The design and testing of a solid phantom for the verification of a commercial 3D seed reconstruction algorithm.
OBJECTIVE
To test the implementation of a new solid phantom and to study the accuracy and the reliability of 3D seed reconstruction algorithms in prostate seed implants.


METHODS
A solid phantom, the Kiel-phantom, to simulate prostate implants was designed. Several measurements were performed with this phantom to test the three-film seed reconstruction using a commercial planning system.


RESULTS
Precision of better than 0.1 mm (SD) were found for seed combinations when source projections do not overlap. If seeds overlapped from two or more gantry angles, the software showed serious miscomputations with seed displacements of more than 30.0mm.


CONCLUSIONS
Systematic measurements were carried out which demonstrated that the solid phantom can be an advantageous tool to increase the quality assessment for seed planning systems.
Siebert
Frank-André
FA
Interdisciplinary Brachytherapy Center, University Hospital of Schleswig-Holstein, Campus Kiel, Arnold-Heller-Str.9 24105 Kiel, Germany.
Kohr
Peter
P
Kovács
György
G
D000465:Algorithms; D001918:Brachytherapy / Q000295:instrumentation* / Q000592:standards; D004867:Equipment Design; D006801:Humans; D021621:Imaging, Three-Dimensional; D008297:Male; D011471:Prostatic Neoplasms / Q000532:radiotherapy*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity