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Yamamoto TO, Fujita M, Gogami T, Harada TK, Hayakawa SH, Hosomi K, Ichikawa Y, Ishikawa Y, Kamada K, Kanauchi H, Koike T, Miwa K, Nagae T, Oura F, Takahashi T, Tamura H, Tanida K, Ukai M. X ray spectroscopy on 𝚵 − atoms (J-PARC E03, E07 and future). EPJ Web Conf 2022. [DOI: 10.1051/epjconf/202227103001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
X-ray spectroscopy of hadronic atoms is a powerful method to study strong interaction between hadrons and nuclei. At J-PARC, we have conducted two experiments, J-PARC E07 and E03, for hadronic atoms with a doubly strange hyperon, Ξ−, aiming at the world-first detection of their X-rays. The first measurement is performed as a byproduct of J-PARC E07 experiment with the hybrid emulsion technique. The second one, J-PARC E03, is a dedicated experiment for detection of Ξ− Fe atom X rays. The preliminary results and the present status of E07 and E03 are shown in this article. Future prospects of Ξ−-atomic X-ray spectroscopy are also discussed. A new measurement has been proposed for detecting Ξ− C atom X rays, where a novel Ξ− tracking method will be applied to realize an improved signal to noise ratio.
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Ebata K, Fujioka H, Fujita M, Gogami T, Harada TK, Hayakawa SH, Honda R, Ichikawa Y, Kamada K, Kobori T, Miwa K, Nagae T, Nanamura T, Negishi R, Oura F, Sakao T, Son C, Takahashi T, Takahashi H, Tamura H, Tokiyasu AO, Ukai M, Yamamoto TO. Preparation status of missing-mass spectroscopy for 𝚵 hypernuclei with S-2S magnetic spectrometer. EPJ Web Conf 2022. [DOI: 10.1051/epjconf/202227103008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
J-PARC E70 experiment measures the missing-mass of Ξ hypernuclei (12ΞBe) in Hadron Experimental Facility at J-PARC. We aim to reach the best missing-mass resolution of 2 MeV/c2 in FWHM with a new magnetic spectrometer S-2S. The high-resolution spectroscopy of Ξ hypernuclei will play an important role to understand the unknown ΞN interaction. The experiment will start at the beginning of 2023. This article presents the preparation status.
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Takahashi A, Kamada K, Kudoh T, Kudoh K, Takamaru N, Kurio N, Sugawara C, Miyamoto Y. Evaluation of anatomical references for locating the course of the posterior superior alveolar artery for dental implant surgery. Int J Oral Maxillofac Surg 2021; 51:257-262. [PMID: 34083086 DOI: 10.1016/j.ijom.2021.05.013] [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] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 03/25/2021] [Accepted: 05/12/2021] [Indexed: 10/21/2022]
Abstract
This retrospective cohort study aimed to identify the best anatomical reference for predicting the posterior superior alveolar artery (PSAA) location. Computed tomographic images of 90 maxillary sinuses were evaluated. We studied five references, including the alveolar crest, maxillary sinus floor, zygomatoalveolar crest, hard palate and soft palate, and measured the distances between them and the PSAA. Variations in the distance were evaluated by the standard deviation and coefficient of variation (CV). The zygomatoalveolar crest was an unstable reference, owing to its high standard deviation and CV. The smallest CV was for the distance between the alveolar crest and PSAA, although the distance was smaller in edentulous jaws than dentulous jaws. The distance between the sinus floor and PSAA was larger in male and edentulous patients. The PSAA was detected in 40.0%, 44.4%, 54.4% and 56.7% of the sinus walls at the first and second premolar and the first and second molar positions, respectively. At these tooth positions, the respective heights above the hard palate were 11.2 ± 4.9, 8.2 ± 4.9, 6.2 ± 2.8 and 8.1 ± 2.9 mm. The hard palate was the most stable reference for predicting the location of the PSAA, irrespective of sex, age and dentition.
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Affiliation(s)
- A Takahashi
- Department of Oral Surgery, Oral Sciences, Clinical Dentistry, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan.
| | - K Kamada
- Department of Oral Surgery, Oral Sciences, Clinical Dentistry, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - T Kudoh
- Department of Oral Surgery, Oral Sciences, Clinical Dentistry, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - K Kudoh
- Department of Oral Surgery, Oral Sciences, Clinical Dentistry, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - N Takamaru
- Department of Oral Surgery, Oral Sciences, Clinical Dentistry, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - N Kurio
- Department of Oral Surgery, Oral Sciences, Clinical Dentistry, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - C Sugawara
- Tokushima Prefectural Central Hospital, Tokushima, Japan
| | - Y Miyamoto
- Department of Oral Surgery, Oral Sciences, Clinical Dentistry, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
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Hagiwara T, Kamada K, Namura N. THU0099 THE TIME REQUIRED TO ESCALATE THE DOSAGE OF METHOTREXATE TO THERAPEAUTIC LEVELS AFFECTS THE TREATMENT SUCCESS ACHIEVED DURING PHASE I OF THE TREATMENT ALGORITHM FOR RHEUMATOID ARTHRITIS RECOMMENDED BY THE EUROPEAN LEAGUE AGAINST RHEUMATISM. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
Abstract
Background:In the treatment of rheumatoid arthritis (RA), methotrexate (MTX) monotherapy is undoubtedly the most cost-effective therapy available. However, no clear evidence exists for the adopted method of MTX usage, except for guidelines that have been formulated using empirical knowledge.Objectives:We aimed to retrospectively evaluate the treatment method used to administer MTX in order to identify factors influencing the success rate of MTX treatment in phase I of the European League Against Rheumatism (EULAR) recommendation in the treatment algorithm of RA.Methods:A total of 520 RA patients were considered for inclusion in this study, of whom 183 were eligible as they had been treated with MTX monotherapy from 2013 to 2018. The exclusion criteria included the following: unknown MTX prescription details (200 cases), deviation from the treatment algorithm i.e. use of a combination of conventional synthetic disease-modifying antirheumatic drugs (csDMARDs) before MTX therapy (4 cases), and a long duration of MTX escalation that deviated from the treat-to-target concept (133 cases).Patients who received csDMARD monotherapy (including switching between csDMARDs) prior to MTX monotherapy were not excluded.The primary outcome was failed MTX monotherapy with transition to phase II.The escalation time to the required maximum therapeutic dose of MTX and the lower limit of the required maintenance therapeutic dose that resulted in successful MTX monotherapy was determined using the receiver operating characteristic (ROC) curve. Accordingly, previous results obtained from ROC curve analyses were categorized into two groups for regression analysis: patients who tolerated MTX monotherapy and those who failed MTX monotherapy.We performed a regression analysis on the background factors observed during their first visit to our department and two previously identified factors. The background factors included prognostically unfavourable factors related to joint destruction despite RA treatment (i.e. rheumatoid factor [RF] levels, anti-citrullinated peptide antibody [ACPA] levels, acute phase reactant levels, swollen joint counts, joint damage, and disease activity).Results:The background factors that were statistically different were age at onset, RF levels, ACPA levels, current dose and continuity of MTX therapy, glucocorticoid (GC) use, and time until first DMARD use. After this analysis, we determined to exclude GC use from subsequent analyses as it was found to be statistically different between age groups.Using the ROC analysis, we found that the escalation time to the maximum dose of MTX was 2.07 weeks. Further, logistic regression analysis was used to analyse each of the previously reported statistically significant factors. Statistical differences were observed in the age at onset and the escalation time of initial MTX induction therapy.We also performed a backward stepwise logistic regression analysis on the previous two factors and conventional risk factors related to joint destruction with RA treatment. Statistical difference was observed in the escalation time of initial MTX induction therapy.Furthermore, propensity score matching was performed by analysing the previously mentioned influencing factors and prognostically unfavourable factors of joint destruction using a backward stepwise logistic regression analysis. We identified statistical difference in the escalation time of MTX induction therapy (odds ratio: 1.957 [95% confidential interval: 1.036-3.697], p=.039).Conclusion:These results suggest that rapid escalation to the required MTX therapeutic dose, within 2.07 weeks, during initial RA treatment can shorten the time required to achieve the treatment target. By doing this, RA patients on MTX therapy in phase I may achieve a greater treatment responsive. Thus, the short escalation time is an important factor influencing successful MTX monotherapy in the RA treatment algorithm.Disclosure of Interests:None declared
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Murakami K, Kamada K. Abstract No. 539 Treatment outcomes in transarterial chemoembolization refractory hepatocellular carcinoma patients converted to lenvatinib therapy. J Vasc Interv Radiol 2020. [DOI: 10.1016/j.jvir.2019.12.600] [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] Open
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Kurosawa S, Shishido T, Sugawara T, Yubuta K, Horiai T, Jarý V, Yamaji A, Yoshino M, Yokota Y, Shoji Y, Kamada K, Yoshikawa A, Pejchal J, Nikl M. Scintillation properties of Y-Admixed Gd2Si2O7 scintillator. RADIAT MEAS 2019. [DOI: 10.1016/j.radmeas.2019.106123] [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: 10/26/2022]
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Yoshida K, Saku K, Kamada K, Abe K, Akashi T, Kishi T, Tsutsui H, Sunagawa K. 1205Vagal nerve stimulation restores autonomic balance, super-normalizes right ventricular function and prevents the worsening of right heart failure in chronic pulmonary arterial banding model rats. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.1205] [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: 11/13/2022] Open
Affiliation(s)
- K Yoshida
- Kyushu University Graduate School of Medical Sciences, Cardiovascular Medicine, Fukuoka, Japan
| | - K Saku
- Kyushu University, Therapeutic Regulation of Cardiovascular Homeostasis, Center for Disruptive Cardiovascular Medicine, Fukuoka, Japan
| | - K Kamada
- Kyushu University Graduate School of Medical Sciences, Cardiovascular Medicine, Fukuoka, Japan
| | - K Abe
- Kyushu University Graduate School of Medical Sciences, Cardiovascular Medicine, Fukuoka, Japan
| | - T Akashi
- Kyushu University, Therapeutic Regulation of Cardiovascular Homeostasis, Center for Disruptive Cardiovascular Medicine, Fukuoka, Japan
| | - T Kishi
- Kyushu University, Therapeutic Regulation of Cardiovascular Homeostasis, Center for Disruptive Cardiovascular Medicine, Fukuoka, Japan
| | - H Tsutsui
- Kyushu University Graduate School of Medical Sciences, Cardiovascular Medicine, Fukuoka, Japan
| | - K Sunagawa
- Kyushu University, Therapeutic Regulation of Cardiovascular Homeostasis, Center for Disruptive Cardiovascular Medicine, Fukuoka, Japan
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Mannoji H, Saku K, Nishikawa T, Tohyama T, Kamada K, Abe K, Sunagawa G, Kishi T, Tsutsui H, Sunagawa K. 3031Noninvasive identification of baroreflex function from continuous arterial pressure waveform and its clinical application. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.3031] [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: 11/12/2022] Open
Affiliation(s)
- H Mannoji
- Kyushu University Graduate School of Medical Sciences, cardiology, Fukuoka, Japan
| | - K Saku
- Kyushu University, Center for Disruptive Cardiovascular Medicine, Fukuoka, Japan
| | - T Nishikawa
- Kyushu University Graduate School of Medical Sciences, cardiology, Fukuoka, Japan
| | - T Tohyama
- Kyushu University Graduate School of Medical Sciences, cardiology, Fukuoka, Japan
| | - K Kamada
- Kyushu University Graduate School of Medical Sciences, cardiology, Fukuoka, Japan
| | - K Abe
- Kyushu University Graduate School of Medical Sciences, anesthesiology, Fukuoka, Japan
| | - G Sunagawa
- Kyushu University Graduate School of Medical Sciences, cardiology, Fukuoka, Japan
| | - T Kishi
- Kyushu University, Center for Disruptive Cardiovascular Medicine, Fukuoka, Japan
| | - H Tsutsui
- Kyushu University Graduate School of Medical Sciences, cardiology, Fukuoka, Japan
| | - K Sunagawa
- Kyushu University, Center for Disruptive Cardiovascular Medicine, Fukuoka, Japan
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Abe K, Saku K, Mannoji H, Sunagawa G, Kamada K, Kishi T, Hoka S, Sunagawa K, Tsutsui H. P912The presence of baroreflex failure augments the variability of left atrial pressure and triggers acute pulmonary edema in a rat with chronic heart failure. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy564.p912] [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: 11/14/2022] Open
Affiliation(s)
- K Abe
- Kyushu University Graduate School of Medical Sciences, Department of Anesthesiology and Critical Care Medicine, Fukuoka, Japan
| | - K Saku
- Kyushu University, Center for Disruptive Cardiovascular Medicine, Fukuoka, Japan
| | - H Mannoji
- Kyushu University Graduate School of Medical Sciences, Department of Cardiovascular Medicine, Fukuoka, Japan
| | - G Sunagawa
- Kyushu University Graduate School of Medical Sciences, Department of Cardiovascular Medicine, Fukuoka, Japan
| | - K Kamada
- Kyushu University Graduate School of Medical Sciences, Department of Cardiovascular Medicine, Fukuoka, Japan
| | - T Kishi
- Kyushu University, Center for Disruptive Cardiovascular Medicine, Fukuoka, Japan
| | - S Hoka
- Kyushu University Graduate School of Medical Sciences, Department of Anesthesiology and Critical Care Medicine, Fukuoka, Japan
| | - K Sunagawa
- Kyushu University, Center for Disruptive Cardiovascular Medicine, Fukuoka, Japan
| | - H Tsutsui
- Kyushu University Graduate School of Medical Sciences, Department of Cardiovascular Medicine, Fukuoka, Japan
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Yokoi S, Tsugita A, Kamada K. Characterization of Major Proteins and Peptides in Beer. Journal of the American Society of Brewing Chemists 2018. [DOI: 10.1094/asbcj-46-0099] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- S. Yokoi
- Department of Chemistry, Science University of Tokyo, Noda, Japan 278
| | - A. Tsugita
- Department of Chemistry, Science University of Tokyo, Noda, Japan 278
| | - K. Kamada
- Research & Development Laboratories, Sapporo Breweries Ltd., Yaizu, Shizuoka, Japan 425
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Kapeller C, Ogawa H, Schalk G, Kunii N, Coon WG, Scharinger J, Guger C, Kamada K. Real-time detection and discrimination of visual perception using electrocorticographic signals. J Neural Eng 2018; 15:036001. [PMID: 29359711 DOI: 10.1088/1741-2552/aaa9f6] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
OBJECTIVE Several neuroimaging studies have demonstrated that the ventral temporal cortex contains specialized regions that process visual stimuli. This study investigated the spatial and temporal dynamics of electrocorticographic (ECoG) responses to different types and colors of visual stimulation that were presented to four human participants, and demonstrated a real-time decoder that detects and discriminates responses to untrained natural images. APPROACH ECoG signals from the participants were recorded while they were shown colored and greyscale versions of seven types of visual stimuli (images of faces, objects, bodies, line drawings, digits, and kanji and hiragana characters), resulting in 14 classes for discrimination (experiment I). Additionally, a real-time system asynchronously classified ECoG responses to faces, kanji and black screens presented via a monitor (experiment II), or to natural scenes (i.e. the face of an experimenter, natural images of faces and kanji, and a mirror) (experiment III). Outcome measures in all experiments included the discrimination performance across types based on broadband γ activity. MAIN RESULTS Experiment I demonstrated an offline classification accuracy of 72.9% when discriminating among the seven types (without color separation). Further discrimination of grey versus colored images reached an accuracy of 67.1%. Discriminating all colors and types (14 classes) yielded an accuracy of 52.1%. In experiment II and III, the real-time decoder correctly detected 73.7% responses to face, kanji and black computer stimuli and 74.8% responses to presented natural scenes. SIGNIFICANCE Seven different types and their color information (either grey or color) could be detected and discriminated using broadband γ activity. Discrimination performance maximized for combined spatial-temporal information. The discrimination of stimulus color information provided the first ECoG-based evidence for color-related population-level cortical broadband γ responses in humans. Stimulus categories can be detected by their ECoG responses in real time within 500 ms with respect to stimulus onset.
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Affiliation(s)
- C Kapeller
- Guger Technologies OG, Graz, Austria. Department of Computational Perception, Johannes Kepler University, Linz, Austria
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Yoshida K, Saku K, Kamada K, Abe K, Tanaka M, Akashi T, Kishi T, Sunagawa K, Tsutsui H. 5023Vagal nerve stimulation ameliorates severe pulmonary arterial hypertension via anti-inflammatory effects in rats. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.5023] [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: 11/14/2022] Open
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Prueckl R, Kapeller C, Gruenwald J, Ogawa H, Kamada K, Korostenskaja M, Swift J, Scharinger J, Cho W, Edlinger G, Guger C. Passive functional mapping guides electrical cortical stimulation for efficient determination of eloquent cortex in epilepsy patients. Annu Int Conf IEEE Eng Med Biol Soc 2017; 2017:4163-4166. [PMID: 29060814 DOI: 10.1109/embc.2017.8037773] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Electrical cortical stimulation (ECS) is often used in presurgical evaluation procedures for patients suffering from pharmacoresistant epilepsy. Real-time functional mapping (RTFM) is an alternative brain mapping methodology that can accompany traditional functional mapping approaches like ECS. In this paper, we present a combined RTFM/ECS system that aims to exploit the common ground and the advantages of the two procedures for improved time/effort effectiveness, patients' experience and safety. Using the RTFM and ECS data from four patients who suffer epilepsy, we demonstrate that the RTFM-guided ECS procedure hypothetically reduces the number of electrical stimulations necessary for eloquent cortex detection by 40%.
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Kapeller C, Kamada K, Ogawa H, Prueckl R, Otal B, Guger C. Cortico-cortical potentials mapping of the face recognition network. Brain Stimul 2017. [DOI: 10.1016/j.brs.2017.01.495] [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: 10/20/2022] Open
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Kapeller C, Gergondet P, Kamada K, Ogawa H, Takeuchi F, Ortner R, Pruckl R, Kheddar A, Scharinger J, Guger C. Online control of a humanoid robot through hand movement imagination using CSP and ECoG based features. Annu Int Conf IEEE Eng Med Biol Soc 2016; 2015:1765-8. [PMID: 26736620 DOI: 10.1109/embc.2015.7318720] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Intention recognition through decoding brain activity could lead to a powerful and independent Brain-Computer-Interface (BCI) allowing for intuitive control of devices like robots. A common strategy for realizing such a system is the motor imagery (MI) BCI using electroencephalography (EEG). Changing to invasive recordings like electrocorticography (ECoG) allows extracting very robust features and easy introduction of an idle state, which might simplify the mental task and allow the subject to focus on the environment. Especially for multi-channel recordings like ECoG, common spatial patterns (CSP) provide a powerful tool for feature optimization and dimensionality reduction. This work focuses on an invasive and independent MI BCI that allows triggering from an idle state, and therefore facilitates tele-operation of a humanoid robot. The task was to lift a can with the robot's hand. One subject participated and reached 95.4 % mean online accuracy after six runs of 40 trials. To our knowledge, this is the first online experiment with a MI BCI using CSPs from ECoG signals.
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Mizuki S, Kushimoto K, Yamasaki H, Yoshida K, Oryoji K, Kamada K, Yokota E. THU0486 Persistence with anti-Osteoporotic Therapy in Patients with Rheumatic Disease. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.4191] [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: 11/03/2022]
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Prueckl R, Kapeller C, Kamada K, Takeuchi F, Ogawa H, Scharinger J, Guger C. Distinction of individual finger responses in somatosensory cortex using ECoG high-gamma activation mapping. Annu Int Conf IEEE Eng Med Biol Soc 2016; 2015:5760-3. [PMID: 26737601 DOI: 10.1109/embc.2015.7319701] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This study demonstrates the feasibility of high-gamma activity mapping for localization of somatosensory finger areas in the human brain. Identification of functional brain regions is important in surgical planning, such as for resections of epileptic foci or brain tumors. The mapping procedure is done using electrocorticography (ECoG), an invasive technique in which electrical brain signals are acquired from the cortical surface. Two epilepsy patients with implanted electrode grids participated in the study. Data were collected during a vibrotactile finger stimulation paradigm and showed significant cortical activation (p <; 0.001) in the high-gamma range over the contralateral somatosensory cortex. The results are consistent with previous studies that used fMRI in test subjects without implanted electrodes. Therefore, the results suggest that localizing the cortical representations of the fingers in clinical practice using ECoG is feasible, even without the patient's active participation.
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Kapeller C, Schneider C, Kamada K, Ogawa H, Kunii N, Ortner R, Pruckl R, Guger C. Single trial detection of hand poses in human ECoG using CSP based feature extraction. Annu Int Conf IEEE Eng Med Biol Soc 2015; 2014:4599-602. [PMID: 25571016 DOI: 10.1109/embc.2014.6944648] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Decoding brain activity of corresponding highlevel tasks may lead to an independent and intuitively controlled Brain-Computer Interface (BCI). Most of today's BCI research focuses on analyzing the electroencephalogram (EEG) which provides only limited spatial and temporal resolution. Derived electrocorticographic (ECoG) signals allow the investigation of spatially highly focused task-related activation within the high-gamma frequency band, making the discrimination of individual finger movements or complex grasping tasks possible. Common spatial patterns (CSP) are commonly used for BCI systems and provide a powerful tool for feature optimization and dimensionality reduction. This work focused on the discrimination of (i) three complex hand movements, as well as (ii) hand movement and idle state. Two subjects S1 and S2 performed single `open', `peace' and `fist' hand poses in multiple trials. Signals in the high-gamma frequency range between 100 and 500 Hz were spatially filtered based on a CSP algorithm for (i) and (ii). Additionally, a manual feature selection approach was tested for (i). A multi-class linear discriminant analysis (LDA) showed for (i) an error rate of 13.89 % / 7.22 % and 18.42 % / 1.17 % for S1 and S2 using manually / CSP selected features, where for (ii) a two class LDA lead to a classification error of 13.39 % and 2.33 % for S1 and S2, respectively.
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Kamada K, Ogawa H, Kapeller C, Prueckl R, Guger C. Rapid and low-invasive functional brain mapping by realtime visualization of high gamma activity for awake craniotomy. Annu Int Conf IEEE Eng Med Biol Soc 2015; 2014:6802-5. [PMID: 25571558 DOI: 10.1109/embc.2014.6945190] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
For neurosurgery with an awake craniotomy, the critical issue is to set aside enough time to identify eloquent cortices by electrocortical stimulation (ECS). High gamma activity (HGA) ranging between 80 and 120 Hz on electrocorticogram (ECoG) is assumed to reflect localized cortical processing. In this report, we used realtime HGA mapping and functional magnetic resonance imaging (fMRI) for rapid and reliable identification of motor and language functions. Three patients with intra-axial tumors in their dominant hemisphere underwent preoperative fMRI and lesion resection with an awake craniotomy. All patients showed significant fMRI activation evoked by motor and language tasks. After the craniotomy, we recorded ECoG activity by placing subdural grids directly on the exposed brain surface. Each patient performed motor and language tasks and demonstrated realtime HGA dynamics in hand motor areas and parts of the inferior frontal gyrus. Sensitivity and specificity of HGA mapping were 100% compared to ECS mapping in the frontal lobe, which suggested HGA mapping precisely indicated eloquent cortices. The investigation times of HGA mapping was significantly shorter than that of ECS mapping. Specificities of the motor and language-fMRI, however, did not reach 85%. The results of HGA mapping was mostly consistent with those of ECS mapping, although fMRI tended to overestimate functional areas. This novel technique enables rapid and accurate functional mapping.
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Kapeller C, Kamada K, Ogawa H, Prückl R, Kunii N, Schnürer A, Guger C. P87. Expressive and receptive language mapping using ECoG and ECS. Clin Neurophysiol 2015. [DOI: 10.1016/j.clinph.2015.04.237] [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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Mizuki S, Higashioka K, Yoshida K, Oryoji K, Kamada K, Yokota E. AB0314 Association of Rheumatoid Factor and Anti-Citrullinated Protein Antibody Status with Orthopedic Surgeries for Rheumatoid Arthritis Patients. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.5297] [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: 11/04/2022]
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Mizuki S, Kashiwado Y, Yoshida K, Oryoji K, Kamada K, Yokota E. AB0291 Association between Pentosidine, an Advanced Glycation End-Product, and Disease Activity in Patients with Untreated Rheumatoid Arthritis. A Preliminary Report. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.4500] [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: 11/04/2022]
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Kapeller C, Prueckl R, Kamada K, Ogawa H, Kunii N, Kawai K, Schalk G, Guger C. P18: Functional mapping of expressive language area with ECoG and ECS. Clin Neurophysiol 2014. [DOI: 10.1016/s1388-2457(14)50181-2] [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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Kamada K, Kunii N, Kawai K, Saito N. P211: MEP threshold evaluated by deterministic tractography and subcortical stimulation. Clin Neurophysiol 2014. [DOI: 10.1016/s1388-2457(14)50342-2] [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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Navarro JRG, Lerouge F, Micouin G, Cepraga C, Favier A, Charreyre MT, Blanchard NP, Lermé J, Chaput F, Focsan M, Kamada K, Baldeck PL, Parola S. Plasmonic bipyramids for fluorescence enhancement and protection against photobleaching. Nanoscale 2014; 6:5138-5145. [PMID: 24643337 DOI: 10.1039/c3nr06425e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A great number of studies focus their interest on the photophysical properties of fluorescent hybrid gold nanoparticles for potential applications in biotechnologies such as imaging and/or treatment. Spherical gold nanoparticles are known to quench a chromophore fluorescent signal, when moieties are located in their close vicinity. The use of a polymer spacer on such a system allowed only partial recovery of the dye emission by controlling the surface to dye distance. Gold-based anisotropic sharp nanostructures appear to exhibit more interesting features due to the strong electric field generated at their edges and tips. In this paper, a complete study of hybrid fluorescent bipyramidal-like gold nanostructures is presented. We describe the chemical synthesis of gold bipyramids functionalized with fluorescent water-soluble polymers and their photophysics both in solution and on a single object. We show that the use of a bipyramidal shape instead of a spherical one leads to total recovery of the fluorescence and even to an enhancement of the emission of the dyes by a factor of 1.4.
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Affiliation(s)
- J R G Navarro
- Ecole Normale Supérieure de Lyon, CNRS, Université Lyon 1, Laboratoire de Chimie UMR 5182, 46, allée d'Italie, F-69364, Lyon Cedex 07, France.
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He BJ, Nolte G, Nagata K, Takano D, Yamazaki T, Fujimaki Y, Maeda T, Satoh Y, Heckers S, George MS, Lopes da Silva F, de Munck JC, Van Houdt PJ, Verdaasdonk RM, Ossenblok P, Mullinger K, Bowtell R, Bagshaw AP, Keeser D, Karch S, Segmiller F, Hantschk I, Berman A, Padberg F, Pogarell O, Scharnowski F, Karch S, Hümmer S, Keeser D, Paolini M, Kirsch V, Koller G, Rauchmann B, Kupka M, Blautzik J, Pogarell O, Razavi N, Jann K, Koenig T, Kottlow M, Hauf M, Strik W, Dierks T, Gotman J, Vulliemoz S, Lu Y, Zhang H, Yang L, Worrell G, He B, Gruber O, Piguet C, Hubl D, Homan P, Kindler J, Dierks T, Kim K, Steinhoff U, Wakai R, Koenig T, Kottlow M, Melie-García L, Mucci A, Volpe U, Prinster A, Salvatore M, Galderisi S, Linden DEJ, Brandeis D, Schroeder CE, Kayser C, Panzeri S, Kleinschmidt A, Ritter P, Walther S, Haueisen J, Lau S, Flemming L, Sonntag H, Maess B, Knösche TR, Lanfer B, Dannhauer M, Wolters CH, Stenroos M, Haueisen J, Wolters C, Aydin U, Lanfer B, Lew S, Lucka F, Ruthotto L, Vorwerk J, Wagner S, Ramon C, Guan C, Ang KK, Chua SG, Kuah WK, Phua KS, Chew E, Zhou H, Chuang KH, Ang BT, Wang C, Zhang H, Yang H, Chin ZY, Yu H, Pan Y, Collins L, Mainsah B, Colwell K, Morton K, Ryan D, Sellers E, Caves K, Throckmorton S, Kübler A, Holz EM, Zickler C, Sellers E, Ryan D, Brown K, Colwell K, Mainsah B, Caves K, Throckmorton S, Collins L, Wennberg R, Ahlfors SP, Grova C, Chowdhury R, Hedrich T, Heers M, Zelmann R, Hall JA, Lina JM, Kobayashi E, Oostendorp T, van Dam P, Oosterhof P, Linnenbank A, Coronel R, van Dessel P, de Bakker J, Rossion B, Jacques C, Witthoft N, Weiner KS, Foster BL, Miller KJ, Hermes D, Parvizi J, Grill-Spector K, Recanzone GH, Murray MM, Haynes JD, Richiardi J, Greicius M, De Lucia M, Müller KR, Formisano E, Smieskova R, Schmidt A, Bendfeldt K, Walter A, Riecher-Rössler A, Borgwardt S, Fusar-Poli P, Eliez S, Schmidt A, Sekihara K, Nagarajan SS, Schoffelen JM, Guggisberg AG, Nolte G, Balazs S, Kermanshahi K, Kiesenhofer W, Binder H, Rattay F, Antal A, Chaieb L, Paulus W, Bodis-Wollner I, Maurer K, Fein G, Camchong J, Johnstone J, Cardenas-Nicolson V, Fiederer LDJ, Lucka F, Yang S, Vorwerk J, Dümpelmann M, Cosandier-Rimélé D, Schulze-Bonhage A, Aertsen A, Speck O, Wolters CH, Ball T, Fuchs M, Wagner M, Kastner J, Tech R, Dinh C, Haueisen J, Baumgarten D, Hämäläinen MS, Lau S, Vogrin SJ, D'Souza W, Haueisen J, Cook MJ, Custo A, Van De Ville D, Vulliemoz S, Grouiller F, Michel CM, Malmivuo J, Aydin U, Vorwerk J, Küpper P, Heers M, Kugel H, Wellmer J, Kellinghaus C, Scherg M, Rampp S, Wolters C, Storti SF, Boscolo Galazzo I, Del Felice A, Pizzini FB, Arcaro C, Formaggio E, Mai R, Manganotti P, Koessler L, Vignal J, Cecchin T, Colnat-Coulbois S, Vespignani H, Ramantani G, Maillard L, Rektor I, Kuba R, Brázdil M, Chrastina J, Rektorova I, van Mierlo P, Carrette E, Strobbe G, Montes-Restrepo V, Vonck K, Vandenberghe S, Ahmed B, Brodely C, Carlson C, Kuzniecky R, Devinsky O, French J, Thesen T, Bénis D, David O, Lachaux JP, Seigneuret E, Krack P, Fraix V, Chabardès S, Bastin J, Jann K, Gee D, Kilroy E, Cannon T, Wang DJ, Hale JR, Mayhew SD, Przezdzik I, Arvanitis TN, Bagshaw AP, Plomp G, Quairiaux C, Astolfi L, Michel CM, Mayhew SD, Mullinger KJ, Bagshaw AP, Bowtell R, Francis ST, Schouten AC, Campfens SF, van der Kooij H, Koles Z, Lind J, Flor-Henry P, Wirth M, Haase CM, Villeneuve S, Vogel J, Jagust WJ, Kambeitz-Ilankovic L, Simon-Vermot L, Gesierich B, Duering M, Ewers M, Rektorova I, Krajcovicova L, Marecek R, Mikl M, Bracht T, Horn H, Strik W, Federspiel A, Schnell S, Höfle O, Stegmayer K, Wiest R, Dierks T, Müller TJ, Walther S, Surmeli T, Ertem A, Eralp E, Kos IH, Skrandies W, Flüggen S, Klein A, Britz J, Díaz Hernàndez L, Ro T, Michel CM, Lenartowicz A, Lau E, Rodriguez C, Cohen MS, Loo SK, Di Lorenzo G, Pagani M, Monaco L, Daverio A, Giannoudas I, La Porta P, Verardo AR, Niolu C, Fernandez I, Siracusano A, Flor-Henry P, Lind J, Koles Z, Bollmann S, Ghisleni C, O'Gorman R, Poil SS, Klaver P, Michels L, Martin E, Ball J, Eich-Höchli D, Brandeis D, Salisbury DF, Murphy TK, Butera CD, Mathalon DH, Fryer SL, Kiehl KA, Calhoun VC, Pearlson GD, Roach BJ, Ford JM, McGlashan TH, Woods SW, Volpe U, Merlotti E, Vignapiano A, Montefusco V, Plescia GM, Gallo O, Romano P, Mucci A, Galderisi S, Mingoia G, Langbein K, Dietzek M, Wagner G, Smesny, Scherpiet S, Maitra R, Gaser C, Sauer H, Nenadic I, Gonzalez Andino S, Grave de Peralta Menendez R, Grave de Peralta Menendez R, Sanchez Vives M, Rebollo B, Gonzalez Andino S, Frølich L, Andersen TS, Mørup M, Belfiore P, Gargiulo P, Ramon C, Vanhatalo S, Cho JH, Vorwerk J, Wolters CH, Knösche TR, Watanabe T, Kawabata Y, Ukegawa D, Kawabata S, Adachi Y, Sekihara K, Sekihara K, Nagarajan SS, Wagner S, Aydin U, Vorwerk J, Herrmann C, Burger M, Wolters C, Lucka F, Aydin U, Vorwerk J, Burger M, Wolters C, Bauer M, Trahms L, Sander T, Faber PL, Lehmann D, Gianotti LRR, Pascual-Marqui RD, Milz P, Kochi K, Kaneko S, Yamashita S, Yana K, Kalogianni K, Vardy AN, Schouten AC, van der Helm FCT, Sorrentino A, Luria G, Aramini R, Hunold A, Funke M, Eichardt R, Haueisen J, Gómez-Aguilar F, Vázquez-Olvera S, Cordova-Fraga T, Castro-López J, Hernández-Gonzalez MA, Solorio-Meza S, Sosa-Aquino M, Bernal-Alvarado JJ, Vargas-Luna M, Vorwerk J, Magyari L, Ludewig J, Oostenveld R, Wolters CH, Vorwerk J, Engwer C, Ludewig J, Wolters C, Sato K, Nishibe T, Furuya M, Yamashiro K, Yana K, Ono T, Puthanmadam Subramaniyam N, Hyttinen J, Lau S, Güllmar D, Flemming L, Haueisen J, Sonntag H, Vorwerk J, Wolters CH, Grasedyck L, Haueisen J, Maeß B, Freitag S, Graichen U, Fiedler P, Strohmeier D, Haueisen J, Stenroos M, Hauk O, Grigutsch M, Felber M, Maess B, Herrmann B, Strobbe G, van Mierlo P, Vandenberghe S, Strobbe G, Cárdenas-Peña D, Montes-Restrepo V, van Mierlo P, Castellanos-Dominguez G, Vandenberghe S, Lanfer B, Paul-Jordanov I, Scherg M, Wolters CH, Ito Y, Sato D, Kamada K, Kobayashi T, Dalal SS, Rampp S, Willomitzer F, Arold O, Fouladi-Movahed S, Häusler G, Stefan H, Ettl S, Zhang S, Zhang Y, Li H, Kong X, Montes-Restrepo V, Strobbe G, van Mierlo P, Vandenberghe S, Wong DDE, Bidet-Caulet A, Knight RT, Crone NE, Dalal SS, Birot G, Spinelli L, Vulliémoz S, Seeck M, Michel CM, Emory H, Wells C, Mizrahi N, Vogrin SJ, Lau S, Cook MJ, Karahanoglu FI, Grouiller F, Caballero-Gaudes C, Seeck M, Vulliemoz S, Van De Ville D, Spinelli L, Megevand P, Genetti M, Schaller K, Michel C, Vulliemoz S, Seeck M, Genetti M, Tyrand R, Grouiller F, Vulliemoz S, Spinelli L, Seeck M, Schaller K, Michel CM, Grouiller F, Heinzer S, Delattre B, Lazeyras F, Spinelli L, Pittau F, Seeck M, Ratib O, Vargas M, Garibotto V, Vulliemoz S, Vogrin SJ, Bailey CA, Kean M, Warren AE, Davidson A, Seal M, Harvey AS, Archer JS, Papadopoulou M, Leite M, van Mierlo P, Vonck K, Boon P, Friston K, Marinazzo D, Ramon C, Holmes M, Koessler L, Rikir E, Gavaret M, Bartolomei F, Vignal JP, Vespignani H, Maillard L, Centeno M, Perani S, Pier K, Lemieux L, Clayden J, Clark C, Pressler R, Cross H, Carmichael DW, Spring A, Bessemer R, Pittman D, Aghakhani Y, Federico P, Pittau F, Grouiller F, Vulliémoz S, Gotman J, Badier JM, Bénar CG, Bartolomei F, Cruto C, Chauvel P, Gavaret M, Brodbeck V, van Leeuwen T, Tagliazzuchi E, Melloni L, Laufs H, Griskova-Bulanova I, Dapsys K, Klein C, Hänggi J, Jäncke L, Ehinger BV, Fischer P, Gert AL, Kaufhold L, Weber F, Marchante Fernandez M, Pipa G, König P, Sekihara K, Hiyama E, Koga R, Iannilli E, Michel CM, Bartmuss AL, Gupta N, Hummel T, Boecker R, Holz N, Buchmann AF, Blomeyer D, Plichta MM, Wolf I, Baumeister S, Meyer-Lindenberg A, Banaschewski T, Brandeis D, Laucht M, Natahara S, Ueno M, Kobayashi T, Kottlow M, Bänninger A, Koenig T, Schwab S, Koenig T, Federspiel A, Dierks T, Jann K, Natsukawa H, Kobayashi T, Tüshaus L, Koenig T, Kottlow M, Achermann P, Wilson RS, Mayhew SD, Assecondi S, Arvanitis TN, Bagshaw AP, Darque A, Rihs TA, Grouiller F, Lazeyras F, Ha-Vinh Leuchter R, Caballero C, Michel CM, Hüppi PS, Hauser TU, Hunt LT, Iannaccone R, Stämpfli P, Brandeis D, Dolan RJ, Walitza S, Brem S, Graichen U, Eichardt R, Fiedler P, Strohmeier D, Freitag S, Zanow F, Haueisen J, Lordier L, Grouiller F, Van de Ville D, Sancho Rossignol A, Cordero I, Lazeyras F, Ansermet F, Hüppi P, Schläpfer A, Rubia K, Brandeis D, Di Lorenzo G, Pagani M, Monaco L, Daverio A, Giannoudas I, Verardo AR, La Porta P, Niolu C, Fernandez I, Siracusano A, Tamura K, Karube C, Mizuba T, Matsufuji M, Takashima S, Iramina K, Assecondi S, Ostwald D, Bagshaw AP, Marecek R, Brazdil M, Lamos M, Slavícek T, Marecek R, Jan J, Meier NM, Perrig W, Koenig T, Minami T, Noritake Y, Nakauchi S, Azuma K, Minami T, Nakauchi S, Rodriguez C, Lenartowicz A, Cohen MS, Rodriguez C, Lenartowicz A, Cohen MS, Iramina K, Kinoshita H, Tamura K, Karube C, Kaneko M, Ide J, Noguchi Y, Cohen MS, Douglas PK, Rodriguez CM, Xia HJ, Zimmerman EM, Konopka CJ, Epstein PS, Konopka LM, Giezendanner S, Fisler M, Soravia L, Andreotti J, Wiest R, Dierks T, Federspiel A, Razavi N, Federspiel A, Dierks T, Hauf M, Jann K, Kamada K, Sato D, Ito Y, Okano K, Mizutani N, Kobayashi T, Thelen A, Murray M, Pastena L, Formaggio E, Storti SF, Faralli F, Melucci M, Gagliardi R, Ricciardi L, Ruffino G, Coito A, Macku P, Tyrand R, Astolfi L, He B, Wiest R, Seeck M, Michel C, Plomp G, Vulliemoz S, Fischmeister FPS, Glaser J, Schöpf V, Bauer H, Beisteiner R, Deligianni F, Centeno M, Carmichael DW, Clayden J, Mingoia G, Langbein K, Dietzek M, Wagner G, Smesny S, Scherpiet S, Maitra R, Gaser C, Sauer H, Nenadic I, Dürschmid S, Zaehle T, Pannek H, Chang HF, Voges J, Rieger J, Knight RT, Heinze HJ, Hinrichs H, Tsatsishvili V, Cong F, Puoliväli T, Alluri V, Toiviainen P, Nandi AK, Brattico E, Ristaniemi T, Grieder M, Crinelli RM, Jann K, Federspiel A, Wirth M, Koenig T, Stein M, Wahlund LO, Dierks T, Atsumori H, Yamaguchi R, Okano Y, Sato H, Funane T, Sakamoto K, Kiguchi M, Tränkner A, Schindler S, Schmidt F, Strauß M, Trampel R, Hegerl U, Turner R, Geyer S, Schönknecht P, Kebets V, van Assche M, Goldstein R, van der Meulen M, Vuilleumier P, Richiardi J, Van De Ville D, Assal F, Wozniak-Kwasniewska A, Szekely D, Harquel S, Bougerol T, David O, Bracht T, Jones DK, Horn H, Müller TJ, Walther S, Sos P, Klirova M, Novak T, Brunovsky M, Horacek J, Bares M, Hoschl C C, Fellhauer I, Zöllner FG, Schröder J, Kong L, Essig M, Schad LR, Arrubla J, Neuner I, Hahn D, Boers F, Shah NJ, Neuner I, Arrubla J, Hahn D, Boers F, Jon Shah N, Suriya Prakash M, Sharma R, Kawaguchi H, Kobayashi T, Fiedler P, Griebel S, Biller S, Fonseca C, Vaz F, Zentner L, Zanow F, Haueisen J, Rochas V, Rihs T, Thut G, Rosenberg N, Landis T, Michel C, Moliadze V, Schmanke T, Lyzhko E, Bassüner S, Freitag C, Siniatchkin M, Thézé R, Guggisberg AG, Nahum L, Schnider A, Meier L, Friedrich H, Jann K, Landis B, Wiest R, Federspiel A, Strik W, Dierks T, Witte M, Kober SE, Neuper C, Wood G, König R, Matysiak A, Kordecki W, Sieluzycki C, Zacharias N, Heil P, Wyss C, Boers F, Arrubla J, Dammers J, Kawohl W, Neuner I, Shah NJ, Braboszcz C, Cahn RB, Levy J, Fernandez M, Delorme A, Rosas-Martinez L, Milne E, Zheng Y, Urakami Y, Kawamura K, Washizawa Y, Hiyoshi K, Cichocki A, Giroud N, Dellwo V, Meyer M, Rufener KS, Liem F, Dellwo V, Meyer M, Jones-Rounds JD, Raizada R, Staljanssens W, Strobbe G, van Mierlo P, Van Holen R, Vandenberghe S, Pefkou M, Becker R, Michel C, Hervais-Adelman A, He W, Brock J, Johnson B, Ohla K, Hitz K, Heekeren K, Obermann C, Huber T, Juckel G, Kawohl W, Gabriel D, Comte A, Henriques J, Magnin E, Grigoryeva L, Ortega JP, Haffen E, Moulin T, Pazart L, Aubry R, Kukleta M, Baris Turak B, Louvel J, Crespo-Garcia M, Cantero JL, Atienza M, Connell S, Kilborn K, Damborská A, Brázdil M, Rektor I, Kukleta M, Koberda JL, Bienkiewicz A, Koberda I, Koberda P, Moses A, Tomescu M, Rihs T, Britz J, Custo A, Grouiller F, Schneider M, Debbané M, Eliez S, Michel C, Wang GY, Kydd R, Wouldes TA, Jensen M, Russell BR, Dissanayaka N, Au T, Angwin A, O'Sullivan J, Byrne G, Silburn P, Marsh R, Mellic G, Copland D, Bänninger A, Kottlow M, Díaz Hernàndez L, Koenig T, Díaz Hernàndez L, Bänninger A, Koenig T, Hauser TU, Iannaccone R, Mathys C, Ball J, Drechsler R, Brandeis D, Walitza S, Brem S, Boeijinga PH, Pang EW, Valica T, Macdonald MJ, Oh A, Lerch JP, Anagnostou E, Di Lorenzo G, Pagani M, Monaco L, Daverio A, Verardo AR, Giannoudas I, La Porta P, Niolu C, Fernandez I, Siracusano A, Shimada T, Matsuda Y, Monkawa A, Monkawa T, Hashimoto R, Watanabe K, Kawasaki Y, Matsuda Y, Shimada T, Monkawa T, Monkawa A, Watanabe K, Kawasaki Y, Stegmayer K, Horn H, Federspiel A, Razavi N, Bracht T, Laimböck K, Strik W, Dierks T, Wiest R, Müller TJ, Walther S, Koorenhof LJ, Swithenby SJ, Martins-Mourao A, Rihs TA, Tomescu M, Song KW, Custo A, Knebel JF, Murray M, Eliez S, Michel CM, Volpe U, Merlotti E, Vignapiano A, Montefusco V, Plescia GM, Gallo O, Romano P, Mucci A, Galderisi S, Laimboeck K, Jann K, Walther S, Federspiel A, Wiest R, Strik W, Horn H. Abstracts of Presentations at the International Conference on Basic and Clinical Multimodal Imaging (BaCI), a Joint Conference of the International Society for Neuroimaging in Psychiatry (ISNIP), the International Society for Functional Source Imaging (ISFSI), the International Society for Bioelectromagnetism (ISBEM), the International Society for Brain Electromagnetic Topography (ISBET), and the EEG and Clinical Neuroscience Society (ECNS), in Geneva, Switzerland, September 5-8, 2013. Clin EEG Neurosci 2013; 44:1550059413507209. [PMID: 24368763 DOI: 10.1177/1550059413507209] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- B J He
- National Institutes of Health, Bethesda, MD, USA
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Mizuki S, Murakami T, Oryoji K, Kamada K, Yokota E. AB0256 Risk factors associated with generalized bone loss in patients with rheumatoid arthritis: retrospective longitudinal study. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.2579] [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: 11/04/2022]
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Mizuki S, Murakami T, Oryoji K, Kamada K, Yokota E. THU0455 Survey of primary care physicians’ attitudes to co-management medical collaboration in treatment of rheumatoid arthritis: Comparison between physicians with and without rheumatology board certification. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.2420] [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: 11/04/2022]
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Arikawa Y, Hosoda H, Nagai T, Watanabe K, Yamanoi K, Cadatal-Raduban M, Shimizu T, Sarukura N, Nakai M, Norimatsu T, Azechi H, Izumi N, Murata T, Suyama T, Yoshikawa A, Kamada K, Usuki Y, Satoh N, Kan H. Multichannel down-scattered neutron detector for areal density measurement. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20135913011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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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Nikl M, Kamada K, Kurosawa S, Yokota Y, Yoshikawa A, Pejchal J, Babin V. Luminescence and scintillation mechanism in Ce3+and Pr3+doped (Lu,Y,Gd)3(Ga,Al)5O12single crystal scintillators. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pssc.201200499] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Yoshikawa A, Yanagida T, Yokota Y, Kamada K, Kawaguchi N, Fukuda K, Yamazaki A, Watanabe K, Uritani A, Iguchi T, Boulon G, Nikl M. Development of novel rare earth doped fluoride and oxide scintillators for two-dimensional imaging. J RARE EARTH 2011. [DOI: 10.1016/s1002-0721(10)60621-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Kamada K, Kunii N, Ota T, Kawai K, Saito N. S10-4 Spatial and temporal dynamics of language-related and face recognition brain functions by electrocorticogram and MEG. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60083-1] [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: 11/27/2022]
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Kamada K, Kawai K, Ota T, Kunii N, Saito N. S39-5 Visualization of the subcortical language fibers on tractography by co-utilizing functional MRI and MEG. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60246-5] [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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Kunii N, Kamada K, Ota T, Kawai K, Saito N. P18-22 The detailed analysis of fMRI in the frontal language area. A comparative study with electrocortical stimulation. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60875-9] [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: 11/25/2022]
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Arikawa Y, Yamanoi K, Nakazato T, Estacio ES, Shimizu T, Sarukura N, Nakai M, Hosoda H, Norimatsu T, Hironaka Y, Azechi H, Izumi N, Murata T, Fujino S, Yoshida H, Kamada K, Usuki Y, Suyama T, Yoshikawa A, Satoh N, Kan H. Down-scattered neutron imaging detector for areal density measurement of inertial confinement fusion. Rev Sci Instrum 2010; 81:10D303. [PMID: 21033829 DOI: 10.1063/1.3475535] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A custom developed (6)Li glass scintillator (APLF80+3Pr) for down-scattered neutron diagnostics in inertial confinement fusion experiments is presented. (6)Li provides an enhanced sensitivity for down-scattered neutrons in DD fusion and its experimentally observed 5-6 ns response time fulfills the requirement for down-scattered neutron detectors. A time-of-flight detector operating in the current mode using the APLF80+3Pr was designed and its feasibility observing down-scattered neutrons was demonstrated. Furthermore, a prototype design for a down-scattered neutron imaging detector was also demonstrated. This material promises viability as a future down-scattered neutron detector for the National Ignition Facility.
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Affiliation(s)
- Y Arikawa
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan.
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Shioyama H, Kamada K. New method to evaluate the mobility of ions in the nanochannels of polymer electrolyte membranes. Polym Sci Ser A 2010. [DOI: 10.1134/s0965545x10070072] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Houkin K, Nakayama N, Kamada K, Noujou T, Abe H, Kashiwaba T. Neuroprotective effect of the free radical scavenger MCI-186 in patients with cerebral infarction: clinical evaluation using magnetic resonance imaging and spectroscopy. J Stroke Cerebrovasc Dis 2009; 7:315-22. [PMID: 17895107 DOI: 10.1016/s1052-3057(98)80049-9] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/1997] [Accepted: 03/26/1998] [Indexed: 11/28/2022] Open
Abstract
A newly developed free radical scavenger, 3-methyl-1-phenyl-2-pyrazolin-5-one (MCI-186), holds promise for clinical application. We clinically evaluated the effect of MCI-186 on cerebral infarction by using magnetic resonance imaging (MRI) and proton MR spectroscopy (MRS). Six patients with large supratentorial infarction were evaluated with sequential MRI and proton MRS. These patients were also administered MCI-186 for 14 days after ischemic insult (MCI-186 group). The findings were compared with those for patients who had supratentorial infarctions equivalent in size to those in the MCI-186 group but who had received only conventional therapy. The course of change of the size of infarction was evaluated by MRI, and the metabolic changes following cerebral infarction were evaluated by proton MRS. As a result, there was no significant difference between the initial size of infarction in the conventionally treated group and that in the MCI-186 treated groups, nor did the groups show significant difference in the sequential changes depicted by MRI in the area of infarction, midline shift, or amount of edema. However, on MRS, the N-acetyl aspartate signal was significantly higher in the MCI-186 group than in the conventionally treated patients. In conclusion, MCI-186 has an effect of preservation of N-acetyl-aspartate, which is thought to be a neuronal marker, in cerebral infarction.
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Affiliation(s)
- K Houkin
- Department of Neurosurgery, Hokkaido University School of Medicine, Kashiwaba Neurosurgical Hospital, Sapporo, Japan
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Murakami Y, Kakeda S, Kamada K, Ohnari N, Nishimura J, Ogawa M, Otsubo K, Morishita Y, Korogi Y. Effect of tube voltage on image quality in 64-section multidetector 3D CT angiography: Evaluation with a vascular phantom with superimposed bone skull structures. AJNR Am J Neuroradiol 2009; 31:620-5. [PMID: 19942711 DOI: 10.3174/ajnr.a1871] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
BACKGROUND AND PURPOSE Optimal tube voltage and tube current settings are not well established. The purpose of our study was to investigate the image quality on 3D CT angiograms of the brain at various kilovoltage settings by evaluating the depiction of simulated intracranial lesions by using a vascular phantom. MATERIALS AND METHODS An anthropomorphic vascular phantom with superimposed bone skull structures was designed to simulate various intracranial aneurysms with aneurysmal blebs. We performed CT angiography by using a 64-detector row CT scanner for various effective tube currents with 4 tube voltages of 80, 100, 120, and 135 kV(p). Simulated aneurysm enhancement and image noise were quantified; SNR and CNR were calculated. The depiction of the simulated aneurysms and blebs on 3D CT angiograms obtained with the volume-rendering technique was subjectively assessed. The effective dose was calculated on the basis of a CTDIw. The results of several protocols were compared by using the Student t test. RESULTS At identical doses levels (CTDIw), the mean SNR and CNR at 100 kV(p) were significantly higher than those at 80, 120, and 135 kV(p); and the mean qualitative image score at 100 kV(p) was significantly superior to those at 80 and 135 kV(p). CONCLUSIONS Our phantom study suggests that the tube voltage of 100 kV(p) is desirable for cerebral 3D CT angiograms, and the higher or lower kilovoltage settings may result in the degradation in diagnostic image quality.
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Affiliation(s)
- Y Murakami
- Department of Radiology, University of Occupational and Environmental Health School of Medicine, Kitakyushu, Japan.
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Kakeda S, Korogi Y, Kamada K, Ohnari N, Moriya J, Sato T, Kitajima M, Hasnine H, Hirata N. Signal intensity of the motor cortex on phase-weighted imaging at 3T. AJNR Am J Neuroradiol 2008; 29:1171-5. [PMID: 18388220 DOI: 10.3174/ajnr.a1002] [Citation(s) in RCA: 21] [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: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE It is known that the motor cortex shows hypointensity on T2-weighted images in older patients. The goal of this study was to assess the signal intensity of the motor cortices on the phase-weighted imaging performed with a Windows-based software program that we developed ourselves. MATERIALS AND METHODS All studies were performed at 3T MR imaging. First, the TE for the phase-weighted image was optimized; the best contrast between the motor and other cortices was obtained with a TE of 40 ms. The study population consisted of 45 healthy subjects (23 females, 22 males; mean age, 32.1 years). The signal intensity of the motor cortices was divided into 3 grades by 2 neuroradiologists in comparison with that of the superior frontal cortex (SFC): In grade I, the motor cortex was isointense to the SFC; in grade II, the motor cortex was slightly hypointense to the SFC; and in grade III, the motor cortex was markedly hypointense to the SFC. RESULTS The motor cortex was classified as either grade II or III in all subjects older than 20 years of age on the phase-weighted images. Even at 10-19 years of age, the grade II or III appearance was found in 14 (88%) of 16 motor cortices (8 subjects) on the phase-weighted images. CONCLUSION In adolescents, the motor cortex is hypointense to other cerebral cortices on phase-weighted MR imaging, which probably reflects differences in the concentration of nonheme iron and/or in the tissue architecture.
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Affiliation(s)
- S Kakeda
- Department of Radiology, University of Occupational and Environmental Health School of Medicine, Kitakyushu, Japan.
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Ezaki Y, Nakashima K, Kamada K, Kaminogo M. Reversible widespread ischemia after early reperfusion detected by initial diffusion-weighted magnetic resonance imaging. ACTA ACUST UNITED AC 2007; 25:553-7. [DOI: 10.1007/s11604-007-0180-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2007] [Accepted: 07/25/2007] [Indexed: 10/22/2022]
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Affiliation(s)
- K. Kamada
- a Institute of Plasma Physics of Nagoya University , Nagoya, 464, Japan
| | - A. Sagara
- a Institute of Plasma Physics of Nagoya University , Nagoya, 464, Japan
| | - H. Kinoshita
- b Faculty of Engineering, Hokkaido University , Sapporo, 060, Japan
| | - H. Takahashi
- b Faculty of Engineering, Hokkaido University , Sapporo, 060, Japan
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Gaskin F, Kamada K, Yusof M, Korthuis R. 5′‐AMP‐activated protein kinase activation prevents postischemic leukocyte‐endothelial cell adhesive interactions: Role of ATP‐sensitive potassium channels. FASEB J 2006. [DOI: 10.1096/fasebj.20.5.a1159] [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] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- F Gaskin
- Med. Pharmacology & PhysiologyUniv. of Missouri1 Hospital DrColumbiaMO65212
- Dalton Cardiovascular Research Center134 Research ParkColumbiaMO65212
| | - K Kamada
- Med. Pharmacology & PhysiologyUniv. of Missouri1 Hospital DrColumbiaMO65212
| | - M Yusof
- Med. Pharmacology & PhysiologyUniv. of Missouri1 Hospital DrColumbiaMO65212
| | - R Korthuis
- Med. Pharmacology & PhysiologyUniv. of Missouri1 Hospital DrColumbiaMO65212
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Yusof M, Kamada K, Gaskin F, Korthuis RJ. The role of angiotensin II in postischemic leukocyte‐endothelial interactions. FASEB J 2006. [DOI: 10.1096/fasebj.20.5.a1159-a] [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] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- M Yusof
- Dept Med Pharmacology & Physiology and The Dalton Cardiovascular Research CtrUniv of MissouriMA415ColumbiaMO65212
| | - K Kamada
- Dept Med Pharmacology & Physiology and The Dalton Cardiovascular Research CtrUniv of MissouriMA415ColumbiaMO65212
| | - F Gaskin
- Dept Med Pharmacology & Physiology and The Dalton Cardiovascular Research CtrUniv of MissouriMA415ColumbiaMO65212
| | - R J Korthuis
- Dept Med Pharmacology & Physiology and The Dalton Cardiovascular Research CtrUniv of MissouriMA415ColumbiaMO65212
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Yusof M, Kamada K, Gaskin F, Korthuis RJ. Hydrogen sulfide: A novel gasotransmitter that prevents postischemic leukocyte‐endothelial interactions. FASEB J 2006. [DOI: 10.1096/fasebj.20.4.a291-c] [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] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- M Yusof
- Dept Med Pharmacology & Physiology and The Dalton Cardiovascular Research CtrUniv of MissouriMA415ColumbiaMO65212
| | - K Kamada
- Dept Med Pharmacology & Physiology and The Dalton Cardiovascular Research CtrUniv of MissouriMA415ColumbiaMO65212
| | - F Gaskin
- Dept Med Pharmacology & Physiology and The Dalton Cardiovascular Research CtrUniv of MissouriMA415ColumbiaMO65212
| | - R J Korthuis
- Dept Med Pharmacology & Physiology and The Dalton Cardiovascular Research CtrUniv of MissouriMA415ColumbiaMO65212
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Yusof M, Yamaguchi T, Kamada K, Gaskin F, Durante W, Korthuis RJ. Heme oxygenase‐1 serves as an important effector in the postischemic anti‐inflammatory phenotype induced by antecedent ethanol ingestion. FASEB J 2006. [DOI: 10.1096/fasebj.20.4.a231-a] [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] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- M Yusof
- Dept Med Pharmacology & Physiology and The Dalton Cardiovascular Research CtrUniv of MissouriMA415ColumbiaMO65212
| | - T Yamaguchi
- Dept Med Pharmacology & Physiology and The Dalton Cardiovascular Research CtrUniv of MissouriMA415ColumbiaMO65212
| | - K Kamada
- Dept Med Pharmacology & Physiology and The Dalton Cardiovascular Research CtrUniv of MissouriMA415ColumbiaMO65212
| | - F Gaskin
- Dept Med Pharmacology & Physiology and The Dalton Cardiovascular Research CtrUniv of MissouriMA415ColumbiaMO65212
| | - W Durante
- Dept Med & PharmacologyBaylor Coll of Med2002 Holcombe BlvdHoustonTX77030
| | - R J Korthuis
- Dept Med Pharmacology & Physiology and The Dalton Cardiovascular Research CtrUniv of MissouriMA415ColumbiaMO65212
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Gaskin F, Kamada K, Yusof M, Korthuis R. 5′‐AMP‐activated protein kinase activation prevents postischemic leukocyte‐endothelial cell adhesive interactions: Role of nitric oxide. FASEB J 2006. [DOI: 10.1096/fasebj.20.5.a1158-d] [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] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- F Gaskin
- Med. Pharmacology & PhysiologyUniv. of Missouri1 Hospital DrColumbiaMO65212
- Dalton Cardiovascular Research Center134 Research ParkColumbiaMO65212
| | - K Kamada
- Med. Pharmacology & PhysiologyUniv. of Missouri1 Hospital DrColumbiaMO65212
| | - M Yusof
- Med. Pharmacology & PhysiologyUniv. of Missouri1 Hospital DrColumbiaMO65212
| | - R Korthuis
- Med. Pharmacology & PhysiologyUniv. of Missouri1 Hospital DrColumbiaMO65212
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Sawase T, Yoshida K, Taira Y, Kamada K, Atsuta M, Baba K. Abrasion resistance of titanium nitride coatings formed on titanium by ion-beam-assisted deposition. J Oral Rehabil 2005; 32:151-7. [PMID: 15641983 DOI: 10.1111/j.1365-2842.2004.01382.x] [Citation(s) in RCA: 25] [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: 11/30/2022]
Abstract
To improve the physical properties of the pure titanium surface, thin titanium nitride (TiN) films were deposited by means of ion-beam-assisted deposition. Film structure was confirmed as TiN by X-ray diffraction analysis. Surface hardness and abrasion resistance were significantly improved on TiN-coated specimens. Five combinations of oral hygiene instruments and materials were applied to the specimens as simulations of the oral environment. Treatment with the metal scaler and ultrasonic scaler severely changed the surface features and significantly increased the surface roughness parameters on pure titanium controls, whereas only small scratches and dull undulations were seen on the TiN-coated specimens. Profilometric tracings and scanning electron micrographs demonstrated the improved abrasion resistance of the TiN-coated specimens.
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Affiliation(s)
- T Sawase
- Division of Fixed Prosthodontics and Oral Rehabilitation, Department of Developmental and Reconstructive Medicine, Graduate School of Biomedical Sciences, Nagasaki University, 1-7-1, Sakamoto, Nagasaki 852-8588, Japan.
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Nikl M, Yoshikawa A, Satonaga T, Kamada K, Sato H, Solovieva N, Beitlerova A, Fukuda T. Scintillation characteristics of PrF3:Ce single crystal. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/pssa.200409070] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [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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Nakamura S, Yoshida K, Kamada K, Atsuta M. Bonding between resin luting cement and glass infiltrated alumina-reinforced ceramics with silane coupling agent. J Oral Rehabil 2004; 31:785-9. [PMID: 15265215 DOI: 10.1111/j.1365-2842.2004.01304.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [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: 11/25/2022]
Abstract
The purpose of this study was to evaluate the shear bond strengths of three dual-cured resin luting cements (Linkmax HV, Panavia Fluoro Cement, and RelyX ARC) to glass-infiltrated alumina-reinforced ceramic material and the effect of four silane coupling agents (Clearfil Porcelain Bond, GC Ceramic Primer, Porcelain LinerM, and Tokuso Ceramic Primer) on the bond strength. The two type-shaped of In-Ceram alumina ceramic glass-infiltrated specimens were untreated or treated with one of the four ceramic primers and then cemented together with one of the three dual-cured resin luting cements. Half of the specimens were stored in water at 37 degrees C for 24 h and the other half thermocycled 20,000 times before shear bond strength testing. Surface treatment by all silane coupling agents improved the shear bond strength compared with non-treatment. The specimens treated with Clearfil Porcelain Bond showed significantly greater shear bond strength than any of the other three silane coupling agents regardless of resin luting cements and thermocycling except for the use of Panavia Fluoro Cement at 20,000 thermocycles. When the alumina-reinforced ceramic material was treated with any silane coupling agent except GC Ceramic Primer and cemented with Linkmax HV, no significant differences in bond strength were noted between after water storage and after 20,000 thermocycles. After 20,000 thermocycles, all specimens except for the combined use of Clearfil Porcelain Bond or GC Ceramic Primer and Linkmax HV and GC Ceramic Primer and Panavia Fluoro Cement showed adhesive failures at the ceramic-resin luting cement interface.
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Affiliation(s)
- S Nakamura
- Division of Fixed Prosthodontics and Oral Rehabilitation, Nagasaki University, Graduate School of Biomedical Sciences, Nagasaki, Japan
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