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@ARTICLE{Fuchs:307385,
author = {F. Fuchs and R. Herrera and R. Kotecha and M. Rubens and M.
Roy and K. E. Mittauer and S. Mansoorian and A. Kaiser and
N. Kalman and A. Gaasch and S. N. Marschner and N. Bassiri
and P. Rogowski and C. Eze and C. Belka$^*$ and S. Corradini
and M. D. Chuong},
title = {{M}ulti-{I}nstitutional {A}nalysis of {MR}-{G}uided
{S}ingle-{F}raction {S}tereotactic {A}blative {B}ody
{R}adiation {T}herapy: {F}easibility, {S}afety, and
{E}fficacy.},
journal = {International journal of radiation oncology, biology,
physics},
volume = {nn},
issn = {0360-3016},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {DKFZ-2025-03029},
pages = {nn},
year = {2025},
note = {epub / Autoren checken},
abstract = {Stereotactic ablative body radiation therapy (SABR) is
commonly delivered in multiple fractions, whereas
single-fraction (SF) SABR remains uncommon. Magnetic
resonance (MR) guided linacs provide superior soft-tissue
contrast compared to cone-beam computed tomography on
conventional linacs, online adaptive replanning, continuous
intrafraction visualization, and automatically triggered
beam delivery, potentially enabling safe and effective
SF-SABR.We retrospectively analyzed patients treated with
MR-guided SF-SABR on a 0.35 Tesla MR-linac at two centers in
XXX and XXX (anonymized for review). Median SF-SABR doses
were 28 Gy (range: 28-40 Gy) for liver lesions, 30 Gy
(range: 28-34 Gy) for lung lesions, 25 Gy for adrenal gland
lesions and lymph nodes, and 26 Gy (range: 25-26 Gy) for
renal lesions. Endpoints included local control (LC),
progression-free survival (PFS), overall survival (OS), and
toxicity graded according to CTCAE v5.0.Between April 2020
and December 2024, 161 patients with 175 lesions underwent
MR-guided SF-SABR. Lesion distribution was liver $(48.0\%),$
lung $(42.9\%),$ adrenal gland $(4.3\%),$ lymph nodes
$(3.4\%),$ and kidney $(1.9\%).$ Median gross tumor volume
(GTV) and planning target volume were 2.4 cc (range:
0.2-83.3 cc) and 9.3 cc (range: 1.4-112.1 cc), respectively.
At a median follow-up of 19.3 months, LC rates at 1 and 2
years were $99.1\%$ and $93.6\%,$ respectively. PFS rates at
1 and 2 years were $59.3\%$ and $51.4\%,$ while OS rates
were $81.8\%$ and $73.4\%,$ respectively. Treatment was well
tolerated, with only one acute grade 3 toxicity reported and
no acute grade 4-5 or late grade 3-5 toxicities. Colorectal
primary tumors were associated with poorer LC (HR 0.226;
p=0.023). Larger GTV independently correlated with reduced
LC (HR 1.15; p=0.048) and OS (HR 1.05; p=0.001).MR-guided
SF-SABR is feasible, safe, and effective across various
tumor locations, providing favorable LC with minimal
toxicity, warranting further prospective evaluation.},
cin = {MU01},
ddc = {610},
cid = {I:(DE-He78)MU01-20160331},
pnm = {899 - ohne Topic (POF4-899)},
pid = {G:(DE-HGF)POF4-899},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:41422918},
doi = {10.1016/j.ijrobp.2025.12.018},
url = {https://inrepo02.dkfz.de/record/307385},
}