Characterisation of grids of point detectors in maximum skin dose measurement in fluoroscopically-guided interventional procedures

The work programme of EURADOS on internal and external dosimetry

“…The work of SG2 is dedicated to patient dosimetry for interventional procedures in cardiology and radiology, as well as dosimetry in cone beam computed tomography (CBCT) imaging. As the number and complexity of interventional cardiology (IC) procedures have been growing steadily, it has become crucial to provide patient-specific skin dose estimates during IC procedures (Dabin et al., 2015; Farah et al., 2015). The aim of this research is to foster the harmonisation of a radiation dose structured report, and to validate skin dose calculation software (by acceptance testing and developing quality control protocols) in IC, which will help to develop patient-specific dosimetry and optimise radiation protection.…”

Feasibility of setting up generic alert levels for maximum skin dose in fluoroscopically guided procedures

“…TLD measurements were done with a uniform grid size of 140 × 40 cm 2 (86 TLDs in total and 5.7 cm inter-chip spacing). This grid spacing was selected based on results of Dabin et al [16], as a balance between spatial resolution and dosimeter preparation workload. TLDs were read according to participants own routine procedures.…”

“…The MSD value was estimated from the highest chip record. In order to take into account the median underestimation of MSD due to the finite grid spacing, the MSD value was corrected based on results of Dabin et al [16]. In that study, the authors used film measurements and numerical simulations of TACE, PCI and NE procedures to evaluate the MSD underestimation associated with the use of TLD grids.…”

“…The complexity and heterogeneity of skin exposure in interventional procedures require, however, careful characterization of these detectors. Previous studies [14][15][16][17][18] documented a comprehensive characterization of XR-RV3 GafChromic® films (International Specialty Products) and MCP-N (LiF:Mg, Cu, P) or MTS-N (LiF:Mg, Ti) TLDs and TL foils in laboratory and in clinical conditions. Gafchromic films are associated with relatively large measurement uncertainties, which could exceed 20% (coverage factor k = 1) [15,18].…”

“…Meanwhile, TLDs proved to provide slightly better accuracy than films for skin dose measurement with uncertainties within 20% (k = 1) mainly due to their lower energy dependence [17]. However, the use of TLDs or other point detectors involves a high risk of missing the MSD and careful setting of the detectors is required [16]. TL foils seem promising since they combine the good spatial resolution of gafchromic films and the lower energy dependence of TLD.…”