The Experts below are selected from a list of 13839 Experts worldwide ranked by ideXlab platform
Hideharu Sugimoto - One of the best experts on this subject based on the ideXlab platform.
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visualization of the greater and lesser occipital nerves on three dimensional double echo steady state with water Excitation Sequence
Japanese Journal of Radiology, 2020Co-Authors: Tomohiro Kikuchi, Akifumi Fujita, Hiroyuki Fujii, Hideharu SugimotoAbstract:To investigate the ability of three-dimensional double-echo steady-state with water Excitation Sequence (3D-DESS-WE) in detecting the greater occipital nerve (GON) and the lesser occipital nerve (LON). We retrospectively reviewed 66 consecutive patients who underwent magnetic resonance imaging, including 3D-DESS-WE. Two readers evaluated the detectability [0 (poor) to 3 (excellent)] and thickness of the GON and LON. We calculated the average evaluation scores and interobserver variability for the detectability of the GON and LON. We also calculated the average nerve thickness for each of the two readers and the interobserver reproducibility for the thickness of the GON and LON. The interobserver variability was calculated using a weighted kappa analysis and the intraclass correlation coefficient (ICC) was used to evaluate the interobserver reproducibility of the nerve thickness. The respective average score, interobserver variability, thickness and interobserver reproducibility were 3.00, excellent (κ = 1.00), 1.07 ± 0.12 mm, and almost perfect (ICC = 0.82) for the GON and 1.81, good (κ = 0.73), 0.84 ± 0.11 mm, and substantial (ICC = 0.78) for the LON. The GON was significantly thicker than the LON (p < 0.001). The 3D-DESS-WE demonstrated excellent visualization of the GON and relatively good visualization of the LON.
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localization of parotid gland tumors in relation to the intraparotid facial nerve on 3d double echo steady state with water Excitation Sequence
American Journal of Neuroradiology, 2019Co-Authors: H Fujii, Akifumi Fujita, Hidenori Kanazawa, E Sung, Osamu Sakai, Hideharu SugimotoAbstract:BACKGROUND AND PURPOSE: Reliable preoperative facial nerve mapping may help avoid or minimize facial nerve injury during parotid tumor resection. The purpose of this study was to investigate the diagnostic performance of the 3D double-echo steady-state with water Excitation Sequence in localizing parotid gland tumors through direct visualization of the intraparotid facial nerve in comparison with indirect methods of estimating the facial nerve location. MATERIALS AND METHODS: We retrospectively reviewed 91 parotid gland tumors in 90 patients who underwent surgical resection and preoperative MR imaging, including the 3D double-echo steady-state with water Excitation Sequence. The tumor locations were categorized as deep or superficial on the basis of direct and 3 indirect methods: the facial nerve line, retromandibular vein, and Utrecht line. Surgical localization was considered the criterion standard. The diagnostic performance for localizing deep lobe lesions using direct and indirect methods was calculated and compared using the McNemar test. RESULTS: Surgical localization confirmed 75 superficial lesions and 16 deep lesions. The interobserver variability of the 3D double-echo steady-state with water Excitation Sequence was excellent (κ = 0.870). The diagnostic accuracy, sensitivity, specificity, positive predictive value, and negative predictive value for localizing deep lobe lesions using the 3D double-echo steady-state with water Excitation method were 97.8%, 87.5%, 100%, 100%, and 97.4%, respectively. These findings were significantly higher than the facial nerve line in sensitivity, the retromandibular vein in sensitivity, and the Utrecht line in accuracy and specificity (P CONCLUSIONS: We can achieve higher diagnostic performance in localizing parotid gland tumors by directly visualizing the intraparotid facial nerve using the 3D double-echo steady-state with water Excitation Sequence compared with indirect methods.
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visualization of the peripheral branches of the mandibular division of the trigeminal nerve on 3d double echo steady state with water Excitation Sequence
American Journal of Neuroradiology, 2015Co-Authors: H Fujii, Akifumi Fujita, Hidenori Kanazawa, Osamu Sakai, A Yang, Karen Buch, Hideharu SugimotoAbstract:BACKGROUND AND PURPOSE: Although visualization of the extracranial branches of the cranial nerves has improved with advances in MR imaging, only limited studies have assessed the detection of extracranial branches of the mandibular nerve (V3). We investigated the detectability of the branches of V3 on a 3D double-echo steady-state with water Excitation Sequence. MATERIALS AND METHODS: We retrospectively evaluated the detectability of the 6 branches of the V3, the masseteric, buccal, auriculotemporal, lingual, inferior alveolar, and mylohyoid nerves, by using a 5-point scale (4, excellent; 3, good; 2, fair; 1, poor; and 0, none) in 86 consecutive patients who underwent MR imaging with the 3D double-echo steady-state with water Excitation Sequence. Weighted κ analysis was used to calculate interobserver variability among the 3 readers. RESULTS: The detection of the lingual and inferior alveolar nerves was the most successful, with excellent average scores of 3.80 and 3.99, respectively. The detection of the masseteric, the buccal, and the auriculotemporal nerves was good, with average scores of 3.31, 2.67, and 3.11, respectively. The mylohyoid nerve was difficult to detect with poor average scores of 0.62. All nerves had excellent interobserver variability across the 3 readers (average weighted κ value, 0.95–1.00). CONCLUSIONS: The 3D double-echo steady-state with water Excitation Sequence demonstrated excellent visualization of the extracranial branches of V3 in most patients. The 3D double-echo steady-state with water Excitation Sequence has the potential for diagnosing V3 pathologies and preoperatively identifying peripheral cranial nerves to prevent surgical complications.
H Fujii - One of the best experts on this subject based on the ideXlab platform.
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localization of parotid gland tumors in relation to the intraparotid facial nerve on 3d double echo steady state with water Excitation Sequence
American Journal of Neuroradiology, 2019Co-Authors: H Fujii, Akifumi Fujita, Hidenori Kanazawa, E Sung, Osamu Sakai, Hideharu SugimotoAbstract:BACKGROUND AND PURPOSE: Reliable preoperative facial nerve mapping may help avoid or minimize facial nerve injury during parotid tumor resection. The purpose of this study was to investigate the diagnostic performance of the 3D double-echo steady-state with water Excitation Sequence in localizing parotid gland tumors through direct visualization of the intraparotid facial nerve in comparison with indirect methods of estimating the facial nerve location. MATERIALS AND METHODS: We retrospectively reviewed 91 parotid gland tumors in 90 patients who underwent surgical resection and preoperative MR imaging, including the 3D double-echo steady-state with water Excitation Sequence. The tumor locations were categorized as deep or superficial on the basis of direct and 3 indirect methods: the facial nerve line, retromandibular vein, and Utrecht line. Surgical localization was considered the criterion standard. The diagnostic performance for localizing deep lobe lesions using direct and indirect methods was calculated and compared using the McNemar test. RESULTS: Surgical localization confirmed 75 superficial lesions and 16 deep lesions. The interobserver variability of the 3D double-echo steady-state with water Excitation Sequence was excellent (κ = 0.870). The diagnostic accuracy, sensitivity, specificity, positive predictive value, and negative predictive value for localizing deep lobe lesions using the 3D double-echo steady-state with water Excitation method were 97.8%, 87.5%, 100%, 100%, and 97.4%, respectively. These findings were significantly higher than the facial nerve line in sensitivity, the retromandibular vein in sensitivity, and the Utrecht line in accuracy and specificity (P CONCLUSIONS: We can achieve higher diagnostic performance in localizing parotid gland tumors by directly visualizing the intraparotid facial nerve using the 3D double-echo steady-state with water Excitation Sequence compared with indirect methods.
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visualization of the peripheral branches of the mandibular division of the trigeminal nerve on 3d double echo steady state with water Excitation Sequence
American Journal of Neuroradiology, 2015Co-Authors: H Fujii, Akifumi Fujita, Hidenori Kanazawa, Osamu Sakai, A Yang, Karen Buch, Hideharu SugimotoAbstract:BACKGROUND AND PURPOSE: Although visualization of the extracranial branches of the cranial nerves has improved with advances in MR imaging, only limited studies have assessed the detection of extracranial branches of the mandibular nerve (V3). We investigated the detectability of the branches of V3 on a 3D double-echo steady-state with water Excitation Sequence. MATERIALS AND METHODS: We retrospectively evaluated the detectability of the 6 branches of the V3, the masseteric, buccal, auriculotemporal, lingual, inferior alveolar, and mylohyoid nerves, by using a 5-point scale (4, excellent; 3, good; 2, fair; 1, poor; and 0, none) in 86 consecutive patients who underwent MR imaging with the 3D double-echo steady-state with water Excitation Sequence. Weighted κ analysis was used to calculate interobserver variability among the 3 readers. RESULTS: The detection of the lingual and inferior alveolar nerves was the most successful, with excellent average scores of 3.80 and 3.99, respectively. The detection of the masseteric, the buccal, and the auriculotemporal nerves was good, with average scores of 3.31, 2.67, and 3.11, respectively. The mylohyoid nerve was difficult to detect with poor average scores of 0.62. All nerves had excellent interobserver variability across the 3 readers (average weighted κ value, 0.95–1.00). CONCLUSIONS: The 3D double-echo steady-state with water Excitation Sequence demonstrated excellent visualization of the extracranial branches of V3 in most patients. The 3D double-echo steady-state with water Excitation Sequence has the potential for diagnosing V3 pathologies and preoperatively identifying peripheral cranial nerves to prevent surgical complications.
Akifumi Fujita - One of the best experts on this subject based on the ideXlab platform.
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visualization of the greater and lesser occipital nerves on three dimensional double echo steady state with water Excitation Sequence
Japanese Journal of Radiology, 2020Co-Authors: Tomohiro Kikuchi, Akifumi Fujita, Hiroyuki Fujii, Hideharu SugimotoAbstract:To investigate the ability of three-dimensional double-echo steady-state with water Excitation Sequence (3D-DESS-WE) in detecting the greater occipital nerve (GON) and the lesser occipital nerve (LON). We retrospectively reviewed 66 consecutive patients who underwent magnetic resonance imaging, including 3D-DESS-WE. Two readers evaluated the detectability [0 (poor) to 3 (excellent)] and thickness of the GON and LON. We calculated the average evaluation scores and interobserver variability for the detectability of the GON and LON. We also calculated the average nerve thickness for each of the two readers and the interobserver reproducibility for the thickness of the GON and LON. The interobserver variability was calculated using a weighted kappa analysis and the intraclass correlation coefficient (ICC) was used to evaluate the interobserver reproducibility of the nerve thickness. The respective average score, interobserver variability, thickness and interobserver reproducibility were 3.00, excellent (κ = 1.00), 1.07 ± 0.12 mm, and almost perfect (ICC = 0.82) for the GON and 1.81, good (κ = 0.73), 0.84 ± 0.11 mm, and substantial (ICC = 0.78) for the LON. The GON was significantly thicker than the LON (p < 0.001). The 3D-DESS-WE demonstrated excellent visualization of the GON and relatively good visualization of the LON.
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localization of parotid gland tumors in relation to the intraparotid facial nerve on 3d double echo steady state with water Excitation Sequence
American Journal of Neuroradiology, 2019Co-Authors: H Fujii, Akifumi Fujita, Hidenori Kanazawa, E Sung, Osamu Sakai, Hideharu SugimotoAbstract:BACKGROUND AND PURPOSE: Reliable preoperative facial nerve mapping may help avoid or minimize facial nerve injury during parotid tumor resection. The purpose of this study was to investigate the diagnostic performance of the 3D double-echo steady-state with water Excitation Sequence in localizing parotid gland tumors through direct visualization of the intraparotid facial nerve in comparison with indirect methods of estimating the facial nerve location. MATERIALS AND METHODS: We retrospectively reviewed 91 parotid gland tumors in 90 patients who underwent surgical resection and preoperative MR imaging, including the 3D double-echo steady-state with water Excitation Sequence. The tumor locations were categorized as deep or superficial on the basis of direct and 3 indirect methods: the facial nerve line, retromandibular vein, and Utrecht line. Surgical localization was considered the criterion standard. The diagnostic performance for localizing deep lobe lesions using direct and indirect methods was calculated and compared using the McNemar test. RESULTS: Surgical localization confirmed 75 superficial lesions and 16 deep lesions. The interobserver variability of the 3D double-echo steady-state with water Excitation Sequence was excellent (κ = 0.870). The diagnostic accuracy, sensitivity, specificity, positive predictive value, and negative predictive value for localizing deep lobe lesions using the 3D double-echo steady-state with water Excitation method were 97.8%, 87.5%, 100%, 100%, and 97.4%, respectively. These findings were significantly higher than the facial nerve line in sensitivity, the retromandibular vein in sensitivity, and the Utrecht line in accuracy and specificity (P CONCLUSIONS: We can achieve higher diagnostic performance in localizing parotid gland tumors by directly visualizing the intraparotid facial nerve using the 3D double-echo steady-state with water Excitation Sequence compared with indirect methods.
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visualization of the peripheral branches of the mandibular division of the trigeminal nerve on 3d double echo steady state with water Excitation Sequence
American Journal of Neuroradiology, 2015Co-Authors: H Fujii, Akifumi Fujita, Hidenori Kanazawa, Osamu Sakai, A Yang, Karen Buch, Hideharu SugimotoAbstract:BACKGROUND AND PURPOSE: Although visualization of the extracranial branches of the cranial nerves has improved with advances in MR imaging, only limited studies have assessed the detection of extracranial branches of the mandibular nerve (V3). We investigated the detectability of the branches of V3 on a 3D double-echo steady-state with water Excitation Sequence. MATERIALS AND METHODS: We retrospectively evaluated the detectability of the 6 branches of the V3, the masseteric, buccal, auriculotemporal, lingual, inferior alveolar, and mylohyoid nerves, by using a 5-point scale (4, excellent; 3, good; 2, fair; 1, poor; and 0, none) in 86 consecutive patients who underwent MR imaging with the 3D double-echo steady-state with water Excitation Sequence. Weighted κ analysis was used to calculate interobserver variability among the 3 readers. RESULTS: The detection of the lingual and inferior alveolar nerves was the most successful, with excellent average scores of 3.80 and 3.99, respectively. The detection of the masseteric, the buccal, and the auriculotemporal nerves was good, with average scores of 3.31, 2.67, and 3.11, respectively. The mylohyoid nerve was difficult to detect with poor average scores of 0.62. All nerves had excellent interobserver variability across the 3 readers (average weighted κ value, 0.95–1.00). CONCLUSIONS: The 3D double-echo steady-state with water Excitation Sequence demonstrated excellent visualization of the extracranial branches of V3 in most patients. The 3D double-echo steady-state with water Excitation Sequence has the potential for diagnosing V3 pathologies and preoperatively identifying peripheral cranial nerves to prevent surgical complications.
Osamu Sakai - One of the best experts on this subject based on the ideXlab platform.
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localization of parotid gland tumors in relation to the intraparotid facial nerve on 3d double echo steady state with water Excitation Sequence
American Journal of Neuroradiology, 2019Co-Authors: H Fujii, Akifumi Fujita, Hidenori Kanazawa, E Sung, Osamu Sakai, Hideharu SugimotoAbstract:BACKGROUND AND PURPOSE: Reliable preoperative facial nerve mapping may help avoid or minimize facial nerve injury during parotid tumor resection. The purpose of this study was to investigate the diagnostic performance of the 3D double-echo steady-state with water Excitation Sequence in localizing parotid gland tumors through direct visualization of the intraparotid facial nerve in comparison with indirect methods of estimating the facial nerve location. MATERIALS AND METHODS: We retrospectively reviewed 91 parotid gland tumors in 90 patients who underwent surgical resection and preoperative MR imaging, including the 3D double-echo steady-state with water Excitation Sequence. The tumor locations were categorized as deep or superficial on the basis of direct and 3 indirect methods: the facial nerve line, retromandibular vein, and Utrecht line. Surgical localization was considered the criterion standard. The diagnostic performance for localizing deep lobe lesions using direct and indirect methods was calculated and compared using the McNemar test. RESULTS: Surgical localization confirmed 75 superficial lesions and 16 deep lesions. The interobserver variability of the 3D double-echo steady-state with water Excitation Sequence was excellent (κ = 0.870). The diagnostic accuracy, sensitivity, specificity, positive predictive value, and negative predictive value for localizing deep lobe lesions using the 3D double-echo steady-state with water Excitation method were 97.8%, 87.5%, 100%, 100%, and 97.4%, respectively. These findings were significantly higher than the facial nerve line in sensitivity, the retromandibular vein in sensitivity, and the Utrecht line in accuracy and specificity (P CONCLUSIONS: We can achieve higher diagnostic performance in localizing parotid gland tumors by directly visualizing the intraparotid facial nerve using the 3D double-echo steady-state with water Excitation Sequence compared with indirect methods.
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visualization of the peripheral branches of the mandibular division of the trigeminal nerve on 3d double echo steady state with water Excitation Sequence
American Journal of Neuroradiology, 2015Co-Authors: H Fujii, Akifumi Fujita, Hidenori Kanazawa, Osamu Sakai, A Yang, Karen Buch, Hideharu SugimotoAbstract:BACKGROUND AND PURPOSE: Although visualization of the extracranial branches of the cranial nerves has improved with advances in MR imaging, only limited studies have assessed the detection of extracranial branches of the mandibular nerve (V3). We investigated the detectability of the branches of V3 on a 3D double-echo steady-state with water Excitation Sequence. MATERIALS AND METHODS: We retrospectively evaluated the detectability of the 6 branches of the V3, the masseteric, buccal, auriculotemporal, lingual, inferior alveolar, and mylohyoid nerves, by using a 5-point scale (4, excellent; 3, good; 2, fair; 1, poor; and 0, none) in 86 consecutive patients who underwent MR imaging with the 3D double-echo steady-state with water Excitation Sequence. Weighted κ analysis was used to calculate interobserver variability among the 3 readers. RESULTS: The detection of the lingual and inferior alveolar nerves was the most successful, with excellent average scores of 3.80 and 3.99, respectively. The detection of the masseteric, the buccal, and the auriculotemporal nerves was good, with average scores of 3.31, 2.67, and 3.11, respectively. The mylohyoid nerve was difficult to detect with poor average scores of 0.62. All nerves had excellent interobserver variability across the 3 readers (average weighted κ value, 0.95–1.00). CONCLUSIONS: The 3D double-echo steady-state with water Excitation Sequence demonstrated excellent visualization of the extracranial branches of V3 in most patients. The 3D double-echo steady-state with water Excitation Sequence has the potential for diagnosing V3 pathologies and preoperatively identifying peripheral cranial nerves to prevent surgical complications.
Hidenori Kanazawa - One of the best experts on this subject based on the ideXlab platform.
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localization of parotid gland tumors in relation to the intraparotid facial nerve on 3d double echo steady state with water Excitation Sequence
American Journal of Neuroradiology, 2019Co-Authors: H Fujii, Akifumi Fujita, Hidenori Kanazawa, E Sung, Osamu Sakai, Hideharu SugimotoAbstract:BACKGROUND AND PURPOSE: Reliable preoperative facial nerve mapping may help avoid or minimize facial nerve injury during parotid tumor resection. The purpose of this study was to investigate the diagnostic performance of the 3D double-echo steady-state with water Excitation Sequence in localizing parotid gland tumors through direct visualization of the intraparotid facial nerve in comparison with indirect methods of estimating the facial nerve location. MATERIALS AND METHODS: We retrospectively reviewed 91 parotid gland tumors in 90 patients who underwent surgical resection and preoperative MR imaging, including the 3D double-echo steady-state with water Excitation Sequence. The tumor locations were categorized as deep or superficial on the basis of direct and 3 indirect methods: the facial nerve line, retromandibular vein, and Utrecht line. Surgical localization was considered the criterion standard. The diagnostic performance for localizing deep lobe lesions using direct and indirect methods was calculated and compared using the McNemar test. RESULTS: Surgical localization confirmed 75 superficial lesions and 16 deep lesions. The interobserver variability of the 3D double-echo steady-state with water Excitation Sequence was excellent (κ = 0.870). The diagnostic accuracy, sensitivity, specificity, positive predictive value, and negative predictive value for localizing deep lobe lesions using the 3D double-echo steady-state with water Excitation method were 97.8%, 87.5%, 100%, 100%, and 97.4%, respectively. These findings were significantly higher than the facial nerve line in sensitivity, the retromandibular vein in sensitivity, and the Utrecht line in accuracy and specificity (P CONCLUSIONS: We can achieve higher diagnostic performance in localizing parotid gland tumors by directly visualizing the intraparotid facial nerve using the 3D double-echo steady-state with water Excitation Sequence compared with indirect methods.
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visualization of the peripheral branches of the mandibular division of the trigeminal nerve on 3d double echo steady state with water Excitation Sequence
American Journal of Neuroradiology, 2015Co-Authors: H Fujii, Akifumi Fujita, Hidenori Kanazawa, Osamu Sakai, A Yang, Karen Buch, Hideharu SugimotoAbstract:BACKGROUND AND PURPOSE: Although visualization of the extracranial branches of the cranial nerves has improved with advances in MR imaging, only limited studies have assessed the detection of extracranial branches of the mandibular nerve (V3). We investigated the detectability of the branches of V3 on a 3D double-echo steady-state with water Excitation Sequence. MATERIALS AND METHODS: We retrospectively evaluated the detectability of the 6 branches of the V3, the masseteric, buccal, auriculotemporal, lingual, inferior alveolar, and mylohyoid nerves, by using a 5-point scale (4, excellent; 3, good; 2, fair; 1, poor; and 0, none) in 86 consecutive patients who underwent MR imaging with the 3D double-echo steady-state with water Excitation Sequence. Weighted κ analysis was used to calculate interobserver variability among the 3 readers. RESULTS: The detection of the lingual and inferior alveolar nerves was the most successful, with excellent average scores of 3.80 and 3.99, respectively. The detection of the masseteric, the buccal, and the auriculotemporal nerves was good, with average scores of 3.31, 2.67, and 3.11, respectively. The mylohyoid nerve was difficult to detect with poor average scores of 0.62. All nerves had excellent interobserver variability across the 3 readers (average weighted κ value, 0.95–1.00). CONCLUSIONS: The 3D double-echo steady-state with water Excitation Sequence demonstrated excellent visualization of the extracranial branches of V3 in most patients. The 3D double-echo steady-state with water Excitation Sequence has the potential for diagnosing V3 pathologies and preoperatively identifying peripheral cranial nerves to prevent surgical complications.
