Results 201 to 210 of about 13,693,867 (238)

Evaluation of Size Correction Factor for Size-specific Dose Estimates (SSDE) Calculation

Japanese Journal of Radiological Technology, 2016
American Association of Physicists in Medicine (AAPM) Report No.204 recommends the size-specific dose estimates (SSDE), wherein SSDE=computed tomography dose index-volume (CTDIvol )×size correction factor (SCF), as an index of the CT dose to consider patient thickness.
Kazufusa, Mizonobe, Yuta, Shiraishi, Satoshi, Nakano, Chiaki, Fukuda, Osamu, Asanuma, Kohei, Harada, Hiroyuki, Date   +6 more
openaire   +2 more sources

THE SIZE-SPECIFIC DOSE ESTIMATE (SSDE) FOR TRUNCATED COMPUTED TOMOGRAPHY IMAGES

Radiation Protection Dosimetry, 2016
The purpose of this study is to investigate truncated axial computed tomography (CT) images in the clinical environment and to produce correction factors for abdomen, thoracic and head regions based on clinical data, in order to accurately predict the water-equivalent diameter (DW) and size-specific dose estimate (SSDE). We investigated axial images of
Choirul, Anam, Freddy, Haryanto, Rena, Widita, Idam, Arif, Geoff, Dougherty   +4 more
openaire   +2 more sources

SIZE-SPECIFIC DOSE ESTIMATES IN PEDIATRIC BRAIN CT IN RELATION TO AGE AND WEIGHT

Radiation Protection Dosimetry, 2023
Abstract The size-specific dose estimate (SSDE) is used for radiation dose management in computed tomography (CT) and represents patient’s absorbed dose more accurately than volume CT dose index. The relationship between SSDE and age or weight was investigated using 980 pediatric brain CT scans.
Kaoru, Fujii, Yusuke, Inoue, Hiroyasu, Itoh, Ryosuke, Sasa, Hirofumi, Hata, Kohei, Mitsui   +5 more
openaire   +2 more sources

Size-specific dose estimates for various weighting factors of CTDI equation

Physical and Engineering Sciences in Medicine, 2019
Size-specific dose estimate (SSDE) was proposed by the American Association of Physicists in Medicine (AAPM) Task Group 204 to consider the effect of patient size in the x-ray CT dose estimation. Size correction factors to calculate SSDE were derived based on the conventional weighted CT dose index (CTDIw) equation.
Tomonobu Haba, Masanao Kobayashi, Shuji Koyama   +2 more
openaire   +2 more sources

Evaluation of direct point dose estimation based on the distribution of the size-specific dose estimate

Physical and Engineering Sciences in Medicine
The aim of this study was to evaluate the point doses using a distribution of the size-specific dose estimate (SSDE) from axial CT images of in-house phantoms having diameters from 8 to 40 cm. In-house phantoms made of polyester-resin (PESR) mixed with methyl ethyl ketone peroxide (MEKP) were used.
Choirul Anam, Heri Sutanto, Riska Amilia, Rini Marini, Sinta Nur Barokah, Noor Diyana Osman, Geoff Dougherty   +6 more
openaire   +2 more sources

Automated size-specific dose estimates using deep learning image processing

Medical Image Analysis, 2021
An automated vendor-independent system for dose monitoring in computed tomography (CT) medical examinations involving ionizing radiation is presented in this paper. The system provides precise size-specific dose estimates (SSDE) following the American Association of Physicists in Medicine regulations. Our dose management can operate on incomplete DICOM
Jan Maria Juszczyk, Pawel Badura, Joanna Czajkowska, Agata Wijata, Jacek Andrzejewski, Pawel Bozek, Michal Smolinski, Marta Biesok, Agata Sage, Marcin Rudzki, Wojciech Wieclawek   +10 more
openaire   +4 more sources

Estimation of size-specific dose estimates (SSDE) for paediatric and adults patients based on a single slice

Physica Medica, 2020
Volume averaged CT dose index (CTDIvol) is an important dose index utilized for CT dosimetry. Measurements of CTDIvol are performed in reference cylindrical phantoms of specified diameters. A size-specific dose estimate (SSDE) has been recommended for assessment of doses delivered to individual patients.
Abdullah Abuhaimed, Colin J Martin
openaire   +2 more sources

Size Specific Dose Estimates and Effective Dose in Multiphase Abdomen-Pelvis CT Examinations

Radiation Physics and Chemistry
Philomina Akhilesh, S D Sharma, B K Sapra   +2 more
exaly   +2 more sources

Size specific dose estimates in pediatric chest, abdomen and pelvis CT examinations

Physica Medica, 2016
Introduction Volume computed tomography dose index (CTDIvol) does not contain any dose information regarding the patient size. Size specific dose estimates (SSDE) give more reliable results accounting for the patient size as well. This parameter uses CTDIvol and size dependent conversion factors (fDw) which are calculated by means of water equivalent ...
Akgüngör, Kadir, Özsoykal, İsmail, Yurt, Ayşegül   +2 more
openaire   +3 more sources

Evaluation of Size-Specific Dose Estimates in Pediatric Abdominal CT

Korean Society of Computed Tomographic Technology
In pediatric abdominal CT examinations, the conventional CT dose index (CTDIvol) has limitations as it does not account for the patient’s body size. To address this issue, the American Association of Physicists in Medicine (AAPM) introduced the concept of size-specific dose estimate (SSDE), which considers individual patient body size.
Yoon-Chul Nam, Choon-Bong Son, Sang-Hun Kim, Min-Kyeong Kim   +3 more
openaire   +1 more source