Results 1 to 10 of about 7,015,582 (266)

Body physical parameters instead of water equivalent diameter to calculate size-specific dose estimate in adult chest CT [PDF]

Scientific Reports
This study aimed to investigate body physical parameters as substitutes for water equivalent diameter (Dw) while calculating size-specific dose estimates (SSDEs) during adult chest computed tomography (CT).
Xiaoyan Hu, Jie Gou, Fan Yang, Dajing Guo   +3 more
doaj   +5 more sources

An improved method for automated calculation of the water-equivalent diameter for estimating size-specific dose in CT. [PDF]

J Appl Clin Med Phys, 2021
AbstractPurposeThe aim of this study is to propose an algorithm for the automated calculation of water‐equivalent diameter (Dw) and size‐specific dose estimation (SSDE) from clinical computed tomography (CT) images containing one or more substantial body part.MethodsAll CT datasets were retrospectively acquired by the Toshiba Aquilion 128 CT scanner ...
Anam C, Mahdani FR, Dewi WK, Sutanto H, Triadyaksa P, Haryanto F, Dougherty G.   +6 more
europepmc   +5 more sources

Automated Calculation of Water-equivalent Diameter (DW) Based on AAPM Task Group 220. [PDF]

J Appl Clin Med Phys, 2016
The purpose of this study is to accurately and effectively automate the calculation of the water‐equivalent diameter () from 3D CT images for estimating the size‐specific dose. is the metric that characterizes the patient size and attenuation. In this study, was calculated for standard CTDI phantoms and patient images. Two types of phantom were used,
Anam C, Haryanto F, Widita R, Arif I, Dougherty G.   +4 more
europepmc   +4 more sources

Evaluation of AAPM Reports 204 and 220: Estimation of effective diameter, water-equivalent diameter, and ellipticity ratios for chest, abdomen, pelvis, and head CT scans. [PDF]

J Appl Clin Med Phys, 2018
AbstractPurposeTo confirm AAPM Reports 204/220 and provide data for the future expansion of these reports by: (a) presenting the first large‐scale confirmation of the reports using clinical data, (b) providing the community with size surrogate data for the head region which was not provided in the original reports, and additionally providing the ...
Burton CS, Szczykutowicz TP.
europepmc   +5 more sources

Automated calculation of slice-specific volume computed tomography dose index, water-equivalent diameter, and size-specific dose estimation for computed tomography scans [PDF]

Diagnostic and Interventional Radiology
PURPOSE: To develop and validate an automated computational tool for calculating a slice-specific volume computed tomography (CT) dose index (CTDIvol), a water-equivalent diameter (Dw), and size-specific dose estimates (SSDEs) from CT images, addressing ...
Supawitoo Sookpeng, Rosario Lopez-Gonzalez, Suwapim Chanlaor, Boriphat Kadman   +3 more
doaj   +2 more sources

Relationship between Water-equivalent Diameter, Computed Tomography Dose Indices, and Image Noise in Pediatric Head Computed Tomography Under Active and Inactive Tube Current Modulation [PDF]

Journal of Medical Physics
Purpose: This study investigated the relationships among water-equivalent diameter (Dw), volume computed tomography dose index (CTDIvol), size-specific dose estimate (SSDE), and image noise in pediatric head computed tomography (CT) under active and ...
Evi Setiawati, Choirul Anam, Bella Diani Safitri, Much Azam, Qidir Maulana Binu Soesanto, Agus Margiantono   +5 more
doaj   +2 more sources

Experimental Study on Three-Dimensional Bubble Rising Behaviours by Virtual Stereo Vision [PDF]

Journal of Applied Fluid Mechanics, 2023
This study addresses the measurement of three-dimensional (3D) bubble rising behaviour in still water with bubble equivalent diameters ranging from 2.61 mm to 5.11 mm using high-speed imaging and virtual stereo vision technology.
Q. Feng, Q. Wang, C. Y. Zhao
doaj   +1 more source

Study on pore and fracture evolution characteristics of oil shale pyrolysed by high-temperature water vapour [PDF]

Oil Shale, 2022
In this study, a self-designed test system for injecting water vapour was used to pyrolyse oil shale from Barkol, Xinjiang, China. The internal structure of oil shale samples after water vapour pyrolysis at different temperatures was characterised using ...
Jing Zhao, Lusheng Yang, Dong Yang, Zhiqin Kang, Lei Wang   +4 more
doaj   +1 more source

Correlations Between Body Weight and Size-Specific Dose Estimate on Thoracic Computed Tomography Examination

Atom Indonesia, 2022
The dose received by a patient on CT examination is expressed in size-specific dose estimates (SSDE) which is a function of the patient diameter, x-ray attenuation, and scanner output (volume computed tomography dose index, CTDIvol). Patient diameter and
A. L. Wati, C. Anam, A. Nitasari, S Syarifudin, G. Dougherty   +4 more
doaj   +1 more source

Multivariate analysis of effective dose and size-specific dose estimates for thorax and abdominal computed tomography

Journal of Medical Physics, 2023
The study aimed to compute the effective dose (E) and size-specific dose estimate (SSDE) of routine adult patients undergoing thorax and abdominal computed tomography (CT) imaging and to present their multivariate analysis. All adult thorax and abdominal
Mudasir Ashraf Shah, Mehtab Ahmad, Saifullah Khalid, Syed M Danish Qaseem, Shaista Siddiqui, Sayema Talib, Sajad Ahmed Rather, Arfat Firdous   +7 more
doaj   +1 more source