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@ARTICLE{Mann:154398,
author = {P. Mann$^*$ and M. Witte$^*$ and P. Mercea$^*$ and S. Nill
and C. Lang$^*$ and C. Karger$^*$},
title = {{F}easibility of markerless fluoroscopic real-time tumor
detection for adaptive radiotherapy: development and
end-to-end testing.},
journal = {Physics in medicine and biology},
volume = {65},
number = {11},
issn = {1361-6560},
address = {Bristol},
publisher = {IOP Publ.},
reportid = {DKFZ-2020-00738},
pages = {115002},
year = {2020},
note = {2020 Jun 5;65(11):115002#EA:E040#LA:E040#},
abstract = {Respiratory-gated radiotherapy treatments of lung tumors
reduce the irradiated normal tissue volume and potentially
lower the risk of side effects. However, in clinical
routine, the gating signal is usually derived from external
markers or other surrogate signals and may not always
correlate well with the actual tumor position. This study
uses the kV-imaging system of a LINAC in combination with a
multiple template matching algorithm for markerless
real-time detection of the tumor position in a dynamic
anthropomorphic lung phantom. The tumor was realized by a
small container filled with polymer dosimetry gel, the
so-called gel tumor. A full end-to-end test for a gated
treatment was performed and the geometric and dosimetric
accuracy was validated. The accuracy of the tumor detection
algorithm in SI- direction was found to be (2.3±1.6) mm and
the gel tumor was automatically detected in 98 out of 100
images. The measured 3D dose distribution showed a uniform
coverage of the gel tumor and comparison with the treatment
plan revealed a high 3D γ-passing rate of 86.7 $\%$
$(3\%/3mm).$ The simulated treatment confirmed the employed
margin sizes for residual motion within the gating window
and serves as an end-to-end test for a gated treatment based
on a markerless fluoroscopic real-time tumor detection.},
cin = {E040},
ddc = {530},
cid = {I:(DE-He78)E040-20160331},
pnm = {315 - Imaging and radiooncology (POF3-315)},
pid = {G:(DE-HGF)POF3-315},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:32235075},
doi = {10.1088/1361-6560/ab8578},
url = {https://inrepo02.dkfz.de/record/154398},
}