Patient Dose Survey Based on Size-Specific Dose Estimate and Acceptable Quality Dose in Chest and Abdomen/Pelvis Ct Examinations

Mehdipour, Ali; Parsi, Masoumeh; Khorram, Faezeh-Sadat

doi:10.1093/rpd/ncy288

Cited by 10 publications

(9 citation statements)

References 9 publications

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“…The correlation for the abdominal and for the chest region they found are also seen in our investigations. However, they did not include gender in their study, where our results show a difference between female and male patients ( 15 ) . Xu et al found that the \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{upgreek} \usepackage{mathrsfs} \setlength{\oddsidemargin}{-69pt} \begin{document} }{}$\mathrm{BMI}$\end{document} is better suited than body weight to estimate \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{upgreek} \usepackage{mathrsfs} \setlength{\oddsidemargin}{-69pt} \begin{document} }{}$\mathrm{SSDE}$\end{document} .…”

Section: Discussionmentioning

confidence: 68%

Can the Size-Specific Dose Estimate Be Derived From the Body Mass Index? A Feasibility Study

Steiniger

Klippel

Teichgräber

et al. 2022

Radiation Protection Dosimetry

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Size-specific dose estimate ($\mathbf{SSDE}$) index appears to be more suitable than the commonly used volume computed tomography dose index ($\mathbf{C}{\mathbf{TDI}}_{\mathbf{vol}}$) to estimate the dose delivered to the patient during a computed tomography (CT) scan. We evaluated whether an ${\mathbf{SSDE}}_{\mathbf{BMI}}$ can be determined from the patient’s body mass index ($\mathbf{BMI}$) with sufficient reliability in the case that a $\mathbf{SSDE}$ is not given by the CT scanner. For each of the three most used examination types, CT examinations of 50 female and 50 male patients were analyzed. The $\mathbf{SSDE}$ values automatically provided by the scanner were compared with ${\mathbf{SSDE}}_{\mathbf{BMI}}$ determined from $\mathbf{C}{\mathbf{TDI}}_{\mathbf{vol}}$ and $\mathbf{BMI}$. A good accordance of ${\mathbf{SSDE}}_{\mathbf{BMI}}$ and $\mathbf{SSDE}$ was found for the chest and abdominal regions. A low correlation was observed for the head region. The presented method is a simple and practically useful surrogate approach for the chest and abdominal regions but not for the head.

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Section: Discussionmentioning

confidence: 68%

Can the Size-Specific Dose Estimate Be Derived From the Body Mass Index? A Feasibility Study

Steiniger

Klippel

Teichgräber

et al. 2022

Radiation Protection Dosimetry

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“…Because the CT scan has the highest accumulated radiation dose among all medical exposures it seems the SSDE will be placed on the CT console as a tools to establishment of DRLs and optimization of protocols in future; thus upgrading and using of this index is necessary. In this study for the first time the DRLs established for head and abdomen-pelvis CT examinations and compared with national DRL and other same studies in Iran (7,15) . Auto exposure control (AEC) adjusts the tube current according the attenuation data from localizer (16) .…”

Section: Discussionmentioning

confidence: 99%

“…As we mentioned in first paragraph the CT scan is responsible for 49% of all medical exposure; thus, for the first DRLs establishment in Ilam we focused on CT scan as the more important modality in medical radiation exposures. Many studies have established the CT scan DRLs in different countries (9)(10)(11)(12) ; also same studies carried out in Iran (1,7,9,13,14) . Sohrabi et al study is the most greatest study in Iran that was carried out in 157 scanner for assessment the radiation dose of head, sinus, chest, and abdomen-pelvis CT examinations to establishment the national DRLs (15) .…”

Section: Introductionmentioning

confidence: 99%

“…Just two studies have investigated the CT scan DRLs based on SSDE in Iran. The first study carried out by Mehdipour et al in Shiraz in the year 2019 year for adults (7) and second study was for pediatric patients for chest, head and abdomen-pelvis in Kermanshah city by Mohammadbeigi et al (1) . Although the study of Mehdipour et al was in adult but DRLs can be determined as "local" and even in every imaging center according to ICRP.…”

Section: Introductionmentioning

confidence: 99%

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Radiation dose of head and abdomen-pelvis computed tomography examinations using size-specific dose estimate

Ahmadifard,

Bakhshandeh,

Mohammadbeigi

et al. 2022

Int J Radiat Res

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Background: Concern about radiation risk of computed tomography (CT) scan as a diagnostic modality has increased in recent years. Diagnostic reference levels (DRLs) is one of the tools to optimizing radiation dose of patients. CTDIv (Volume Computed tomography dose index) and DLP (Dose Length product) are used for assessment of DRLs. The CTDIv under/overestimate the patient dose. AAPM has introduced SSDE (Size-specific dose estimates) for estimation of patient. In this study, the DRLs of head and abdomen-pelvis CT examinations of adults is determined using CTDIv, DLP and SSDE. Materials and Methods: 680 CT examinations of head and abdomen-pelvis were collected from PACS (Picture archiving and communication system) in Imam Khomeini and Mostafa Khomeini hospitals. The D eff , CF and SSDE calculated using AAPM TG-204 and TG-220. Statistics analysis calculated using SPSS version 18. Results: For abdomenpelvis third quartile of CTDI V , SSDE and DLP was 9.96, 13.58 and 527 and values of 27.62, 26.79 and 402.90 are determined for head, respectively that are lower than national DRLs. Also, calculated conversion factor (CF) for head and abdomen-pelvis was 0.97 ± 0.75and 1.45 ± 0.17, respectively. Conclusion: DRLs were lower than other studies in this study. Using the AEC (Auto Exposure Control) and different kVp in this hospitals can help optimization of patient dose. The SSDE must be calculable by radiographers to more accurate estimation of patient dose using CFs.

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“…Since SSDE was announced, several softwares have been developed to measure the effective dose and organ dosage based on SSDE [9,10]. Several studies reported that SSDE was used to represent dose optimization values such as diagnostic reference level (DRL) and acceptable quality dose (AQD) [11][12][13][14]. SSDE is estimated from the output dose or the volume CT dose index (CTDI vol ) and patient characteristics.…”

Section: Introduction mentioning

confidence: 99%

Comparisons of Water-Equivalent Diameter Measured on Images of Abdominal Routine Computed Tomography with and without A Contrast Agent

et al. 2021

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The size-specific dose estimate (SSDE) is a metric for an estimation of patient dose in computed tomography (CT). The SSDE strongly depends on the water-equivalent diameter (D W ). In abdominal CT examinations, a contrast agent is sometimes used to more clearly visualize tissue lesions. The Hounsfield unit (HU) of CT images with and without the use of a contrast agent at specific areas is slightly different and it may affect the D W value. This study aimed to compare the D W values calculated from axial CT images in patients who had undergone routine abdominal scans both with and without the use of a contrast agent. Axial images of 144 patients with a weight range of 3.5 kg to 90 kg who had undergone routine abdominal scans both with and without the use of a contrast agent using a Siemens Sensation 64 CT scanner were retrospectively collected. The D W values were automatically calculated using the Matlab-based IndoseCT (version 15a) software. The results show the percentage difference between D W,contrast and D W,non-contrast is below 2 %. As a result, the mean SSDE contrast is 1.5 % smaller than SSDE non-contrast . Due to the effect of a contrast agent on the D W and SSDE values is below 2 %, the axial images of CT abdomen without the use of a contrast agent can be used as the accurate estimation of D W and SSDE for images with the use of a contrast agent.

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Patient Dose Survey Based on Size-Specific Dose Estimate and Acceptable Quality Dose in Chest and Abdomen/Pelvis Ct Examinations

Cited by 10 publications

References 9 publications

Can the Size-Specific Dose Estimate Be Derived From the Body Mass Index? A Feasibility Study

Can the Size-Specific Dose Estimate Be Derived From the Body Mass Index? A Feasibility Study

Radiation dose of head and abdomen-pelvis computed tomography examinations using size-specific dose estimate

Comparisons of Water-Equivalent Diameter Measured on Images of Abdominal Routine Computed Tomography with and without A Contrast Agent

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