A “quality-control-based correction method” for displayed dose indices on CT scanner consoles in patient dose surveys

Parsi, Masoumeh; Sohrabi, Mehdi; Mianji, Fereidoun A.; Paydar, Reza

doi:10.1016/j.ejmp.2017.05.054

Physica Medica

2017

DOI: 10.1016/j.ejmp.2017.05.054

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A “quality-control-based correction method” for displayed dose indices on CT scanner consoles in patient dose surveys

Masoumeh Parsi

Mehdi Sohrabi

Fereidoun A. Mianji

et al.

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Cited by 8 publications

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“…Both methods are time-consuming and costly. Regarding the QC method, proposed by Parsi et al [11], it is claimed that due to the more accurate measurement of the CTDI W calculated through the quality control reports, the DRL was calculated with more validity than the DC method [12]. Considering the effective diameter of the patient, introduced as an important parameter when the dose was measured based on reports no.…”

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Determination of Diagnostic Reference Level (DRL) in Common Computed Tomography Examinations with the Modified Quality Control-Based Dose Survey Method in Four University Centers: A Comparison of Methods

et al. 2021

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Background:The diagnostic reference level (DRL) is measured with different methods in the common Computed tomography (CT) exams, but it has not been measured through the size-specific dose estimate (SSDE) method in Iran, yet.Objective: This study aimed to calculate the local DRL (LDRL) using the new quality control-based dose survey method (QC) and patients' effective diameter (MQC) and compare them with a data collection method (DC) as well as local national DRLs (NDRL). Material and Methods:In this cross-sectional study, LDRL, based on the third quartile of volumetric computed tomography dose index (CTDI vol ) and dose length product (DLP) values, was calculated for the four common CT examinations in four CT scan centers affiliated with Shiraz University of Medical Sciences by DC, QC and MQC methods. The CTDI vol of each patient for each CT exam calculated with three methods was compared with paired t-test. Also, the LDRL using MQC method was compared with other national DRL studies.Results: There was a significant difference between the CTDI vol values calculated with MQC and QC in all four examinations (P <0.001). The LDRL based on CTDI vol obtained by the MQC method for head, sinus, chest, abdomen, and pelvis were (50,18,15,19) mGy, respectively, and the calculated DLP values were also (735, 232, 519, 984) mGy.cm. Conclusion:In MQC, LDRL based on CTDI vol was calculated with a mean difference percentage of (19.2 ± 11.6)% and (27.1 ± 8.1)% as compared to the QC and DC methods, respectively. This difference resulted from the use of the SSDE method and dose accuracy in the QC dose survey.

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confidence: 99%

Determination of Diagnostic Reference Level (DRL) in Common Computed Tomography Examinations with the Modified Quality Control-Based Dose Survey Method in Four University Centers: A Comparison of Methods

et al. 2021

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Statistical analysis for obtaining optimum number of CT scanners in patient dose surveys for determining national diagnostic reference levels

2018

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Variability of the discrepancy between manufacturer and measured CTDI 100 values by scanner type, acquisition parameters and phantom size

et al. 2018

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A “quality-control-based correction method” for displayed dose indices on CT scanner consoles in patient dose surveys

Cited by 8 publications

References 5 publications

Determination of Diagnostic Reference Level (DRL) in Common Computed Tomography Examinations with the Modified Quality Control-Based Dose Survey Method in Four University Centers: A Comparison of Methods

Determination of Diagnostic Reference Level (DRL) in Common Computed Tomography Examinations with the Modified Quality Control-Based Dose Survey Method in Four University Centers: A Comparison of Methods

Statistical analysis for obtaining optimum number of CT scanners in patient dose surveys for determining national diagnostic reference levels

Variability of the discrepancy between manufacturer and measured CTDI 100 values by scanner type, acquisition parameters and phantom size

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