The Experts below are selected from a list of 167433 Experts worldwide ranked by ideXlab platform
Takeshi Maruo - One of the best experts on this subject based on the ideXlab platform.
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magnetic resonance guided focused ultrasound surgery for uterine fibroids relationship between the therapeutic effects and Signal Intensity of preexisting t2 weighted magnetic resonance images
American Journal of Obstetrics and Gynecology, 2007Co-Authors: Kaoru Funaki, Hidenobu Fukunishi, Tsuyoshi Funaki, Katsuhiro Sawada, Yasushi Kaji, Takeshi MaruoAbstract:Objective This study was undertaken to clarify the relationship between the Signal Intensity of T2-weighted magnetic resonance images and the therapeutic effect of magnetic resonance-guided focused ultrasound surgery (MRgFUS) on uterine fibroids. Study design Ninety-five fibroids in 63 patients were classified into 3 types based on the Signal Intensity of T2-weighted magnetic resonance images as follows: type 1, low Intensity; type 2, intermediate Intensity; type 3, high Intensity. The treated area ratio of MRgFUS and the volume reduction ratio 6 months after treatment were used as the indices of therapeutic effect. Results The treated area ratio of type 3 fibroids was the lowest among the 3 types ( P r = 0.64; P Conclusion The efficacy of MRgFUS correlates with the Signal Intensity of T2-weighted magnetic resonance images. Type 1 and type 2 fibroids are suitable candidates for MRgFUS, whereas type 3 fibroids are not.
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magnetic resonance guided focused ultrasound surgery for uterine fibroids relationship between the therapeutic effects and Signal Intensity of preexisting t2 weighted magnetic resonance images
American Journal of Obstetrics and Gynecology, 2007Co-Authors: Kaoru Funaki, Hidenobu Fukunishi, Tsuyoshi Funaki, Katsuhiro Sawada, Yasushi Kaji, Takeshi MaruoAbstract:OBJECTIVE: This study was undertaken to clarify the relationship between the Signal Intensity of T2-weighted magnetic resonance images and the therapeutic effect of magnetic resonance-guided focused ultrasound surgery (MRgFUS) on uterine fibroids. STUDY DESIGN: Ninety-five fibroids in 63 patients were classified into 3 types based on the Signal Intensity of T2-weighted magnetic resonance images as follows: type 1, low Intensity; type 2, intermediate Intensity; type 3, high Intensity. The treated area ratio of MRgFUS and the volume reduction ratio 6 months after treatment were used as the indices of therapeutic effect. RESULTS: The treated area ratio of type 3 fibroids was the lowest among the 3 types (P < .01). The volume reduction ratio correlated with the treated area ratio (r = 0.64; P < .01). CONCLUSION: The efficacy of MRgFUS correlates with the Signal Intensity of T2-weighted magnetic resonance images. Type 1 and type 2 fibroids are suitable candidates for MRgFUS, whereas type 3 fibroids are not.
Yasuyuki Yamashita - One of the best experts on this subject based on the ideXlab platform.
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Signal Intensity of the normal pontine tegmentum on T2-weighted MR imaging
Neuroradiology, 2006Co-Authors: Chiaki Asao, Masanori Imuta, Masamichi Hamaguchi, Katsuro Sagara, Yukunori Korogi, Toshinori Hirai, T. Okuda, Yoshitaka Goto, Yasuyuki YamashitaAbstract:On T2-weighted MR images, the pontine tegmentum frequently shows a Signal of high Intensity in neurologically healthy individuals. We examined whether the Signal Intensity of the pontine tegmentum normally differs from that of the pontine base. We evaluated the Signal Intensity of the pontine tegmentum and pontine base on T2-weighted images from 38 neurologically healthy subjects. The subjects included 29 adults (16 males and 13 females, age range 23-48 years, mean age 39.5 years) and 9 children (4 boys and 5 girls (age range 4-9 years mean age 6.5 years). We compared the contrast-to-noise ratio (CNR) between the tegmentum and the base in the upper pons, midpons and lower pons, and evaluated the Signal Intensity ratio of the tegmentum to the base. The CNR was significantly higher for the tegmentum than the base at each level of the pons ( P
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Signal Intensity of the normal pontine tegmentum on t2 weighted mr imaging
Neuroradiology, 2006Co-Authors: Chiaki Asao, Masanori Imuta, Masamichi Hamaguchi, Katsuro Sagara, Yukunori Korogi, Toshinori Hirai, T. Okuda, Yoshitaka Goto, Yasuyuki YamashitaAbstract:On T2-weighted MR images, the pontine tegmentum frequently shows a Signal of high Intensity in neurologically healthy individuals. We examined whether the Signal Intensity of the pontine tegmentum normally differs from that of the pontine base. We evaluated the Signal Intensity of the pontine tegmentum and pontine base on T2-weighted images from 38 neurologically healthy subjects. The subjects included 29 adults (16 males and 13 females, age range 23-48 years, mean age 39.5 years) and 9 children (4 boys and 5 girls (age range 4-9 years mean age 6.5 years). We compared the contrast-to-noise ratio (CNR) between the tegmentum and the base in the upper pons, midpons and lower pons, and evaluated the Signal Intensity ratio of the tegmentum to the base. The CNR was significantly higher for the tegmentum than the base at each level of the pons (P<0.0001), and the Signal Intensity ratio of the tegmentum to the base in the upper pons was significantly higher in children than in adults (P<0.005). On T2-weighted images, a high Signal Intensity of the pontine tegmentum is frequently seen in neurologically healthy subjects. This finding should not be considered abnormal, particularly in children.
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value of phase shift gradient echo mr imaging in the differentiation of pelvic lesions with high Signal Intensity at t1 weighted imaging
Radiology, 1994Co-Authors: Yasuyuki Yamashita, Miyuki Torashima, Yoshimi Hatanaka, Mikihiko Harada, Y Sakamoto, Mutsumasa Takahashi, Kohji Miyazaki, Hitoshi OkamuraAbstract:PURPOSE: To assess the value of phase-shift gradient-echo magnetic resonance (MR) imaging with the fast low-angle shot (FLASH) technique in the differentiation of hemorrhagic tumors and teratomas. MATERIALS AND METHODS: T1- and T2-weighted spin-echo imaging and phase-shift MR imaging were performed in 60 patients. On T1-weighted images, the Signal Intensity of lesions was compared with that of intraperitoneal fat. Findings at MR imaging were compared with the surgical findings. The diagnostic performance of each pulse sequence was analyzed with receiver operating characteristic curves. RESULTS: Sixty high-Signal-Intensity lesions were identified in 45 patients at T1-weighted imaging. Hemorrhagic lesions and teratomas had similar Signal intensities on both T1- and T2-weighted images. Lesions were detected more decisively with FLASH imaging than with T1- and T2-weighted imaging. CONCLUSIONS: Phase-shift gradient-echo imaging is a readily available method for the differential diagnosis of lesions with high s...
Kaoru Funaki - One of the best experts on this subject based on the ideXlab platform.
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magnetic resonance guided focused ultrasound surgery for uterine fibroids relationship between the therapeutic effects and Signal Intensity of preexisting t2 weighted magnetic resonance images
American Journal of Obstetrics and Gynecology, 2007Co-Authors: Kaoru Funaki, Hidenobu Fukunishi, Tsuyoshi Funaki, Katsuhiro Sawada, Yasushi Kaji, Takeshi MaruoAbstract:Objective This study was undertaken to clarify the relationship between the Signal Intensity of T2-weighted magnetic resonance images and the therapeutic effect of magnetic resonance-guided focused ultrasound surgery (MRgFUS) on uterine fibroids. Study design Ninety-five fibroids in 63 patients were classified into 3 types based on the Signal Intensity of T2-weighted magnetic resonance images as follows: type 1, low Intensity; type 2, intermediate Intensity; type 3, high Intensity. The treated area ratio of MRgFUS and the volume reduction ratio 6 months after treatment were used as the indices of therapeutic effect. Results The treated area ratio of type 3 fibroids was the lowest among the 3 types ( P r = 0.64; P Conclusion The efficacy of MRgFUS correlates with the Signal Intensity of T2-weighted magnetic resonance images. Type 1 and type 2 fibroids are suitable candidates for MRgFUS, whereas type 3 fibroids are not.
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magnetic resonance guided focused ultrasound surgery for uterine fibroids relationship between the therapeutic effects and Signal Intensity of preexisting t2 weighted magnetic resonance images
American Journal of Obstetrics and Gynecology, 2007Co-Authors: Kaoru Funaki, Hidenobu Fukunishi, Tsuyoshi Funaki, Katsuhiro Sawada, Yasushi Kaji, Takeshi MaruoAbstract:OBJECTIVE: This study was undertaken to clarify the relationship between the Signal Intensity of T2-weighted magnetic resonance images and the therapeutic effect of magnetic resonance-guided focused ultrasound surgery (MRgFUS) on uterine fibroids. STUDY DESIGN: Ninety-five fibroids in 63 patients were classified into 3 types based on the Signal Intensity of T2-weighted magnetic resonance images as follows: type 1, low Intensity; type 2, intermediate Intensity; type 3, high Intensity. The treated area ratio of MRgFUS and the volume reduction ratio 6 months after treatment were used as the indices of therapeutic effect. RESULTS: The treated area ratio of type 3 fibroids was the lowest among the 3 types (P < .01). The volume reduction ratio correlated with the treated area ratio (r = 0.64; P < .01). CONCLUSION: The efficacy of MRgFUS correlates with the Signal Intensity of T2-weighted magnetic resonance images. Type 1 and type 2 fibroids are suitable candidates for MRgFUS, whereas type 3 fibroids are not.
Yasushi Kaji - One of the best experts on this subject based on the ideXlab platform.
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magnetic resonance guided focused ultrasound surgery for uterine fibroids relationship between the therapeutic effects and Signal Intensity of preexisting t2 weighted magnetic resonance images
American Journal of Obstetrics and Gynecology, 2007Co-Authors: Kaoru Funaki, Hidenobu Fukunishi, Tsuyoshi Funaki, Katsuhiro Sawada, Yasushi Kaji, Takeshi MaruoAbstract:Objective This study was undertaken to clarify the relationship between the Signal Intensity of T2-weighted magnetic resonance images and the therapeutic effect of magnetic resonance-guided focused ultrasound surgery (MRgFUS) on uterine fibroids. Study design Ninety-five fibroids in 63 patients were classified into 3 types based on the Signal Intensity of T2-weighted magnetic resonance images as follows: type 1, low Intensity; type 2, intermediate Intensity; type 3, high Intensity. The treated area ratio of MRgFUS and the volume reduction ratio 6 months after treatment were used as the indices of therapeutic effect. Results The treated area ratio of type 3 fibroids was the lowest among the 3 types ( P r = 0.64; P Conclusion The efficacy of MRgFUS correlates with the Signal Intensity of T2-weighted magnetic resonance images. Type 1 and type 2 fibroids are suitable candidates for MRgFUS, whereas type 3 fibroids are not.
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magnetic resonance guided focused ultrasound surgery for uterine fibroids relationship between the therapeutic effects and Signal Intensity of preexisting t2 weighted magnetic resonance images
American Journal of Obstetrics and Gynecology, 2007Co-Authors: Kaoru Funaki, Hidenobu Fukunishi, Tsuyoshi Funaki, Katsuhiro Sawada, Yasushi Kaji, Takeshi MaruoAbstract:OBJECTIVE: This study was undertaken to clarify the relationship between the Signal Intensity of T2-weighted magnetic resonance images and the therapeutic effect of magnetic resonance-guided focused ultrasound surgery (MRgFUS) on uterine fibroids. STUDY DESIGN: Ninety-five fibroids in 63 patients were classified into 3 types based on the Signal Intensity of T2-weighted magnetic resonance images as follows: type 1, low Intensity; type 2, intermediate Intensity; type 3, high Intensity. The treated area ratio of MRgFUS and the volume reduction ratio 6 months after treatment were used as the indices of therapeutic effect. RESULTS: The treated area ratio of type 3 fibroids was the lowest among the 3 types (P < .01). The volume reduction ratio correlated with the treated area ratio (r = 0.64; P < .01). CONCLUSION: The efficacy of MRgFUS correlates with the Signal Intensity of T2-weighted magnetic resonance images. Type 1 and type 2 fibroids are suitable candidates for MRgFUS, whereas type 3 fibroids are not.
Hidenobu Fukunishi - One of the best experts on this subject based on the ideXlab platform.
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magnetic resonance guided focused ultrasound surgery for uterine fibroids relationship between the therapeutic effects and Signal Intensity of preexisting t2 weighted magnetic resonance images
American Journal of Obstetrics and Gynecology, 2007Co-Authors: Kaoru Funaki, Hidenobu Fukunishi, Tsuyoshi Funaki, Katsuhiro Sawada, Yasushi Kaji, Takeshi MaruoAbstract:Objective This study was undertaken to clarify the relationship between the Signal Intensity of T2-weighted magnetic resonance images and the therapeutic effect of magnetic resonance-guided focused ultrasound surgery (MRgFUS) on uterine fibroids. Study design Ninety-five fibroids in 63 patients were classified into 3 types based on the Signal Intensity of T2-weighted magnetic resonance images as follows: type 1, low Intensity; type 2, intermediate Intensity; type 3, high Intensity. The treated area ratio of MRgFUS and the volume reduction ratio 6 months after treatment were used as the indices of therapeutic effect. Results The treated area ratio of type 3 fibroids was the lowest among the 3 types ( P r = 0.64; P Conclusion The efficacy of MRgFUS correlates with the Signal Intensity of T2-weighted magnetic resonance images. Type 1 and type 2 fibroids are suitable candidates for MRgFUS, whereas type 3 fibroids are not.
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magnetic resonance guided focused ultrasound surgery for uterine fibroids relationship between the therapeutic effects and Signal Intensity of preexisting t2 weighted magnetic resonance images
American Journal of Obstetrics and Gynecology, 2007Co-Authors: Kaoru Funaki, Hidenobu Fukunishi, Tsuyoshi Funaki, Katsuhiro Sawada, Yasushi Kaji, Takeshi MaruoAbstract:OBJECTIVE: This study was undertaken to clarify the relationship between the Signal Intensity of T2-weighted magnetic resonance images and the therapeutic effect of magnetic resonance-guided focused ultrasound surgery (MRgFUS) on uterine fibroids. STUDY DESIGN: Ninety-five fibroids in 63 patients were classified into 3 types based on the Signal Intensity of T2-weighted magnetic resonance images as follows: type 1, low Intensity; type 2, intermediate Intensity; type 3, high Intensity. The treated area ratio of MRgFUS and the volume reduction ratio 6 months after treatment were used as the indices of therapeutic effect. RESULTS: The treated area ratio of type 3 fibroids was the lowest among the 3 types (P < .01). The volume reduction ratio correlated with the treated area ratio (r = 0.64; P < .01). CONCLUSION: The efficacy of MRgFUS correlates with the Signal Intensity of T2-weighted magnetic resonance images. Type 1 and type 2 fibroids are suitable candidates for MRgFUS, whereas type 3 fibroids are not.
