Skip to main content

Ja Young Choi

Seoul National University · Medicine

About the Lab

Professor Ja Young Choi's research lab specializes in medical imaging and rehabilitation technologies, focusing on improving diagnostic accuracy and therapeutic outcomes in neurological and musculoskeletal disorders. The lab investigates advanced imaging techniques such as FDG-PET, MRI, and DTI to enhance the detection and characterization of diseases like esophageal cancer and ependymomas, while also developing innovative virtual reality-based rehabilitation systems for pediatric brain injury. A key focus is on optimizing imaging protocols and reducing artifacts in CT and MRI to improve clinical decision-making. The lab also contributes to the development of standardized MRI classification systems for musculoskeletal pathologies, particularly in the knee and spinal cord.

medical imagingvirtual reality rehabilitationMRI artifact reductiondiffusion tensor imagingneurological imaging

Research Overview

Papers
243
Total Citations
4,605
Papers (5y)
34
Primary Field
Medicine

Research Output Trend

Figures are computed from collected data and may differ slightly.

Publications per year (5y)
34total
2022
2023
2024
2025
2026
Citations per year (5y)
173total
20222023202420252026

Selected Papers

15
1
Article|207 citations·2000
Improved detection of individual nodal involvement in squamous cell carcinoma of the esophagus by FDG PET.
Ja Young Choi, K H Lee, Young Mog Shim, Kyung Soo Lee, Jae J. Kim, Sang Eun Kim, Byung‐Tae Kim
PubMed

UNLABELLED: Because both the number and location of metastatic lymph nodes and the N stage influence survival in esophageal cancer, accurate noninvasive evaluation of individual lymph node groups for the presence of metastasis is essential for therapeutic planning. Therefore, we investigated the accuracy of FDG PET for evaluating individual lymph groups in esophageal cancer patients and compared the results with those of CT and endoscopic sonography (ES). METHODS: Sixty-one consecutive patients

SurgeryMedicine
2
Article|88 citations·2020
Virtual reality rehabilitation in children with brain injury: a randomized controlled trial
Ja Young Choi, Sook‐Hee Yi, Lijuan Ao, Xin Tang, Xuan Xu, Dain Shim, Beomki Yoo, Eun Sook Park, Dong‐wook Rha
SJR Q1Developmental Medicine & Child NeurologyOA

AIM: To investigate the efficacy of a virtual reality rehabilitation system of wearable multi-inertial sensors to improve upper-limb function in children with brain injury. METHOD: Eighty children (39 males, 41 females) with brain injury including cerebral palsy aged 3 to 16 years (mean age 5y 8mo, SD 2y 10mo) were assessed as part of a multicentre, single-blind, randomized controlled trial. The intervention group received a 30-minute virtual reality intervention and a 30-minute session of conve

RehabilitationMedicine
3
Article|53 citations·2018
Varying acoustic-phonemic ambiguity reveals that talker normalization is obligatory in speech processing
Ja Young Choi, Elly R. Hu, Tyler K. Perrachione
SJR Q1Attention Perception & PsychophysicsOA
Experimental and Cognitive PsychologyPsychology
4
Article|51 citations·2002
Intracranial and Spinal Ependymomas: Review of MR Images in 61 Patients
Ja‐Young Choi, Kee‐Hyun Chang, In Kyu Yu, Keon Ha Kim, Bae Joo Kwon, Moon Hee Han, In-One Kim
SJR Q1Korean Journal of RadiologyOA

Even though the MR imaging findings of ependymomas vary and are nonspecific, awareness of these findings, and of tumor distribution according to age, is helpful and increases the likelihood of correct preoperative clinical diagnosis.

GeneticsMedicine
5
Article|47 citations·2006
Optimization of Acquisition Parameters of Diffusion-Tensor Magnetic Resonance Imaging in the Spinal Cord
Joon Woo Lee, Jae Hyung Kim, Heung Sik Kang, Jong Sea Lee, Ja‐Young Choi, Jin S. Yeom, Hyun-Jib Kim, Hye Won Chung
SJR Q1Investigative Radiology

Optimal parameters for DTI in the cervical spinal cord included a b-value of 900 seconds/mm, 15 diffusion gradient directions, 5 excitations, and a slice thickness of 4mm.

Radiology, Nuclear Medicine and ImagingMedicine
6
Article|46 citations·2008
Metal Artifact Reduction by the Alteration of Technical Factors in Multidetector Computed Tomography
Sung Gyu Moon, Sung Hwan Hong, Ja‐Young Choi, Woo Sun Jun, Hyun-Guy Kang, Hansoo Kim, Heung Sik Kang
SJR Q3Journal of Computer Assisted Tomography

We could quantitatively measure the metal artifact volume in MDCT by using 3D imaging software. In practice, the results of our study indicate that increasing kilovoltage is more effective for metal artifact reduction than increasing the effective mAs.

Biomedical EngineeringEngineering
7
Article|46 citations·2014
Posterior Medial Meniscus Root Ligament Lesions: MRI Classification and Associated Findings
Ja Young Choi, Eric Y. Chang, Guilherme Moura Cunha, Mónica Tafur, Sheronda Statum, Christine B. Chung
SJR Q1American Journal of Roentgenology

PMMRL lesions are commonly detected in symptomatic patients. We have introduced an MRI classification system. PMMRL lesions are significantly associated with age, medial meniscal tears, medial meniscal extrusion, insertional PMMRL osseous change, regional synovitis, osteoarthritis, insufficiency fracture, and cruciate ligament degeneration.

SurgeryMedicine
8
Article|44 citations·2016
Change in Pulmonary Function after Incentive Spirometer Exercise in Children with Spastic Cerebral Palsy: A Randomized Controlled Study
Ja Young Choi, Dong‐wook Rha, Eun Sook Park
SJR Q2Yonsei Medical JournalOA

PURPOSE: The aim of this study was to investigate the effect of incentive spirometer exercise (ISE) on pulmonary function and maximal phonation time (MPT) in children with spastic cerebral palsy (CP). MATERIALS AND METHODS: Fifty children with CP were randomly assigned to two groups: the experimental group and the control group. Both groups underwent comprehensive rehabilitation therapy. The experimental group underwent additional ISE. The forced vital capacity (FVC), forced expiratory volume at

Speech and HearingHealth Professions
9
Article|41 citations·2015
The Effects of the Severity of Periventricular Leukomalacia on the Neuropsychological Outcomes of Preterm Children
Ja Young Choi, Dong‐wook Rha, Eun Sook Park
SJR Q2Journal of Child NeurologyOA

This study investigates the developmental outcomes of preterm children according to severity of periventricular leukomalacia. One hundred preterm children with periventricular leukomalacia evident on brain magnetic resonance imaging and who had undergone neuropsychologic evaluation were selected. Intellectual disability was noted in 27.8% of the children with mild periventricular leukomalacia, 53.2% with moderate periventricular leukomalacia, and 77.1% with severe periventricular leukomalacia. T

Pediatrics, Perinatology and Child HealthMedicine
10
Article|39 citations·2019
Time and information in perceptual adaptation to speech
Ja Young Choi, Tyler K. Perrachione
SJR Q1CognitionOA
Experimental and Cognitive PsychologyPsychology
11
Article|38 citations·2018
Functional Communication Profiles in Children with Cerebral Palsy in Relation to Gross Motor Function and Manual and Intellectual Ability
Ja Young Choi, Jieun Park, Yoon Seong Choi, Yu-ra Goh, Eun Sook Park
SJR Q2Yonsei Medical JournalOA

Very strong relationships were noted among three communication classification systems that are closely related with intellectual ability. Compared to gross motor function, manual ability seemed more closely related with communication function in these children.

Psychiatry and Mental healthMedicine
12
Article|37 citations·2015
Assessment of the Postoperative Appearance of the Rotator Cuff Tendon Using Serial Sonography After Arthroscopic Repair of a Rotator Cuff Tear
Hye Jin Yoo, Ja Young Choi, Sung Hwan Hong, Yusuhn Kang, Jina Park, Sae Hoon Kim, Heung Sik Kang
SJR Q2Journal of Ultrasound in Medicine

OBJECTIVES: The purpose of this study was to evaluate serial changes in sonographic findings of a rotator cuff tendon after rotator cuff repair. METHODS: Sixty-five arthroscopically repaired rotator cuff tears (43 full-thickness tears and 22 partial-thickness tears) were retrospectively included in this study. Serial sonographic examinations were performed at 5 weeks, 3 months, and 6 months after surgery. The sonographic findings of the repaired tendon were assessed for a recurrent tear, tendon

SurgeryMedicine
13
Article|31 citations·2018
Dynamic spasticity determines hamstring length and knee flexion angle during gait in children with spastic cerebral palsy
Ja Young Choi, Eun Sook Park, Dongho Park, Dong‐wook Rha
SJR Q1Gait & PostureOA
Psychiatry and Mental healthMedicine
14
Article|29 citations·2020
Two-Dimensional Image-Based Screening Tool for Infants with Positional Cranial Deformities: A Machine Learning Approach
Cecilia A. Callejas Pastor, Il‐Young Jung, Shinhye Seo, Soon Bin Kwon, Yunseo Ku, Ja Young Choi
SJR Q2DiagnosticsOA

Positional cranial deformities are relatively common conditions, characterized by asymmetry and changes in skull shape. Although three-dimensional (3D) scanning is the gold standard for diagnosing such deformities, it requires expensive laser scanners and skilled maneuvering. We therefore developed an inexpensive, fast, and convenient screening method to classify cranial deformities in infants, based on single two-dimensional vertex cranial images. In total, 174 measurements from 80 subjects wer

GeneticsBiochemistry, Genetics and Molecular Biology
15
Article|27 citations·2016
Botulinum Toxin Type A Injection for Spastic Equinovarus Foot in Children with Spastic Cerebral Palsy: Effects on Gait and Foot Pressure Distribution
Ja Young Choi, Soo Jin Jung, Dong‐wook Rha, Eun Sook Park
SJR Q2Yonsei Medical JournalOA

PURPOSE: To investigate the effect of intramuscular Botulinum toxin type A (BoNT-A) injection on gait and dynamic foot pressure distribution in children with spastic cerebral palsy (CP) with dynamic equinovarus foot. MATERIALS AND METHODS: Twenty-five legs of 25 children with CP were investigated in this study. BoNT-A was injected into the gastrocnemius (GCM) and tibialis posterior (TP) muscles under the guidance of ultrasonography. The effects of the toxin were clinically assessed using the mod

NeurologyMedicine

Research Areas

SurgeryRheumatologyPsychiatry and Mental healthPulmonary and Respiratory MedicinePathology and Forensic MedicineRadiology, Nuclear Medicine and Imaging

Dive deeper into Ja Young Choi's research on Nubint

Open this lab's papers in the app to read with AI, summarize, and cite in your writing.