APPLICATION OF HAND PHANTOMS IN SIMULATIONS TO DETERMINE THE RADIATION EXPOSURE OF MEDICAL STAFF

Transcription

1 APPLICATION OF HAND PHANTOMS IN SIMULATIONS TO DETERMINE THE RADIATION EXPOSURE OF MEDICAL STAFF Frank Becker 1, Christoph Blunck 1, Catarina Figueira 2, Fabian Göpfert 1 1 Karlsruhe Institute of Technology, KIT, Germany 2 Radiological Protection and Safety Unit, IST/ITN, Portugal INSTITUTE FOR NUCLEAR WASTE DISPOSAL - RADIATION PROTECTION RESEARCH KIT Universität des Landes Baden-Württemberg und nationales Forschungszentrum in der Helmholtz-Gemeinschaft

2 CT-Fluoroscopy staff dosimetry December 2009 Thousands of New Cancers Predicted Due to Increased Use of CT Doses Higher and More Variability Women Face Greater Risk Thousands of Future Cancers? CMPWG Nara, Japan - Frank Becker et al.

3 CT-Fluoroscopy - staff dosimetry Typical situation in CT fluoroscopy (Siemens) CMPWG Nara, Japan - Frank Becker et al.

4 CT-Fluoroscopy - staff dosimetry CTF biopsy showing biopsy needle and lesion (Katada, Fujita Health University, JP) CMPWG Nara, Japan - Frank Becker et al.

5 CT-Fluoroscopy - staff dosimetry * Scattered dose rates to equipment operator from CT (Exposure parameters: 120 kv, 50 ma) * New recommendation limit 20 msv : 50 procedures CMPWG Nara, Japan - Frank Becker et al.

6 CT-Measurements and Simulations => EURADOS Measurements and Simulations => Handphantoms CMPWG Nara, Japan - Frank Becker et al.

7 Measurements with Handphantoms phantom from LPS Berlin CMPWG Nara, Japan - Frank Becker et al.

8 Typical Dose Distribution H p (0.07) on Hands Simulations useful to reveal the overall/maximum dose distribution? CMPWG Nara, Japan - Frank Becker et al.

9 CT-Fluoroscopy - staff dosimetry CT devices in Karlsruhe and Coimbra CMPWG Nara, Japan - Frank Becker et al.

10 CT-Fluoroscopy - staff dosimetry Measurements in Karlsruhe and Coimbra (cont.) CMPWG Nara, Japan - Frank Becker et al.

11 CT-Fluoroscopy - staff dosimetry Simulations in of the scenarios validation of two programs C. Figueira: MCNPX Voxel Phantoms from DICOM-Files Rotational movement simulated by 36 source positions F. Göpfert: GMctdospp developed by Ralph Schmidt, Giessen GUI to handle EGSnrc Rotation mode in EGSnrc available DICOM-Files directly accepted in DICOM-RT- STRUCT format CMPWG Nara, Japan - Frank Becker et al.

12 CT-Fluoroscopy - staff dosimetry DICOM-Files CMPWG Nara, Japan - Frank Becker et al.

13 CT-Fluoroscopy - staff dosimetry MCNPX CMPWG Nara, Japan - Frank Becker et al.

14 CT-Fluoroscopy - staff dosimetry GMctdospp CMPWG Nara, Japan - Frank Becker et al.

15 CT-Fluoroscopy - staff dosimetry Placing TLDs in DICOM-RT-STRUCT files with the program Prosoma CMPWG Nara, Japan - Frank Becker et al.

16 CT-Fluoroscopy - staff dosimetry Simulations Measurements CMPWG Nara, Japan - Frank Becker et al.

17 CT-Fluoroscopy - staff dosimetry Strong beam spot influence (simulations) CMPWG Nara, Japan - Frank Becker et al.

18 CT-Fluoroscopy - staff dosimetry Beamspot Dosimeters Simulations CMPWG Nara, Japan - Frank Becker et al.

19 Methods Ch. Blunck, PhD Thesis Reales Szenario Handmodell Modell der radioaktiven Quelle 3-D Informationen Modellierung Übereinstimmung Simulation CMPWG Nara, Japan - Frank Becker et al.

20 Markers and Position Tracking CMPWG Nara, Japan - Frank Becker et al.

21 Dose Rate during Injection CMPWG Nara, Japan - Frank Becker et al.

22 Dose Rate during Injection 2.7 s CMPWG Nara, Japan - Frank Becker et al.

23 Dose Rate during Injection 17.3 s CMPWG Nara, Japan - Frank Becker et al.

24 Dose Rate during Injection 24.0 s CMPWG Nara, Japan - Frank Becker et al.

25 Dose Rate during Injection 28.0 s CMPWG Nara, Japan - Frank Becker et al.

26 Dose Rate during Handling under Laboratory Conditions CMPWG Nara, Japan - Frank Becker et al.

27 Video + Hand Simulation Ch. Blunck, PhD Thesis CMPWG Nara, Japan - Frank Becker et al.

28 Near Future: KIT and BOOSTER Gamma Camera BiO-dOSimetric Tools for triage to Responders Contribution to WP 300 Fast Evaluation Include sensors in existing tracing systems for dosimetry analysis - superimposition with visible images Laboratory tests will be carried out defining the performance of the gamma camera in running projects Comparison with Monte Carlo simulations and traditional dose distribution measurements Possibilities in nuclear medicine centres: Detecting traces of radioactive substances Detecting patients undergoing nuclear medicine therapy within a group of people Campus-Blog 2009 Nürnberger Zeitung CMPWG Nara, Japan - Frank Becker et al.

29 FIN F. Becker 1, Ch. Blunck 1, C. Figueira 2, F. Göpfert 1, B. Esteves 3, S. Di Maria 2, G. Paulo 4, J. Santos 4, P. Teles 2, P. Vaz 2, E. Martini 5 and J. Engelhardt 5 1 KIT 2 ITN, 3 Radiology Department of Hospital dos Covões 4 College of Health Technology of Coimbra 5 LPS Berlin CMPWG Nara, Japan - Frank Becker et al.