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  1. Article ; Online: CT-FFR: Real-World Questions, and the New CAD Imaging Triple Aim.

    Choi, Andrew D

    JACC. Cardiovascular imaging

    2023  Volume 16, Issue 8, Page(s) 1066–1068

    MeSH term(s) Humans ; Fractional Flow Reserve, Myocardial ; Predictive Value of Tests ; Coronary Artery Disease/diagnostic imaging ; Coronary Artery Disease/therapy ; Coronary Stenosis ; Tomography, X-Ray Computed/methods ; Coronary Angiography/methods ; Computed Tomography Angiography/methods
    Language English
    Publishing date 2023-05-31
    Publishing country United States
    Document type Editorial ; Comment
    ZDB-ID 2491503-8
    ISSN 1876-7591 ; 1936-878X
    ISSN (online) 1876-7591
    ISSN 1936-878X
    DOI 10.1016/j.jcmg.2023.03.020
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Vision-Based In-Flight Collision Avoidance Control Based on Background Subtraction Using Embedded System.

    Park, Jeonghwan / Choi, Andrew Jaeyong

    Sensors (Basel, Switzerland)

    2023  Volume 23, Issue 14

    Abstract: The development of high-performance, low-cost unmanned aerial vehicles paired with rapid progress in vision-based perception systems herald a new era of autonomous flight systems with mission-ready capabilities. One of the key features of an autonomous ... ...

    Abstract The development of high-performance, low-cost unmanned aerial vehicles paired with rapid progress in vision-based perception systems herald a new era of autonomous flight systems with mission-ready capabilities. One of the key features of an autonomous UAV is a robust mid-air collision avoidance strategy. This paper proposes a vision-based in-flight collision avoidance system based on background subtraction using an embedded computing system for unmanned aerial vehicles (UAVs). The pipeline of proposed in-flight collision avoidance system is as follows: (i) subtract dynamic background subtraction to remove it and to detect moving objects, (ii) denoise using morphology and binarization methods, (iii) cluster the moving objects and remove noise blobs, using Euclidean clustering, (iv) distinguish independent objects and track the movement using the Kalman filter, and (v) avoid collision, using the proposed decision-making techniques. This work focuses on the design and the demonstration of a vision-based fast-moving object detection and tracking system with decision-making capabilities to perform evasive maneuvers to replace a high-vision system such as event camera. The novelty of our method lies in the motion-compensating moving object detection framework, which accomplishes the task with background subtraction via a two-dimensional transformation approximation. Clustering and tracking algorithms process detection data to track independent objects, and stereo-camera-based distance estimation is conducted to estimate the three-dimensional trajectory, which is then used during decision-making procedures. The examination of the system is conducted with a test quadrotor UAV, and appropriate algorithm parameters for various requirements are deduced.
    Language English
    Publishing date 2023-07-11
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2052857-7
    ISSN 1424-8220 ; 1424-8220
    ISSN (online) 1424-8220
    ISSN 1424-8220
    DOI 10.3390/s23146297
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Profiles of online racism exposure and mental health among Asian, Black, and Latinx emerging adults in the United States.

    Keum, Brian TaeHyuk / Choi, Andrew Young

    International review of psychiatry (Abingdon, England)

    2023  Volume 35, Issue 3-4, Page(s) 310–322

    Abstract: Online racism is a digital social determinant to health inequity and an acute and widespread public health problem. To explore the heterogeneity of online racism exposure within and across race, we latent class modelled this construct among Asian ( ...

    Abstract Online racism is a digital social determinant to health inequity and an acute and widespread public health problem. To explore the heterogeneity of online racism exposure within and across race, we latent class modelled this construct among Asian (
    MeSH term(s) Humans ; Adult ; Female ; United States ; Racism/psychology ; Mental Health ; Black People ; Asian ; Hispanic or Latino/psychology
    Language English
    Publishing date 2023-02-27
    Publishing country England
    Document type Journal Article
    ZDB-ID 1018090-4
    ISSN 1369-1627 ; 0954-0261
    ISSN (online) 1369-1627
    ISSN 0954-0261
    DOI 10.1080/09540261.2023.2180346
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  4. Article ; Online: Becoming an Expert Practitioner: The Lifelong Journey of Education in Cardiovascular Imaging.

    Choi, Andrew D / Blankstein, Ron

    JACC. Cardiovascular imaging

    2021  Volume 14, Issue 8, Page(s) 1594–1597

    MeSH term(s) Humans ; Predictive Value of Tests
    Language English
    Publishing date 2021-04-14
    Publishing country United States
    Document type Editorial ; Research Support, Non-U.S. Gov't ; Comment
    ZDB-ID 2491503-8
    ISSN 1876-7591 ; 1936-878X
    ISSN (online) 1876-7591
    ISSN 1936-878X
    DOI 10.1016/j.jcmg.2021.03.006
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Editorial: Multimodality imaging in cardiomyopathy.

    Hays, Allison G / Choi, Andrew D / Lopez-Mattei, Juan / Mukherjee, Monica

    Frontiers in cardiovascular medicine

    2023  Volume 9, Page(s) 1082023

    Language English
    Publishing date 2023-01-11
    Publishing country Switzerland
    Document type Editorial
    ZDB-ID 2781496-8
    ISSN 2297-055X
    ISSN 2297-055X
    DOI 10.3389/fcvm.2022.1082023
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  6. Article ; Online: External Cervical Resorption: Relationships between Classification, Treatment, and 1-Year Outcome with Evaluation of the Heithersay and Patel Classification Systems.

    DeLuca, Schuyler / Choi, Andrew / Pagni, Sarah / Alon, Elinor

    Journal of endodontics

    2023  Volume 49, Issue 5, Page(s) 469–477

    Abstract: Introduction: The purpose of this study was to identify possible associations between classification, treatment, and 1-year outcome of external cervical resorption (ECR) lesions using the Heithersay and Patel systems. Performance of the Patel 3- ... ...

    Abstract Introduction: The purpose of this study was to identify possible associations between classification, treatment, and 1-year outcome of external cervical resorption (ECR) lesions using the Heithersay and Patel systems. Performance of the Patel 3-dimensional classification system was also evaluated.
    Methods: A chart review identified 142 cases of ECR over a 12-year period. Information regarding demographics, predisposing factors, lesion classification, treatment, and outcomes were collected and analyzed. Inter- and intraobserver reliability analyses were conducted for both classification systems.
    Results: There were 72 cases with at least 1 year of follow up; 70% of these cases survived. Treatment recommendations were correlated with both Heithersay and Patel classification. There were no correlations found between 1-year outcome and either classification or treatment done. The weighted reliability analysis showed substantial agreement in both classification systems for both inter- and intraobserver agreement. There was a significant association between the 2 systems; however, the Heithersay system tended to underestimate the apical extent of the lesion.
    Conclusions: Periodic review of ECR lesions presents as a viable treatment option, at least for 1 year after diagnosis. The Patel 3-dimensional classification system is at least as effective as the Heithersay system and should be used in future ECR prognosis studies. Further long-term outcome assessments are still needed.
    MeSH term(s) Humans ; Tooth Cervix/pathology ; Reproducibility of Results ; Cone-Beam Computed Tomography/methods ; Prognosis ; Outcome Assessment, Health Care ; Root Resorption/diagnostic imaging ; Root Resorption/therapy
    Language English
    Publishing date 2023-03-15
    Publishing country United States
    Document type Journal Article
    ZDB-ID 752412-2
    ISSN 1878-3554 ; 0099-2399
    ISSN (online) 1878-3554
    ISSN 0099-2399
    DOI 10.1016/j.joen.2023.03.005
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  7. Article: COVID-19 Racism, Depressive Symptoms, Drinking to Cope Motives, and Alcohol Use Severity Among Asian American Emerging Adults.

    Keum, Brian TaeHyuk / Choi, Andrew Young

    Emerging adulthood (Print)

    2022  Volume 10, Issue 6, Page(s) 1591–1601

    Abstract: The COVID-19 pandemic has incited widespread anti-Asian racism, which is linked to numerous behavioral health consequences including depressive symptoms. As racism-induced depressive symptoms are linked to coping-related alcohol use and because alcohol- ... ...

    Abstract The COVID-19 pandemic has incited widespread anti-Asian racism, which is linked to numerous behavioral health consequences including depressive symptoms. As racism-induced depressive symptoms are linked to coping-related alcohol use and because alcohol-related problems represent a significant public health concern in this population, we investigated whether COVID-19 racism predicted alcohol use severity through depressive symptoms and drinking to cope motives among Asian American emerging adults (
    Language English
    Publishing date 2022-11-15
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2706250-8
    ISSN 2167-6984 ; 2167-6968
    ISSN (online) 2167-6984
    ISSN 2167-6968
    DOI 10.1177/21676968221117421
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  8. Article ; Online: Allergic Contact Dermatitis to p-tert-Butylphenol-Formaldehyde Resin From the Label Adhesive of an Electrocardiogram Electrode.

    Kellogg, Caitlyn C / Choi, Andrew W / Shaw, Daniel W

    Dermatitis : contact, atopic, occupational, drug

    2022  Volume 33, Issue 1, Page(s) e2–e5

    MeSH term(s) Adhesives/adverse effects ; Dermatitis, Allergic Contact/diagnosis ; Dermatitis, Allergic Contact/etiology ; Dermatitis, Contact/diagnosis ; Dermatitis, Contact/etiology ; Electrocardiography ; Humans ; Male ; Patch Tests ; Resins, Synthetic/adverse effects
    Chemical Substances Adhesives ; Resins, Synthetic ; p-tert-butylphenolformaldehyde resin (25085-50-1)
    Language English
    Publishing date 2022-01-14
    Publishing country United States
    Document type Case Reports ; Journal Article
    ZDB-ID 2144723-8
    ISSN 2162-5220 ; 1532-8163 ; 1710-3568
    ISSN (online) 2162-5220 ; 1532-8163
    ISSN 1710-3568
    DOI 10.1097/DER.0000000000000838
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    Zs.A 3680: Show issues Location:
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  9. Article ; Online: From a priori to evidence and advocacy: The evolving paradigm of CCT competency for structural heart disease.

    Hur, David J / Wang, Dee Dee / Choi, Andrew D

    Journal of cardiovascular computed tomography

    2022  Volume 16, Issue 5, Page(s) 412–414

    MeSH term(s) Aortic Valve/surgery ; Aortic Valve Stenosis/surgery ; Cardiac Catheterization ; Heart Valve Prosthesis ; Heart Valve Prosthesis Implantation ; Humans ; Predictive Value of Tests ; Transcatheter Aortic Valve Replacement ; Treatment Outcome
    Language English
    Publishing date 2022-05-13
    Publishing country United States
    Document type Editorial ; Comment
    ZDB-ID 2394360-9
    ISSN 1876-861X ; 1934-5925
    ISSN (online) 1876-861X
    ISSN 1934-5925
    DOI 10.1016/j.jcct.2022.05.001
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    Zs.A 6761: Show issues Location:
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  10. Article: A programmable powerful and ultra-fast water-driven soft actuator inspired by the mutable collagenous tissue of the sea cucumber

    Choi, Andrew / Han, Hyeonseok / Kim, Dong Sung

    Journal of materials chemistry A. 2021 July 27, v. 9, no. 29

    2021  

    Abstract: The sea cucumber evolved to bear mutable collagenous tissue (MCT) that enables its elastic modulus to change by a factor of 10 within a few seconds. It does this by controlling the amount of chemical regulator released, which can subsequently form or ... ...

    Abstract The sea cucumber evolved to bear mutable collagenous tissue (MCT) that enables its elastic modulus to change by a factor of 10 within a few seconds. It does this by controlling the amount of chemical regulator released, which can subsequently form or break hydrogen bonds within the MCT. Although existing water-driven, self-operating, soft actuators have great potential for soft robotics, they remain fragile and slow; ergo, their range of application remains modest. Inspired by MCT, we introduce a programmable, powerful, and ultra-fast water-driven self-operating soft actuator exerting an actuation force of approximately 2 N with an actuation speed of approximately 3 s⁻¹ in 80 °C water based on the dramatic stiffness alteration of bulk poly(N-isopropylacrylamide) hydrogel. This actuator also exhibits outstanding robustness by preserving its original shape over multiple cycles of highly strained (300%) actuations under harsh environments. A simple modulation of cross-linker concentration with its dimensional adjustment enabled the precise tuning of not only the actuation force but also the actuation speed in a wide range. Thus, the soft robotic gripper was able to perform a myriad of intricate tasks such as capturing a fragile object, acting as a biomedical appliance, and closing a large wound with uniform appropriate forces.
    Keywords Holothuroidea ; hydrogels ; hydrogen ; modulus of elasticity ; robots
    Language English
    Dates of publication 2021-0727
    Size p. 15937-15947.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ZDB-ID 2702232-8
    ISSN 2050-7496 ; 2050-7488
    ISSN (online) 2050-7496
    ISSN 2050-7488
    DOI 10.1039/d1ta02566j
    Database NAL-Catalogue (AGRICOLA)

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