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First published online December 6, 2006
British Journal of Radiology (2007) 80, 446-451
© 2007 British Institute of Radiology
doi: 10.1259/bjr/94582813
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Dosimetric evaluation of a new collimator insert system for stereotactic radiotherapy

T Paschalis, PhD 1 P Sandilos, PhD 1,2 E Tatsis, MSc 1 P Karaiskos, PhD 2,3 C Antypas, MSc 1 C Chatzigiannis, MSc 1 K Dardoufas, PhD 1 E Georgiou, PhD 3 and L Vlachos, PhD 1

1 Department of Radiology, Medical School, University of Athens, Aretaieion Hospital, 76 Vas. Sofias Ave, 115 28 Athens, 2 Medical Physics Department, Hygeia Hospital, Kifissias Ave and Erythrou Stavrou, Marousi, 151 23 Athens, 3 Medical Physics Department, Medical School, University of Athens, 75 Mikras Asias, 115 27 Athens, Greece


Figure 1
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  		Figure 1. Stereotactic collimator insert.

 

Figure 2
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  		Figure 2. Planned isodose curves for collimator#3 in the humanoid phantom.

 

Figure 3
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  		Figure 3. Stereotactic treatment verification with film dosimetry.

 

Figure 4
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  		Figure 4. Collimator concentricity test(G = 0°).

 

Figure 5
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  		Figure 5. (a) Beam profile for d = 1.5 cm for collimator #1, (b) beam profile for d = 1.5 cm for collimator #3.

 

Figure 6
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  		Figure 6. PDD for collimator#2 at SSD = 100 cm.

 

Figure 7
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  		Figure 7. (a) Film verification of the planned isodose curves for collimator #1, (b) film verification of the planned isodose curves for collimator #3.

 




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