지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
오류제보하기
MR compatible coaxial-slot antenna for microwave hyperthermia was developed while its structure and size of each part were determined by computer simulation using finite element method(FEM). Its local heating performance was evaluated using tissue-mimic phantom and swine muscles. 2% agarose gel mixed with 6mM/ℓ MnCl2 as a biological tissue-mimic phantom was heated by the proposed antenna driven by a 2.45GHz microwave generator. The temperature changes of the phantom were monitored using multi-channel digital thermometer at the distance of 0mm, 5mm, 10mm and 20mm from the tip center of the antenna. Also muscle tissue of swine was heated for 2 and 5minutes with 50W and 30W of microwave generator powers, respectively, to evaluate the local heating performance of the antenna. MRI compatibility was also verified by acquiring MR images and MR temperature map. MR signals were acquired from the agarose gel phantom using T2* GRE sequence with 1.5T clinical MRI scanner(Signa Echospeed, GE, Milwaukee, WI, U.S.A.) at Pusan Paik Hospital and were transferred to PC in order to reconstruct MR images and temperature map using proton resonance frequency(PRF) method and laboratory-developed phase unwrapping algorithm. Authors found that it has no severe distortion due to the antenna inserted into the phantom. Finally, we can conclude that the suggested coaxial-slot antenna has an excellent local heating performance for both of tissue-mimic phantom and swine muscle, and it is compatible to 1.5T MRI scanner
목차
등록된 정보가 없습니다.
참고문헌 (19)
참고문헌 신청
B.D. Senneville / 2007 / MR thermometry for monitoring tumor ablation / Eur Radiol 17 : 2401 ~ 2410
C. Gabriel / 1996 / Compilation of the dielectric properties of body tissues at RF and microwave frequencies
C. Mougenot / 2004 / Automatic spatial and temporal temperature control for MR-guided focused ultrasound using fast 3D MR thermometry and multispiral tragectory of the focal
C.M.C. Tempany / 2003 / MR imaging-guided focused ultrasound surgery of uterine leiomyomas: A feasibility study / Radiology 226 (3) : 897 ~ 905
D. Germain / 2001 / MR monitoring of laser-induced lesion of the liver in vivo in a low-field open magnet: Temperature mapping and lesion size prediction / J. of MRM 13 : 42
C. Gabriel / 1996 / Compilation of the dielectric properties of body tissues at RF and microwave frequencies
C. Mougenot / 2004 / Automatic spatial and temporal temperature control for MR-guided focused ultrasound using fast 3D MR thermometry and multispiral tragectory of the focal
C.M.C. Tempany / 2003 / MR imaging-guided focused ultrasound surgery of uterine leiomyomas: A feasibility study / Radiology 226 (3) : 897 ~ 905
D. Germain / 2001 / MR monitoring of laser-induced lesion of the liver in vivo in a low-field open magnet: Temperature mapping and lesion size prediction / J. of MRM 13 : 42
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