Establishment of diagnostic reference level of abdominopelvic CT procedure of university hospital center Mohammed VI, Oujda

Aabid, Mohammed; Semghouli, Slimane; Hakam, Oum Keltoum; Choukri, Abdelmajid

doi:10.1145/3368756.3369011

Cited by 4 publications

(3 citation statements)

References 15 publications

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“…An estimate of radiation doses from pelvimetry performed using different CT methods has been discussed by Phexell et al [25]. Doses delivered during pelvimetry procedures using CT were estimated by Semghouli et al [10]. This current study considers pregnant women who are referred for a CT pelvimetry examination because they are scheduled to undergo a caesarean section.…”

Section: Introduction mentioning

confidence: 98%

“…Recently, studies have been conducted to evaluate the radiation dose received from different examinations performed by using CT scanners [6][7][8][9]. In this context, studies on the establishment of diagnostic reference levels (DRLs) have been published in order to define for different types of CT examinations an appropriate dose level that, ideally, should not be exceeded [10][11][12] to keep the dose received by the patient at an acceptable level. So, according to radiation safety principles, before deciding that a pregnant woman should undergo pelvic CT, the practitioner should be aware of possible risks involved and then justify whether the diagnostic benefits outweigh the risks.…”

Section: Introduction mentioning

confidence: 99%

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Assessment of Computed Tomography Dose Index (CTDI) During CT Pelvimetry Using Monte Carlo Simulation

2023

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A pelvimetry examination is sometimes prescribed to a pregnant woman at the end of her pregnancy in order to assess the dimensions of her pelvis prior to childbirth. This examination has long been performed by using X-ray, but is now increasingly being replaced by CT-scan The objective of this study is to assess the radiation doses received during a practical CT pelvimetry examination performed using a Hitashi Supria 16-slice CT scanner. The radiation doses were estimated using Monte Carlo (MC)-based simulation with GATE code to model the 16-slice CT scanner machine. The GATE code operates using GEANT4 libraries. A polyymethyl metacrylate (PMMA) acrylic phantom of 32 cm diameter was modeled to represent the patient's body. X-ray energy spectrum generated using the SRS-78 spectrum processor was used for simulation. The simulation was executed with the same exposure parameters as the practical CT pelvimetry examination with dose parameters of 1 mGy, 0.9 mGy, and 36.6 mGy.cm, respectively, for the weighted CT dose index (CTDIw), the volume CT dose index (CTDIvol), and dose-length product (DLP). The MC simulation results provide dose parameters of 1.16 mGy, 1.07 mGy, and 43.6 mGy.cm, respectively, for the CTDIw, CTDIvol, and DLP. The differences between the simulation and the practical examination were 16 %, 18 %, and 18 %, respectively. These differences are considered in a quite good agreement. The results were also consistent with other similar studies. This work proves that the Monte Carlo simulation with the GATE code is usable to assess the patient doses during a CT pelvimetry examination.

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Section: Introduction mentioning

confidence: 98%

Section: Introduction mentioning

confidence: 99%

Assessment of Computed Tomography Dose Index (CTDI) During CT Pelvimetry Using Monte Carlo Simulation

2023

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“…Despite the growing number of CT machines in Morocco, the Diagnostic Reference Levels (DRL) have yet to be defined. Thus, several previous studies have shown a significant variation in the doses administered to patients for the same radiological examination procedure [ 20 - 26 ]. The aim of this pilot study at Hassan II Hospital of Agadir was to estimate the doses during radiation medical exposure of four CT scan procedures so that local diagnostic reference levels (DRLs) could be established.…”

Section: Introductionmentioning

confidence: 99%

Radiation doses during computed tomography scan imaging in Hassan II Hospital, Agadir, Morocco

Semghouli¹,

Amaoui²,

Wakrim³

2022

Pan Afr Med J

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Introduction the aim of this study was to establish local Diagnostic Reference Levels (DRLs) for four adult Computed Tomography (CT) examinations in the radiology department, Hassan II hospital of Agadir. Methods during this survey, we have examined the data of 200 patients at an average of 50 per localization. A General Electric 16 CT with automatic exposure control system was used to perform all CT examinations. Scanner acquisition parameters, number of series, contrast medium use, rotation time plus slice thickness, the displayed Computed Tomography Dose Index (CTDI vol ), and the Dose Length Product (DLP) were among the data collected for each diagnostic exam chosen. To evaluate the DRL and effective dose, the conversion factor and formalism of the International Commission on Radiological Protection (ICRP) were utilized. Results the average effective dose (Eeff), the displayed CT dose index (CTDI vol ), dose length product (DLP) were (7.28±2.35) mSv, (10.80±3.80) mGy and (428.35±138.26) mGy.cm respectively at chest CT. For abdomen-pelvis CT scan, there were (12.48±5.58) mSv, (9.30±2.99) mGy and (805.43±359.98) mGy. Those at chest abdomen-pelvic CT scan were (11.72±3.98) mSv, (10.82±2.53) mGy and (755.97±251.52) mGy.cm respectively. For lumbar CT, there were (12.12±2.32) mSv, (26.46±5.24) mGy and (787.00±149.37) mGy.cm respectively. Conclusion the findings of this study shows that our values are slightly higher than those of developed countries. This first-ever CT practice evaluation at Agadir's Hassan II Hospital reinforced the need for further radiology training for computed tomography practitioners on parameters influencing image quality, dose, and protocols improvement.

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Radiation risks during pediatric brain CT procedures in Morocco : A multicentre study

Semghouli

Amaoui

Aabid

et al. 2022

Materials Today: Proceedings

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Establishment of diagnostic reference level of abdominopelvic CT procedure of university hospital center Mohammed VI, Oujda

Cited by 4 publications

References 15 publications

Assessment of Computed Tomography Dose Index (CTDI) During CT Pelvimetry Using Monte Carlo Simulation

Assessment of Computed Tomography Dose Index (CTDI) During CT Pelvimetry Using Monte Carlo Simulation

Radiation doses during computed tomography scan imaging in Hassan II Hospital, Agadir, Morocco

Radiation risks during pediatric brain CT procedures in Morocco : A multicentre study

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