Comparison of peak skin dose and dose map obtained with real-time software and radiochromic films in patients undergoing abdominopelvic embolization - 02/07/22
, Asmaa Belaouni a, Djamel Dabli a, b, Jean Goupil a, Romain Perolat a, Philippe Akessoul a, Tarek Kammoun a, Adel Hoballah a, Jean Paul Beregi a, Julien Frandon a
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Highlights |
• | A substantial correlation is found between the peak skin dose computed with the Dose Tracking System software and that obtained using radiochromic film. |
• | Similar dose maps are found with the Dose Tracking System software and radiochromic films for patients undergoing abdominal embolization. |
• | For all patients undergoing abdominal embolization, peak skin doses are significantly lower with Dose Tracking System software than with radiochromic film. |
ABSTRACT |
Purpose |
The purpose of this study was to compare peak skin dose (PSD) and dose map calculated by Dose-Tracking-System® (DTS) software and measured with radiochromic films in patients undergoing abdominopelvic embolization.
Material and methods |
The PSD measured by radiochromic films (PSDFilm) or calculated by DTS software (PSDDTS) were compared in patients who underwent abdominopelvic embolization between September 2020 and April 2021. Concordance between PSDFilm and PSDDTS was computed using the Lin's concordance correlation coefficient and the clinical concordance using Bland Altman analysis. PSD values were compared using the paired Mann-Whitney-Wilcoxon test.
Results |
A total of 40 patients were included. There were 32 men and 8 women with a mean age of 73.0 ± 14.6 (SD) years (age range: 30–92 years). Median PSDFilm was 756 mGy (IQR: 390; 1094) and median PSDDTS was 768 mGy (IQR: 421; 1076), resulting in a median difference of -5% (IQR: -10%; 0%) between PSDFilm and PSDDTS (P = 0.024). The concordance correlation between PSDFilm and PSDDTS was substantial in patients (0.986; 95% CI: 0.977–0.992). Bland Altman analysis showed that PSDDTS was underestimated compared to PSDFilm by -36 mGy (95% CI: -68–-4). Visually similar dose maps were found with DTS and radiochromic films.
Conclusion |
Real-time DTS software allows computing PSD with high accuracy and generating adequate dose map. PSDDTS was slightly underestimated compared to PSDFilm requiring the use of a correction factor for the PSDDTS to avoid lack of follow-up for some patients.
Le texte complet de cet article est disponible en PDF.Keywords : Embolization, Fluoroscopy, Film dosimetry, Interventional radiology, Radiochromic films
Abbreviations : CI, CT, DLP, DTS, IRP, IQR, Ka, KAP, PACS, PSD, Q1, Q3, SD, SDC, TACE, VERIDIC
Plan
Vol 103 - N° 7-8
P. 338-344 - juillet 2022 Retour au numéro
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