PMID- 28870923
DCOM- 20171025
LR  - 20171025
IS  - 1791-7530 (Electronic)
IS  - 0250-7005 (Linking)
VI  - 37
IP  - 9
DP  - 2017 Sep
TI  - Magnetic Resonance Compatibility of a Transponder Aimed for Radiotherapy
      Positioning - A Phantom Study.
PG  - 4993-4996
AB  - BACKGROUND/AIM: Electromagnetic Positioning Systems (EMP) is a new position-ing
      technique in four-dimensional radiotherapy. Patients with implanted transponders 
      may be referred for magnetic resonance imaging (MRI) making it important to
      establish the MR safety. MATERIALS AND METHODS: Oranges were prepared with
      transponders and imaged on a 3T MR scanner with different sequences. Computed
      tomography (CT) was performed as comparison. MR artifacts were assessed. An
      estimation of the maximum transponder de-flection force and heating was made.
      RESULTS: The mean measured displacement of transponders was 0.1 mm
      (range=0.03-0.3 mm). Artifacts were observed adjacent to transponders using all
      sequences. The deflection force on the transponder in the gantry was less than 38
      mN. No heating was observed. CONCLUSION: The absence of any substantial movement,
      the weak measured deflection force and absence of observed heating speaks for the
      safe use of MR imaging with transponder 3T. Local artefacts makes evaluation
      impossible adjacent to transponders.
CI  - Copyright(c) 2017, International Institute of Anticancer Research (Dr. George J. 
      Delinasios), All rights reserved.
FAU - Wikstrom, Johan
AU  - Wikstrom J
AD  - Department of Surgical Sciences, Section of Radiology, Uppsala University,
      Uppsala, Sweden.
FAU - Isacsson, Ulf
AU  - Isacsson U
AD  - Department of Immunology, Genetics and Pathology, Section of Medical Radiation
      Sci-ence, Uppsala University, Uppsala, Sweden.
FAU - Johansson, Bengt
AU  - Johansson B
AD  - Department of Oncology, Orebro University Hospital, Orebro, Sweden.
FAU - Lennernas, B O
AU  - Lennernas BO
AD  - Department of Oncology, Orebro University Hospital, Orebro, Sweden
LA  - eng
PT  - Journal Article
PL  - Greece
TA  - Anticancer Res
JT  - Anticancer research
JID - 8102988
SB  - IM
MH  - *Citrus sinensis
MH  - Electromagnetic Phenomena
MH  - Humans
MH  - Magnetic Resonance Imaging/*methods
MH  - Male
MH  - Movement
MH  - *Phantoms, Imaging
MH  - Prostatic Neoplasms/*radiotherapy
MH  - Radiotherapy Planning, Computer-Assisted/*methods
MH  - Therapy, Computer-Assisted/*instrumentation
MH  - Tomography, X-Ray Computed/methods
OT  - *Prostate cancer
OT  - *electromagnetic positioning
OT  - *four dimensional radiotherapy
EDAT- 2017/09/06 06:00
MHDA- 2017/10/27 06:00
CRDT- 2017/09/06 06:00
PHST- 2017/04/06 00:00 [received]
PHST- 2017/06/16 00:00 [revised]
PHST- 2017/07/12 00:00 [accepted]
PHST- 2017/09/06 06:00 [entrez]
PHST- 2017/09/06 06:00 [pubmed]
PHST- 2017/10/27 06:00 [medline]
AID - 37/9/4993 [pii]
AID - 10.21873/anticanres.11911 [doi]
PST - ppublish
SO  - Anticancer Res. 2017 Sep;37(9):4993-4996. doi: 10.21873/anticanres.11911.