Patient dose assessment due to fluoroscopic exposure for some selected fluoroscopic procedures in Ghana

Gyekye, Prince Kwabena; Schandorf, Cyril; Boadu, Mary; Yeboah, Joseph Yaw; Amoako, J. K.

doi:10.1093/rpd/ncp172

Cited by 9 publications

(4 citation statements)

References 4 publications

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“…[1–4] A pregnant patient has a right to know the magnitude and type of potential radiation effects that might result from in utero exposure. Fetal doses below 100 mGy should not be considered a reason for terminating a pregnancy due to prenatal death, malformation or impairment of mental development of the fetus.…”

Section: Introductionmentioning

confidence: 99%

“…[12] The program calculates the effective dose using recommendations of the International Commission on Radiological Protection (ICRP) publication 60[13] with some modifications to the quantity from ICRP publication 73. [41214] The ICRP publication 60 has been superseded by ICRP publication 103, with modifications to the tissue weighting factors for the breast, which has been increased from 0.05 to 0.12, while that of the gonads has been reduced from 0.20 to 0.05. There has also been modification to the weighting factor for the “remainder tissue” and the inclusion of two more tissues, i.e.…”

Section: Introductionmentioning

confidence: 99%

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Cancer incidence risks to patients due to hysterosalpingography

et al. 2012

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Cancer incidence estimates and dosimetry of 120 patients undergoing hysterosalpingography (HSG) without screening at five rural hospitals and with screening using image intensifier-TV at an urban hospital have been studied. Free in air kerma measurements were taken for patient dosimetry. Using PCXMC version 1.5, organ and effective doses to patients were estimated. Incidence of cancer of the ovary, colon, bladder and uterus due to radiation exposure were estimated using biological effects of ionising radiation committee VII excess relative risk models. The effective dose to patients was estimated to be 0.20 ± 0.03 mSv and 0.06 ± 0.01 mSv for procedures with and without screening, respectively. The average number of exposures for both procedures, 2.5, and screening time of 48.1 s were recorded. Screening time contributed majority of the patient doses due to HSG; therefore, it should be optimised as much as possible. Of all the cancers considered, the incidence of cancer of the bladder for patients undergoing HSG procedures is more probable.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cancer incidence risks to patients due to hysterosalpingography

et al. 2012

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“…The values of conversion coefficient between the effective dose and incident collision kerma K air integrated over beam area CC E (mSv Gy −1 cm −2 ) for patients of different age groups (from newborn to adult) were adopted from literature. 5,6,[29][30][31][32][33][34][35][36] They were calculated using the Monte Carlo method and most of them corresponded to the computational MIRD-5-type stylized models and tissue weighting factors from Publication 60 ICRP. For some x-ray examination, we did not find CC E values based on other types of computational body models in the available literature.…”

Section: B Input Data For the Approximation Of The Conversion Coefmentioning

confidence: 99%

Technical Note: Patient‐weight dependence of the effective dose conversion coefficients for diagnostic x‐ray imaging procedures

Голиков

Дружинина

2020

Medical Physics

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The aim of this study was to provide a method and reference data for the evaluation of the weight dependence of the conversion coefficients from air collision kerma integrated over beam area to the effective dose for patients undergoing diagnostic x-ray examinations. Method: A simple physics-based analytical model was developed in order to calculate the weight dependence of the effective dose conversion coefficients based on existing values of the conversion coefficients between patient effective dose and air collision kerma integrated over beam area calculated by the Monte Carlo method on the base of computational MIRD-5-type stylized models. Results: The analytical expressions that make possible taking into account a patient's weight when assessing the effective dose were presented. The following categories of diagnostic x-ray examinations are considered: CT; plain radiography; cardiac angiography; fluoroscopy. The results indicate that the weight dependence of the effective dose conversion coefficients for different categories of diagnostic x-ray examinations has the same form. Correction factor for evaluation of the new value of the effective dose conversion coefficient for a patient with weight W pa. when we know its value for a standard patient with weight W st. depends on the ratios of their weights (W st. /W pat.) and fractions of the incident energy which is imparted to a patient. Conclusions: The paper presents an approach and necessary data for the estimation of the weight dependence of the effective dose conversion coefficients for patients undergoing different diagnostic x-ray examinations.

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“…Fluoroscopy examinations have become more common in diagnostic radiology since the 20 th century due to the wide application of interventional and contrast studies to functionally study the human anatomy and assist the treatment of pathologies [1,2] . However, the occupational dose was found the highest during the procedures involving the use of fluoroscopy units as shown in previous research studies [3,4] .…”

Section: Clinical Applications Of Fluoroscopy and Its Radiation Dosementioning

confidence: 99%

Simulation, visualization and dosimetric validation of scatter radiation distribution under fluoroscopy settings

Chan

Cheung

et al. 2015

JBEI

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Objective: This study developed a three-dimensional visualization method for presenting the geometric pattern of the relative dose generated by Monte Carlo (MC) simulation and validated the simulated dose values against the physical measurement. Methods:In fluoroscopy and interventional radiology examinations, relatively high level of occupational dose is delivered to healthcare workers due to prolonged radiation exposure in imaging procedures. As the spatial difference in dose is never negligible, the scatter radiation distribution under fluoroscopic exposures is thus worth investigating. MC simulation is a sophisticated statistical method, which has been widely applied for modeling scatter radiation in general X-ray examination room. However, the application and validation of MC simulation under fluoroscopy setting have not been found yet. In this study, a stack of tissue equivalent slabs were used as the object under fluoroscopic irradiation. EGSnrc-based DOSXYZnrc code was applied to simulate the scatter dose distribution and the physical measurement of radiation dose was performed using an ionization chamber radiation detector.Results: At 19 representative locations taking into account the work area and radiosensitive organs of healthcare workers, the trend compliance of the simulated with the measured dose values was examined using the correlation analysis. A significant monotonic association between the MC simulation and physical measurement of dose values was identified (r s =0.822 and P<.01). At the same horizontal distance from the irradiation axis, it was observed that the air dose was relatively higher at the level of gonad region than at the eye level. Conclusions:The proposed visualization approach illustrates a three dimensional dose simulation in local display density, which arouses the awareness about prolonged radiation exposure in clinical environment. The reliability and validity of the simulation were examined.

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Patient dose assessment due to fluoroscopic exposure for some selected fluoroscopic procedures in Ghana

Cited by 9 publications

References 4 publications

Cancer incidence risks to patients due to hysterosalpingography

Cancer incidence risks to patients due to hysterosalpingography

Technical Note: Patient‐weight dependence of the effective dose conversion coefficients for diagnostic x‐ray imaging procedures

Simulation, visualization and dosimetric validation of scatter radiation distribution under fluoroscopy settings

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