Surface Applicator Dosimetric Measurements Xoft Dosimetry As a

Surface Applicator Dosimetric Measurements

Xoft Dosimetry § As a leader in dosimetric studies, Xoft routinely creates custom fixturing to characterize performance of the Axxent source and applicators § For the surface applicator the effort involves both film and ion chamber based apparatus Copyright © 2005 Xoft, Inc. Confidential - Internal Use Only

Film Water Phantom § Beam profiles at various depths via end-on films Copyright © 2005 Xoft, Inc. Confidential - Internal Use Only

Film Water Phantom § Or all at once with an edge-on film Copyright © 2005 Xoft, Inc. Confidential - Internal Use Only

Film Profiles of 30 mm Applicator § Profiles at 0, 5 and 10 mm from applicator surface Copyright © 2005 Xoft, Inc. Confidential - Internal Use Only

Film Profiles of 30 mm Applicator § Profile at applicator surface Copyright © 2005 Xoft, Inc. Confidential - Internal Use Only

Film Profiles of 30 mm Applicator § Profile at 5 mm from applicator surface Copyright © 2005 Xoft, Inc. Confidential - Internal Use Only

Film Profiles of 30 mm Applicator § Profile at 10 mm from applicator surface Copyright © 2005 Xoft, Inc. Confidential - Internal Use Only

Effect of a Flattening Filter § With the Xoft 50 k. Vp spectrum, it is easy to turn this. . . Unfiltered intensity profiles At applicator surface Copyright © 2005 Xoft, Inc. Confidential - Internal Use Only 5 mm deep

Effect of Flattening Filter § Into this… – or even into a custom pattern Filtered intensity profiles At applicator surface Copyright © 2005 Xoft, Inc. Confidential - Internal Use Only 5 mm deep

Data Extraction from Edge-on Films § Start with a calibrated film image… Copyright © 2005 Xoft, Inc. Confidential - Internal Use Only

Data Extraction from Edge-on Films § Select points to extract dose values from… Copyright © 2005 Xoft, Inc. Confidential - Internal Use Only

Data Extraction from Edge-on Films § And get a series of profile plots at different depths Copyright © 2005 Xoft, Inc. Confidential - Internal Use Only

Data Extraction from Edge-on Films § Or change the pattern… Copyright © 2005 Xoft, Inc. Confidential - Internal Use Only

Data Extraction from Edge-on Films § And get a series of depth dose plots at different positions Copyright © 2005 Xoft, Inc. Confidential - Internal Use Only

Ion Chamber Based Apparatus § Miniature ion chamber rotates around surface applicator Copyright © 2005 Xoft, Inc. Confidential - Internal Use Only

Ion Chamber Provides Absolute Dose Data § Good check on film calibration Copyright © 2005 Xoft, Inc. Confidential - Internal Use Only

Xoft Surface Applicator § Xoft is committed to extensive dosimetric characterization of all existing and future applications of the Axxent source Copyright © 2005 Xoft, Inc. Confidential - Internal Use Only