Prospective Evaluation of the radiologist’s hand dose in CT-guided interventions.
| Autor: | Rogits B; Radiology and Nuclear Medicine, University Magdeburg., Jungnickel K, Löwenthal D, Kropf S, Nekolla EA, Dudeck O, Pech M, Wieners G, Ricke J |
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| Jazyk: | angličtina |
| Zdroj: | RoFo : Fortschritte auf dem Gebiete der Rontgenstrahlen und der Nuklearmedizin [Rofo] 2013 Nov; Vol. 185 (11), pp. 1081-8. Date of Electronic Publication: 2013 Jul 29. |
| DOI: | 10.1055/s-0033-1350368 |
| Abstrakt: | Purpose: Assessment of radiologist's hand dose in CT-guided interventions and determination of influencing factors. Materials and Methods: The following CT-guided interventions were included: Core biopsy, drainage, periradicular therapy, and celiac plexus neurolysis. The hand dose was measured with an immediately readable dosimeter, the EDD-30 (Unfors, Sweden). The default parameters for CT fluoroscopy were 120 kV, 90 mA and a 4 mm slice thickness. All interventions were performed on a 16-slice CT unit (Aquilion 16 Toshiba, Japan). The tumor size, degree of difficulty (1 - 3), level of experience and device parameters (mAs, dose-length product, scan time) were documented. Results: 138 CT-guided interventions (biopsy n = 99, drainage n = 23, pain therapy n = 16) at different locations (lung n = 41, retroperitoneum n = 53, liver n = 25, spine n = 19) were included. The lesion size was 4 - 240 mm (median: 23 mm). The fluoroscopy time per intervention was 4.6 - 140.2 s (median: 24.2 s). The measured hand dose ranged from 0.001 - 3.02 mSv (median: 0.22 mSv). The median hand dose for lung puncture (n = 41) was slightly higher (median: 0.32 mSv, p = 0.01) compared to that for the liver, retroperitoneum and other. Besides physical influencing factors, the degree of difficulty (p = 0.001) and summed puncture depth (p = 0.004) correlated significantly with the hand dose. Conclusion: The median hand dose for different CT-guided interventions was 0.22 mSv. Therefore, the annual hand dose limit would normally only be reached with about 2000 interventions. (© Georg Thieme Verlag KG Stuttgart · New York.) |
| Databáze: | MEDLINE |
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