Anja Betgen
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Explore the profile of Anja Betgen including associated specialties, affiliations and a list of published articles.
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Articles
31
Citations
394
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Recent Articles
1.
Ferreira Silverio N, van den Wollenberg W, Betgen A, Wiersema L, Marijnen C, Peters F, et al.
Radiother Oncol
. 2024 Dec;
203():110667.
PMID: 39675574
Background & Purpose: Deep learning (DL) based auto-segmentation has shown to be beneficial for online adaptive radiotherapy (OART). However, auto-segmentation of clinical target volumes (CTV) is complex, as clinical interpretations...
2.
Dassen M, Neijndorff B, Betgen A, Wiersema L, de Ruiter P, van der Linden J, et al.
Pract Radiat Oncol
. 2024 Nov;
PMID: 39510409
Purpose: To evaluate the feasibility and accuracy of focal boosting in online adaptive MRI-guided stereotactic body radiation therapy (SBRT) for patients with prostate cancer (PCa) with seminal vesicle invasion (T3b)...
3.
Kensen C, Simoes R, Betgen A, Wiersema L, Lambregts D, Peters F, et al.
Phys Imaging Radiat Oncol
. 2024 Sep;
32:100648.
PMID: 39319094
Background And Purpose: In online adaptive magnetic resonance image (MRI)-guided radiotherapy (MRIgRT), manual contouring of rectal tumors on daily images is labor-intensive and time-consuming. Automation of this task is complex...
4.
Ferreira Silverio N, van den Wollenberg W, Betgen A, Wiersema L, Marijnen C, Peters F, et al.
Adv Radiat Oncol
. 2024 May;
9(6):101483.
PMID: 38706833
Purpose: Segmentation of clinical target volumes (CTV) on medical images can be time-consuming and is prone to interobserver variation (IOV). This is a problem for online adaptive radiation therapy, where...
5.
Kensen C, Betgen A, Wiersema L, Peters F, Kayembe M, Marijnen C, et al.
Cancers (Basel)
. 2023 Feb;
15(4).
PMID: 36831354
The purpose of this study was to characterize the motion and define the required treatment margins of the pathological mesorectal lymph nodes (GTV) for two online adaptive MRI-guided strategies for...
6.
Jagt T, Janssen T, Betgen A, Wiersema L, Verhage R, Garritsen S, et al.
Phys Imaging Radiat Oncol
. 2022 Sep;
24:7-13.
PMID: 36092772
Background/purpose: In daily plan adaptation the radiotherapy treatment plan is adjusted just prior to delivery. A simple approach is taking the planning objectives of the reference plan and directly applying...
7.
Kensen C, Janssen T, Betgen A, Wiersema L, Peters F, Remeijer P, et al.
Radiat Oncol
. 2022 Jun;
17(1):110.
PMID: 35729587
Purpose: To determine PTV margins for intrafraction motion in MRI-guided online adaptive radiotherapy for rectal cancer and the potential benefit of performing a 2nd adaptation prior to irradiation. Methods: Thirty...
8.
van de Lindt T, Fast M, van den Wollenberg W, Kaas J, Betgen A, Nowee M, et al.
Phys Med Biol
. 2021 Apr;
66(10).
PMID: 33887708
. Accurate tumor localization for image-guided liver stereotactic body radiation therapy (SBRT) is challenging due to respiratory motion and poor tumor visibility on conventional x-ray based images. Novel integrated MRI...
9.
van Beek S, Betgen A, Buijs M, Stam J, Hartgring L, van Triest B, et al.
Phys Imaging Radiat Oncol
. 2021 Jan;
6:89-93.
PMID: 33458395
Background And Purpose: The clinical target volume (CTV) in radiotherapy of rectal cancer is subject to large deformations. With a plan library strategy, the treatment may be adapted to these...
10.
Alderliesten T, Heemsbergen W, Betgen A, Topolnjak R, Elkhuizen P, van Vliet-Vroegindeweij C, et al.
Phys Imaging Radiat Oncol
. 2021 Jan;
6:71-76.
PMID: 33458392
Background & Purpose: With the introduction of more conformal techniques for breast cancer radiation therapy (RT), motion management is becoming increasingly important. We studied the breast-shape variability during RT after...