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Kojima T, Yamasaki Y, Matsuura Y, Mikayama R, Shirasaka T, Kondo M, Kamitani T, Kato T, Ishigami K, Yabuuchi H. The Feasibility of Deep Learning-Based Reconstruction for Low-Tube-Voltage CT Angiography for Transcatheter Aortic Valve Implantation. J Comput Assist Tomogr 2024; 48:77-84. [PMID: 37574664 DOI: 10.1097/rct.0000000000001525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/15/2023]
Abstract
OBJECTIVE The purpose of this study is to evaluate the efficacy of deep learning reconstruction (DLR) on low-tube-voltage computed tomographic angiography (CTA) for transcatheter aortic valve implantation (TAVI). METHODS We enrolled 30 patients who underwent TAVI-CT on a 320-row CT scanner. Electrocardiogram-gated coronary CTA (CCTA) was performed at 100 kV, followed by nongated aortoiliac CTA at 80 kV using a single bolus of contrast material. We used hybrid-iterative reconstruction (HIR), model-based IR (MBIR), and DLR to reconstruct these images. The contrast-to-noise ratios (CNRs) were calculated. Five-point scales were used for the overall image quality analysis. The diameter of the aortic annulus was measured in each reconstructed image, and we compared the interobserver and intraobserver agreements. RESULTS In the CCTA, the CNR and image quality score for DLR were significantly higher than those for HIR and MBIR ( P < 0.01). In the aortoiliac CTA, the CNR for DLR was significantly higher than that for HIR ( P < 0.01) and significantly lower than that for MBIR ( P ≤ 0.02). The image quality score for DLR was significantly higher than that for HIR ( P < 0.01). No significant differences were observed between the image quality scores for DLR and MBIR. The measured aortic annulus diameter had high interobserver and intraobserver agreement regardless of the reconstruction method (all intraclass correlation coefficients, >0.89). CONCLUSIONS In low tube voltage TAVI-CT, DLR provides higher image quality than HIR, and DLR provides higher image quality than MBIR in CCTA and is visually comparable to MBIR in aortoiliac CTA.
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Affiliation(s)
- Tsukasa Kojima
- From the Division of Radiology, Department of Medical Technology, Kyushu University Hospital
| | | | | | | | | | - Masatoshi Kondo
- Department of Health Sciences, Faculty of Medical Sciences, Kyushu University, Fukuoka, Japan
| | | | - Toyoyuki Kato
- From the Division of Radiology, Department of Medical Technology, Kyushu University Hospital
| | | | - Hidetake Yabuuchi
- Department of Health Sciences, Faculty of Medical Sciences, Kyushu University, Fukuoka, Japan
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Yamasaki Y, Abe K, Kamitani T, Hosokawa K, Hida T, Sagiyama K, Matsuura Y, Baba S, Isoda T, Maruoka Y, Kitamura Y, Moriyama S, Yoshikawa H, Fukumoto T, Yabuuchi H, Ishigami K. Efficacy of Dynamic Chest Radiography for Chronic Thromboembolic Pulmonary Hypertension. Radiology 2023; 306:e220908. [PMID: 36346313 DOI: 10.1148/radiol.220908] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Background While current guidelines require lung ventilation-perfusion (V/Q) scanning as the first step to diagnose chronic pulmonary embolism in pulmonary hypertension (PH), its use may be limited by low availability and/or exposure to ionizing radiation. Purpose To compare the performance of dynamic chest radiography (DCR) and lung V/Q scanning for detection of chronic thromboembolic PH (CTEPH). Materials and Methods Patients with PH who underwent DCR and V/Q scanning in the supine position from December 2019 to July 2021 were retrospectively screened. The diagnosis of CTEPH was confirmed with right heart catheterization and invasive pulmonary angiography. Observer tests were conducted to evaluate the diagnostic accuracy of DCR and V/Q scanning. The lungs were divided into six areas (upper, middle, and lower for both) in the anteroposterior image, and the number of lung areas with thromboembolic perfusion defects was scored. Diagnostic performance was compared between DCR and V/Q scanning using the area under the receiver operating characteristic curve. Agreement between the interpretation of DCR and that of V/Q scanning was assessed using the Cohen kappa coefficient and percent agreement. Results A total of 50 patients with PH were analyzed: 29 with CTEPH (mean age, 64 years ± 15 [SD]; 19 women) and 21 without CTEPH (mean age, 61 years ± 22; 14 women). The sensitivity, specificity, and accuracy of DCR were 97%, 86%, and 92%, respectively, and those of V/Q scanning were 100%, 86%, and 94%, respectively. Areas under the receiver operating characteristic curve for DCR and V/Q scanning were 0.92 (95% CI: 0.79, 0.97) and 0.93 (95% CI: 0.78, 0.98). Agreement between the consensus interpretation of DCR and that of V/Q scanning was substantial (κ = 0.79 [95% CI: 0.61, 0.96], percent agreement = 0.9 [95% CI: 0.79, 0.95]). Conclusion Dynamic chest radiography had similar efficacy to ventilation-perfusion scanning in the detection of chronic thromboembolic pulmonary hypertension. © RSNA, 2022 Online supplemental material is available for this article. See also the editorial by Wandtke and Koproth-Joslin in this issue.
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Affiliation(s)
- Yuzo Yamasaki
- From the Departments of Clinical Radiology (Y.Y., T.K., T.H., K.S., Y. Matsuura, S.B., T.I., Y. Maruoka, Y.K., K.I.), Cardiovascular Medicine (K.A., K.H.), Hematology, Oncology & Cardiovascular Medicine (S.M.), and Health Sciences (H. Yabuuchi), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (H. Yoshikawa); and Healthcare Business Headquarters, Konica Minolta, Inc, Hachioji, Tokyo, Japan (T.F.)
| | - Kohtaro Abe
- From the Departments of Clinical Radiology (Y.Y., T.K., T.H., K.S., Y. Matsuura, S.B., T.I., Y. Maruoka, Y.K., K.I.), Cardiovascular Medicine (K.A., K.H.), Hematology, Oncology & Cardiovascular Medicine (S.M.), and Health Sciences (H. Yabuuchi), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (H. Yoshikawa); and Healthcare Business Headquarters, Konica Minolta, Inc, Hachioji, Tokyo, Japan (T.F.)
| | - Takeshi Kamitani
- From the Departments of Clinical Radiology (Y.Y., T.K., T.H., K.S., Y. Matsuura, S.B., T.I., Y. Maruoka, Y.K., K.I.), Cardiovascular Medicine (K.A., K.H.), Hematology, Oncology & Cardiovascular Medicine (S.M.), and Health Sciences (H. Yabuuchi), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (H. Yoshikawa); and Healthcare Business Headquarters, Konica Minolta, Inc, Hachioji, Tokyo, Japan (T.F.)
| | - Kazuya Hosokawa
- From the Departments of Clinical Radiology (Y.Y., T.K., T.H., K.S., Y. Matsuura, S.B., T.I., Y. Maruoka, Y.K., K.I.), Cardiovascular Medicine (K.A., K.H.), Hematology, Oncology & Cardiovascular Medicine (S.M.), and Health Sciences (H. Yabuuchi), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (H. Yoshikawa); and Healthcare Business Headquarters, Konica Minolta, Inc, Hachioji, Tokyo, Japan (T.F.)
| | - Tomoyuki Hida
- From the Departments of Clinical Radiology (Y.Y., T.K., T.H., K.S., Y. Matsuura, S.B., T.I., Y. Maruoka, Y.K., K.I.), Cardiovascular Medicine (K.A., K.H.), Hematology, Oncology & Cardiovascular Medicine (S.M.), and Health Sciences (H. Yabuuchi), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (H. Yoshikawa); and Healthcare Business Headquarters, Konica Minolta, Inc, Hachioji, Tokyo, Japan (T.F.)
| | - Koji Sagiyama
- From the Departments of Clinical Radiology (Y.Y., T.K., T.H., K.S., Y. Matsuura, S.B., T.I., Y. Maruoka, Y.K., K.I.), Cardiovascular Medicine (K.A., K.H.), Hematology, Oncology & Cardiovascular Medicine (S.M.), and Health Sciences (H. Yabuuchi), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (H. Yoshikawa); and Healthcare Business Headquarters, Konica Minolta, Inc, Hachioji, Tokyo, Japan (T.F.)
| | - Yuko Matsuura
- From the Departments of Clinical Radiology (Y.Y., T.K., T.H., K.S., Y. Matsuura, S.B., T.I., Y. Maruoka, Y.K., K.I.), Cardiovascular Medicine (K.A., K.H.), Hematology, Oncology & Cardiovascular Medicine (S.M.), and Health Sciences (H. Yabuuchi), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (H. Yoshikawa); and Healthcare Business Headquarters, Konica Minolta, Inc, Hachioji, Tokyo, Japan (T.F.)
| | - Shingo Baba
- From the Departments of Clinical Radiology (Y.Y., T.K., T.H., K.S., Y. Matsuura, S.B., T.I., Y. Maruoka, Y.K., K.I.), Cardiovascular Medicine (K.A., K.H.), Hematology, Oncology & Cardiovascular Medicine (S.M.), and Health Sciences (H. Yabuuchi), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (H. Yoshikawa); and Healthcare Business Headquarters, Konica Minolta, Inc, Hachioji, Tokyo, Japan (T.F.)
| | - Takuro Isoda
- From the Departments of Clinical Radiology (Y.Y., T.K., T.H., K.S., Y. Matsuura, S.B., T.I., Y. Maruoka, Y.K., K.I.), Cardiovascular Medicine (K.A., K.H.), Hematology, Oncology & Cardiovascular Medicine (S.M.), and Health Sciences (H. Yabuuchi), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (H. Yoshikawa); and Healthcare Business Headquarters, Konica Minolta, Inc, Hachioji, Tokyo, Japan (T.F.)
| | - Yasuhiro Maruoka
- From the Departments of Clinical Radiology (Y.Y., T.K., T.H., K.S., Y. Matsuura, S.B., T.I., Y. Maruoka, Y.K., K.I.), Cardiovascular Medicine (K.A., K.H.), Hematology, Oncology & Cardiovascular Medicine (S.M.), and Health Sciences (H. Yabuuchi), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (H. Yoshikawa); and Healthcare Business Headquarters, Konica Minolta, Inc, Hachioji, Tokyo, Japan (T.F.)
| | - Yoshiyuki Kitamura
- From the Departments of Clinical Radiology (Y.Y., T.K., T.H., K.S., Y. Matsuura, S.B., T.I., Y. Maruoka, Y.K., K.I.), Cardiovascular Medicine (K.A., K.H.), Hematology, Oncology & Cardiovascular Medicine (S.M.), and Health Sciences (H. Yabuuchi), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (H. Yoshikawa); and Healthcare Business Headquarters, Konica Minolta, Inc, Hachioji, Tokyo, Japan (T.F.)
| | - Shohei Moriyama
- From the Departments of Clinical Radiology (Y.Y., T.K., T.H., K.S., Y. Matsuura, S.B., T.I., Y. Maruoka, Y.K., K.I.), Cardiovascular Medicine (K.A., K.H.), Hematology, Oncology & Cardiovascular Medicine (S.M.), and Health Sciences (H. Yabuuchi), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (H. Yoshikawa); and Healthcare Business Headquarters, Konica Minolta, Inc, Hachioji, Tokyo, Japan (T.F.)
| | - Hideki Yoshikawa
- From the Departments of Clinical Radiology (Y.Y., T.K., T.H., K.S., Y. Matsuura, S.B., T.I., Y. Maruoka, Y.K., K.I.), Cardiovascular Medicine (K.A., K.H.), Hematology, Oncology & Cardiovascular Medicine (S.M.), and Health Sciences (H. Yabuuchi), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (H. Yoshikawa); and Healthcare Business Headquarters, Konica Minolta, Inc, Hachioji, Tokyo, Japan (T.F.)
| | - Takenori Fukumoto
- From the Departments of Clinical Radiology (Y.Y., T.K., T.H., K.S., Y. Matsuura, S.B., T.I., Y. Maruoka, Y.K., K.I.), Cardiovascular Medicine (K.A., K.H.), Hematology, Oncology & Cardiovascular Medicine (S.M.), and Health Sciences (H. Yabuuchi), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (H. Yoshikawa); and Healthcare Business Headquarters, Konica Minolta, Inc, Hachioji, Tokyo, Japan (T.F.)
| | - Hidetake Yabuuchi
- From the Departments of Clinical Radiology (Y.Y., T.K., T.H., K.S., Y. Matsuura, S.B., T.I., Y. Maruoka, Y.K., K.I.), Cardiovascular Medicine (K.A., K.H.), Hematology, Oncology & Cardiovascular Medicine (S.M.), and Health Sciences (H. Yabuuchi), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (H. Yoshikawa); and Healthcare Business Headquarters, Konica Minolta, Inc, Hachioji, Tokyo, Japan (T.F.)
| | - Kousei Ishigami
- From the Departments of Clinical Radiology (Y.Y., T.K., T.H., K.S., Y. Matsuura, S.B., T.I., Y. Maruoka, Y.K., K.I.), Cardiovascular Medicine (K.A., K.H.), Hematology, Oncology & Cardiovascular Medicine (S.M.), and Health Sciences (H. Yabuuchi), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (H. Yoshikawa); and Healthcare Business Headquarters, Konica Minolta, Inc, Hachioji, Tokyo, Japan (T.F.)
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Sakai Y, Hida T, Matsuura Y, Kamitani T, Onizuka Y, Shirasaka T, Kato T, Ishigami K. Impact of a new deep-learning-based reconstruction algorithm on image quality in ultra-high-resolution CT: clinical observational and phantom studies. Br J Radiol 2023; 96:20220731. [PMID: 36318483 PMCID: PMC10997025 DOI: 10.1259/bjr.20220731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 10/14/2022] [Accepted: 10/22/2022] [Indexed: 11/07/2022] Open
Abstract
OBJECTIVES To demonstrate the effect of an improved deep learning-based reconstruction (DLR) algorithm on Ultra-High-Resolution Computed Tomography (U-HRCT) scanners. METHODS Clinical and phantom studies were conducted. Thirty patients who underwent contrast-enhanced CT examination during the follow-up period were enrolled. Images were reconstructed using improved DLR [termed, New DLR, i.e., Advanced Intelligent Clear-IQ Engine (AiCE) Body Sharp] and conventional DLR (Conv DLR, AiCE Body) algorithms. Two radiologists assessed the overall image quality using a 5-point scale (5 = excellent; 1 = unacceptable). The noise power spectra (NPSs) were calculated to assess the frequency characteristics of the image noise, and the square root of area under the curve (√AUC NPS) between 0.05 and 0.50 cycle/mm was calculated as an indicator of the image noise. Dunnett's test was used for statistical analysis of the visual evaluation score, with statistical significance set at p < 0.05. RESULTS The overall image quality of New DLR was better than that of the Conv DLR (4.2 ± 0.4 and 3.3 ± 0.4, respectively; p < 0.0001). All New DLR images had an overall image quality score above the average or excellent. The √AUCNPS value of New DLR was lower than that of Conv DLR (13.8 and 14.2, respectively). The median values of reconstruction time required with New DLR and Conv DLR were 5.0 and 7.8 min, respectively. CONCLUSIONS The new DLR algorithm improved the image quality within a practical reconstruction time. ADVANCES IN KNOWLEDGE The new DLR enables us to choose whether to improve image quality or reduce the dose.
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Affiliation(s)
- Yuki Sakai
- Division of Radiology, Department of Medical Technology,
Kyushu University Hospital, 3-1-1 Maidashi, Higashi-ku,
Fukuoka, Japan
| | - Tomoyuki Hida
- Department of Clinical Radiology, Graduate School of Medical
Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku,
Fukuoka, Japan
| | - Yuko Matsuura
- Department of Clinical Radiology, Graduate School of Medical
Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku,
Fukuoka, Japan
| | - Takeshi Kamitani
- Department of Clinical Radiology, Graduate School of Medical
Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku,
Fukuoka, Japan
| | - Yasuhiro Onizuka
- Division of Radiology, Department of Medical Technology,
Kyushu University Hospital, 3-1-1 Maidashi, Higashi-ku,
Fukuoka, Japan
| | - Takashi Shirasaka
- Division of Radiology, Department of Medical Technology,
Kyushu University Hospital, 3-1-1 Maidashi, Higashi-ku,
Fukuoka, Japan
| | - Toyoyuki Kato
- Division of Radiology, Department of Medical Technology,
Kyushu University Hospital, 3-1-1 Maidashi, Higashi-ku,
Fukuoka, Japan
| | - Kousei Ishigami
- Department of Clinical Radiology, Graduate School of Medical
Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku,
Fukuoka, Japan
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Hashimoto K, Ariyasu R, Ichinose J, Matsuura Y, Nakao M, Amino Y, Uchibori K, Kitazono S, Yanagitani N, Okumura S, Nishio M, Mun M. EP02.01-006 Advances in the Treatment of Postoperative Recurrence of Non-Small Cell Lung Cancer and Their Real-World Impact on Survival. J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Yamamichi T, Ichinose J, Tamagawa S, Omura K, Hashimoto K, Matsuura Y, Nakao M, Okumura S, Mun M. EP02.01-014 Prognostic Classification of Early-Stage Lung Cancer Using Preoperative Prealbumin and D-dimer Levels. J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Ozone E, Matsuura Y, Suzuki T, Kuniyoshi K, Ohtori S. Evaluation of Suture Elongation of Flexor Tendons using the Pulvertaft Method: a Biomechanical Study using Cadaveric Specimens. Muscles Ligaments Tendons J 2022. [DOI: 10.32098/mltj.02.2022.19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Murayama Y, Kamitani T, Sagiyama K, Yamasaki Y, Hida T, Matsuura Y, Yasumatsu R, Yamamoto H, Yabuuchi H, Ishigami K. Evaluation of MR imaging findings differentiating parotid basal cell adenomas from other parotid tumors. Eur J Radiol 2021; 144:109980. [PMID: 34601323 DOI: 10.1016/j.ejrad.2021.109980] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Revised: 09/15/2021] [Accepted: 09/23/2021] [Indexed: 12/19/2022]
Abstract
PURPOSE To evaluate the usefulness of magnetic resonance imaging (MRI) to differentiate basal cell adenomas (BCAs) from other parotid tumors. METHOD A total of 136 patients with histologically proven parotid gland tumors (13 BCAs, 66 pleomorphic adenomas [PAs], 30 Warthin tumors [WTs], and 27 parotid cancers [PCs]) who underwent a cervical MRI study between December 2011 and March 2019 were retrospectively enrolled. The MRI findings of the tumors were evaluated by two board-certified radiologists. RESULTS All 13 of the BCAs showed smooth margins, while 19 of the 27 PCs showed irregular margins (p < 0.0001). Eleven BCAs had some cystic components, and five were cyst-dominant. The BCAs had significantly more cystic components than the PAs (p = 0.0077). The mean apparent diffusion coefficient (ADC) value of the BCAs was 1.21 ± 0.20 × 10-3 mm2/sec, which was equivalent to that of the PCs (1.12 ± 0.25 × 10-3 mm2/sec, p = 0.76), significantly lower than that of the PAs (1.61 ± 0.32 × 10-3 mm2/sec, p < 0.0001), and significantly higher than that of the WTs (0.81 ± 0.19 × 10-3 mm2/sec, p = 0.0004). The plateau time-intensity curve (TIC) was the most common type for both BCAs and PCs, seen in 8 of 12 BCAs and 21 of 26 PCs, with no significant difference between these groups (p = 0.34). CONCLUSIONS BCA should be considered a possibility when a parotid lesion has smooth margins with an entire capsule and includes a cystic component, even if the TIC and diffusion-weighted MR images suggest a malignant pattern.
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Affiliation(s)
- Yuriko Murayama
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Takeshi Kamitani
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
| | - Koji Sagiyama
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Yuzo Yamasaki
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Tomoyuki Hida
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Yuko Matsuura
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Ryuji Yasumatsu
- Department of Otorhinolaryngology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Hidetaka Yamamoto
- Department of Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Hidetake Yabuuchi
- Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Kousei Ishigami
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
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Matsuura Y, Ninomiya H, Hashimoto K, Ichinose J, Nakao M, Okumura S, Nishio M, Mun M. P53.04 Local Therapies vs. Specific TKIs as the Initial Treatment for Oligo-Recurrent Lung Adenocarcinoma With Driver Mutations. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Yamasaki Y, Kamitani T, Sagiyama K, Matsuura Y, Hida T, Nagata H. Model-based iterative reconstruction for 320-detector row CT angiography reduces radiation exposure in infants with complex congenital heart disease. ACTA ACUST UNITED AC 2021; 27:42-49. [PMID: 33290239 DOI: 10.5152/dir.2020.19633] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
PURPOSE We investigated the impact of model-based iterative reconstruction (MBIR) on 320-detector row computed tomography angiography (CTA) in infants with complex congenital heart disease (CHD). METHODS Seventy infants with complex CHD who underwent 320-detector row CTA (40 boys and 30 girls; age range, 0-22 months; median age, 60 days) were retrospectively evaluated. First, the images were reconstructed by filtered back projection (FBP), hybrid iterative reconstruction (HIR), or MBIR in 20 cases, and variables were compared among the three iterative reconstruction methods (IR test). Second, the variables were compared between 25 cases scanned using HIR and 25 cases scanned using MBIR, with a 20 standard deviation noise level for both. Attenuation values and contrast-to-noise ratios (CNRs) of the great vessels and heart chambers were calculated. Total dose-length products were recorded for all patients (radiation dose: RD test). RESULTS In the IR test, the mean CNR values were 4.8±1.3 for FBP, 6.9±1.4 for HIR, and 8.2±1.7 for MBIR (P < 0.0001). The best subjective image qualities in the great vessels and heart chambers were obtained with MBIR. In RD testing, no significant differences between HIR and MBIR in image quality (CNR: HIR, 8.4±2.4; MBIR, 8.3±2.4) were observed. The effective dose was significantly lower for MBIR than for HIR (0.7±0.2 vs. 1.1±0.3 mSv; P < 0.001). CONCLUSION The MBIR algorithm significantly improved image quality and decreased radiation exposure in 320-row CTA of infants with complex CHD, providing an alternative to FBP or HIR that is both safer and produces better results.
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Affiliation(s)
- Yuzo Yamasaki
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Takeshi Kamitani
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Koji Sagiyama
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Yuko Matsuura
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Tomoyuki Hida
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Hazumu Nagata
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Yamasaki Y, Kamitani T, Abe K, Hosokawa K, Sagiyama K, Hida T, Matsuura Y, Kitamura Y, Maruoka Y, Isoda T, Baba S, Yoshikawa H, Kuramoto T, Yabuuchi H, Ishigami K. Diagnosis of Pulmonary Hypertension Using Dynamic Chest Radiography. Am J Respir Crit Care Med 2021; 204:1336-1337. [PMID: 34102086 DOI: 10.1164/rccm.202102-0387im] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Yuzo Yamasaki
- Kyushu University, 12923, Clinical Radiology, Fukuoka, Japan;
| | | | - Kohtaro Abe
- Kyushu University Faculty of Medicine Graduate School of Medical Science, 38305, Departments of Advanced Cardiovascular Regulation and Therapeutics, Fukuoka, Japan
| | - Kazuya Hosokawa
- Kyushu University Hospital, 145181, Cardiovascular medicine, Fukuoka, Japan
| | - Koji Sagiyama
- Kyushu University, 12923, Clinical Radiology, Fukuoka, Japan
| | - Tomoyuki Hida
- Kyushu University, 12923, Clinical Radiology, Fukuoka, Japan
| | - Yuko Matsuura
- Kyushu University, 12923, Clinical Radiology, Fukuoka, Japan
| | | | | | - Takuro Isoda
- Kyushu University, 12923, Clinical radiology, Fukuoka, Japan
| | | | - Hideki Yoshikawa
- Kyushu University Hospital, 145181, Medical Technology, Fukuoka, Japan
| | - Taku Kuramoto
- Kyushu University Hospital, 145181, Medical Technology, Fukuoka, Japan
| | | | - Kousei Ishigami
- Kyushu University, 12923, Clinical Radiology, Fukuoka, Japan
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Yamasaki Y, Abe K, Kamitani T, Sagiyama K, Hida T, Hosokawa K, Matsuura Y, Hioki K, Nagao M, Yabuuchi H, Ishigami K. Right Ventricular Extracellular Volume with Dual-Layer Spectral Detector CT: Value in Chronic Thromboembolic Pulmonary Hypertension. Radiology 2021; 298:589-596. [PMID: 33497315 DOI: 10.1148/radiol.2020203719] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Background Right ventricular (RV) extracellular volumes (ECVs), as a surrogate for histologic fibrosis, have not been sufficiently investigated. Purpose To evaluate and compare RV and left ventricular (LV) ECVs obtained with dual-layer spectral detector CT (DLCT) in chronic thromboembolic pulmonary hypertension (CTEPH) and investigate the clinical importance of RV ECV. Materials and Methods Retrospective analysis was performed on data from 31 patients with CTEPH (17 were not treated with pulmonary endarterectomy [PEA] or balloon pulmonary angioplasty [BPA] and 14 were) and eight control subjects who underwent myocardial delayed enhancement (MDE) DLCT from January 2019 to June 2020. The ECVs in the RV and LV walls were calculated by using iodine density as derived from spectral data pertaining to MDE. Statistical analyses were performed with one-way repeated analysis of variance with the Tukey post hoc test or the Kruskal-Wallis test with the Steel-Dwass test and linear regression analysis. Results The PEA- and BPA-naive group showed significantly higher ECVs than the PEA- or BPA-treated group and control group in the septum (28.2% ± 2.9 vs 24.3% ± 3.6, P = .005), anterior right ventricular insertion point (RVIP) (32.9% ± 4.6 vs 25.3% ± 3.6, P < .001), posterior RVIP (35.2% ± 5.2 vs 27.3% ± 4.2, P < .001), mean RVIP (34.0% ± 4.2 vs 26.3% ± 3.4, P < .001), RV free wall (29.5% ± 3.3 vs 25.9% ± 4.1, P = .036), and mean RV wall (29.1% ± 3.0 vs 26.1% ± 3.1, P = .029). There were no significant differences between the PEA- or BPA-treated group and control subjects in these segments (septum, P = .93; anterior RVIP, P = .38; posterior RVIP, P = .52; mean RVIP, P = .36; RV free wall, P = .97; and mean RV, P = .33). There were significant correlations between ECV and mean pulmonary artery pressure (PAP) or brain natriuretic peptide (BNP) in the mean RVIP (mean PAP: R = 0.66, P < .001; BNP: R = 0.44, P = .014) and the mean RV (mean PAP: R = 0.49, P = .005; BNP: R = 0.44, P = .013). Conclusion Right ventricular and right ventricular insertion point extracellular volumes could be noninvasive surrogate markers of disease severity and reverse tissue remodeling in chronic thromboembolic pulmonary hypertension. © RSNA, 2021 Online supplemental material is available for this article. See also the editorial by Sandfort and Bluemke in this issue.
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Affiliation(s)
- Yuzo Yamasaki
- From the Departments of Clinical Radiology (Y.Y., T.K., K.S., T.H., Y.M., K.I.), Cardiovascular Medicine (K.A., K. Hosokawa), and Health Sciences (H.Y.), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (K. Hioki); and Department of Diagnostic Imaging and Nuclear Medicine, Tokyo Women's Medical University, Tokyo, Japan (M.N.)
| | - Kohtaro Abe
- From the Departments of Clinical Radiology (Y.Y., T.K., K.S., T.H., Y.M., K.I.), Cardiovascular Medicine (K.A., K. Hosokawa), and Health Sciences (H.Y.), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (K. Hioki); and Department of Diagnostic Imaging and Nuclear Medicine, Tokyo Women's Medical University, Tokyo, Japan (M.N.)
| | - Takeshi Kamitani
- From the Departments of Clinical Radiology (Y.Y., T.K., K.S., T.H., Y.M., K.I.), Cardiovascular Medicine (K.A., K. Hosokawa), and Health Sciences (H.Y.), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (K. Hioki); and Department of Diagnostic Imaging and Nuclear Medicine, Tokyo Women's Medical University, Tokyo, Japan (M.N.)
| | - Koji Sagiyama
- From the Departments of Clinical Radiology (Y.Y., T.K., K.S., T.H., Y.M., K.I.), Cardiovascular Medicine (K.A., K. Hosokawa), and Health Sciences (H.Y.), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (K. Hioki); and Department of Diagnostic Imaging and Nuclear Medicine, Tokyo Women's Medical University, Tokyo, Japan (M.N.)
| | - Tomoyuki Hida
- From the Departments of Clinical Radiology (Y.Y., T.K., K.S., T.H., Y.M., K.I.), Cardiovascular Medicine (K.A., K. Hosokawa), and Health Sciences (H.Y.), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (K. Hioki); and Department of Diagnostic Imaging and Nuclear Medicine, Tokyo Women's Medical University, Tokyo, Japan (M.N.)
| | - Kazuya Hosokawa
- From the Departments of Clinical Radiology (Y.Y., T.K., K.S., T.H., Y.M., K.I.), Cardiovascular Medicine (K.A., K. Hosokawa), and Health Sciences (H.Y.), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (K. Hioki); and Department of Diagnostic Imaging and Nuclear Medicine, Tokyo Women's Medical University, Tokyo, Japan (M.N.)
| | - Yuko Matsuura
- From the Departments of Clinical Radiology (Y.Y., T.K., K.S., T.H., Y.M., K.I.), Cardiovascular Medicine (K.A., K. Hosokawa), and Health Sciences (H.Y.), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (K. Hioki); and Department of Diagnostic Imaging and Nuclear Medicine, Tokyo Women's Medical University, Tokyo, Japan (M.N.)
| | - Kazuhito Hioki
- From the Departments of Clinical Radiology (Y.Y., T.K., K.S., T.H., Y.M., K.I.), Cardiovascular Medicine (K.A., K. Hosokawa), and Health Sciences (H.Y.), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (K. Hioki); and Department of Diagnostic Imaging and Nuclear Medicine, Tokyo Women's Medical University, Tokyo, Japan (M.N.)
| | - Michinobu Nagao
- From the Departments of Clinical Radiology (Y.Y., T.K., K.S., T.H., Y.M., K.I.), Cardiovascular Medicine (K.A., K. Hosokawa), and Health Sciences (H.Y.), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (K. Hioki); and Department of Diagnostic Imaging and Nuclear Medicine, Tokyo Women's Medical University, Tokyo, Japan (M.N.)
| | - Hidetake Yabuuchi
- From the Departments of Clinical Radiology (Y.Y., T.K., K.S., T.H., Y.M., K.I.), Cardiovascular Medicine (K.A., K. Hosokawa), and Health Sciences (H.Y.), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (K. Hioki); and Department of Diagnostic Imaging and Nuclear Medicine, Tokyo Women's Medical University, Tokyo, Japan (M.N.)
| | - Kousei Ishigami
- From the Departments of Clinical Radiology (Y.Y., T.K., K.S., T.H., Y.M., K.I.), Cardiovascular Medicine (K.A., K. Hosokawa), and Health Sciences (H.Y.), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (K. Hioki); and Department of Diagnostic Imaging and Nuclear Medicine, Tokyo Women's Medical University, Tokyo, Japan (M.N.)
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Yamasaki Y, Abe K, Kamitani T, Hosokawa K, Kawakubo M, Sagiyama K, Hida T, Matsuura Y, Murayama Y, Funatsu R, Tsutsui H, Yabuuchi H. Balloon pulmonary angioplasty improves right atrial reservoir and conduit functions in chronic thromboembolic pulmonary hypertension. Eur Heart J Cardiovasc Imaging 2020; 21:855-862. [PMID: 32359071 DOI: 10.1093/ehjci/jeaa064] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 02/26/2020] [Accepted: 03/20/2020] [Indexed: 11/12/2022] Open
Abstract
AIMS Right atrial (RA) function largely contributes to the maintenance of right ventricular (RV) function. This study investigated the effect of balloon pulmonary angioplasty (BPA) on RA functions in patients with inoperable chronic thromboembolic pulmonary hypertension (CTEPH) using cardiac magnetic resonance imaging (CMRI). METHODS AND RESULTS CMRI and RV catheterization were performed before BPA sessions and at the follow-up periods in 29 CTEPH patients. Reservoir [RA longitudinal strain (RA-LS)], passive conduit [RA early LS rate (LSR)], and active (RA late LSR) phases were assessed by using cine CMRI and a feature-tracking algorithm. The relationships between the changes in RA functions and in brain natriuretic peptide (BNP) were evaluated in both the dilated and non-dilated RA groups. RA-LS (32.4% vs. 42.7%), RA LSR (6.3% vs. 8.3%), and RA early LSR (-2.3% vs. -4.3%) were improved after BPA, whereas no significant change was seen in RA late LSR. The changes in RA peak LS and in RA early LSR were significantly correlated with the changes in BNP (ΔRA-LS: r = -0.63, ΔRA-early LSR: r = 0.65) and pulmonary vascular resistance (PVR) (ΔRA-LS: r = -0.69, ΔRA-early LSR: r = 0.66) in the nondilated RA group. CONCLUSION The RA reservoir and passive conduit functions were impaired in inoperable CTEPH, whereas RA active function was preserved. BPA markedly reversed these impaired functions. The improvements in RA reservoir and conduit functions were significantly correlated with the changes in BNP levels and PVR in CTEPH patients with normal RA sizes.
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Affiliation(s)
- Yuzo Yamasaki
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Kohtaro Abe
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Takeshi Kamitani
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Kazuya Hosokawa
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Masateru Kawakubo
- Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Koji Sagiyama
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Tomoyuki Hida
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Yuko Matsuura
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Yuriko Murayama
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Ryohei Funatsu
- Division of Radiology, Department of Medical Technology, Kyushu University Hospital, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Hiroyuki Tsutsui
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Hidetake Yabuuchi
- Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
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Kamitani T, Sagiyama K, Togao O, Yamasaki Y, Hida T, Matsuura Y, Murayama Y, Yasumatsu R, Yamamoto H, Yabuuchi H. Amide proton transfer (APT) imaging of parotid tumors: Differentiation of malignant and benign tumors. Eur J Radiol 2020; 129:109047. [PMID: 32460200 DOI: 10.1016/j.ejrad.2020.109047] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 04/25/2020] [Accepted: 05/04/2020] [Indexed: 11/25/2022]
Abstract
PURPOSE To assess the usefulness of amide proton transfer (APT) imaging in differentiating parotid tumors. MATERIAL AND METHODS We retrospectively analyzed 43 histopathologically proven parotid solid tumors with diameters ≥2 cm. Twenty-one tumors were benign and 12 tumors were malignant. Two-dimensional APT imaging was performed using a saturation pulse with a duration of 2 s and a saturation power level of 2 μT. For acquiring Z-spectra, the imaging was repeated at 25 saturation frequency offsets from ω = -6 to +6 ppm with a step of 0.5 ppm as well as one scan acquired far off-resonance (-1560 ppm) for signal normalization. For the APT imaging, the asymmetry analysis at 3.5 ppm downfield from the water signal was calculated. The mean APT signal intensity (SI) was compared between the benign and malignant tumors. RESULTS The mean APT SI was 2.23 ± 0.80 % in the benign tumors and significantly higher at 2.99 ± 0.99 % in the malignant tumors (P = 0.01). A receiver operating curve analysis revealed that the optimal APT SI threshold was 2.40 for distinguishing malignant tumors from benign tumors with an area under the curve of 0.74. The sensitivity, specificity, and accuracy were 83.3%, 61.3%, and 67.4%, respectively. CONCLUSION The mean APT SI of the malignant parotid tumors was significantly higher than that of the benign parotid tumors.
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Affiliation(s)
- Takeshi Kamitani
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
| | - Koji Sagiyama
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Osamu Togao
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Yuzo Yamasaki
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Tomoyuki Hida
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Yuko Matsuura
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Yuriko Murayama
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Ryuji Yasumatsu
- Department of Otorhinolaryngology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Hidetaka Yamamoto
- Department of Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Hidetake Yabuuchi
- Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
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Hino T, Kamitani T, Sagiyama K, Yamasaki Y, Matsuura Y, Tsutsui S, Sakai Y, Furuyama T, Yabuuchi H. Detectability of the artery of Adamkiewicz on computed tomography angiography of the aorta by using ultra-high-resolution computed tomography. Jpn J Radiol 2020; 38:658-665. [PMID: 32170567 DOI: 10.1007/s11604-020-00943-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Accepted: 03/02/2020] [Indexed: 11/26/2022]
Abstract
PURPOSE To evaluate the detectability of AKA on aortic computed tomography angiography (CTA) using ultra-high-resolution computed tomography (UHRCT). MATERIALS AND METHODS Twenty-eight patients were enrolled. They underwent aortic CTA with UHRCT (UHRCTA) and had previously undergone aortic conventional CTA (CCTA). The injection protocol of UHRCTA was the same as that of CCTA. The bolus tracking technique was used. UHRCTA images were reconstructed with adaptive iterative dose reduction (strong) and with forward-projected model-based iterative reconstruction solution. The matrix size and slice thickness on UHRCT were 1024 and 0.25 mm, respectively, and those on conventional CT were 512 and 0.5 or 0.67 mm, respectively. The UHRCTA and CCTA images were visually compared by using four scales. A score of 4 or 3 indicated that the AKA was assessable. In this instance, the contrast-to-noise ratios of each UHRCTA were measured. The exposure dose and signal-to-noise ratios were also investigated. RESULTS The AKA visualization scores obtained with UHRCTA with forward-projected model-based iterative reconstruction solution were significantly higher than those with adaptive iterative dose reduction (p = 0.018) and CCTA (p = 0.0024). CONCLUSION UHRCT can contribute to the better visualization of the AKA on aortic CTA.
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Affiliation(s)
- Takuya Hino
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Takeshi Kamitani
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
| | - Koji Sagiyama
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Yuzo Yamasaki
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Yuko Matsuura
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Soichiro Tsutsui
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Yuki Sakai
- Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan
| | - Tadashi Furuyama
- Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Hidetake Yabuuchi
- Health Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Nakao M, Ichinose J, Matsuura Y, Okumura S, Mun M. P1.17-06 Long-Term Oncological Outcome After Thoracoscopic Lobectomy for Non-Small Cell Lung Cancer Patients. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ichinose J, Ninomiya H, Nagano H, Matsuura Y, Nakao M, Okumura S, Mun M. MA18.03 Distinction Between Primary Lung Cancer and Pulmonary Metastasis of Esophageal Cancer Using the Nanostring nCounter System. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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17
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Kawaguchi Y, Nakao M, Ichinose J, Matsuura Y, Okumura S, Mun M. P2.13-14 The Utility of Three-Dimensional CT for Prediction of Tumor Invasiveness in Clinical IA Lung Acenocarcinoma. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Ninomiya H, Ichinose J, Matsuura Y, Nakao M, Mun M, Nishio M, Okumura S, Ishikawa Y. P1.09-20 Significance of Maximal Diameter Measurement in Small-Sized Adenocarcinomas. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Matsuura Y, Daimon M, Notomi Y, Miyasaka N, Yamaguchi Y, Doi S. Feasibility and Reproducibility of Fetal Left Ventricular Twist Using Two-Dimensional Speckle-Tracking Analysis in a Japanese Population. Int Heart J 2019; 60:671-678. [PMID: 31105153 DOI: 10.1536/ihj.18-480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
In fetal echocardiography, conventional parameters for assessing cardiac function are limited because of limited echocardiographic windows or the fetus' position. We aimed to evaluate the feasibility and reproducibility of fetal left ventricular (LV) twist by two-dimensional, speckle-tracking echocardiography (2DSTE) in a Japanese population.We included 55 normal fetuses at gestational ages between 21 and 36 weeks. Subjects with adverse maternal health issues were excluded. LV twist was calculated as the net difference between LV basal and apical rotation at end-systole estimated with 2DSTE.We were able to analyze the 2DSTE images in 44 cases (80%). The mean (±SE) apical rotation, basal rotation, and LV twist were 7.88 ± 0.77, -3.68 ± 0.50, and 11.1 ± 0.75 degrees, respectively. We could not analyze 11 cases (20%) because of poor image quality due to fetal position in five cases (45.5%), failure to track the endocardium because of blurred images in five cases (45.5%), and failure to obtain images of the heart due to the presence of the placenta in front of the fetus in one case (9.1%). There were no significant differences in the demographic data between pregnant women in whom LV twist analysis was feasible and not feasible. The intra- and interobserver intraclass correlation coefficients were 0.67 and 0.64, respectively.LV twist analysis by 2DSTE in the fetus was feasible in a substantial population and may provide new insight into cardiac function during the prenatal period. On the other hand, its reproducibility was moderate and needs to be improved.
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Affiliation(s)
- Yuko Matsuura
- Department of Pediatrics, Tokyo Medical And Dental University, Medical Hospital
| | - Masao Daimon
- Department of Cardiovascular Medicine, The University of Tokyo Hospital
| | | | - Naoyuki Miyasaka
- Department of Obstetrics and Gynecology, Tokyo Medical And Dental University, Medical Hospital
| | - Yohei Yamaguchi
- Department of Pediatrics, Tokyo Medical And Dental University, Medical Hospital
| | - Shozaburo Doi
- Department of Pediatrics, Tokyo Medical And Dental University, Medical Hospital
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Muramatsu T, Kashiwagi S, Ishizuka H, Matsuura Y, Furusawa M, Kimura M, Shibukawa Y. Alkaline extracellular conditions promote the proliferation and mineralization of a human cementoblast cell line. Int Endod J 2018; 52:639-645. [PMID: 30447154 DOI: 10.1111/iej.13044] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Accepted: 11/13/2018] [Indexed: 01/10/2023]
Abstract
AIM To investigate the proliferation and mineralization of a human cementoblast cell line under alkaline conditions. METHODOLOGY A human cementoblast cell line was cultured in alkaline media with several pHs (pH 7.6, 8.0 and 8.4) without CO2 . Cell numbers, phospho-p44/42 expression, alkaline phosphatase (ALP) activity and mineralization were evaluated. The significance of differences between groups was assessed using two-way analysis of variance 15 (ANOVA) followed by Bonferroni's multiple comparison test (α = 0.01). RESULTS Cell numbers increased in a time-dependent manner in the high pH medium groups. Western blot analysis revealed the upregulated expression of phospho-p44/42 under alkaline conditions. ALP activity was also increased at pH 8.0 and 8.4. Alizarin red staining revealed increased mineralization in the high pH medium groups. The incorporation of the transient receptor potential ankyrin subfamily member 1 (TRPA1) antagonist HC030031 markedly negated the effect on proliferation and mineralization. CONCLUSIONS Extracellular alkaline conditions promoted the proliferation and mineralization of human cementoblasts in vitro via TRPA1.
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Affiliation(s)
- T Muramatsu
- Department of Operative Dentistry, Cariology and Pulp Biology, Tokyo Dental College, Tokyo, Japan
| | - S Kashiwagi
- Department of Endodontics, Tokyo Dental College, Tokyo, Japan
| | - H Ishizuka
- Department of Operative Dentistry, Cariology and Pulp Biology, Tokyo Dental College, Tokyo, Japan
| | - Y Matsuura
- Oral Health Science Center, Tokyo Dental College, Tokyo, Japan
| | - M Furusawa
- Department of Endodontics, Tokyo Dental College, Tokyo, Japan
| | - M Kimura
- Department of Physiology, Tokyo Dental College, Tokyo, Japan
| | - Y Shibukawa
- Department of Physiology, Tokyo Dental College, Tokyo, Japan
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Ichinose J, Nakao M, Matsuura Y, Mun M, Nakagawa K, Nishio M, Okumura S. P1.11-07 Utility of the Maximum CT Value in Predicting Invasiveness of Pure GGNs. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Sato Y, Akagi R, Akatsu Y, Matsuura Y, Takahashi S, Yamaguchi S, Enomoto T, Nakagawa R, Hoshi H, Sasaki T, Kimura S, Ogawa Y, Sadamasu A, Ohtori S, Sasho T. The effect of femoral bone tunnel configuration on tendon-bone healing in an anterior cruciate ligament reconstruction: An animal study. Bone Joint Res 2018; 7:327-335. [PMID: 29922452 PMCID: PMC5987692 DOI: 10.1302/2046-3758.75.bjr-2017-0238.r2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Objectives To compare the effect of femoral bone tunnel configuration on tendon-bone healing in an anterior cruciate ligament (ACL) reconstruction animal model. Methods Anterior cruciate ligament reconstruction using the plantaris tendon as graft material was performed on both knees of 24 rabbits (48 knees) to mimic ACL reconstruction by two different suspensory fixation devices for graft fixation. For the adjustable fixation device model (Socket group; group S), a 5 mm deep socket was created in the lateral femoral condyle (LFC) of the right knee. For the fixed-loop model (Tunnel group; group T), a femoral tunnel penetrating the LFC was created in the left knee. Animals were sacrificed at four and eight weeks after surgery for histological evaluation and biomechanical testing. Results Histologically, both groups showed a mixture of direct and indirect healing patterns at four weeks, whereas only indirect healing patterns were observed in both groups at eight weeks. No significant histological differences were seen between the two groups at four and eight weeks in the roof zone (four weeks, S: mean 4.8 sd 1.7, T: mean 4.5 sd 0.5, p = 0.14; eight weeks, S: mean 5.8 sd 0.8, T: mean 4.8 sd 1.8, p = 0.88, Mann-Whitney U test) or side zone (four weeks, S: mean 5.0 sd 1.2, T: mean 4.8 sd 0.4, p = 0.43; eight weeks, S: mean 5.3 sd 0.8,T: mean 5.5 sd 0.8, p = 0.61, Mann-Whitney U test) . Similarly, no significant difference was seen in the maximum failure load between group S and group T at four (15.6 sd 9.0N and 13.1 sd 5.6N) or eight weeks (12.6 sd 3.6N and 17.1 sd 6.4N, respectively). Conclusion Regardless of bone tunnel configuration, tendon-bone healing after ACL reconstruction primarily occurred through indirect healing. No significant histological or mechanical differences were observed between adjustable and fixed-loop femoral cortical suspension methods. Cite this article: Y. Sato, R. Akagi, Y. Akatsu, Y. Matsuura, S. Takahashi, S. Yamaguchi, T. Enomoto, R. Nakagawa, H. Hoshi, T. Sasaki, S. Kimura, Y. Ogawa, A. Sadamasu, S. Ohtori, T. Sasho. The effect of femoral bone tunnel configuration on tendon-bone healing in an anterior cruciate ligament reconstruction: An animal study. Bone Joint Res 2018;7:327–335. DOI: 10.1302/2046-3758.75.BJR-2017-0238.R2.
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Affiliation(s)
- Y Sato
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - R Akagi
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Y Akatsu
- Department of Orthopedic Surgery, Toho University Sakura Medical Center, Chiba, Japan
| | - Y Matsuura
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - S Takahashi
- Clinical Research Center, Chiba University Hospital, Chiba, Japan
| | - S Yamaguchi
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - T Enomoto
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - R Nakagawa
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - H Hoshi
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - T Sasaki
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - S Kimura
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Y Ogawa
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - A Sadamasu
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - S Ohtori
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - T Sasho
- Department of Orthopaedic Surgery, Graduate School of Medicine and The Center for Preventive Medicine, Chiba University, Chiba, Japan
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Ueno M, Iijima H, Takeshita K, Takahashi H, Yoshida T, Uehara H, Igota H, Matsuura Y, Ikeda T, Azumaya M, Kaji K. Robustness of adult female survival maintains a high-density sika deer (Cervus nippon) population following the initial irruption. Wildl Res 2018. [DOI: 10.1071/wr17103] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Context Irruption of large herbivore populations is characterised by three distinct phases: (1) an exponential increase in population to a peak abundance; (2) a population crash; and (3) a second increase to another population peak, typically lower than the first peak of abundance. However, there has been little study of age- and sex-specific factors that affect the post-initial irruption interactions with food sources. Aims We aimed to investigate annual survival rates of sika deer (Cervus nippon Temminck, 1838) in the sequent irruption of a population on Nakanoshima Island, Lake Toya, Japan, with a chronically high density during the period 2002–12. Methods Survival monitoring data were obtained for 219 individuals (93 males and 126 females) using radio-collars. Annual survival was quantified, and related factors, i.e. deer abundance and winter severity, were determined by model selection using Akaike information criterion values. Key Results The results showed that annual survival rates across sexes and age classes (fawn, yearling, prime-aged, old) decreased with increasing population density, snow depth and winter precipitation. Winter severity had a greater effect on adult survival than density regulation. Nevertheless, female adult survival was maintained at a high level, with a mean of 0.84 (95% CI: 0.80–0.88). Key conclusions Robust survival rates for adult females might contribute to the maintenance of a high-density sika deer population in the post-initial irruption. Implications We suggest that in the absence of predation and hunting, sika deer population is not able to self-regulate to the density level that avoids an irreversible impact on plants.
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Yanada M, Matsuura Y, Inoue M. P2.16-016 Surgical Treatment of Indeterminate Lung Nodules. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Mun M, Sakao Y, Ichinose J, Matsuura Y, Nakao M, Nakagawa K, Ninomiya H, Motoi N, Urano Y, Okumura S, Ishikawa Y. P3.13-009 Rapid Detection of Lung Cancer by Fluorescent Imaging Using A γ-Glutamyltranspeptidase-Activatable Fluorescent Probe. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Ichinose J, Matsuura Y, Nakao M, Mun M, Nakagawa K, Okumura S. P1.13-005 Is Tumor Size for the T4 Descriptor in Lung Cancer Staging Appropriate? J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Sho T, Hachisuga T, Koi C, Kurita T, Kagami S, Kawagoe T, Matsuura Y, Yoshimura K, Hisaoka M. 17β-Estradiol induces proliferation of endometrial NK cells (CD56+) in postmenopausal women. Climacteric 2017; 20:571-576. [PMID: 28933961 DOI: 10.1080/13697137.2017.1377173] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
OBJECTIVE The aim of this report was to evaluate the impact of hormone replacement therapy (HRT) on lymphocytic infiltration of the endometrium in postmenopausal women. METHOD This study included 58 Japanese patients who had undergone hysterectomy at the University Hospital of Occupational and Environmental Health, Japan. Before surgery, nine patients had received 17β-estradiol (E2), 0.72 mg transdermally for 2-8 weeks (E2 group); 16 patients had received an Estra-1,3,5(10)-triene-3,16α, 17β-triol (E3) vaginal tablet 0.5 mg per month five times (E3 group); and 19 patients had received 17β-estradiol, 0.62 mg, and norethindrone acetate (P), 2.70 mg for 3-16 weeks (E2 + P group). Fourteen patients received no HRT (control group). We examined uterine tissue specimens immunohistochemically for CD45+, CD3+, CD4+, CD8+, CD20+, CD56+, and Ki67 antigen-positive cells. RESULTS The numbers of CD56 + cells were significantly increased in the E2 group compared with all other groups (E2 vs. E3: 7.0 vs. 0.75, p = 0.017; E2 vs. E2 + P: 7.0 vs. 0.58, p = 0.009; E2 vs. CONTROL 7.0 vs. 0.43, p = 0.010). The numbers of CD3+ cells were significantly increased in the E2 group compared with the control group (149.3 vs. 42.6, p = 0.008). CONCLUSION 17β-Estradiol induced the proliferation of endometrial uterine natural killer cells (CD56+) in postmenopausal women.
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Affiliation(s)
- T Sho
- a Department of Obstetrics and Gynecology , University of Occupational and Environmental Health, School of Medicine , Kitakyushu , Japan
| | - T Hachisuga
- a Department of Obstetrics and Gynecology , University of Occupational and Environmental Health, School of Medicine , Kitakyushu , Japan
| | - C Koi
- a Department of Obstetrics and Gynecology , University of Occupational and Environmental Health, School of Medicine , Kitakyushu , Japan
| | - T Kurita
- a Department of Obstetrics and Gynecology , University of Occupational and Environmental Health, School of Medicine , Kitakyushu , Japan
| | - S Kagami
- a Department of Obstetrics and Gynecology , University of Occupational and Environmental Health, School of Medicine , Kitakyushu , Japan
| | - T Kawagoe
- a Department of Obstetrics and Gynecology , University of Occupational and Environmental Health, School of Medicine , Kitakyushu , Japan
| | - Y Matsuura
- a Department of Obstetrics and Gynecology , University of Occupational and Environmental Health, School of Medicine , Kitakyushu , Japan
| | - K Yoshimura
- b Department of Obstetrics and Gynecology , Wakamatsu Hospital of the University of Occupational and Environmental Health , Kitakyushu , Japan
| | - M Hisaoka
- c Department of Pathology and Oncology , University of Occupational and Environmental Health, School of Medicine , Kitakyushu , Japan
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Ozawa M, Tanaka F, Segawa T, Takahashi T, Matsuura Y, Sakai T, Nishiyama O, Onoda T, Nakamura M. P6255Temporal trends of incidence and clinical features of acute myocardial infarction in a Japanese rural area from 2006 to 2014. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p6255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- M. Ozawa
- Iwate Medical University, Morioka, Japan
| | - F. Tanaka
- Iwate Medical University, Morioka, Japan
| | - T. Segawa
- Iwate Medical University, Morioka, Japan
| | | | | | - T. Sakai
- Iwate Prefecture Ninohe Hospital, Cardiology, Ninohe, Japan
| | - O. Nishiyama
- Iwate Prefecture Ninohe Hospital, Cardiology, Ninohe, Japan
| | - T. Onoda
- Iwate Medical University, Morioka, Japan
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Shimokawa Y, Matsuura Y, Hirano T, Sakai K. Gas viscosity measurement with diamagnetic-levitation viscometer based on electromagnetically spinning system. Rev Sci Instrum 2016; 87:125105. [PMID: 28040965 DOI: 10.1063/1.4968026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Utilizing a graphite-disk probe attached with a thin aluminum disk, we have developed a friction-free viscosity measurement system. The probe is levitated above a NdFeB magnet because of diamagnetic effect and rotated by an electromagnetically induced torque. The probe is absolutely free form mechanical friction, and therefore, the accurate measurements of the viscosity of gases can be achieved. To demonstrate the accuracy and sensitivity of our method, we measured the viscosity of 8 kinds of gases and its temperature change from 278 K to 318 K, and we confirmed a good agreement between the obtained values and literature values. This paper demonstrates that our method has the ability to measure the fluid viscosity in the order of μPa ⋅ s.
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Affiliation(s)
- Y Shimokawa
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Y Matsuura
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - T Hirano
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - K Sakai
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
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Matsuura Y, Iwamaru Y, Masujin K, Imamura M, Mohri S, Yokoyama T, Okada H. Corrigendum to “Distribution of Abnormal Prion Protein in a Sheep affected with L-type Bovine Spongiform Encephalopathy” [Journal of Comparative Pathology, 149, 113–118]. J Comp Pathol 2014. [DOI: 10.1016/j.jcpa.2014.02.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Uehara H, Matsuura Y, Nakao M, Mun M, Nakagawa K, Okumura S. P-144 * PROGNOSTIC SIGNIFICANCE OF CLINICAL/PATHOLOGICAL STAGE IA NON-SMALL-CELL LUNG CANCER. Interact Cardiovasc Thorac Surg 2014. [DOI: 10.1093/icvts/ivu167.144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Mezaki Y, Katsuya Y, Kubota M, Matsuura Y. Crystallization and Structural Analysis of Intact Maltotetraose-forming Exo-amylase from Pseudomonas stutzeri. Biosci Biotechnol Biochem 2014; 65:222-5. [PMID: 11272837 DOI: 10.1271/bbb.65.222] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The intact maltotetraose-forming exo-amylase from Pseudomonas stutzeri (G4-1), which has a raw starch binding domain, has been crystallized. The structure was identified (PDB entry 1GCY) by the molecular replacement method using the structure of its catalytic domain (G4-2). The result showed that the raw starch binding domain is in a disordered state, the corresponding electron densities being almost invisible. Superposition of these two enzyme forms showed evidence for the possible location of the raw starch binding domain (SBD). This crystal is a novel case, in that it forms a regular lattice incorporating flexibly bound SBD in the channel of crystal packing of the catalytic domains.
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Affiliation(s)
- Y Mezaki
- Hyogo Prefectural Institute of Industrial Research, Kobe, Japan.
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Li C, Rishad KPM, Horak P, Matsuura Y, Faccio D. Spectral broadening and temporal compression of ∼ 100 fs pulses in air-filled hollow core capillary fibers. Opt Express 2014; 22:1143-1151. [PMID: 24515074 DOI: 10.1364/oe.22.001143] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We experimentally study the spectral broadening of intense, ∼ 100 femtosecond laser pulses at 785 nm coupled into different kinds of hollow core capillary fibers, all filled with air at ambient pressure. Differently from observations in other gases, the spectra are broadened with a strong red-shift due to highly efficient intrapulse Raman scattering. Numerical simulations show that such spectra can be explained only by increasing the Raman fraction of the third order nonlinearity close to 100%. Experimentally, these broadened and red-shifted pulses do not generally allow for straightforward compression using, for example, standard chirped mirrors. However, using special hollow fibers that are internally coated with silver and polymer we obtain pulse durations in the sub-20 fs regime with energies up to 300 μJ.
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Kurita T, Nakajima K, Koi C, Matsuura Y, Hachisuga T. Management of a primary retroperitoneal mucinous cystadenocarcinoma: case report. EUR J GYNAECOL ONCOL 2014; 35:163-166. [PMID: 24772920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
PURPOSE To review the treatment of primary retroperitoneal mucinous cystadenocarcinoma (PRMC). CASE REPORT A 30-year-old woman had a large retroperitoneal mucinous adenocarcinoma treated with conservative laparoscopic surgery. Two years later, she was found to have bilateral ovarian cysts at the time of cesarean section. Since cystectomies revealed mucinous adenocarcinoma, she underwent complete surgical staging and adjuvant chemotherapy at this time. CONCLUSION A rare case of similar cancer in the ovary following treatment for PRMC was described. It is unclear whether the prognosis is improved by oophorectomy. Further cases and long-term follow-up are necessary.
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Iwakiri T, Matsuura Y, Yamashita A, Uezono S, Hisanaga S, Tokura T, Kitamura K, Asada Y, Fujimoto S. Serum C-reactive protein reflects the proportions of cellular crescent formation and glomerulosclerosis in patients with microscopic polyangiitis. Presse Med 2013. [DOI: 10.1016/j.lpm.2013.02.195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Matsuura Y, Iwamaru Y, Masujin K, Imamura M, Mohri S, Yokoyama T, Okada H. Distribution of abnormal prion protein in a sheep affected with L-type bovine spongiform encephalopathy. J Comp Pathol 2012; 149:113-8. [PMID: 23273583 DOI: 10.1016/j.jcpa.2012.11.231] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Revised: 09/10/2012] [Accepted: 11/07/2012] [Indexed: 11/27/2022]
Abstract
To investigate the topographical distribution and patterns of deposition of immunolabelled abnormal prion protein (PrP(Sc)), interspecies transmission of atypical L-type bovine spongiform encephalopathy (BSE) to Cheviot ewes (ARQ/ARQ genotype) was performed. L-type BSE was successfully transmitted via the intracerebral route to a ewe, with an incubation period of 1,562 days. Minimal vacuolar change was detected in the basal ganglia, thalamus and brainstem, and PrP(Sc) accumulated throughout the brain. The L-type BSE-affected sheep was characterized by conspicuous fine particulate deposits in the neuropil, particulate and/or granular intraneuronal and intraglial deposits, and the absence of PrP(Sc) plaques or stellate deposits. In addition, immunohistochemical and western blot analyses revealed that PrP(Sc) accumulation was present in peripheral nervous tissues (including the trigeminal ganglia and dorsal root ganglion) and adrenal glands, but was absent in lymphoid tissues. These results suggest that L-type BSE has distinct and distinguishable characteristics as well as PrP(Sc) tissue tropism in sheep.
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Affiliation(s)
- Y Matsuura
- Prion Disease Research Center, National Institute of Animal Health, 3-1-5 Kan-nondai, Tsukuba, Ibaraki 305-0856, Japan
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Daga H, Okada H, Taira K, Tokunaga S, Takeda K, Miyamoto N, Hattori M, Tamiya M, Kobayashi M, Okamoto N, Sasada S, Suzuki H, Morishita N, Matsuura Y, Hirashima T. Periodic Measurement of N-Telopeptides of Type I Collogen in Serum (SNTX) for Early Diagnosis of Bone Metastasis in Patients with Lung Cancer. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)32494-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Kagami S, Kurita T, Kawagoe T, Toki N, Matsuura Y, Hachisuga T, Matsuyama A, Hashimoto H, Izumi H, Kohno K. Prognostic significance of BAF57 expression in patients with endometrial carcinoma. Histol Histopathol 2012; 27:593-9. [PMID: 22419023 DOI: 10.14670/hh-27.593] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This study was conducted to elucidate the prognostic significance of BAF57 in patients with endometrial carcinoma. We investigated the relationship between the immunohistochemical expression of BAF57 and various clinicopathological variables in 111 endometrial carcinomas. Both univariate and multivariate regression analyses were performed. The correlations between the BAF57 expression and the other variables including estrogen receptor (ER) and p53 were examined. The high nuclear BAF57 expression was detected in 42 (37.8%) endometrial carcinomas, and 69 (62.2%) endometrial carcinomas were defined as having low nuclear BAF57 expression. The BAF57 expression was significantly associated with the surgical stage, grade of the tumor, myometrial invasion, lympho-vascular space invasion (LVSI) and lymph node metastasis. The 10-year overall survival rates of patients with low and high BAF57 expression were 96.9% and 58.2%, respectively (p<0.001). A multivariate analysis identified BAF57 expression as an independent prognostic factor. The BAF57 expression was significantly correlated with p53 expression (r=0.312, P=0.001), but was not correlated with ER expression (r= -0.141, P=0.14). The high BAF57 expression is an independent marker of poor prognosis of the patients in endometrial carcinomas. The inhibition of BAF57 activity may be one of the candidates for endometrial cancer therapy, especially therapy for aggressive tumors showing overexpression of p53.
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Affiliation(s)
- S Kagami
- Departmentsof Obstetrics, University of Occupational and Environmental Health School of Medicine, Yahatanishi-ku, Kitakyushu, Japan
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Takada H, Shimizu Y, Matsuura Y, Shiomi T, Miyao M. Non-linear analysis of stabilograms with alcoholic intake. Annu Int Conf IEEE Eng Med Biol Soc 2012; 2012:4208-4211. [PMID: 23366856 DOI: 10.1109/embc.2012.6346895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Equilibrium function in the cerebellum (vestibulo-cerebellar system) can deteriorate under the influence of alcohol. In the Romberg posture, the center of gravity, which was measured every 50 ms by stabilometry, appeared to shift with alcohol ingestion. In the previous study, a locus in the center of gravity (stabilogram) was converted to values of statistical indices such as area of sway, total locus length, and locus length per unit area, although these indices could not always distinguish between the statokinesigrams sampled from seven healthy young males in sober and intoxicated states. This measurement was made with an AMTI force plate. In this study, "translation error" was estimated in a d-dimensional embedding space in order to compare statokinesigrams recorded before and after the ingestion of doubly diluted brandy in 30 s (1 ≤ d ≤ 10). We succeeded in validating a stochastic differential equation as a mathematical model of the body sway. The randomness in the model was preserved after alcohol intake and significantly increased in the medial/lateral direction. Visual information referred by the postural control system when standing might be interfered by the effects of intoxication, which was regarded as disturbance. This method is considered to be useful to diagnose the disorders of the vestibulocerebellar system.
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Affiliation(s)
- H Takada
- Graduate School of Engineering, University of Fukui, 3-9-1 Bunkyo Fukui-City, Fukui, 910-8507 Japan.
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Okada H, Iwamaru Y, Kakizaki M, Masujin K, Imamura M, Fukuda S, Matsuura Y, Shimizu Y, Kasai K, Mohri S, Yokoyama T. Properties of L-type bovine spongiform encephalopathy in intraspecies passages. Vet Pathol 2011; 49:819-23. [PMID: 22081134 DOI: 10.1177/0300985811427150] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The origin and transmission routes of atypical bovine spongiform encephalopathy (BSE) remain unclear. To assess whether the biological and biochemical characteristics of atypical L-type BSE detected in Japanese cattle (BSE/JP24) are conserved during serial passages within a single host, 3 calves were inoculated intracerebrally with a brain homogenate prepared from first-passaged BSE/JP24-affected cattle. Detailed immunohistochemical and neuropathologic analysis of the brains of second-passaged animals, which had developed the disease and survived for an average of 16 months after inoculation, revealed distribution of spongiform changes and disease-associated prion protein (PrP(Sc)) throughout the brain. Although immunolabeled PrP(Sc) obtained from brain tissue was characterized by the presence of PrP plaques and diffuse synaptic granular accumulations, no stellate-type deposits were detected. Western blot analysis suggested no obvious differences in PrP(Sc) molecular mass or glycoform pattern in the brains of first- and second-passaged cattle. These findings suggest failures to identify differences in mean incubation period and biochemical and neuropathologic properties of the BSE/JP24 prion between the first and second passages in cattle.
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Affiliation(s)
- H Okada
- Prion Disease Research Center, National Institute of Animal Health, 3-1-5 Kan-nondai, Tsukuba, Ibaraki 305-0856, Japan.
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Ohoyama H, Matsuura Y. Atomic alignment effect in the dissociative energy transfer reaction of metal carbonyls (Fe(CO)5, Ni(CO)4) with oriented Ar (3P2, M(J) = 2). J Phys Chem A 2011; 115:10888-93. [PMID: 21905731 DOI: 10.1021/jp206670w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The atomic alignment effect has been studied for the dissociative energy transfer reaction of metal carbonyls (Fe(CO)(5), Ni(CO)(4)) with the oriented Ar ((3)P(2), M(J) = 2). The emission intensity from the excited metal products (Fe*, Ni*) has been measured as a function of the atomic alignment in the collision frame. The selectivity of the atomic orbital alignment of Ar ((3)P(2), M(J) = 2) (rank 2 moment, a(2)) is found to be opposite for the two reaction systems; the Fe(CO)(5) reaction is favorable at the Π configuration (positive a(2)), while the Ni(CO)(4) reaction is favorable at the Σ configuration (negative a(2)). Moreover, a significant spin alignment effect (rank 4 moment, a(4)) is recognized only in the Ni(CO)(4) reaction. The atomic alignment effect turns out to be essentially different between the two reaction systems; the Fe(CO)(5) reaction is controlled by the configuration of the half-filled 3p atomic orbital of Ar ((3)P(2)) in the collision frame (L dependence), whereas the Ni(CO)(4) reaction is controlled by the configuration of the total angular moment J (including spin) of Ar ((3)P(2)) in the collision frame (J dependence). As the origin of J dependence observed only in the Ni(CO)(4) reaction, the correlation (and/or the interference) between two electron exchange processes via the electron rearrangements is proposed.
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Affiliation(s)
- H Ohoyama
- Department of Chemistry, Graduate School of Science, Osaka University Toyonaka, Osaka 560-0043, Japan.
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Saburi H, Naitow H, Yutani K, Sugahara M, Tanaka T, Matsuura Y, Ishikawa T, Kunishima N. Protein tectonics platform that facilitates synchrotron radiation life science. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311079347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Ohoyama H, Matsuura Y. Steric effect in the energy transfer reaction of oriented CO (a 3Π, v'=0, Ω=1 and 2) + NO (X 2Π) → NO (A 2Σ+, B 2Π) + CO (X 1Σ+). J Phys Chem A 2011; 115:8055-63. [PMID: 21671684 DOI: 10.1021/jp202781g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The oriented CO (a (3)Π, v' = 0, Ω = 1 and 2) beam has been prepared by using an electric hexapole and applied to the energy transfer reaction of CO (a (3)Π, v' = 0, Ω = 1 and 2) + NO (X (2)Π) → NO (A (2)Σ(+), B (2)Π) + CO (X (1)Σ(+)). The emission spectra of NO (A (2)Σ(+), B(2)Π) have been measured at three orientation configurations (C-end, O-end, random). The shape of the emission spectra (and/or the internal excitation of products) turns out to be insensitive to the molecular orientation. The vibrational distributions of NO (A (2)Σ(+), v' = 0-2) and NO (B (2)Π, v' = 0-2) are determined to be N(v'=0):N(v'=1):N(v'=2) = 1:0.40 ± 0.05:0.10 ± 0.05 and N(v'=0):N(v'=1):N(v'= 2) = 1:0.6 ± 0.1:0.7 ± 0.1, respectively, and the branching ratio γ/β [=NO (A (2)Σ(+))/NO (B (2)Π)] is estimated to be γ/β ∼ 0.3 ± 0.1 by means of spectral simulation. These vibrational distributions of NO (A, B) can be essentially attributed to the product-pair correlations between CO (X, v″) and NO (A (2)Σ(+), v' = 0-2), NO (B (2)Π, v' = 0-2) due to energetic restriction under the vibrational distribution of CO (X, v″) produced from the vertical transition of CO (a (3)Π, v' = 0) → CO (X, v″) in the course of energy transfer. The steric opacity function has been determined at two wavelength regions: 220 < λ < 290 nm [NO (A → X) is dominant]; 320 < λ < 400 nm [NO (B → X) is dominant]. For both channels NO (A (2)Σ(+), B(2)Π), a significant CO (a (3)Π) alignment effect is recognized; the largest reactivity at the sideways direction with the small reactivity at the molecular axis direction is observed. These CO (a (3)Π) alignment effects can be essentially attributed to the steric asymmetry on two sets of molecular orbital overlap, [CO (2π) + NO (6σ (2π))] and [CO (5σ) + NO (1π (2π))]. All experimental observations support the electron exchange mechanism that is operative through the formation of a weakly bound complex OCNO.
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Affiliation(s)
- H Ohoyama
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
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Motomura T, Taketomi A, Fukuhara T, Mano Y, Takeishi K, Toshima T, Harada N, Uchiyama H, Yoshizumi T, Soejima Y, Shirabe K, Matsuura Y, Maehara Y. The impact of IL28B genetic variants on recurrent hepatitis C in liver transplantation: significant lessons from a dual graft case. Am J Transplant 2011; 11:1325-9. [PMID: 21645259 DOI: 10.1111/j.1600-6143.2011.03537.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
IL28B genetic polymorphism is related to interferon-sensitivity in chronic hepatitis C, but the significance of grafts carrying different genotypes from recipients is still unclear in liver transplantation. A 51-year-old Japanese male carrying a minor genotype underwent dual liver transplantation for liver cirrhosis due to hepatitis C virus (HCV). The left lobe graft carried a major genotype, and the right a minor genotype. He achieved virological response during the course of pegylated-interferon and ribavirin therapy against recurrent hepatitis C for 2 years, but HCV relapsed immediately at the end of the therapy. Two years after antiviral therapy, liver biopsy was performed from each graft. The specimens showed A1F0 in the left lobe graft and A2F2 in the right. Moreover, quantitative polymerase chain reaction was performed using RNA extracted from each specimen to see there was no HCV RNA in the left lobe whereas there was in the right. This case provides clear evidence that IL28B genetic variants determine interferon sensitivity in recurrent hepatitis C following liver transplantation, which could result in new strategies for donor selection or for posttransplant antiviral therapy to HCV positive recipients.
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Affiliation(s)
- T Motomura
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Okada H, Tamiya M, Tokunaga S, Daga H, Taira K, Kobayashi S, Tanaka A, Miyamoto N, Hattori M, Kobayashi M, Okamoto N, Sasada S, Suzuki H, Morishita N, Matsuura Y, Hirashima T, Takeda K. Diagnosis of bone metastasis in patients with lung cancer using urinary and serum collagen type I telopeptide (NTx). J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e18044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Okajima M, Kokura S, Matsumoto T, Ishikawa T, Matsuyama R, Funaki J, Adachi S, Matsuura Y, Sakamoto N, Naito Y, Yosikawa T. Abstract 1810: The effects of adoptive T cell transfer on the population of regulatory T cells in the mouse colorectal cancer transplant model. Cancer Res 2011. [DOI: 10.1158/1538-7445.am2011-1810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background and Aim: Recent evidence has demonstrated that regulatory T cells (Tregs) mediated immunosuppression is one of the most crutial tumor immune-evasion mechanisms. We clinically demonstrated that the number of peripheral Tregs in the patients with variety of cancer which received ACT, which is non-specific CD3-LAK significantly decreased and that the clinical outcome of the patients of which peripheral Tregs decreased was better. ACT, which contains even only the non-specific lymphocytes might have the potential to not only directly kill malignant cells but also manipulate the population of Tregs in tumor bearing hosts in strong immunosuppressive states. The aim of this study is to investigate the effect of ACT which is composed of non-specific T lymphocytes on the population of Tregs in local tumor, draining lymph nodes and spleen in the mice colorectal cancer transplant model. We have also investigated the effect of activated T cells on the induction of Tregs from CD4+ T cells by IL-2 and TGF-β.
Materials and Methods: In vivo study: Male Balb/c mice were injected s.c. with colon26. The population of Treg in the tumor, the lymph node, and the spleen was analyzed after ACT(non-specific CD3-LAK) administration via a tail vein. In vitro study: The inducible system of Tregs was established. CD4+cells sorted from murine splenocytes were expanded for 72 hours in culture media containing IL-2 and TGFβ. LAK cells were co-cultured non-contactly with CD4+cells. Then we investigated the changes in the system after the co-culture. We also measured the concentration of IFN-γ in the culture solution to reveal the mechanism.
Results: The accumulation of Tregs in the draining LNs and tumor was significantly suppressed by ACT. The induction of Tregs in vitro was inhibited by co-culture with LAK cells. The concentration of IFN-γ in the culture solution increased in LAK+ group.Conclusions: We have demonstrated that ACT has the potential to reduce the number of Tregs in tumor and draining lymph nodes in the mouse colorectal cancer transplant model. As one of the mechanisms of this phenomenon, IFN-γ secreted from LAK cells might blockade the conversion of CD4+ cells into Tregs. These findings suggest a novel therapeutic position of ACT in variety of cancer immunotherapies.
Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 102nd Annual Meeting of the American Association for Cancer Research; 2011 Apr 2-6; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2011;71(8 Suppl):Abstract nr 1810. doi:10.1158/1538-7445.AM2011-1810
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Matsuyama T, Kokura S, Matsumoto T, Okajima M, Okajima M, Ishikawa T, Funaki J, Adachi S, Matsuura Y, Sakamoto N, Naito Y, Yosikawa T. Abstract 2704: A role of the ADCC in the antibody therapy for gastrointestinal carcinoma. Cancer Res 2011. [DOI: 10.1158/1538-7445.am2011-2704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
(Background and Aim) Both cetuximab and trastuzumab inhibit growth signal by binding to growth factor receptors, and also have an alternative function regarded as ADCC. In this study, we examined cetuximab-mediated ADCC against EGFR-positive colon cancer cells and trastuzumab-mediated ADCC against HER2-positive gastric cancer cells. Moreover, we investigated the new methods to enhance those ADCC activities.
(Materials and Methods) We used human gastric cancer cell lines (MKN1, MKN45) and colon cancer cells (HT-29), cetuximab and trastuzumab as an antibody which potentially had ADCC, and non-specific IgG1 antibody as a control. ADCC was measured by Europium release assay: First, we used peripheral blood mononuclear cells (PBMCs) from healthy volunteers as effector, and we prepared those cancer cell lines combined with those kinds of antibodies as target. Next, we used PBMCs activated by IL-2 instead of normal PBMCs. At same time, CD16, perforin, granzyneB on PBMCs were evaluated by Flow Cytometer and PCR. NK activity of PBMN and activated PBMC against for K562 cell and ADCC activity of PBMN and activated PBMC were evaluated.
(Results) Cetuximab and trastuzumab didn't kill cancer cells by themselves, but the cytotoxicity of PBMCs was increased when the target cells were treated with these antibodies in advance. This increase was further strengthened by activated PBMCs with IL-2. But IL-2 didn't enhance CD16 expression on PBMCs. Finally PBMC, which have high potential of NK activity shows high ADCC activity,
(Conclusion) These two antibody therapy shows ADCC in vitro, As a next step, we have to start in vivo study
Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 102nd Annual Meeting of the American Association for Cancer Research; 2011 Apr 2-6; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2011;71(8 Suppl):Abstract nr 2704. doi:10.1158/1538-7445.AM2011-2704
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Affiliation(s)
| | | | | | | | | | | | - Jun Funaki
- 1Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Satoko Adachi
- 1Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yuko Matsuura
- 1Kyoto Prefectural University of Medicine, Kyoto, Japan
| | | | - Yuji Naito
- 1Kyoto Prefectural University of Medicine, Kyoto, Japan
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Matsuura Y, Ohoyama H. Collision-Induced Harpooning Observed in the Excimer Formation in the Oriented NF3 + Oriented Kr*(3P2, MJ = 2) Reaction. J Phys Chem A 2011; 115:4583-91. [DOI: 10.1021/jp200979r] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Y. Matsuura
- Department of Chemistry, Graduate School of Science, Osaka University Toyonaka, Osaka 560-0043, Japan
| | - H. Ohoyama
- Department of Chemistry, Graduate School of Science, Osaka University Toyonaka, Osaka 560-0043, Japan
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