Results 241 to 250 of about 7,015,582 (266)

Assessing the Influence of Dose Modulation on Water Equivalent Diameter Estimation in Pediatric Head CT Imaging

Radiation Effects and Defects in Solids
A Khallouqi, A Halimi, O El Rhazouani
exaly   +2 more sources

Institutional computed tomography diagnostic reference levels based on water-equivalent diameter and size-specific dose estimates

Journal of Radiological Protection, 2018
Abstract S ize-specific institutional diagnostic reference levels (DRLs) were generated for chest and abdominopelvic computed tomography (CT) based on size-specific dose estimates (SSDEs) and depending on patients’ water-equivalent diameter (Dw).
Johannes, Boos, Christoph, Thomas, Elisabeth, Appel, Yan, Klosterkemper, Christoph, Schleich, Joel, Aissa, Oliver Th, Bethge, Gerald, Antoch, Patric, Kröpil   +8 more
openaire   +2 more sources

Feasibility of size-specific organ-dose estimates based on water equivalent diameter for common head CT examinations: a Monte Carlo study

Journal of Radiological Protection, 2023
Abstract Computed tomography dose index (CTDI) is an unreliable dose estimate outside of the standard CTDI phantom diameters (16 and 32 cm). Size-specific dose estimate (SSDE) for head computed tomography (CT) examination was studied in the American Association of Physicists in Medicine Report 293 to provide SSDE coefficient factors ...
M Tahiri, Y Benameur, M Mkimel, R El Baydaoui, M R Mesardi   +4 more
openaire   +2 more sources

Pathology-based radiation dose in computed tomography: investigation of the effect of lung lesions on water-equivalent diameter, CTDIVol and SSDE in COVID-19 patients

Radiation Protection Dosimetry, 2023
Abstract Lung lesions can increase the CT number and affect the water-equivalent diameter (Dw), Dw-based conversion factor (CFw), and Dw-based size-specific dose estimate (SSDEw). We evaluated the effect of COVID-19 lesions and total severity score (TSS) on radiation dose considering the effect of automatic tube current modulation (ATCM)
Ahmad Mohammadbeigi, Jalal Kargar Shouraki, Hojat Ebrahiminik, Majid Nouri, Hamed Bagheri, Hamid Moradi, Ahmad Azizi, Narges Fadaee, Taher Soltanzadeh, Yousef Moghimi   +9 more
openaire   +2 more sources

Size Specific Dose Estimate Based on Water-Equivalent Diameter for Common Head Ct Examinations: A Monte Carlo Study

2022
The Computed tomography dose index (CTDI) is an unreliable dose estimate outside of the standard CTDI phantom diameters (16 and 32 cm). Size-specific dose estimate (SSDE) for head CT examination was studied in the American Association of Physicists in Medicine (AAPM) report 293 to provide SSDE coefficient factors based on water equivalent diameter as ...
M. Tahiri, M. Mkimel, Y. Benameur, R. El Baydaoui, M.R Mesardi   +4 more
openaire   +1 more source

Determination of Water-Equivalent Diameter (Dw) and Size-Specific Dose Estimates (SSDE) for Adult Patients in Abdominal CT Examinations

Radiation Effects and Defects in Solids
Abdelmajid Choukri, Zakaria Tahiri, Sekkat Hamza   +2 more
exaly   +2 more sources

PO-1781 Assessment of water equivalent diameter of CT patients based on effective diameter

Radiotherapy and Oncology, 2021
A. Abuhaimed, C. Martin
openaire   +1 more source

Scanner-independent coefficients to estimate organ doses of CT pediatric patients based on water-equivalent diameter

2022
Purpose Methods and materials Results Conclusion Personal information and conflict of interest ...
openaire   +1 more source

Assessment of body habitus during cardiac computed tomography as compared to water equivalent diameter

2013
Purpose Methods and Materials Results Conclusion References Personal ...
openaire   +1 more source

A SIMPLE METHOD FOR CALIBRATING PIXEL VALUES OF THE CT LOCALIZER RADIOGRAPH FOR CALCULATING WATER-EQUIVALENT DIAMETER AND SIZE-SPECIFIC DOSE ESTIMATE

Radiation Protection Dosimetry, 2017
The purpose of this study is to establish the relationship between the pixel value (I) of the CT localizer radiograph and water-equivalent thickness (tw) in a straightforward procedure. We used a body CTDI phantom, which was scanned in the AP and LAT projections. After transformation from the pixel values of the images to tw, water-equivalent diameter (
Choirul, Anam, Toshioh, Fujibuchi, Takatoshi, Toyoda, Naoki, Sato, Freddy, Haryanto, Rena, Widita, Idam, Arif, Geoff, Dougherty   +7 more
openaire   +2 more sources