caa a22 4500 606183930 CHVBK 20210128100823.0 cr unu---uuuuu 210128e20150701xx s 000 0 eng 10.1007/s00405-014-2949-y doi (NATIONALLICENCE)springer-10.1007/s00405-014-2949-y Effects and consequences of Digisonic SP cochlear implant on radiotherapy planning [Elektronische Daten] [Nicolas Guevara, Ibrahim Atean, David Benoit, Yoann Pointreau, Gaëlle Angellier, Serge Marcie, Sonia Saaï, Dan Gnansia, Juliette Thariat] The aim of this study was to assess dose attenuation by a Digisonic SP cochlear implant (CI) and evaluate its impact on treatment planning. The Digisonic CI was irradiated with 6MV photons. Overall dose attenuation was assessed with MOSFET dosimeters and Gafchromic films. In addition, we evaluated the attenuation of separate CI components. Dose attenuation was also calculated using different radiation treatment planning systems (TPS) softwares and dose calculation algorithms. The CI was placed on a head phantom. Single-beam and multiple-beam plans were evaluated for dose attenuation using two radiation techniques (Conformal and Stereotactic radiotherapy) and four different algorithms (Clarkson, Point Kernel-Superposition, Ray Tracing and Monte Carlo). MOSFET and Gafchromics film showed maximal 6-7.5 % radiation dose attenuation, at the center of the CI. Computerized TPS-based dose attenuation by the implant was 4-8.1%, using a single ipsilateral field. No clinically meaningful dose attenuation was found in multiple field plans owing to the contribution of various beam paths with only a couple going through the implant using either conventional conformal or stereotactic treatment plans. Dose attenuation induced by a Digisonic SP CI is about 6%, for single 6MV photon field. This dose reduction is unlikely to be clinically significant, as single-field radiotherapy plans to this anatomic region are uncommon. Springer-Verlag Berlin Heidelberg, 2014 Cochlear implant nationallicence Radiotherapy planning nationallicence Dosimetry nationallicence Guevara Nicolas Department of Head and Neck Surgery, University Center—Institut Universitaire de la Face et du Cou, 33 Av. Valombrose, 06189, Nice Cedex 2, France aut Atean Ibrahim Department of Radiation Oncology, King Fahad Specialist Hospital, Dammam, Saudi Arabia aut Benoit David Medical Physic Unit, Department of Radiation Oncology, Henry Kaplan Oncology Centre, CHRU, Tours, France aut Pointreau Yoann Medical Physic Unit, Department of Radiation Oncology, Henry Kaplan Oncology Centre, CHRU, Tours, France aut Angellier Gaëlle Department of Radiation Oncology, Cancer Center Antoine-Lacassagne, University Nice Sophia-Antipolis, 33 Av. Valombrose, 06189, Nice Cedex 02, France aut Marcie Serge Department of Radiation Oncology, Cancer Center Antoine-Lacassagne, University Nice Sophia-Antipolis, 33 Av. Valombrose, 06189, Nice Cedex 02, France aut Saaï Sonia Neurelec, 2720 Chemin Saint Bernard, 06220, Vallauris, France aut Gnansia Dan Neurelec, 2720 Chemin Saint Bernard, 06220, Vallauris, France aut Thariat Juliette Department of Radiation Oncology, Cancer Center Antoine-Lacassagne, University Nice Sophia-Antipolis, 33 Av. Valombrose, 06189, Nice Cedex 02, France aut European Archives of Oto-Rhino-Laryngology Springer Berlin Heidelberg 272/7(2015-07-01), 1597-1603 0937-4477 272:7<1597 2015 272 405 https://doi.org/10.1007/s00405-014-2949-y text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00405-014-2949-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Guevara Nicolas Department of Head and Neck Surgery, University Center—Institut Universitaire de la Face et du Cou, 33 Av. Valombrose, 06189, Nice Cedex 2, France aut NATIONALLICENCE 700 1- Atean Ibrahim Department of Radiation Oncology, King Fahad Specialist Hospital, Dammam, Saudi Arabia aut NATIONALLICENCE 700 1- Benoit David Medical Physic Unit, Department of Radiation Oncology, Henry Kaplan Oncology Centre, CHRU, Tours, France aut NATIONALLICENCE 700 1- Pointreau Yoann Medical Physic Unit, Department of Radiation Oncology, Henry Kaplan Oncology Centre, CHRU, Tours, France aut NATIONALLICENCE 700 1- Angellier Gaëlle Department of Radiation Oncology, Cancer Center Antoine-Lacassagne, University Nice Sophia-Antipolis, 33 Av. Valombrose, 06189, Nice Cedex 02, France aut NATIONALLICENCE 700 1- Marcie Serge Department of Radiation Oncology, Cancer Center Antoine-Lacassagne, University Nice Sophia-Antipolis, 33 Av. Valombrose, 06189, Nice Cedex 02, France aut NATIONALLICENCE 700 1- Saaï Sonia Neurelec, 2720 Chemin Saint Bernard, 06220, Vallauris, France aut NATIONALLICENCE 700 1- Gnansia Dan Neurelec, 2720 Chemin Saint Bernard, 06220, Vallauris, France aut NATIONALLICENCE 700 1- Thariat Juliette Department of Radiation Oncology, Cancer Center Antoine-Lacassagne, University Nice Sophia-Antipolis, 33 Av. Valombrose, 06189, Nice Cedex 02, France aut NATIONALLICENCE 773 0- European Archives of Oto-Rhino-Laryngology Springer Berlin Heidelberg 272/7(2015-07-01), 1597-1603 0937-4477 272:7<1597 2015 272 405