Cited by 18Advanced Radiotherapy TechniquesBrain Metastases and TreatmentMedical Image Segmentation Techniques

Relocatable fixation systems in intracranial stereotactic radiotherapy: Accuracy of serial CT scans and patient acceptance in a randomized design

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Theelen, A., Martens, J., Bosmans, G., Houben, R., Jager, J.J., Rutten, I., Lambin, P., Minken, A.W. +1 more·2012·Strahlentherapie und Onkologie

Abstract

Purpose The goal was to provide a quantitative evaluation of the accuracy of three different fixation systems for stereotactic radiotherapy and to evaluate patients' acceptance for all fixations.Methods A total of 16 consecutive patients with brain tumours undergoing fractionated stereotactic radiotherapy (SCRT) were enrolled after informed consent (Clinical trials.gov: NCT00181350). Fixation systems evaluated were the BrainLAB® mask, with and without custom made bite-block (fixations S and A) and a homemade neck support with bite-block (fixation B) based on the BrainLAB® frame. The sequence of measurements was evaluated in a randomized manner with a cross-over design and patients' acceptance by a questionnaire.Results The mean three-dimensional (3D) displacement and standard deviations were 1.16 ± 0.68 mm for fixation S, 1.92 ± 1.28 and 1.70 ± 0.83 mm for fixations A and B, respectively. There was a significant improvement of the overall alignment (3D vector) when using the standard fixation instead of fixation A or B in the craniocaudal direction (p = 0.037). Rotational deviations were significantly less for the standard fixation S in relation to fixations A (p = 0.005) and B (p = 0.03). EPI imaging with off-line correction further improved reproducibility. Five out of 8 patients preferred the neck support with the bite-block.Conclusion The mask fixation system in conjunction with a bite-block is the most accurate fixation for SCRT reducing craniocaudal and rotational movements. Patients favoured the more comfortable but less accurate neck support. To optimize the accuracy of SCRT, additional regular portal imaging is warranted.

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Crossref · 10.1007/s00066-011-0018-7

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Authors
Theelen, A., Martens, J., Bosmans, G., Houben, R., Jager, J. J., Rutten, I., Lambin, P., Minken, A. W., & Baumert, B. G.
Affiliations
Maastricht University Medical Centre (NL)
Corresponding author
Baumert, B.G.
Venue
Strahlentherapie und Onkologie
Published
2011-12-24
Volume
188
Issue
1
Pages
84-90
ISSN
  • 0179-7158 (ISSN-L)
  • 1439-099X
OpenAlex
W1219131453
Cited by
18
References
31
Citations by year
2025: 1 · 2022: 1 · 2020: 1 · 2018: 1 · 2017: 1 · 2016: 1 · 2015: 3 · 2014: 2 · 2013: 3 · 2012: 4
FWCI
3.13
Type
journal article
Language
en
Locations
  • Strahlentherapie und Onkologie (publishedVersion)
  • PubMed (publishedVersion)
  • Research Publications (Maastricht University) (publishedVersion, other-oa)
  • Research Publications (Maastricht University) (submittedVersion, other-oa)
Topics
  • Physical Sciences › Physics and Astronomy › Radiation › Advanced Radiotherapy Techniques
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Brain Metastases and Treatment
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Medical Image Segmentation Techniques
Keywords
stereotactic radiotherapy, patient immobilization, bite block, neck support, brain tumors, patient acceptance, patient positioning accuracy, portal imaging
MeSH terms
Adenoma, Astrocytoma, Brain Neoplasms, Humans, Image Processing, Computer-Assisted, Meningeal Neoplasms, Meningioma, Netherlands, Neuroma, Acoustic, Patient Acceptance of Health Care, Pituitary Neoplasms, Prospective Studies, Surveys and Questionnaires, Radiotherapy Planning, Computer-Assisted, Tomography, X-Ray Computed, Artifacts, Radiosurgery, Imaging, Three-Dimensional, Patient Positioning

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