{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,6]],"date-time":"2026-02-06T06:17:33Z","timestamp":1770358653284,"version":"3.49.0"},"reference-count":47,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2023,10,10]],"date-time":"2023-10-10T00:00:00Z","timestamp":1696896000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001659","name":"Deutsche Forschungsgemeinschaft","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100001659","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["aapm.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J Applied Clin Med Phys"],"published-print":{"date-parts":[[2024,2]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:label\/><jats:p>Four\u2010dimensional computed tomography (4DCT), which relies on breathing\u2010induced motion, requires realistic surrogate information of breathing variations to reconstruct the tumor trajectory and motion variability of normal tissues accurately. Therefore, the SimRT surface\u2010guided respiratory monitoring system has been installed on a Siemens CT scanner. This work evaluated the temporal and spatial accuracy of SimRT versus our commonly used pressure sensor, AZ\u2010733\u00a0V.<\/jats:p><\/jats:sec><jats:sec><jats:label\/><jats:p>A dynamic thorax phantom was used to reproduce regular and irregular breathing patterns acquired by SimRT and Anzai. Various parameters of the recorded breathing patterns, including mean absolute deviations (MAD), Pearson correlations (PC), and tagging precision, were investigated and compared to ground\u2010truth. Furthermore, 4DCT reconstructions were analyzed to assess the volume discrepancy, shape deformation and tumor trajectory.<\/jats:p><\/jats:sec><jats:sec><jats:label\/><jats:p>Compared to the ground\u2010truth, SimRT more precisely reproduced the breathing patterns with a MAD range of 0.37\u00a0\u00b1\u00a00.27 and 0.92\u00a0\u00b1\u00a01.02\u00a0mm versus Anzai with 1.75\u00a0\u00b1\u00a01.54 and 5.85\u00a0\u00b1\u00a03.61\u00a0mm for regular and irregular breathing patterns, respectively. Additionally, SimRT provided a more robust PC of 0.994\u00a0\u00b1\u00a00.009 and 0.936\u00a0\u00b1\u00a00.062 for all investigated breathing patterns. Further, the peak and valley recognition were found to be more accurate and stable using SimRT. The comparison of tumor trajectories revealed discrepancies up to 7.2 and 2.3\u00a0mm for Anzai and SimRT, respectively. Moreover, volume discrepancies up to 1.71\u00a0\u00b1\u00a01.62% and 1.24\u00a0\u00b1\u00a02.02% were found for both Anzai and SimRT, respectively.<\/jats:p><\/jats:sec><jats:sec><jats:label\/><jats:p>SimRT was validated across various breathing patterns and showed a more precise and stable breathing tracking, (i) independent of the amplitude and period, (ii) and without placing any physical devices on the patient's body. These findings resulted in a more accurate temporal and spatial accuracy, thus leading to a more realistic 4DCT reconstruction and breathing\u2010adapted treatment planning.<\/jats:p><\/jats:sec>","DOI":"10.1002\/acm2.14174","type":"journal-article","created":{"date-parts":[[2023,10,12]],"date-time":"2023-10-12T03:44:54Z","timestamp":1697082294000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Comparative evaluation of a surface\u2010based respiratory monitoring system against a pressure sensor for 4DCT image reconstruction in phantoms"],"prefix":"10.1002","volume":"25","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6526-2453","authenticated-orcid":false,"given":"Abdallah","family":"Qubala","sequence":"first","affiliation":[{"name":"Heidelberg Ion Beam Therapy Center (HIT)  Heidelberg Germany"},{"name":"Faculty of Medicine University of Heidelberg  Heidelberg Germany"},{"name":"National Center for Radiation 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Heidelberg Germany"},{"name":"National Center for Radiation Research in Oncology (NCRO) Heidelberg Institute of Radiation Oncology (HIRO)  Heidelberg Germany"},{"name":"Department of Radiation Oncology Heidelberg University Hospital  Heidelberg Germany"},{"name":"National Center for Tumor Diseases (NCT)  Heidelberg Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marcus","family":"Winter","sequence":"additional","affiliation":[{"name":"Heidelberg Ion Beam Therapy Center (HIT)  Heidelberg Germany"},{"name":"National Center for Radiation Research in Oncology (NCRO) Heidelberg Institute of Radiation Oncology (HIRO)  Heidelberg Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Daniel","family":"Piro","sequence":"additional","affiliation":[{"name":"Heidelberg Ion Beam Therapy Center (HIT)  Heidelberg Germany"},{"name":"Saarland University of Applied Sciences  Saarbruecken Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Oliver","family":"J\u00e4kel","sequence":"additional","affiliation":[{"name":"Heidelberg Ion Beam Therapy Center (HIT)  Heidelberg Germany"},{"name":"National Center for Radiation Research in Oncology (NCRO) Heidelberg Institute of Radiation Oncology (HIRO)  Heidelberg Germany"},{"name":"National Center for Tumor Diseases (NCT)  Heidelberg Germany"},{"name":"Department of Medical Physics in Radiation Oncology German Cancer Research Center (DKFZ)  Heidelberg 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