Measuring scatter radiation in diagnostic X rays for radiation protection purposes

Vlachos, Ioannis; Tsantilas, Xenophon; Kalyvas, N.; Delis, Harry; Kandarakis, I.; Panayiotakis, George

doi:10.1093/rpd/ncv093

Cited by 20 publications

(8 citation statements)

References 10 publications

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“…The backscattered dose increased more than eight times with increase in X-ray tube voltage from 50 to 110 kVp. This finding in agree with Vlachos et al (2015) [27] and Chiang et al (2020) [28] who illustrated the effect of xray tube voltage on dose rate due to the scatter radiation.…”

Section: Effect Of X-ray Tube Voltage On Backscattered Radiation Dosesupporting

confidence: 92%

Bio-Polymer Based Tragacanth Gum (TG) Loaded Fe3O4 Nanocomposite for the Sequestration of Tenacious Congo Red Dye from Waste Water

Naji¹,

Ali²

2020

J. Mater. Sci. Technol. Res.

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This paper estimates backscattered radiation doses at patient's positioning level (exposed object) using different X-ray tubes. The effects of different exposure sittings (X-ray tube voltage, exposure intensity, exposed area, dosimeter position, and distance between X-ray tube and imaged object surface) on backscattered radiation doses are estimated using different dosimeters and x-ray units. The quantity of recorded backscattered radiation dose -which reflects from patient's table or bucky to image receptor and exposed patient -is determined by the position of dosimeter between exposed object's table or bucky and X-ray tube according to backscatter angle, at higher backscattered angle, the dosimeter records more backscattered dose. The results showed that, increase in kVp, exposure intensity, and exposed area led to a concomitant increase in the quantity of backscattered radiation, whereas the Increase in distance between X-ray tube (source) and imaged object surface reduces the amount of backscattered radiation dose. As well as, there is no remarkable difference in recorded backscattered dose due to the position of X-ray tube or the direction of incident X-ray photons.

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Section: Effect Of X-ray Tube Voltage On Backscattered Radiation Dosesupporting

confidence: 92%

Bio-Polymer Based Tragacanth Gum (TG) Loaded Fe3O4 Nanocomposite for the Sequestration of Tenacious Congo Red Dye from Waste Water

Naji¹,

Ali²

2020

J. Mater. Sci. Technol. Res.

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“…Next, although the typical tube voltage of 120 kV was used in this study, CT examination with low tube voltage (i.e., 80 or 100 kV) is sometimes performed [16]. Since the amount of scattered X-ray depends on tube voltage [30], the radiation dose of medical staff would be evaluated on the safe side in this study. Finally, the personal dosimeter was set not on the eye position but on the side of the eye.…”

Section: Discussionmentioning

confidence: 99%

Occupational Radiation Dose, Especially for Eye Lens: Hp(3), in Medical Staff Members Involved in Computed Tomography Examinations

Osanai

Sato²,

Sato

et al. 2021

Applied Sciences

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Radiation dose management of medical staff has become increasingly important. Particularly, based on the statement by the International Commission on Radiological Protection (ICRP) in 2011, a new lower equivalent dose limit for the eye lens is being established in each country. Although many reports have discussed the occupational radiation dose in interventional radiology (IR), few studies have examined the dose during computed tomography (CT) examinations. This study investigated the radiation dose exposure to medical staff present in the CT room during irradiation, with particular focus on the exposure to eye lens. The radiation dose exposure to those who assist patients during head, chest and upper abdomen CT examination was measured in a phantom study. The radiation dose exposure with scattered radiation was never negligible (i.e., high); Hp(3) was the highest in head CT examination, at 0.44 mSv per examination. Furthermore, the shielding effect of radiation protection glasses was large, and radiation protection glasses are useful tools for the medical staff who are involved in CT examinations. The justification and optimisation should be carefully considered in assistant actions.

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“…19 All the measurements were carried out in freeze mode. 20 To measure leakage radiation from X-ray tube, the collimator diaphragms were closed completely and the tube was projected vertically downward. So, the tube is oriented in such a way that the anode is over the head of the table and the cathode is over the foot.…”

Section: Methodsmentioning

confidence: 99%

Investigation of conventional diagnostic X-ray tube housing leakage radiation using ion chamber survey meter in Mizoram, India

Lalrinmawia

Pau

Tiwari

2019

Sci Vis

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Leakage radiation that transmitted the protected X-ray tube housing was measured and compared with national and international safety standard. To the best of the authors’ knowledge, no tube housing leakage measurement has been done so far in the present study area. The authors considered all the conventional diagnostic X-ray units in Mizoram, India. Ion chamber survey meter was used to measure leakage radiation and it was placed at 5 different positions (left, right, front, back, top) of the X-ray tube. Measurements were done at 1 m focus-to-detector distance by projecting X-ray tube vertically downward with collimator diaphragms closed completely. SPSS statistics for windows, version 17.0 (SPSS, Inc., Chicago, IL, USA) was used to derived mean, standard error of the mean etc. The tube housing leakage exposure rates ranged between 0.03 mRh-1 and 500 mR h-1; among the 5 positions, rate measured in the front direction has the highest mean at 41.61±8.63 mR h-1; whereas the top has the lowest 4.57±1.16 mRh-1. Tube housing radiation level ranged from 0.01 to 58 mR in one hour. Leakage radiation was minimum at the top position of the tube and maximum in the front direction. All the equipment were in compliance with national and international standard norms, the highest leakage radiation level was 50.43% of the safety limit.

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Measuring scatter radiation in diagnostic X rays for radiation protection purposes

Cited by 20 publications

References 10 publications

Bio-Polymer Based Tragacanth Gum (TG) Loaded Fe3O4 Nanocomposite for the Sequestration of Tenacious Congo Red Dye from Waste Water

Bio-Polymer Based Tragacanth Gum (TG) Loaded Fe3O4 Nanocomposite for the Sequestration of Tenacious Congo Red Dye from Waste Water

Occupational Radiation Dose, Especially for Eye Lens: Hp(3), in Medical Staff Members Involved in Computed Tomography Examinations

Investigation of conventional diagnostic X-ray tube housing leakage radiation using ion chamber survey meter in Mizoram, India

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