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. 2021 Oct;48(10):6152-6159.
doi: 10.1002/mp.15132. Epub 2021 Aug 9.

Dosimetry on first clinical dark-field chest radiography

Manuela Frank  1 , Theresa Urban  1 , Konstantin Willer  1 , Wolfgang Noichl  1 , Fabio De Marco  1 , Rafael Schick  1 , Bernhard Gleich  1 , Alexander Schegerer  2 , Ursula Lechel  2 , Pascal Meyer  3 , Juergen Mohr  3 , Thomas Koehler  4 , Andre Yaroshenko  5 , Ingo Maack  5 , Thomas Pralow  5 , Roland Proksa  4 , Bernhard Renger  6 , Peter Noël  6 , Alexander Fingerle  6 , Daniela Pfeiffer  6 , Ernst Rummeny  6 , Julia Herzen  1 , Franz Pfeiffer  1   6
Affiliations

Dosimetry on first clinical dark-field chest radiography

Manuela Frank et al. Med Phys. 2021 Oct.

Erratum in

Abstract

Purpose: The purpose of this study was to evaluate the dose characteristic for patient examinations at the first clinical X-ray dark-field chest radiography system and to determine whether the effective patient dose is within a clinically acceptable dose range.

Methods: A clinical setup for grating-based dark-field chest radiography was constructed and commissioned, operating at a tube voltage of 70 kVp. Thermoluminescent dosimeter (TLD) measurements were conducted using an anthropomorphic phantom modeling the reference person to obtain a conversion coefficient relating dose area product (DAP) to effective patient dose at the dark-field system. For 92 patients, the DAP values for posterior-anterior measurements were collected at the dark-field system. Using the previously determined conversion coefficient, the effective dose was calculated.

Results: A reference person, modeled by an anthropomorphic phantom, receives an effective dose of 35 µSv. For the examined patients, a mean effective dose of 39 µSv was found.

Conclusions: The effective dose at the clinical dark-field radiography system, generating both attenuation and dark-field images, is within the range of reported standard dose values for chest radiography.

Keywords: TLD; X-ray dark-field; dosimetry; radiation dose.

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