Influence of exposure and geometric parameters on absorbed doses associated with common neuro-interventional procedures

Safari, M. J.; Wong, Jeannie Hsiu Ding; Jong, Wei Loong; Thorpe, Nathan; Cutajar, Dean L; Rosenfeld, Anatoly B.; Ng, Kwan Hoong

doi:10.1016/j.ejmp.2017.02.002

Cited by 6 publications

(3 citation statements)

References 39 publications

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“…Patient and physician awareness of radiation doses and their related risks is very low [9], despite the fact that human exposure to ionizing radiation comes second in importance to naturally occurring background radiation exposure [10][11][12][13]. Some studies have demonstrated that approximately 20% of primary care physicians believe that magnetic resonance imaging uses ionizing radiation.…”

Section: Introductionmentioning

confidence: 99%

Awareness of medical radiation exposure among patients: A patient survey as a first step for effective communication of ionizing radiation risks

et al. 2017

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A B S T R A C TIntroduction: The European Directive 2013/59/EURATOM requires patient radiation dose information to be included in the medical report of radiological procedures. To provide effective communication to the patient, it is necessary to first assess the patient's level of knowledge regarding medical exposure. The goal of this work is to survey patients' current knowledge level of both medical exposure to ionizing radiation and professional disciplines and communication means used by patients to garner information. Material and Methods: A questionnaire was designed comprised of thirteen questions: 737 patients participated in the survey. The data were analysed based on population age, education, and number of radiological procedures received in the three years prior to survey. Results: A majority of respondents (56.4%) did not know which modality uses ionizing radiation. 74.7% had never discussed with healthcare professionals the risk concerning their medical radiological procedures. 70.1% were not aware of the professionals that have expertise to discuss the use of ionizing radiation for medical purposes, and 84.7% believe it is important to have the radiation dose information stated in the medical report. Conclusion: Patients agree with new regulations that it is important to know the radiation level related to the medical exposure, but there is little awareness in terms of which modalities use X-Rays and the professionals and channels that can help them to better understand the exposure information. To plan effective communication, it is essential to devise methods and adequate resources for key professionals (medical physicists, radiologists, referring physicians) to convey correct and effective information.

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Section: Introductionmentioning

confidence: 99%

Awareness of medical radiation exposure among patients: A patient survey as a first step for effective communication of ionizing radiation risks

et al. 2017

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“…Furthermore, the maximum entrance skin dose is influenced by X-ray that directly enters. 18) However, when comparing the field of irradiation, the lens dose was slightly higher in the wide group. For imaging at a working angle, the site of treatment is located at the isocenter.…”

Section: Resultsmentioning

confidence: 89%

Measurement of Patient Lens Exposure during Cerebral Endovascular Treatment Using a Scintillation Optical Fiber Dosimeter

Kikuchi

Matsumoto

Nasada

et al. 2019

JNET

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It is difficult to predict lens radiation dose of the patients during neuroendovascular treatment due to various factors potentially affecting radiation dose such as a various working projection for individual procedures. The purpose of this study was to examine the association between the patient lens entrance dose (lens dose) during cerebral endovascular treatment and displayed dose on a system, as well as the influence of 3D imaging on lens exposure, and clarify factors influencing lens exposure. Methods: In patients who underwent cerebral endovascular treatment under general anesthesia between February and December 2017, the lens dose was measured using a real-time scintillation optical fiber dosimeter. The correlation between the lens dose and displayed dose on each system was analyzed. Furthermore, dose data were divided into fluoroscopy, DSA, and 3D imaging, and respective values as a percentage of the lens dose were calculated. Results: There was a strong correlation between the lens dose and Kerma Area Product (KAP) value. The lens dose was weakly correlated with the Air Kerma (AK) value and duration of fluoroscopy. 3D imaging for the visualization of a stent increased the value of 3D imaging as a percentage of the lens dose, and the lens dose increased with the frequency of imaging. In patients with a large field of irradiation after the establishment of a working angle, the lens dose increased. Conclusion: We evaluated the characteristics of the lens dose. In the future, the management of the lens dose should be examined.

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“…Rotating the frontal tube away from under the couch, the radiation dose to the occipital reduced by 40% and using the magnification modes increased radiation dose by 94%. Changing the image receptor to the phantom surface distance (10-40 cm) doubled the radiation dose to patient skin at the occipital region (19).…”

Section: Sánchez Rm Et Al (2016)mentioning

confidence: 99%

Eye lens dose measurement in patients during brain arteriovenous malformation interventional neuro-radiology procedure

Thana

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Brain arteriovenous malformation (AVM) interventional neuroradiology (INR) is a complicated procedure which the patients may receive the high radiation dose exceeding the threshold level for detectable eye lens opacities and cataracts (ICRP, 2012). The objectives of this study are to measure the patient eye lens dose using optically stimulated luminescence dosimeter, OSLD, during AVM INR procedure at Interventional Radiology Unit, Department of Radiology, King Chulalongkorn Memorial Hospital (KCMH) and to study the factors affecting the patient eye lens dose. NanoDot OSLDs were attached on the transparent radiation thin film eyewear and closed to the patient eyelids during the procedure. Philips Allura Clarity Xper FD20/15 biplane system has been used and parameters related to acquisition protocol were recorded. The size and site of brain AVM lesion and experience of interventional neuroradiologists were included. 32 AVM INR patients include 15 therapeutic and 17 diagnostic procedures were studied from August to December 2018. The results show that: therapeutic procedure, the average and range of patient left and right eye lens doses were 65.14 (17.88 111.70) and 29.62 (11.63 56.81) mGy, KAP at PA and lateral X-ray tubes were 112.05 (41.62 305.44) and 57.42 (19.73 102.99) Gycm2, AK at PA and lateral tubes were 1.80 (0.50 5.17) and 1.26 (0.38 2.98) Gy, and the exposure time was 77.15 (26.52 186.56) minutes. The average left eye lens dose was higher than the right eye. KAP, AK and total exposure time were correlated to patient eye lens dose by r = 0.60, 0.58, 0.44. The beam collimation, frame rate, angular and rotation of X-ray tube, the experience of specialist and complexity index of the procedure influence the patient eye lens dose. The average patient eye lens dose in a single procedure was less than 0.5 Gy, the threshold dose level of eye lens opacities and cataracts. The collimated irradiation area, reduce frame rate, speed and the short distance from flat panel detector to patient have been commonly selected, especially in patients with multiple procedures.

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Influence of exposure and geometric parameters on absorbed doses associated with common neuro-interventional procedures

Cited by 6 publications

References 39 publications

Awareness of medical radiation exposure among patients: A patient survey as a first step for effective communication of ionizing radiation risks

Awareness of medical radiation exposure among patients: A patient survey as a first step for effective communication of ionizing radiation risks

Measurement of Patient Lens Exposure during Cerebral Endovascular Treatment Using a Scintillation Optical Fiber Dosimeter

Eye lens dose measurement in patients during brain arteriovenous malformation interventional neuro-radiology procedure

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