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Article ; Online: In Vitro Analysis of the Efficacy of Endovascular Thrombectomy Techniques according to the Vascular Tortuosity Using 3D Printed Models.

Kim, J H / Kim, B M / Kim, D J

AJNR. American journal of neuroradiology

2022 Volume 43, Issue 10, Page(s) 1431–1436

Abstract: Background and purpose: Achieving complete recanalization with the front-line endovascular thrombectomy device improves the outcome of acute stroke. The aim of this study was to evaluate whether various thrombectomy techniques including contact ... ...

Abstract	Background and purpose: Achieving complete recanalization with the front-line endovascular thrombectomy device improves the outcome of acute stroke. The aim of this study was to evaluate whether various thrombectomy techniques including contact aspiration, stent retriever thrombectomy, and combination therapy differ in first-pass effect and distal emboli in acute large-vessel occlusion simulated using 3D printed nontortuous and tortuous cerebrovascular anatomy models. Materials and methods: 3D printed flow models were manufactured using angiographic data of nontortuous and acutely angulated tortuous vascular anatomy from real patients. Three thrombectomy techniques, contact aspiration, stent retriever, and combined methods, were tested under proximal protection with the balloon-guiding catheter. The first-pass effect and distal emboli rates were analyzed in addition to the thrombectomy-failure mechanisms of the respective techniques. Results: A total of 30 thrombectomy experiments were performed. The overall incidence of first-pass effect in the nontortuous and tortuous anatomy was 80.0% versus 46.7%. The overall incidence of distal emboli in the nontortuous and tortuous anatomy was 26.7% versus 46.7%. The contact aspiration technique showed better first-pass effect (80.0%) and distal emboli rates (20%) in the tortuous model compared with other techniques. The combined technique did not show remarkable superiority of the first-pass effect and distal emboli in either the nontortuous or tortuous anatomy. Shearing off of the thrombus was the main mechanism of thrombectomy failure in the combined group. Conclusions: The tortuous vascular anatomy may worsen the first-pass effect and distal emboli rates. The combined techniques failed to show improvement in outcome due to the shearing-off phenomenon of the thrombus during retrieval.
MeSH term(s)	Humans ; Treatment Outcome ; Thrombectomy/methods ; Stroke ; Thrombosis ; Endovascular Procedures/methods ; Stents ; Printing, Three-Dimensional ; Brain Ischemia
Language	English
Publishing date	2022-09-08
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	603808-6
ISSN	1936-959X ; 0195-6108
ISSN (online)	1936-959X
ISSN	0195-6108
DOI	10.3174/ajnr.A7633
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Article ; Online: Corrigendum to 'Quantitative mapping of strain and displacement fields over HR-TEM and HR-STEM images of crystals with reference to a virtual lattice' Ultramicroscopy 253 (2023) 113778>.

Cherkashin, N / Louiset, A / Chmielewski, A / Kim, D J / Dubourdieu, C / Schamm-Chardon, S

Ultramicroscopy

2023 Volume 254, Page(s) 113801

Language	English
Publishing date	2023-06-26
Publishing country	Netherlands
Document type	Published Erratum
ZDB-ID	1479043-9
ISSN	1879-2723 ; 0304-3991
ISSN (online)	1879-2723
ISSN	0304-3991
DOI	10.1016/j.ultramic.2023.113801
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Article ; Online: Quantitative mapping of strain and displacement fields over HR-TEM and HR-STEM images of crystals with reference to a virtual lattice.

Cherkashin, N / Louiset, A / Chmielewski, A / Kim, D J / Dubourdieu, C / Schamm-Chardon, S

Ultramicroscopy

2023 Volume 253, Page(s) 113778

Abstract: A method for the reciprocal space treatment of high-resolution transmission electron microscopy (HR-TEM) and high-resolution scanning transmission electron microscopy (HR-STEM) images has been developed. Named "Absolute strain" (AbStrain), it allows for ... ...

Abstract	A method for the reciprocal space treatment of high-resolution transmission electron microscopy (HR-TEM) and high-resolution scanning transmission electron microscopy (HR-STEM) images has been developed. Named "Absolute strain" (AbStrain), it allows for quantification and mapping of interplanar distances and angles, displacement fields and strain tensor components with reference to a user-defined Bravais lattice and with their corrections from the image distortions specific to HR-TEM and HR-STEM imaging. We provide the corresponding mathematical formalism. AbStrain goes beyond the restriction of the existing method known as geometric phase analysis by enabling direct analysis of the area of interest without the need for reference lattice fringes of a similar crystal structure on the same field of view. In addition, for the case of a crystal composed of two or more types of atoms, each with its own sub-structure constraint, we developed a method named "Relative displacement" for extracting sub-lattice fringes associated to one type of atom and measuring atomic columns displacements associated to each sub-structure with reference to a Bravais lattice or to another sub-structure. The successful application of AbStrain and Relative displacement to HR-STEM images of functional oxide ferroelectric heterostructures is demonstrated.
Language	English
Publishing date	2023-06-10
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	1479043-9
ISSN	1879-2723 ; 0304-3991
ISSN (online)	1879-2723
ISSN	0304-3991
DOI	10.1016/j.ultramic.2023.113778
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Article ; Online: A parallel input composite transimpedance amplifier.

Kim, D J / Kim, C

The Review of scientific instruments

2018 Volume 89, Issue 1, Page(s) 14705

Abstract: A new approach to high performance current to voltage preamplifier design is presented. The design using multiple operational amplifiers (op-amps) has a parasitic capacitance compensation network and a composite amplifier topology for fast, precision, ... ...

Abstract	A new approach to high performance current to voltage preamplifier design is presented. The design using multiple operational amplifiers (op-amps) has a parasitic capacitance compensation network and a composite amplifier topology for fast, precision, and low noise performance. The input stage consisting of a parallel linked JFET op-amps and a high-speed bipolar junction transistor (BJT) gain stage driving the output in the composite amplifier topology, cooperating with the capacitance compensation feedback network, ensures wide bandwidth stability in the presence of input capacitance above 40 nF. The design is ideal for any two-probe measurement, including high impedance transport and scanning tunneling microscopy measurements.
Language	English
Publishing date	2018-01
Publishing country	United States
Document type	Journal Article
ZDB-ID	209865-9
ISSN	1089-7623 ; 0034-6748
ISSN (online)	1089-7623
ISSN	0034-6748
DOI	10.1063/1.5020050
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Article: Newly emerging human coronaviruses: Animal models and vaccine research for SARS, MERS, and COVID-19

Lee, P. / Kim, D. J.

Immune Network

Abstract: The recent emergence of the novel coronavirus (CoV) or severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) poses a global threat to human health and economy As of June 26, 2020, over 9 4 million cases of infection, including 482,730 deaths, had ... ...

Abstract	The recent emergence of the novel coronavirus (CoV) or severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) poses a global threat to human health and economy As of June 26, 2020, over 9 4 million cases of infection, including 482,730 deaths, had been confirmed across 216 countries To combat a devastating virus pandemic, numerous studies on vaccine development are urgently being accelerated In this review article, we take a brief look at the characteristics of SARS-CoV-2 in comparison to SARS and Middle East respiratory syndrome (MERS)-CoVs and discuss recent approaches to coronavirus disease-2019 (COVID-19) vaccine development
Keywords	covid19
Publisher	WHO
Document type	Article
Note	WHO #Covidence: #742915
Database	COVID19

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Article ; Online: Improved Blood Suppression of Motion-Sensitized Driven Equilibrium in High-Resolution Whole-Brain Vessel Wall Imaging: Comparison of Contrast-Enhanced 3D T1-Weighted FSE with Motion-Sensitized Driven Equilibrium and Delay Alternating with Nutation for Tailored Excitation.

Kim, D J / Lee, H-J / Baik, J / Hwang, M J / Miyoshi, M / Kang, Y

AJNR. American journal of neuroradiology

2022 Volume 43, Issue 12, Page(s) 1713–1718

Abstract: Background and purpose: High-resolution vessel wall MR imaging is prone to slow-flow artifacts, particularly when gadolinium shortens the T1 relaxation time of blood. This study aimed to determine the optimal preparation pulses for contrast-enhanced ... ...

Abstract	Background and purpose: High-resolution vessel wall MR imaging is prone to slow-flow artifacts, particularly when gadolinium shortens the T1 relaxation time of blood. This study aimed to determine the optimal preparation pulses for contrast-enhanced high-resolution vessel wall MR imaging. Materials and methods: Fifty patients who underwent both motion-sensitized driven equilibrium and delay alternating with nutation for tailored excitation (DANTE) preparation pulses with contrast-enhanced 3D-T1-FSE were retrospectively included. Qualitative analysis was performed using a 4-grade visual scoring system for black-blood performance in the small-sized intracranial vessels, overall image quality, severity of artifacts, and the degree of blood suppression in all cortical veins as well as transverse sinuses. Quantitative analysis of the M1 segment of the MCA was also performed. Results: The qualitative analysis revealed that motion-sensitized driven equilibrium demonstrated a significantly higher black-blood score than DANTE in contrast-enhanced 3D-T1-FSE of the A3 segment (3.90 versus 3.58, Conclusions: Motion-sensitized driven equilibrium demonstrated improved blood suppression on contrast-enhanced 3D-T1-FSE in the small intracranial arteries and veins compared with DANTE. Motion-sensitized driven equilibrium is a useful preparation pulse for high-resolution vessel wall MR imaging to decrease venous contamination and suppress slow-flow artifacts when using contrast enhancement.
MeSH term(s)	Humans ; Magnetic Resonance Angiography/methods ; Retrospective Studies ; Signal-To-Noise Ratio ; Magnetic Resonance Imaging/methods ; Brain/blood supply ; Cerebral Veins/diagnostic imaging ; Imaging, Three-Dimensional
Language	English
Publishing date	2022-10-20
Publishing country	United States
Document type	Journal Article
ZDB-ID	603808-6
ISSN	1936-959X ; 0195-6108
ISSN (online)	1936-959X
ISSN	0195-6108
DOI	10.3174/ajnr.A7678
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Article ; Online: Clot Meniscus Sign: An Angiographic Clue for Choosing between Stent Retriever and Contact Aspiration in Acute Basilar Artery Occlusion.

Baik, S H / Jung, C / Kim, B M / Han, K / Kim, D J

AJNR. American journal of neuroradiology

2021 Volume 42, Issue 4, Page(s) 732–737

Abstract: Background and purpose: The efficacy of mechanical thrombectomy methods may differ depending on the characteristics of the occlusion. The purpose of this study was to compare the recanalization efficacy and treatment outcome of a stent retriever versus ... ...

Abstract	Background and purpose: The efficacy of mechanical thrombectomy methods may differ depending on the characteristics of the occlusion. The purpose of this study was to compare the recanalization efficacy and treatment outcome of a stent retriever versus contact aspiration in patients with acute basilar artery occlusion according to the angiographic characteristics of the occlusion. Materials and methods: One hundred sixty-one patients with acute basilar artery occlusion who underwent mechanical thrombectomy were retrospectively analyzed. A stent retriever was compared with contact aspiration thrombectomy according to the clot meniscus sign, defined as a meniscoid/tram-track-like sidewall contrast opacification of the thrombus. A propensity score matching analysis was performed. Clinical/angiographic characteristics and treatment and clinical outcomes were compared. Results: Overall, a stent retriever ( Conclusions: The efficacy of the mechanical thrombectomy techniques may differ according to the angiographic characteristics of occlusion in patients with basilar artery occlusion. Contact aspiration may be more effective in terms of recanalization compared with a stent retriever in patients with the clot meniscus sign.
MeSH term(s)	Basilar Artery ; Humans ; Meniscus ; Retrospective Studies ; Stents ; Stroke ; Thrombectomy ; Thrombosis ; Treatment Outcome
Language	English
Publishing date	2021-02-04
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	603808-6
ISSN	1936-959X ; 0195-6108
ISSN (online)	1936-959X
ISSN	0195-6108
DOI	10.3174/ajnr.A6988
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Article ; Online: Temporal change in the diagnosis and treatment rates of osteoporosis: results from the Korea National Health and Nutrition Examination Survey.

Choi, Y J / Shin, H-B / Park, B / Kim, D J / Chung, Y-S

Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA

2021 Volume 32, Issue 9, Page(s) 1777–1784

Abstract: To compare the diagnosis andtreatment rates of osteoporosis and diabetes in Korea, a nationwide database was used. The results showed that although osteoporosis management is improving, it is still lower compared with that of diabetes; thus, further ... ...

Abstract	To compare the diagnosis andtreatment rates of osteoporosis and diabetes in Korea, a nationwide database was used. The results showed that although osteoporosis management is improving, it is still lower compared with that of diabetes; thus, further efforts are needed in this regard. Introduction: This study aimed to re-evaluate the diagnosis and treatment of osteoporosis from the KNHANES 2016-2017 and compare the temporal change of the rate with those of diabetes as another prevalent chronic disease in South Korea. Methods: The prevalence of osteoporosis in 2016 was estimated using the previous data classified by age groups (50-59,60-69, and ≥70years) and the 2016 Korean census data. The physician diagnosis and treatment rates of osteoporosis in adults aged ≥50years were estimated using the 2016-2017 KNHANES data. The physician diagnosis and treatment rates of diabetes were evaluated using the KNHANES 2008-2009 and 2016-2017 data. Results: The estimated physician diagnosisrate of osteoporosis increased from 29.9% in females and 5.8% in males in 2008-2009 to 62.8% in females and 22.8% in males in 2016-2017. The treatment rate for the estimated total number of patients with osteoporosis increased from 14.4% in females and 3.8% in males in 2008-2009 to 32.2% in females and 9.0% in males in 2016-2017. An increasing trend in the estimated treatment rateof physician-diagnosed osteoporosis patients was not observed (48.3% [2008-2009] vs 51.5% [2016-2017] in females; 42.6% [2008-2009] vs 42.2% [2016-2017] in males). The physician diagnosis and treatment rates of diabetes were considerably better and more stable than those of osteoporosis. Conclusion: Osteoporosis management in South Korea is improving but is insufficient compared with diabetes management. More extensive efforts are needed to improve the diagnosis and treatment rates of osteoporosis.
MeSH term(s)	Adult ; Aged ; Diabetes Mellitus/diagnosis ; Diabetes Mellitus/epidemiology ; Female ; Humans ; Male ; Nutrition Surveys ; Osteoporosis/diagnosis ; Osteoporosis/drug therapy ; Osteoporosis/epidemiology ; Prevalence ; Republic of Korea/epidemiology
Language	English
Publishing date	2021-02-25
Publishing country	England
Document type	Journal Article
ZDB-ID	1064892-6
ISSN	1433-2965 ; 0937-941X
ISSN (online)	1433-2965
ISSN	0937-941X
DOI	10.1007/s00198-021-05864-z
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Article ; Online: Aberrant Brain Signal Variability and COMT Genotype in Chronic TMD Patients.

Lim, M / Nascimento, T D / Kim, D J / Ellingrod, V L / DaSilva, A F

Journal of dental research

2021 Volume 100, Issue 7, Page(s) 714–722

Abstract: The analysis of brain signal variability is a promising approach to understand pathological brain function related to chronic pain. This study investigates whether blood-oxygen-level-dependent signal variability ( ... ...

Abstract	The analysis of brain signal variability is a promising approach to understand pathological brain function related to chronic pain. This study investigates whether blood-oxygen-level-dependent signal variability (BOLD
MeSH term(s)	Brain/diagnostic imaging ; Catechol O-Methyltransferase/genetics ; Genotype ; Humans ; Magnetic Resonance Imaging ; Temporomandibular Joint Disorders/diagnostic imaging ; Temporomandibular Joint Disorders/genetics
Chemical Substances	COMT protein, human (EC 2.1.1.6) ; Catechol O-Methyltransferase (EC 2.1.1.6)
Language	English
Publishing date	2021-02-23
Publishing country	United States
Document type	Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
ZDB-ID	80207-4
ISSN	1544-0591 ; 0022-0345
ISSN (online)	1544-0591
ISSN	0022-0345
DOI	10.1177/0022034521994089
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Article ; Online: Direct generation of an optical vortex beam in a single-frequency Nd:YVO4 laser.

Kim, D J / Kim, J W

Optics letters

2015 Volume 40, Issue 3, Page(s) 399–402

Abstract: A simple method for generating a Laguerre-Gaussian (LG) mode optical vortex beam with well-determined handedness in a single-frequency solid state laser end-pumped by a ring-shaped pump beam is reported. After investigating the intensity profile and the ... ...

Abstract	A simple method for generating a Laguerre-Gaussian (LG) mode optical vortex beam with well-determined handedness in a single-frequency solid state laser end-pumped by a ring-shaped pump beam is reported. After investigating the intensity profile and the wavefront helicity of each longitudinal mode output to understand generation of the LG mode in a Nd:YVO4 laser resonator, selection of the wavefront handedness has been achieved simply by inserting and tilting an etalon in the resonator, which breaks the propagation symmetry of the Poynting vectors with opposite helicity. Simple calculation and the experimental results are discussed for supporting this selection mechanism.
Language	English
Publishing date	2015-02-01
Publishing country	United States
Document type	Journal Article
ISSN	1539-4794
ISSN (online)	1539-4794
DOI	10.1364/OL.40.000399
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