Relative response of dosimeters to variations in scattered X-ray energy spectra encountered in interventional radiology

Masterson, Maeve; Cournane, Seán; McWilliams, Nina; Maguire, Danielle; McCavana, Jackie; Lucey, Julie

doi:10.1016/j.ejmp.2019.11.002

Cited by 11 publications

(8 citation statements)

References 24 publications

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“…Our observation of X-rays scattered from the angiography equipment seems reasonable, considering the results obtained by Masterson et al [18]. The difference in the tube voltage applied may have led to a higher the mean energy of X-rays.…”

Section: Jrprsupporting

confidence: 89%

“…5, the pulse height spectra and the corresponding photon fluence rate spectra were measured at the position of the physician's eye during the angiography procedures. Several studies have reported that the appropriate introduction of a ceiling-suspended shield significantly reduced the scattered X-rays from the patient [3,18,21]. In the present study as well, the use of a ceiling plate between the ISO water phantom and the CZT detector drastically reduced the scattered X-rays reaching the measurement position.…”

Section: ) Angiographysupporting

confidence: 71%

“…The difference in the tube voltage applied may have led to a higher the mean energy of X-rays. The tube voltage applied in this study (65 kVp) was higher than that used in the study performed in [18]. In Masterson et al, the peak shifted higher as the tube voltage increased from 60 to 74 kVp.…”

Section: Jrprmentioning

confidence: 55%

“…Our study revealed that the eye lenses of the intensive care physicians were highly exposed during the procedure [16]. Physicians who perform manipulations with fluoroscopic guidance, especially interventional radiologists and cardiologists, were also subject to exposure of the eye lens [2,3,15,17,18]. Two procedures with long duration-cardiac angiography and endoscopic retrograde cholangiopancreatography (ERCP)-are representative of the types of procedures that expose the eye lenses of physicians to high doses [19].…”

Section: X-ray Therapeutic and Diagnosis Equipment And Typical Practicesmentioning

confidence: 95%

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Experimental Evaluation of Scattered X-Ray Spectra due to X-Ray Therapeutic and Diagnosis Equipment for Eye Lens Dosimetry of Medical Staff

et al. 2022

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Background: For proper monitoring of the eye lens dose, an appropriate calibration factor of a dosimeter and information about the mean energies of X-rays are indispensable. The scattered X-ray energy spectra should be well characterized in medical practices where eye lenses of medical staffs might be high.Materials and Methods: Scattered X-ray energy spectra were experimentally derived for three different types of X-ray diagnostic and therapeutic equipment, i.e., the computed tomography (CT) scan, the angiography and the fluoroscopy. A commercially available CdZnTe (CZT) spectrometer with a lead collimator was employed for the measurement of scattered X-rays, which was performed in the usual manner.Results and Discussion: From the obtained energy spectra, the mean energies of the scattered X-rays lied between 40 and 60 keV. This also agreed with that obtained by the conventional half value layer method.Conclusion: The scattered X-rays to which medical workers may be exposed in the region around the eyes were characterized by means of spectrometry. The obtained mean energies of the scattered X-rays were found to match the flat region of the dosimeter response.

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Section: Jrprsupporting

confidence: 89%

Section: ) Angiographysupporting

confidence: 71%

Section: Jrprmentioning

confidence: 55%

Section: X-ray Therapeutic and Diagnosis Equipment And Typical Practicesmentioning

confidence: 95%

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Experimental Evaluation of Scattered X-Ray Spectra due to X-Ray Therapeutic and Diagnosis Equipment for Eye Lens Dosimetry of Medical Staff

et al. 2022

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“…Assuming a dose reduction factor (DRF) of 2 for the protective eyewear, the lens dose by the collar dosimeter will be overestimated by a factor of 2. The third dosimeter behind the protective eyewear is expected to monitor the lens doses more accurately than the collar dosimeter as it can reflect the shielding effect of the protective glasses [19][20][21]. It would be helpful in critical cases, such as the staff who are likely to be exposed to a dose exceeding the limit.…”

Section: Dosimetry Of the Lens Of The Eyementioning

confidence: 99%

Radiation Protection of the Eye Lens in Fluoroscopy-guided Interventional Procedures

Akahane

Yoshioka

Kiryu

2022

Interventional Radiology

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The medical staff involved in fluoroscopy-guided procedures are at potential risks of radiation-induced cataract. Therefore, proper monitoring of the lens doses is critical, and radiation protection should be provided to the maximum extent that is reasonably achievable. The collar dosimeter is necessary to avoid underestimation of the lens dose, and the third dosimeter behind the protective eyewear would be helpful for those who are likely to exceed the dose limit. The reduction of the patient doses will correspondingly reduce the staff doses. Proper placement of the ceiling-mounted shields and minimization of the face-to-glass gap are the keys to effective shielding. The optimization of procedures and devices that help maintain a distance from the irradiated area and to prevent the looking-up posture will substantially reduce the lens dose.

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The 10th Annual scientific Meeting of the Irish Association of physicists in medicine (IAPM ASM 2019)

et al. 2020

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Relative response of dosimeters to variations in scattered X-ray energy spectra encountered in interventional radiology

Cited by 11 publications

References 24 publications

Experimental Evaluation of Scattered X-Ray Spectra due to X-Ray Therapeutic and Diagnosis Equipment for Eye Lens Dosimetry of Medical Staff

Experimental Evaluation of Scattered X-Ray Spectra due to X-Ray Therapeutic and Diagnosis Equipment for Eye Lens Dosimetry of Medical Staff

Radiation Protection of the Eye Lens in Fluoroscopy-guided Interventional Procedures

The 10th Annual scientific Meeting of the Irish Association of physicists in medicine (IAPM ASM 2019)

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