The Challenges in the Estimation of the Effective Dose When Wearing Radioprotective Garments

Vargas, Clarita Saldarriaga; Struelens, Lara; Vanhavere, F.

doi:10.1093/rpd/ncx081

Cited by 8 publications

(14 citation statements)

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“…The protective effect of a 3 D surface – such as a protective apron covering the body – is significantly greater in the case of scatter radiation than that of a flat protective layer with a perpendicular angle of incidence. The parallel fields used in Ref 13 are only conditionally suitable for calculating protection factors for the real situation since the scatter radiation emitted by the patient at a short distance from the protective apron has a significantly flatter angle of incidence than parallel radiation, also refer to 10 .…”

Section: Discussionmentioning

confidence: 99%

“…In 13 the effective dose-based protection factors for the whole body F Geff including unprotected body parts (extremities, skull) are calculated. Unprotected body parts decrease the protective effect for the whole body.…”

Section: Discussionmentioning

confidence: 99%

“…Ref. 13 Monte-Carlo calculations for determining the effective dose based on a monochromatic parallel X-ray beam and an ICRP 110 reference model wearing a protective apron with a lead equivalent of 0.5 mm. The effective dose-based protection factors were calculated by dividing the effective dose without a protective apron by the effective dose with a protective apron.…”

Section: Studies To Datementioning

confidence: 99%

“…Ref. 13 Monte-Carlo-Berechnungen zur Ermittlung der effektiven Dosis unter Anwendung monochromatischer paralleler Strahlenbündel an einem ICRP 110-Referenzmodell, das mit einer Schutzschürze mit 0,5 mm PbGW bekleidet ist. Es wurden die Effektivdosis-basierten Schutzfaktoren als Quotient ohne/mit Schürze berechnet.…”

Section: Bisherige Arbeitenunclassified

“…Die Schutzwirkung einer Raumfläche – wie sie die am Körper getragene Schutzschürze darstellt – ist unter Streustrahlung erheblich größer als diejenige einer flachen Schutzschicht bei senkrechtem Einfall. Die in Ref 13 verwendeten Parallelfelder sind nur bedingt geeignet, Schutzfaktoren für die reale Situation zu berechnen, da die vom Patienten ausgehende Streustrahlung bei kurzer Entfernung zur Schutzschürze wesentlich flachere Einfallswinkel erzeugt als Parallelstrahlung, siehe u. a. 10 .…”

Section: Diskussion Und Schlussfolgerungenunclassified

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X-Ray Protective Aprons Re-Evaluated

Eder

2023

Rofo

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Background The evaluation of the protective effect of X-ray protective clothing requires new criteria. The current concept assumes more or less uniform covering of the torso with protective material. The frequently worn heavy wrap-around aprons can weigh 7 to 8 kg. As relevant studies show, orthopedic damage can result from long-term activity. It should therefore be investigated whether the apron weight can be reduced by optimizing the material distribution. For a radiobiological evaluation of the protective effect, the “effective dose” should be used. Methods Numerous laboratory measurements were performed with an Alderson Rando phantom as well as dose measurements on clinical personnel. The measurements were supplemented by Monte Carlo simulation of an interventional workplace in which a female ICRP reference phantom was used for the operator. The measured back doses on the Alderson phantom as well as the measured back doses at interventional workplaces were based on the personal equivalent dose Hp(10). Monte Carlo simulations were used to introduce protection factors for the protective clothing based on the “effective dose” introduced in radiation protection. Results Back doses in clinical radiology personnel are largely negligible. Therefore, back protection can be much lower than currently used or can even be eliminated. The Monte Carlo simulations show that the protective effect of protective aprons worn on the body is higher than when the flat protective material is radiated through (3 D effect). About 80 % of the effective dose is attributed to the body region from the gonads to the chest. By additional shielding of this area, the effective dose can be lowered or, optionally, aprons with less weight can be produced. Attention must also be paid to the “radiation leaks” (upper arms, neck, skull), which can reduce the whole-body protective effect. Conclusion In the future, the evaluation of the protective effect of X-ray protective clothing should be based on the effective dose. For this purpose, effective dose-based protection factors could be introduced, while the lead equivalent should be used for measurement purposes only. If the results are implemented, protective aprons with approx. 40 % less weight can be produced with a comparable protective effect. Key Points: Citation Format

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Studies To Datementioning

confidence: 99%

Section: Bisherige Arbeitenunclassified

Section: Diskussion Und Schlussfolgerungenunclassified

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