Abschätzung der Strahlenbelastung bei interventionellen neuroradiologischen Eingriffen am Kopf von Kindern im Vergleich zur Exposition erwachsener Patienten

Hentschel, Frank; Habermaas, Irmtraut; Bień, Stanisław; Seeger, W.

doi:10.1055/s-2007-1015735

Cited by 4 publications

(2 citation statements)

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“…However, there are very few published data on radiation doses from non-cardiac pediatric interventional fluoroscopy procedures (23–27). In two studies (24, 27), entrance dose or dose to the skin was assessed after neuroradiological procedures, but in neither study was dose to the brain estimated. To provide estimates of brain doses in pediatric patients who have had interventional neuroradiology procedures, we analyzed dosimetric data from pediatric patients included in the Radiation Doses in Interventional Radiology Study (RAD-IR) over a period of 3 years in seven U.S. medical centers (28–30).…”

Section: Introductionmentioning

confidence: 99%

Radiation Dose to the Brain and Subsequent Risk of Developing Brain Tumors in Pediatric Patients Undergoing Interventional Neuroradiology Procedures

et al. 2008

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Radiation dose to the brain and subsequent lifetime risk of diagnosis of radiation-related brain tumors were estimated for pediatric patients undergoing intracranial embolization. Average dose to the whole brain was calculated using dosimetric data from the Radiation Doses in Interventional Radiology Study for 49 pediatric patients who underwent neuroradiological procedures, and lifetime risk of developing radiation-related brain tumors was estimated using published algorithms based on A-bomb survivor data. The distribution of absorbed dose within the brain can vary significantly depending on field size and movement during procedures. Depending on the exposure conditions and age of the patient, organ-averaged brain dose was estimated to vary from 6 to 1600 mGy. The lifetime risk of brain tumor diagnosis was estimated to be increased over the normal background rates (57 cases per 10,000) by 3 to 40% depending on the dose received, age at exposure, and gender. While significant uncertainties are associated with these estimates, we have quantified the range of possible dose and propagated the uncertainty to derive a credible range of estimated lifetime risk for each subject. Collimation and limiting fluoroscopy time and dose rate are the most effective means to minimize dose and risk of future induction of radiation-related tumors.

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Section: Introductionmentioning

confidence: 99%

Radiation Dose to the Brain and Subsequent Risk of Developing Brain Tumors in Pediatric Patients Undergoing Interventional Neuroradiology Procedures

et al. 2008

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“…21 Clinical studies state dose rates from 5 mGy/min up to 90 mGy/min. [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] We call the reconstructed volumes time frames, and denote a specific time frame as TF m with 1 ≤ m ≤ M and M being the total number of time steps during the whole intervention. The high image quality of the time frames is achieved by using a prior volume acquired before intervention.…”

Section: A Workflow Of Tomographic Fluoroscopymentioning

confidence: 99%

Low dose tomographic fluoroscopy: 4D intervention guidance with running prior

et al. 2013

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Patient and occupational dose in neurointerventional procedures

et al. 2002

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Neurointerventional procedures can involve very high doses of radiation to the patient. Our purpose was to quantify the exposure of patients and workers during such procedures, and to use the data for optimisation. We monitored the coiling of 27 aneurysms, and embolisation of four arteriovenous malformations. We measured entrance doses at the skull of the patient using thermoluminescent dosemeters. An observer logged the dose-area product (DAP), fluoroscopy time and characteristics of the digital angiographic and fluoroscopic projections. We also measured entrance doses to the workers at the glabella, neck, arms, hands and legs. The highest patient entrance dose was 2.3 Gy, the average maximum entrance dose 0.9+/-0.5 Gy. The effective dose to the patient was estimated as 14.0+/-8.1 mSv. Other average values were: DAP 228+/-131 Gy cm(2), fluoroscopy time 34.8+/-12.6 min, number of angiographic series 19.3+/-9.4 and number of frames 267+/-143. The highest operator entrance dose was observed on the left leg (235+/-174 microGy). The effective dose to the operator, wearing a 0.35 mm lead equivalent apron, was 6.7+/-4.6 microSv. Thus, even the highest patient entrance dose was in the lower part of the range in which nonstochastic effects might arise. Nevertheless, we are trying to reduce patient exposure by optimising machine settings and clinical protocols, and by informing the operator when the total DAP reaches a defined threshold. The contribution of neurointerventional procedures to occupational dose was very small.

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Abschätzung der Strahlenbelastung bei interventionellen neuroradiologischen Eingriffen am Kopf von Kindern im Vergleich zur Exposition erwachsener Patienten

Cited by 4 publications

References 0 publications

Radiation Dose to the Brain and Subsequent Risk of Developing Brain Tumors in Pediatric Patients Undergoing Interventional Neuroradiology Procedures

Radiation Dose to the Brain and Subsequent Risk of Developing Brain Tumors in Pediatric Patients Undergoing Interventional Neuroradiology Procedures

Low dose tomographic fluoroscopy: 4D intervention guidance with running prior

Patient and occupational dose in neurointerventional procedures

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