Introducing PySkinDose, a novel framework for patient peak skin dose estimation in interventional radiology

Congress:

EuroSafe Imaging 2020

Poster Number:

ESI-00814

Type:

EuroSafe Imaging

Keywords:

Action 9 - Facilitation of research in advanced topics of radiation protection, Interventional non-vascular, Interventional vascular, Radioprotection / Radiation dose, Fluoroscopy, Dosimetry, Radiation effects, Radiation safety, Dosimetric comparison, Quality assurance, Retrospective, Not applicable, Performed at one institution

Authors:

M. Hellström, C. Granberg, J. Lundman, K. Ahlström Riklund, J. S. Andersson

DOI:

10.26044/esi2020/ESI-00814

DOI-Link:

https://dx.doi.org/10.26044/esi2020/ESI-00814

Fig. 3: A print screen of the dose map visualizer in PySkinDose. After calculations,...

Fig. 5: A print screen of the irradiation event visualizer in PySkinDose. Each...

Fig. 7: QR code link to the project repository.

Background/introduction

During interventional radiology (IR) procedures, X-ray induced skin injuries may occur due to high absorbed patient skin doses. In some complicated interventions, the skin doses to patients approach the levels of some radiotherapy treatments, which can result in acute skin injuries such as erythema, permanent epilation and delayed skin necrosis [1]. The cumulated absorbed dose to skin varies spatially over the skin surface of the patient due to procedure-specifics such as beam-angulation and table position. The peak value of the procedure cumulative absorbed dose to...

Description of activity and work performed

Pertinent correction methods and data for PSD estimation were summarised by literature review and in-house measurements.This includes Monte Carlo based conversion of air Kerma to absorbed skin dose [2], Monte Carlo based backscattering [2,3], and the geometry related factors for skin exposure mapping with modern IR equipment [4]. In-house measurements of X-ray tube filtration and patient support table and pad transmission were conducted as well as beam quality simulations in order to gather all required inputs for the PSD calculation. A skin dose calculation model...

Conclusion and recommendations

Patient PSD estimations with IR procedures are assisted by information from RDSR and correction of physical dependencies. With refined PSD estimates, such as the one provided in the PySkinDose framework, patient follow-up after IR procedures are improved by providing relevant action levels to clinicians. Absolute dose measurements should be conducted to validate PySkinDose PSD estimation. PySkinDose can also be used for optimisation purposes since the RDSR contain useful data on how anatomical protocol settings are used in the clinical workflow. Data extraction and visualisation can...

Personal/organisational information

J. S. Andersson; Umeå/SE - Founder at Dicom Port K. Riklund; Umeå/SE - nothing to disclose J. Lundman; Umeå/SE - Founder at Dicom Port C. Granberg; Umeå/SE - nothing to disclose M. Hellström; Umeå/SE - nothing to disclose

References

Valentin, J. (2000). Avoidance of radiation injuries from medical interventional procedures: ICRP Publication 85. In Annals of the ICRP (Vol. 30, pp. 7–67). https://doi.org/10.1016/S0146-6453(01)00004-5 Benmakhlouf, H., Bouchard, H., Fransson, A., & Andreo, P. (2011). Backscatter factors and mass energy-absorption coefficient ratios for diagnostic radiology dosimetry. Physics in Medicine and Biology, 56(22), 7179–7204. https://doi.org/10.1088/0031-9155/56/22/012 Benmakhlouf, H., Fransson, A., & Andreo, P. (2013). Influence of phantom thickness and material on the backscatter factors for diagnostic x-ray beam dosimetry. Physics in Medicine and Biology, 58(2), 247–260. https://doi.org/10.1088/0031-9155/58/2/247 Khodadadegan,...