Hak-Sun Kim's research while affiliated with Yonsei University and other places
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Publications (8)
Temporomandibular joint disorders (TMDs) are closely related to the masticatory muscles, but objective and quantitative methods to evaluate muscle are lacking. IDEAL-IQ, a type of chemical shift-encoded magnetic resonance imaging (CSE-MRI), can quantify the fat fraction (FF). The purpose of this study was to develop an MR IDEAL-IQ-based method for...
Objectives:
Lingual mandibular bone depression (LMBD) is a developmental bony defect in the lingual aspect of the mandible that does not require any surgical treatment. It is sometimes confused with a cyst or another radiolucent pathologic lesion on panoramic radiography. Thus, it is important to differentiate LMBD from true pathological radioluce...
Objective
We aimed to develop and assess the clinical usefulness of a generative adversarial network (GAN) model for improving image quality in panoramic radiography.
Methods
Panoramic radiographs obtained at Yonsei University Dental Hospital were randomly selected for study inclusion (n = 100). Datasets with degraded image quality (n = 400) were...
This report presents a rare case where a displaced temporomandibular joint (TMJ) disc was reduced to its normal position after orthognathic surgery, and long-term magnetic resonance imaging (MRI) follow-up visualized these postoperative changes. A 22-year-old male patient presented for facial asymmetry. He also complained of pain in the right TMJ a...
Objectives
: This study compared the clinical usefulness of structured reports (SRs) and free-text reports (FTRs) of lesions depicted on cone beam computed tomography (CBCT) images from the perspectives of report providers and receivers.
Study Design
: In total, 36 CBCT images of jaw lesions obtained between February 2020 and August 2020 were eval...
Purpose:
This study aimed to evaluate the performance of transfer learning in a deep convolutional neural network for classifying implant fixtures.
Materials and methods:
Periapical radiographs of implant fixtures obtained using the Superline (Dentium Co. Ltd., Seoul, Korea), TS III (Osstem Implant Co. Ltd., Seoul, Korea), and Bone Level Implant...
Purpose:
This study aimed to compare the therapeutic effects of corticosteroid irrigations and normal saline irrigations in the early inflammatory state of the salivary gland.
Materials and methods:
Adult male Wistar rats were divided into experimental (n=6) and control (n=3) groups. Inflammation was induced in the experimental subjects on both...
Synovial chondromatosis is a rare metaplastic disease affecting the joints, including the temporomandibular joint (TMJ). Since its symptoms are similar to those of temporomandibular disorders, a careful differential diagnosis is essential. A 50-year-old male patient was referred with the chief complaint of pain and radiopaque masses around the left...
Citations
... Examples include the assessment of root morphology of the mandibular first molar, automatic classification of odontogenic keratocysts and ameloblastomas, differential diagnosis of lingual mandibular bone depression (e.g. Stafne defect) from true pathological radiolucent cysts or tumors, and classification and localization of odontogenic lesions [19][20][21][22]. ...
... The two included studies that applied GANs to improve the resolution of panoramic X-rays, Kim et al., 2023 andMohammad-Rahimi et al., 2023 [33,34] showed promising performance. The first study used a Pix2Pix-GAN model, demonstrating good performance on images with blurring in the anterior tooth region, while the second study used an SR-GAN model, demonstrating in terms of MOS (mean opinion score) significant improvements in resolution compared to the other tools used and compared. ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/693038301073408-1542244615464_Q64/Yoon-Joo-Choi-2.jpg)
... The solutions in the implant brands and types category aim to classify brands and models of implants. Most of the selected papers [85][86][87][88][89][90][91][92][93][94] evaluate the efficacy of CNNs in identifying models of implants in radiographic images, either panoramic or intraoral (periapical). Other scientific works [95,96] compare the performance of clinicians and that of deep learning models in classifying implants. ...
... Depending on the disease progression state, the inflammatory lesion of the salivary gland causes histological changes and shows various signal intensity alterations in MRI compared with other normal glands. Diagnosis of sialadenitis is vital in initiating conservative treatment [16,26,27]. Diagnosis can be challenging if the clinical symptoms are mild and the imaging signal is ambiguous. ...
... 9,23,29e31 Regarding the popcorn calcification type, the shape is actually more similar to a crescent enveloping the mandibular condyle (Figs 2d, 7a, 7b, 7d, 7e) rather than a circle on an axial plane, which is also consistent with a previous report. 32 The reason for this type of calcification forming a crescent shape may be that the involved nodules are conglomerated in an environment where the joint space is narrow and the condyle impacts the calcification formation. ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/279839761289217-1443730406033_Q64/Jin-Woo-Choi-3.jpg)
