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Book ; Online: HOKEM

Ito, Yoshiki

Human and Object Keypoint-based Extension Module for Human-Object Interaction Detection

2023

Abstract: Human-object interaction (HOI) detection for capturing relationships between humans and objects is an important task in the semantic understanding of images. When processing human and object keypoints extracted from an image using a graph convolutional ... ...

Abstract	Human-object interaction (HOI) detection for capturing relationships between humans and objects is an important task in the semantic understanding of images. When processing human and object keypoints extracted from an image using a graph convolutional network (GCN) to detect HOI, it is crucial to extract appropriate object keypoints regardless of the object type and to design a GCN that accurately captures the spatial relationships between keypoints. This paper presents the human and object keypoint-based extension module (HOKEM) as an easy-to-use extension module to improve the accuracy of the conventional detection models. The proposed object keypoint extraction method is simple yet accurately represents the shapes of various objects. Moreover, the proposed human-object adaptive GCN (HO-AGCN), which introduces adaptive graph optimization and attention mechanism, accurately captures the spatial relationships between keypoints. Experiments using the HOI dataset, V-COCO, showed that HOKEM boosted the accuracy of an appearance-based model by a large margin. Comment: Accepted to IEEE ICIP 2023
Keywords	Computer Science - Computer Vision and Pattern Recognition ; Computer Science - Machine Learning
Subject code	004
Publishing date	2023-06-25
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Learning poly-synaptic paths with traveling waves.

Ito, Yoshiki / Toyoizumi, Taro

PLoS computational biology

2021 Volume 17, Issue 2, Page(s) e1008700

Abstract: Traveling waves are commonly observed across the brain. While previous studies have suggested the role of traveling waves in learning, the mechanism remains unclear. We adopted a computational approach to investigate the effect of traveling waves on ... ...

Abstract	Traveling waves are commonly observed across the brain. While previous studies have suggested the role of traveling waves in learning, the mechanism remains unclear. We adopted a computational approach to investigate the effect of traveling waves on synaptic plasticity. Our results indicate that traveling waves facilitate the learning of poly-synaptic network paths when combined with a reward-dependent local synaptic plasticity rule. We also demonstrate that traveling waves expedite finding the shortest paths and learning nonlinear input/output mapping, such as exclusive or (XOR) function.
MeSH term(s)	Animals ; Brain/physiology ; Computational Biology ; Computer Simulation ; Dopamine/metabolism ; Humans ; Learning ; Memory ; Models, Neurological ; Neuronal Plasticity ; Neurons/physiology ; Nonlinear Dynamics ; Signal Transduction ; Synapses/physiology
Chemical Substances	Dopamine (VTD58H1Z2X)
Language	English
Publishing date	2021-02-09
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2193340-6
ISSN	1553-7358 ; 1553-734X
ISSN (online)	1553-7358
ISSN	1553-734X
DOI	10.1371/journal.pcbi.1008700
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Characteristics of deceased subjects transported to a postmortem imaging center due to unusual death related to epilepsy.

Ito, Yoshiki / Hata, Nobuhiro / Maesawa, Satoshi / Tanei, Takafumi / Ishizaki, Tomotaka / Mutoh, Manabu / Hashida, Miki / Kobayashi, Yutaka / Saito, Ryuta

Epilepsia open

2024 Volume 9, Issue 2, Page(s) 592–601

Abstract: Objective: Patients with epilepsy have high risk of experiencing uncommon causes of death. This study aimed to evaluate patients who underwent unusual deaths related to epilepsy and identify factors that may contribute to these deaths and may also ... ...

Abstract	Objective: Patients with epilepsy have high risk of experiencing uncommon causes of death. This study aimed to evaluate patients who underwent unusual deaths related to epilepsy and identify factors that may contribute to these deaths and may also include sudden unexpected death in epilepsy (SUDEP). Methods: We analyzed 5291 cases in which a postmortem imaging (PMI) study was performed using plane CT, because of an unexplained death. A rapid troponin T assay was performed using peripheral blood samples. Clinical information including the cause of death suspected by the attending physician, body position, place of death, medical history, and antiseizure medications was evaluated. Results: A total of 132 (2.6%) patients had an obvious history of epilepsy, while 5159 individuals had no history of epilepsy (97.4%). Cerebrovascular disease was the cause of death in 1.6% of patients in the group with epilepsy, and this was significantly lower than that in the non-epilepsy group. However, drowning was significantly higher (9.1% vs. 4.4%). Unspecified cause of death was significantly more frequent in the epilepsy group (78.0% vs. 57.8%). Furthermore, the proportion of patients who demonstrated elevation of troponin T levels without prior cardiac disease was significantly higher in the epilepsy group (37.9% vs. 31.1%). At discovery of death, prone position was dominant (30.3%), with deaths occurring most commonly in the bedroom (49.2%). No antiseizure medication had been prescribed in 12% of cases, while 29.5% of patients were taking multiple antiseizure medications. Significance: The prevalence of epilepsy in individuals experiencing unusual death was higher than in the general population. Despite PMI studies, no definitive cause of death was identified in a significant proportion of cases. The high troponin T levels may be explained by long intervals between death and examination or by higher incidence of myocardial damage at the time of death. Plain language summary: This study investigated unusual deaths in epilepsy patients, analyzing 5291 postmortem imaging cases. The results showed that 132 cases (2.6%) had a clear history of epilepsy. In these cases, only 22% cases were explained after postmortem examination, which is less than in non-epilepsy group (42.2%). Cerebrovascular disease was less common in the epilepsy group, while drowning was more common. Elevated troponin T levels, which suggest possibility of myocardial damage or long intervals between death and examination, were also more frequent in the epilepsy group compared to non-epilepsy group.
MeSH term(s)	Humans ; Drowning ; Postmortem Imaging ; Troponin T/therapeutic use ; Epilepsy/drug therapy ; Epilepsy/diagnosis ; Autopsy ; Cerebrovascular Disorders
Chemical Substances	Troponin T
Language	English
Publishing date	2024-02-01
Publishing country	United States
Document type	Journal Article
ISSN	2470-9239
ISSN (online)	2470-9239
DOI	10.1002/epi4.12891
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Article ; Online: Boltless nylon-suture technique for stereotactic electroencephalography as a safe, effective alternative when the anchor bolt is inappropriate.

Mutoh, Manabu / Maesawa, Satoshi / Nakatsubo, Daisuke / Ishizaki, Tomotaka / Tanei, Takafumi / Torii, Jun / Ito, Yoshiki / Hashida, Miki / Saito, Ryuta

Acta neurochirurgica

2024 Volume 166, Issue 1, Page(s) 18

Abstract: Background: The use of anchor bolts to secure electrodes to the skull can be difficult in some clinical situations. Herein, we present the boltless technique to secure electrodes to the scalp using nylon sutures to overcome the problems associated with ... ...

Abstract	Background: The use of anchor bolts to secure electrodes to the skull can be difficult in some clinical situations. Herein, we present the boltless technique to secure electrodes to the scalp using nylon sutures to overcome the problems associated with anchor bolts. We investigated the safety, accuracy errors, and patient-related and operative factors affecting errors in the boltless technique. Methods: This single-institution retrospective series analyzed 103 electrodes placed in 12 patients. The target-point localization error (TPLE), entry-point localization error (EPLE), radial error (RE), and depth error (DE) of the electrodes were calculated. Results: The median of the mean operative time per electrode was 9.3 min. The median TPLE, EPLE, RE, and absolute DE value were 4.1 mm, 1.6 mm, 2.7 mm, and 1.9 mm, respectively. Positive correlations were observed between the preoperative scalp thickness, mean operative time per electrode, EPLE, RE, and the absolute value of DE versus TPLE (r = .228, p = .02; r = .678, p = .015; r = .228, p = .02; r = .445, p < .01; r = .630, p < .01, respectively), and electrode approach angle versus EPLE (r = .213, p = .031). Multivariate analysis revealed that the absolute value of DE had the strongest influence on the TPLE, followed by RE and preoperative scalp thickness, respectively (β = .938, .544, .060, respectively, p < .001). No complications related to SEEG insertion and monitoring were encountered. Conclusion: The boltless technique using our unique planning and technical method is a safe, effective, and low-cost alternative in cases where anchor bolts are contraindicated.
MeSH term(s)	Humans ; Nylons ; Retrospective Studies ; Electroencephalography ; Scalp ; Suture Techniques ; Sutures
Chemical Substances	Nylons
Language	English
Publishing date	2024-01-17
Publishing country	Austria
Document type	Journal Article
ZDB-ID	80010-7
ISSN	0942-0940 ; 0001-6268
ISSN (online)	0942-0940
ISSN	0001-6268
DOI	10.1007/s00701-024-05889-3
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Book ; Online: Efficient and Accurate Skeleton-Based Two-Person Interaction Recognition Using Inter- and Intra-body Graphs

Ito, Yoshiki / Kong, Quan / Morita, Kenichi / Yoshinaga, Tomoaki

2022

Abstract: Skeleton-based two-person interaction recognition has been gaining increasing attention as advancements are made in pose estimation and graph convolutional networks. Although the accuracy has been gradually improving, the increasing computational ... ...

Abstract	Skeleton-based two-person interaction recognition has been gaining increasing attention as advancements are made in pose estimation and graph convolutional networks. Although the accuracy has been gradually improving, the increasing computational complexity makes it more impractical for a real-world environment. There is still room for accuracy improvement as the conventional methods do not fully represent the relationship between inter-body joints. In this paper, we propose a lightweight model for accurately recognizing two-person interactions. In addition to the architecture, which incorporates middle fusion, we introduce a factorized convolution technique to reduce the weight parameters of the model. We also introduce a network stream that accounts for relative distance changes between inter-body joints to improve accuracy. Experiments using two large-scale datasets, NTU RGB+D 60 and 120, show that our method simultaneously achieved the highest accuracy and relatively low computational complexity compared with the conventional methods. Comment: Accepted to IEEE ICIP 2022
Keywords	Computer Science - Computer Vision and Pattern Recognition ; Computer Science - Machine Learning
Subject code	004
Publishing date	2022-07-26
Publishing country	us
Document type	Book ; Online
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Article ; Online: Spontaneous beat synchronization in rats: Neural dynamics and motor entrainment.

Ito, Yoshiki / Shiramatsu, Tomoyo Isoguchi / Ishida, Naoki / Oshima, Karin / Magami, Kaho / Takahashi, Hirokazu

Science advances

2022 Volume 8, Issue 45, Page(s) eabo7019

Abstract: Beat perception and synchronization within 120 to 140 beats/min (BPM) are common in humans and frequently used in music composition. Why beat synchronization is uncommon in some species and the mechanism determining the optimal tempo are unclear. Here, ... ...

Abstract	Beat perception and synchronization within 120 to 140 beats/min (BPM) are common in humans and frequently used in music composition. Why beat synchronization is uncommon in some species and the mechanism determining the optimal tempo are unclear. Here, we examined physical movements and neural activities in rats to determine their beat sensitivity. Close inspection of head movements and neural recordings revealed that rats displayed prominent beat synchronization and activities in the auditory cortex within 120 to 140 BPM. Mathematical modeling suggests that short-term adaptation underlies this beat tuning. Our results support the hypothesis that the optimal tempo for beat synchronization is determined by the time constant of neural dynamics conserved across species, rather than the species-specific time constant of physical movements. Thus, latent neural propensity for auditory motor entrainment may provide a basis for human entrainment that is much more widespread than currently thought. Further studies comparing humans and animals will offer insights into the origins of music and dancing.
Language	English
Publishing date	2022-11-11
Publishing country	United States
Document type	Journal Article
ZDB-ID	2810933-8
ISSN	2375-2548 ; 2375-2548
ISSN (online)	2375-2548
ISSN	2375-2548
DOI	10.1126/sciadv.abo7019
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Article: Relief of Central Poststroke Pain Affecting Both the Arm and Leg on One Side by Double-independent Dual-lead Spinal Cord Stimulation Using Fast-acting Subperception Therapy Stimulation: A Case Report.

Tanei, Takafumi / Maesawa, Satoshi / Nishimura, Yusuke / Nagashima, Yoshitaka / Ishizaki, Tomotaka / Mutoh, Manabu / Ito, Yoshiki / Saito, Ryuta

NMC case report journal

2023 Volume 10, Page(s) 15–20

Abstract: Central poststroke pain is a chronic, intractable, central neuropathic pain. Spinal cord stimulation is a neuromodulation therapy for chronic neuropathic pain. The conventional stimulation method induces a sense of paresthesia. Fast-acting subperception ... ...

Abstract	Central poststroke pain is a chronic, intractable, central neuropathic pain. Spinal cord stimulation is a neuromodulation therapy for chronic neuropathic pain. The conventional stimulation method induces a sense of paresthesia. Fast-acting subperception therapy is one of the latest new stimulation methods without paresthesia. A case of achieving pain relief of central poststroke pain affecting both the arm and leg on one side by double-independent dual-lead spinal cord stimulation using fast-acting subperception therapy stimulation is presented. A 67-year-old woman had central poststroke pain due to a right thalamic hemorrhage. The numerical rating scale scores of the left arm and leg were 6 and 7, respectively. Using dual-lead stimulation at the Th 9-11 levels, a spinal cord stimulation trial was performed. Fast-acting subperception therapy stimulation achieved pain reduction in the left leg from 7 to 3. Therefore, a pulse generator was implanted, and the pain relief continued for 6 months. Then, two additional leads were implanted at the C 3-5 levels, and pain in the arm decreased from 6 to 4. Independent setting and adjustments of the dual-lead stimulation were required because the thresholds of paresthesia perception were significantly different. To achieve pain relief in both the arm and leg, double-independent dual-lead stimulation placed at cervical and thoracic levels is an effective treatment. Fast-acting subperception therapy stimulation may be effective for central poststroke pain, especially in cases where the paresthesia is perceived as uncomfortable or the conventional stimulation itself is ineffective.
Language	English
Publishing date	2023-02-09
Publishing country	Japan
Document type	Case Reports
ISSN	2188-4226
ISSN	2188-4226
DOI	10.2176/jns-nmc.2022-0336
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Article ; Online: Postoperative bleeding after percutaneous transhepatic gallbladder drainage and aspiration in patients receiving antithrombotic therapy.

Iwamoto, Takayuki / Suda, Takahiro / Inoue, Takanori / Nozaki, Yasutoshi / Mizumoto, Rui / Arimoto, Yuki / Ohta, Takashi / Yamaguchi, Shinjiro / Ito, Yoshiki / Hagiwara, Hideki

PloS one

2023 Volume 18, Issue 8, Page(s) e0288463

Abstract: This study aimed to investigate the bleeding risk associated with percutaneous transhepatic gallbladder interventions in patients with acute cholecystitis receiving antithrombotic therapy. In this retrospective study, 194 consecutive patients who ... ...

Abstract	This study aimed to investigate the bleeding risk associated with percutaneous transhepatic gallbladder interventions in patients with acute cholecystitis receiving antithrombotic therapy. In this retrospective study, 194 consecutive patients who underwent percutaneous transhepatic gallbladder interventions for acute cholecystitis between April 2011 and April 2021 were enrolled. Patients were sorted into four groups: no prior antithrombotic therapy, discontinued antithrombotic drugs, single antithrombotic drug continued perioperatively, and multiple antithrombotic drugs continued perioperatively. The risk of postoperative bleeding after percutaneous transhepatic gallbladder interventions was evaluated via multivariate logistic regression analysis. Of the 116 (59.8%) patients receiving antithrombotic therapy, 32 (16.5%) discontinued antithrombotic drugs before their respective procedure, 50 (25.8%) continued a single antithrombotic drug, and 34 (17.5%) continued multiple antithrombotic drugs during the perioperative period. The rates of significant and severe bleeding were 10.3% (20/194) and 3.1% (6/194), respectively. The rate of significant bleeding was significantly higher in patients who continued multiple antithrombotic drugs than in patients who received no prior antithrombotic therapy (P = 0.006). In the multivariate logistic regression analysis, the continuation of multiple antithrombotic drugs during the perioperative period was a risk factor for significant bleeding after percutaneous transhepatic gallbladder interventions. In conclusion, the perioperative continuation of multiple antithrombotic drugs is a risk factor for postoperative bleeding after percutaneous transhepatic gallbladder interventions.
MeSH term(s)	Humans ; Fibrinolytic Agents/adverse effects ; Retrospective Studies ; Postoperative Hemorrhage/etiology ; Cholecystitis, Acute ; Drainage
Chemical Substances	Fibrinolytic Agents
Language	English
Publishing date	2023-08-18
Publishing country	United States
Document type	Journal Article
ZDB-ID	2267670-3
ISSN	1932-6203 ; 1932-6203
ISSN (online)	1932-6203
ISSN	1932-6203
DOI	10.1371/journal.pone.0288463
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Article ; Online: Clinical Impacts of Stereotactic Electroencephalography on Epilepsy Surgery and Associated Issues in the Current Situation in Japan.

Maesawa, Satoshi / Ishizaki, Tomotaka / Mutoh, Manabu / Ito, Yoshiki / Torii, Jun / Tanei, Takafumi / Nakatsubo, Daisuke / Saito, Ryuta

Neurologia medico-chirurgica

2023 Volume 63, Issue 5, Page(s) 179–190

Abstract: Stereotactic electroencephalography (SEEG) is receiving increasing attention as a safe and effective technique in the invasive evaluation for epileptogenic zone (EZ) detection. The main clinical question is whether the use of SEEG truly improves outcomes. ...

Abstract	Stereotactic electroencephalography (SEEG) is receiving increasing attention as a safe and effective technique in the invasive evaluation for epileptogenic zone (EZ) detection. The main clinical question is whether the use of SEEG truly improves outcomes. Herein, we compared outcomes in our patients after three types of intracranial EEG (iEEG): SEEG, the subdural electrode (SDE), and a combined method using depth and strip electrodes. We present here our preliminary results from two demonstrative cases. Several international reports from large epilepsy centers found the following clinical advantages of SEEG: 1) three-dimensional analysis of structures, including bilateral and multilobar structures; 2) low rate of complications; 3) less pneumoencephalopathy and less patient burden during postoperative course, which allows the initiation of video-EEG monitoring immediately after implantation and does not require resection to be performed in the same hospitalization; and 4) a higher rate of good seizure control after resection. In other words, SEEG more accurately identified the EZ than the SDE method. We obtained similar results in our preliminary experiences under limited conditions. In Japan, as of August 2022, dedicated electrodes and SEEG accessories have not been approved and the use of the robot arm is not widespread. The Japanese medical community is hopeful that these issues will soon be resolved and that the experience with SEEG in Japan will align with that of large epilepsy centers internationally.
MeSH term(s)	Humans ; Stereotaxic Techniques ; Japan ; Electrodes, Implanted ; Epilepsy/diagnosis ; Epilepsy/surgery ; Electroencephalography/methods
Language	English
Publishing date	2023-03-31
Publishing country	Japan
Document type	Journal Article
ZDB-ID	604061-5
ISSN	1349-8029 ; 0470-8105
ISSN (online)	1349-8029
ISSN	0470-8105
DOI	10.2176/jns-nmc.2022-0271
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Article ; Online: Viability variation of T-cells under ultrasound exposure according to adhesion condition with bubbles.

Kajita, Naoya / Ito, Yoshiki / Watanabe, Shunya / Miyamoto, Yoshitaka / Omata, Daiki / Maruyama, Kazuo / Suzuki, Ryo / Masuda, Kohji

Journal of medical ultrasonics (2001)

2023 Volume 50, Issue 2, Page(s) 121–129

Abstract: Purpose: Although cellular immunotherapy is expected as a new cancer treatment, its therapeutic efficiency is limited in solid tumors, because most cells return to the bloodstream rather than adhere to the target site. Therefore, we are motivated to ... ...

Abstract	Purpose: Although cellular immunotherapy is expected as a new cancer treatment, its therapeutic efficiency is limited in solid tumors, because most cells return to the bloodstream rather than adhere to the target site. Therefore, we are motivated to develop a technique to concentrate the cells in the blood flow using active control of bubble-surrounded cells under ultrasound exposure considering both aspects of cell controllability and viability. Methods: We prepared a lipid bubble conjugating ligand to adhere to the surface of the T-cells. First, we evaluated the cell controllability by retaining the cells on a wall of an artificial blood vessel through continuous ultrasound exposure. Next, we investigated the cell viability under ultrasound exposure in a suspension with various bubble concentrations. Results: We estimated the concentration of bubbles when the adhesion to the cell surface was saturated. Then, we evaluated the cell viability with various conditions of ultrasound exposure and bubble concentrations. However, it was confirmed that cell damage occurred under conditions that achieved proper control of the cells. Therefore, we exposed the cells to burst waves to reduce the applied ultrasound intensity. Consequently, the significant increase in cell viability was confirmed to be inversely proportional to the duty ratio. Conclusion: To retain cells on a vessel wall, determining the appropriate ultrasound condition including sound pressure and waveform is important to maintain cell viability.
MeSH term(s)	Humans ; T-Lymphocytes ; Sound
Language	English
Publishing date	2023-01-12
Publishing country	Japan
Document type	Journal Article
ZDB-ID	1396630-3
ISSN	1613-2254 ; 0287-0592 ; 1346-4523
ISSN (online)	1613-2254
ISSN	0287-0592 ; 1346-4523
DOI	10.1007/s10396-022-01277-5
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