Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Gregor Schaefers"'
Publikováno v:
Brain Stimulation, Vol 14, Iss 3, Pp 488-497 (2021)
Background: Transcranial electric stimulation during MR imaging can introduce safety issues due to coupling of the RF field with the stimulation electrodes and leads. Objective: To optimize the stimulation setup for MR current density imaging (MRCDI)
Externí odkaz:
https://doaj.org/article/a3bf9bf15417456a8c488a751c17fd0d
Objective This study presents an extended evaluation of a numerical approach to simulate artifacts of metallic implants in an MR environment. Methods The numerical approach is validated by comparing the artifact shape of the simulations and measureme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5f491d68db41bb75d4173fad4a84c465
https://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&origin=inward&scp=85150309954
https://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&origin=inward&scp=85150309954
Publikováno v:
Magnetic Resonance Materials in Physics, Biology and Medicine. 35:485-497
Objective This study presents the development and evaluation of a numerical approach to simulate artifacts of metallic implants in an MR environment that can be applied to improve the testing procedure for MR image artifacts in medical implants accor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bfd04361cb4582ee9b9f849f777c9f95
https://doi.org/10.1007/s10334-021-00966-5
https://doi.org/10.1007/s10334-021-00966-5
Autor:
Gregor Schaefers
Publikováno v:
Der Radiologe. 59:875-884
Im vorliegenden Beitrag sollen magnetresonanztomographische (MR) Wechselwirkungen und damit verbundene notwendige MR-Prufverfahren fur Implantate beleuchtet werden. Seit 2012 sind viele MR-Wechselwirkungen von Gegenstanden physikalisch beschrieben un
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::872dd3ace0fc2ffcdc8fadd37fb2ea69
https://doi.org/10.1007/s00117-019-00588-y
https://doi.org/10.1007/s00117-019-00588-y
Autor:
Harald H. Quick, Karsten H. Wrede, Yacine Noureddine, Gregor Schaefers, Mark E. Ladd, Bixia Chen, Andreas K. Bitz, Oliver Kraff
Publikováno v:
Magnetic Resonance in Medicine. 82:1859-1875
PURPOSE To evaluate radiofrequency (RF) induced tissue heating around aneurysm clips during a 7T head MR examination and to determine the decoupling distance between multiple implanted clips. METHODS A total of 120 RF exposure scenarios of clinical r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d783231e94a2c008d7d2f55c90c24bf2
https://doi.org/10.1002/mrm.27835
https://doi.org/10.1002/mrm.27835
Publikováno v:
Gregersen, F, Göksu, C, Schaefers, G, Xue, R, Thielscher, A & Hanson, L G 2021, ' Safety evaluation of a new setup for transcranial electric stimulation during magnetic resonance imaging ', Brain Stimulation, vol. 14, no. 3, pp. 488-497 . https://doi.org/10.1016/j.brs.2021.02.019
Brain Stimulation, Vol 14, Iss 3, Pp 488-497 (2021)
Brain Stimulation
Brain Stimulation, Vol 14, Iss 3, Pp 488-497 (2021)
Brain Stimulation
Background Transcranial electric stimulation during MR imaging can introduce safety issues due to coupling of the RF field with the stimulation electrodes and leads. Objective To optimize the stimulation setup for MR current density imaging (MRCDI) a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::99e02495f42fab0060b100a5c70f52d5
https://orbit.dtu.dk/en/publications/db1fde15-8b2c-4f34-8d3f-35396a369420
https://orbit.dtu.dk/en/publications/db1fde15-8b2c-4f34-8d3f-35396a369420
Autor:
Matthias Hipp, Sabine Hentschel, Ralf Ringler, Richard Lösch, Manuel Stich, Karina Schuller, Larissa Blümlein, Felix Schmidl, Anne Slawig, Gregor Schaefers
Publikováno v:
Current Directions in Biomedical Engineering, Vol 4, Iss 1, Pp 153-156 (2018)
Many patients in radiotherapy carry active implantable medical devices (AIMDs) such as pacemakers or cardioverter defibrillators (ICDs). The influence of the ionizing radiation can lead to failures in the device function. This study presents a tissue
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6c054c4960619c9f39815d66b6146581
https://doi.org/10.1515/cdbme-2018-0038
https://doi.org/10.1515/cdbme-2018-0038
Autor:
Karsten H. Wrede, Bixia Chen, Gregor Schaefers, Oliver Kraff, Mark E. Ladd, Andreas K. Bitz, Yacine Noureddine, Harald H. Quick
Publikováno v:
Magnetic Resonance in Medicine. 79:568-581
Purpose To examine radiofrequency-induced tissue heating around intracranial aneurysm clips during a 7 Tesla (T) head MR examination. Methods Radiofrequency (RF), temperature simulations, and RF measurements were employed to investigate the effects o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ff70c0ced25a1eaf8de3e628ce487b28
https://doi.org/10.1002/mrm.26650
https://doi.org/10.1002/mrm.26650
Autor:
Gregor, Schaefers
Publikováno v:
Der Radiologe. 59(10)
In the present article, interactions associated with magnetic resonance (MR) procedures and MR test procedures for implants/devices are examined.Since 2012, many interactions of items with MR procedures have been physically described and translated i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::d504cd7015dd8fa959d418b9bab3697a
https://pubmed.ncbi.nlm.nih.gov/31591698
https://pubmed.ncbi.nlm.nih.gov/31591698
Publikováno v:
IFMBE Proceedings ISBN: 9789811090226
Radiotherapy (RT) treatment planning is based on computed tomography (CT) images and traditionally uses the conventional Hounsfield unit (CHU) range. This HU range is suited for human tissue but inappropriate for metallic materials. To guarantee safe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8c161a22d109f700cc29c3e46d6a0314
https://doi.org/10.1007/978-981-10-9023-3_111
https://doi.org/10.1007/978-981-10-9023-3_111