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SU‐E‐T‐260: Development of a System to Verify for Connection Consistency in a Brachytherapy
Author(s) -
Otani Y,
Sumida I,
Yagi M,
Mizuno H,
Takashina M,
Koizumi M,
Ogawa K
Publication year - 2015
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.4924622
Subject(s) - magnet , brachytherapy , computer science , core (optical fiber) , electrical engineering , physics , telecommunications , engineering , medicine , radiation therapy
Purpose: Brachytherapy has multiple manual procedures which are prone to human error, especially during the connection process of the treatment device to applicator. This is when considerable attention is required. In this study, we propose a new connection verification device concept. Methods: The system is composed of a ring magnet (anisotropic ferrite : magfine Inc), hole device (A1324LUA‐T : Allegro MicroSystems Phil Inc) and an in‐house check cable, which is made from magnetic material (Figure1). The magnetic field distribution is affected by the check cable position and any magnetic field variation is detected by the hole device. This system frequency is 20Hz and the average of 4 signals was used as hole device value to reduce noise. Results: The value of the hole device is altered, depending on the location of the check cable. The resolution of the check cable position is 5mm and 10mm, around a 10mm region from the hole device and over 10mm, respectively. There was a reduction in sensitivity of the hole device, in our test, which was linked to the distance of the hole device from the check cable. Conclusion: We demonstrated a new concept of connection verification in a brachytherapy. This system has the possibility to detect an incorrect connection. Moreover, the system is capable of self‐optimization, such as determining the number of hole device and the magnet strength.Acknowledgement:This work was supported by JSPS Core ‐to‐Core program Number 23003 and KAKENHI Grant Number 26860401. This work was supported by JSPS Core‐to‐Core program Number 23003 and KAKENHI Grant Number 26860401.