Egyptian Journal of Nuclear Medicine, 2022
The whole-body scanning of fluorine-18-fluoro-2-deoxy-D-glucose (18F-FDG) combined with positron emission tomography/ computed tomography (PET/CT) is considered an important modality used for diagnosis, tracking, and staging of the oncological as well as
Ibrahim Saad Ahmed, Hassan Ibrahim
doaj   +1 more source

A study to determine whether the volume-weighted computed tomography dose index gives reasonable estimates of organ doses for thai patients undergoing abdomen and pelvis computed tomography examinations

Journal of Medical Physics, 2017
Introduction: Values for the CTDIvol, which is displayed on scanner consoles, give doses relative to a phantom much larger than most Thai patients, and the CTDIvoldoes not take account of differences in patient size, which affect organ doses.
Supawitoo Sookpeng, Colin J Martin, Chitsanupong Butdee   +2 more
doaj   +1 more source

Effect of Phantom Size and Tube Voltage on the Size-Conversion Factor for Patient Dose Estimation in Computed Tomography Examinations [PDF]

Iranian Journal of Medical Physics, 2020
Introduction: This study aimed to establish the conversion factors to normalize the output dose of volumetric computed tomography dose index (CTDIvol) to the patient dose (i.e.
Dwi Adhianto, Choirul Anam, Heri Sutanto, Mohd Ali   +3 more
doaj   +1 more source

Split-bolus computed tomography urography (CTU) achieves more than half of radiation dose reduction in females and overweight patients than conventional single-bolus computed tomography urography

Translational Oncology, 2021
Objective: To compare radiation dose between single-bolus and split-bolus computed tomography urography (CTU). Materials and methods: We prospectively enrolled patients undergoing single-bolus and split-bolus CTU from 2019 June to 2020 June. The age, sex
Li-Jen Wang, Yon-Cheong Wong, Yi-Shuan Hwang, See-Tong Pang, Cheng-Keng Chuang, Ying-Hsu Chang   +5 more
doaj   +1 more source

Redefining Radiation Metrics: Evaluating Actual Doses in Computed Tomography Scans

Biomedicines
Background: Computed tomography (CT) contributes significantly to the collective dose from medical sources, raising concerns about potential health risks.
Dominika Sabiniewicz-Ziajka, Arkadiusz Szarmach, Małgorzata Grzywińska, Paweł Gać, Maciej Piskunowicz   +4 more
doaj   +1 more source

Estimation of Peak Skin Dose and Its Relation to the Size-Specific Dose Estimate

, 2022
M.S.The study tests the concept that the size-specific dose estimate (SSDE) and the Computed Tomography Dose Index volume (CTDIvol) have a significant association with the peak skin dose (PSD).
Abdullah, Abdullatif S
core  

Children's estimates of food portion size: the development and evaluation of three portion size assessment tools for use with children [PDF]

, 2008
A number of methods have been developed to assist subjects in providing an estimate of portion size but their application in improving portion size estimation by children has not been investigated systematically.
Mathers, John, J. C. Mathers, Cornelissen, Piers, Foster, E, Cornelissen, P, Harris, Julie, Matthews, J N S, L. Marshall, Lloyd, J, Adamson, A J, Matthews, John, Adamson, Ashley, Wrieden, W, J. Harris, M. Nelson, Barton, K L, Foster, Emma, Marshall, L., Nelson, Michael, E. Foster, Marshall, L, Lloyd, John, Nelson, M, Matthews, J, W. L. Wrieden, Wrieden, W L, Barton, Karen L., Wrieden, Wendy, J. Lloyd, A. J. Adamson, Adamson, A, K. L. Barton, Harris, J, Mathers, J, Marshall, Lindsay, Mathers, J C, P. Cornelissen, J. N. S. Matthews, Harris, Julie; id_orcid   +38 more
core   +1 more source