Joon Ho Choi

ORCID: 0000-0003-0392-9838
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About
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Research Areas
  • Radiomics and Machine Learning in Medical Imaging
  • Medical Imaging Techniques and Applications
  • Intracranial Aneurysms: Treatment and Complications
  • Cerebrovascular and Carotid Artery Diseases
  • Vascular Malformations Diagnosis and Treatment
  • MRI in cancer diagnosis
  • Sarcoma Diagnosis and Treatment
  • Traumatic Brain Injury and Neurovascular Disturbances
  • Thyroid Cancer Diagnosis and Treatment
  • Cardiac Imaging and Diagnostics
  • Radiopharmaceutical Chemistry and Applications
  • Advanced MRI Techniques and Applications
  • Cardiovascular Function and Risk Factors
  • Lymphoma Diagnosis and Treatment
  • Vascular Procedures and Complications
  • Health and Well-being Studies
  • Advanced Neuroimaging Techniques and Applications
  • Cancer Diagnosis and Treatment
  • Radiation Dose and Imaging
  • Acute Ischemic Stroke Management
  • Colorectal Cancer Treatments and Studies
  • Bone Tumor Diagnosis and Treatments
  • Moyamoya disease diagnosis and treatment
  • Optimism, Hope, and Well-being
  • Musculoskeletal synovial abnormalities and treatments

University of Ulsan
2013-2025

Asan Medical Center
2013-2025

Ulsan College
2013-2025

Hanyang University Medical Center
2025

Inje University Haeundae Paik Hospital
2025

Bucheon University
2022-2024

Soonchunhyang University Hospital
2024

Soonchunhyang University
2010-2024

Korea Institute of Radiological and Medical Sciences
2015-2019

Seoul Veterans Hospital
2017-2018

Abstract This study aimed to investigate the predictive efficacy of positron emission tomography/computed tomography (PET/CT) and magnetic resonance imaging (MRI) for pathological response advanced breast cancer neoadjuvant chemotherapy (NAC). The PET/MRI image deep learning model was introduced compared with conventional methods. PET/CT MRI parameters were evaluated before after first NAC cycle in patients [n = 56; all women; median age, 49 (range 26–66) years]. maximum standardized uptake...

10.1038/s41598-020-77875-5 article EN cc-by Scientific Reports 2020-12-03

<h3>ABSTRACT</h3> <h3>BACKGROUND AND PURPOSE:</h3> The guided angiography system, an integrated enables continuous guidance and flushing during diagnostic procedures. A guidewire provides by remaining inside the catheter contrast injection into tortuous vessels. While its feasibility was demonstrated in a retrospective study, this randomized controlled trial aims to evaluate safety effectiveness. <h3>MATERIALS METHODS:</h3> This single-center, single-blind, conducted from September 2021 June...

10.3174/ajnr.a8700 article EN American Journal of Neuroradiology 2025-02-14

Hearing loss is the most important modifiable risk factor for cognitive impairment; however, association of hearing with anatomical and functional connectivity not fully understood. This may be elucidated by evaluating findings newer imaging technologies.

10.1001/jamaoto.2023.0824 article EN JAMA Otolaryngology–Head & Neck Surgery 2023-05-11

Two patients complained of blurred vision approximately 6 months after having combined vitrectomy and phacoemulsification with implantation a C-flex 570C hydrophilic acrylic intraocular lens (IOL). Multiple granules were noted on the anterior surface IOLs in both patients. Intraocular exchange was performed eyes, explanted sent for histopathological analysis. Scanning electron microscopy confirmed presence cracks IOL surfaces energy-dispersive x-ray spectroscopy demonstrated calcium...

10.1016/j.jcrs.2009.08.045 article EN Journal of Cataract & Refractive Surgery 2010-04-01

Abstract 123 I‐FP‐CIT and 18 F‐FP‐CIT are radiotracers which widely used to diagnose Parkinson's disease (PD). However, our knowledge, no studies date have made head‐to‐head comparisons between F‐FP‐CIT. Therefore, in this study, SPECT/CT was compared with PET/CT the same cohort of subjects. Patients PD essential tremor (ET) underwent PET/CT. Visual semiquantitative analyses were conducted. The specific binding ratio (SBR) putamen caudate (PCR) subjects who analysis showed that striatal...

10.1002/syn.22032 article EN Synapse 2018-02-27

Wild-type p53-induced phosphatase 1 (Wip1) is a p53-inducible serine/threonine that switches off DNA damage checkpoint responses by the dephosphorylation of certain proteins (i.e. p38 mitogen-activated protein kinase, p53, kinase 1, 2, and uracil glycosylase) involved in repair cell cycle checkpoint. Emerging data indicate Wip1 amplified or overexpressed various human tumors, its detection implies poor prognosis. In this study, we show interacts with dephosphorylates BAX to suppress...

10.1038/cddis.2013.252 article EN cc-by Cell Death and Disease 2013-08-01

This study investigated the mental health status, self-esteem, social comparison, and narcissism among medical school students. In addition, mediational effect of comparison between self-esteem was also tested with regard to whether students compared themselves others enhance their own self-esteem.Data were collected from 427 at a in Seoul. The questionnaire included Minnesota Multiphasic Personality Inventory (MMPI) 383 scale, Iowa-Netherlands Comparison Orientation Measure, scale. Using...

10.3946/kjme.2011.23.4.295 article EN cc-by-nc Korean journal of medical education 2011-12-09

To determine the minimum required guiding catheter length for embolization of various intracranial aneurysms in anterior circulation and to analyze effect patient factors on potential interaction with its stability.From December 2016 March 2017, 90 patients 93 were enrolled. Three types catheters (Envoy, Envoy DA, DA XB; Codman Neurovascular, Raynham, MA, USA) used. We measured in-the-body checked tip location carotid artery. analyzed affecting stability system.The average (±standard...

10.5469/neuroint.2017.12.2.91 article EN cc-by-nc Neurointervention 2017-09-22

We have used a contrast injection scheme termed as "guided catheterization method (guided method)." By using large-bore 5-Fr catheter and 0.032-in guidewire, medium could be injected without removing the guidewire. Using neurovascular phantom, we studied influence of leaving guidewire on pressure. Image quality was compared with that obtained 4-Fr regular angiography (conventional method).Actual pressure, flow rate, volume, several variables from time-density curve (TDC) were guided...

10.1177/1591019920980876 article EN Interventional Neuroradiology 2020-12-13

Background Sodium-glucose co-transporter 2 inhibitors reduce the risk of cardiovascular events in type diabetic patients with coronary artery disease (CAD); however, underlying mechanisms remain unclear. Objectives We compared effects empagliflozin vs. sitagliptin therapy on myocardial perfusion reserve (MPR) using dynamic single-photon emission computed tomography (SPECT) imaging. Methods In total, 100 diabetes, CAD and an MPR &lt;2.5 were randomized to receive either (10 mg once daily) or...

10.1097/mnm.0000000000001429 article EN Nuclear Medicine Communications 2021-05-19

To compare the embolization effects of a non-fibered pushable coil with conventional fibered in an vitro bench-top experiment.

10.5469/neuroint.2024.00031 article EN cc-by-nc Neurointervention 2024-02-20

There is a paucity of study to examine the relationship between metformin use and hepatocellular carcinoma (HCC) specific survival or recurrence. We, therefore, conducted nationwide population-based in patients with HCC who underwent curative resection investigate whether would reduce mortality recurrence rate. The population initially included 105,367 adults had primary diagnosis (International Classification Diseases, 10th revision, C22) from Korea Center Cancer Registry 1 January 2005 31...

10.1016/j.jval.2015.09.1076 article EN publisher-specific-oa Value in Health 2015-10-20

Purpose: The purpose of this study is to evaluate the association between an accessory renal artery (ARA) and axis seen on radiographs. Materials Methods: MDCT axial images 428 patients were used detect presence ARA its location. plain radiographs measure angle, which was angle longitudinal spinal axis. We correlated these results determine Results: Of 856 kidneys (428 patients), 19 had in upper pole, 63 hilum 20 lower pole. mean angles three groups 16.7 degrees, 15.9 degrees 11.2...

10.3348/jksr.2010.62.3.263 article EN cc-by-nc Journal of the Korean Society of Radiology 2010-01-01
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