Publications by authors named "Woochul Kim"

This review delves into the advancements in optoelectronic logic gate (OELG) devices, emphasizing their transformative potential in computational technology through the integration of optical and electronic components. OELGs present significant advantages over traditional electronic logic gates, including enhanced processing speed, bandwidth, and energy efficiency. The evolution of OELG architectures from single-device, single-logic systems to more sophisticated multidevice, multilogic, and reconfigurable OELGs is comprehensively explored.

View Article and Find Full Text PDF

Background: Active surveillance (AS) has emerged as a viable management strategy for low-risk papillary thyroid microcarcinoma (PTMC), following pioneering trials at Kuma Hospital and the Cancer Institute Hospital in Japan. Numerous prospective cohort studies have since validated AS as a management option for low-risk PTMC, leading to its inclusion in thyroid cancer guidelines across various countries. From 2016 to 2020, the Multicenter Prospective Cohort Study of Active Surveillance on Papillary Thyroid Microcarcinoma (MAeSTro) enrolled 1,177 patients, providing comprehensive data on PTMC progression, sonographic predictors of progression, quality of life, surgical outcomes, and cost-effectiveness when comparing AS to immediate surgery.

View Article and Find Full Text PDF

True random numbers are essential for ensuring information security and supporting simulations across various industries. With the exponential growth of data driven by advancements in artificial intelligence, robust encryption for communications has become increasingly important. While software-based deterministic random number algorithms are cost-effective and easy to use, they are vulnerable to attacks by powerful supercomputers, highlighting the need for more secure alternatives.

View Article and Find Full Text PDF

2D materials possess weak inter-layer van der Waals bonding, allowing them to exist as different polymorphs depending on the stacking sequence of the layers. Herein, the thermal conductivities of the 2H-NbSe and 2H-3R-NbSe polymorphs by conducting experimental measurements and theoretical analysis are comparatively studied. Owing to its 1.

View Article and Find Full Text PDF

Although wearable devices for continuous monitoring of vital signs have undergone significant advancements, their need for frequent recharging precludes continuous operation, potentially leading to adverse outcomes being overlooked. Additionally, the scattered locations of the sensors hamper wearability. Herein, we present a compact vital-sensing band with uninterrupted power supply designed for continuous monitoring of core body temperature (CBT) and pulse rate.

View Article and Find Full Text PDF

Ion channels, which are key to physiological regulation and drug discovery, control ion flux across membranes, and their dysregulation leads to various diseases. Ca monitoring is crucial for cellular signaling when performing Ca-based assays in ion channel research; these assays are widely utilized in both academic and pharmaceutical contexts for drug screening and pharmacological profiling. However, existing detection methods are limited by slow detection speeds, low throughput, complex processes, and low analyte viability.

View Article and Find Full Text PDF
Article Synopsis
  • The study aimed to develop a four-dimensional (4D) tracking system to accurately locate the Iridium-192 (Ir-192) radiation source used in high-dose rate brachytherapy through time-dependent 3D positioning.
  • The research involved designing a tracking system with six compact detectors and optimizing a diverging collimator, using simulations on the open-source GATE Monte Carlo platform to test its effectiveness.
  • The accuracy of the system was validated through simulations with both a solid phantom and patient data, showing an average Euclidean distance error of approximately 1.146 mm in phantom simulations and 0.586 mm in patient data, indicating promising localization capabilities.
View Article and Find Full Text PDF

Purpose: Bilateral axillo-breast approach robotic parathyroidectomy (BABA-RP) aims to remove overactive or enlarged parathyroid glands with no visible neck collar incision. In this study, we compared the safety and surgical outcomes of BABA-RP those of an open surgery group to ascertain whether BABA-RP is a safe and feasible surgical approach for patients with primary hyperparathyroidism (pHPT).

Methods: This single-institution retrospective cohort study included 74 patients with primary HPT who underwent open parathyroidectomy (n = 37) or BABA-RP (n = 37) at our institution between November 2014 and March 2023.

View Article and Find Full Text PDF

Purpose: This study aimed to investigate the effectiveness of a novel wound protector in enhancing the cosmetic outcomes of thyroidectomy.

Material And Methods: This multicenter, double-blinded randomized controlled trial enrolled 129 patients undergoing open thyroidectomy. The patients were divided into a wound protector group and a control group.

View Article and Find Full Text PDF

Selective spectral discrimination of visible and near-infrared light, which accurately distinguishes different light wavelengths, holds considerable promise in various fields, such as automobiles, defense, and environmental monitoring. However, conventional imaging technologies suffer from various issues, including insufficient spatial optimization, low definition, and optical loss. Herein, a groundbreaking advancement is demonstrated in the form of a dual-band photodiode with distinct near-infrared- and visible-light discrimination obtained via simple voltage control.

View Article and Find Full Text PDF

Background: This study investigated the prevalence and subtype distribution of circulating tumor cells (CTCs) in patients with papillary thyroid cancer (PTC) before and after thyroidectomy to determine the potential of CTC count as a noninvasive marker of the efficacy of surgical treatment in PTC.

Materials And Methods: Between January 2021 and January 2022, 62 PTC patients who underwent thyroidectomy at Seoul National University Bundang Hospital were prospectively evaluated. Peripheral blood samples (7.

View Article and Find Full Text PDF

Thyroidectomy in Graves' disease can be challenging due to greater thyroid size and vascularity. While thyroid stimulating hormone receptor antibody (TRAb) level is associated with disease severity and thyroid vascularity, its impact on operative outcomes remains unclear. This study aimed to compare challenging factors for robotic thyroidectomy (RT) and open thyroidectomy (OT) in Graves' disease patients, including TRAb as a predictive factor for difficult thyroidectomy.

View Article and Find Full Text PDF
Article Synopsis
  • Current clinical practices are shifting towards less or no TSH suppression for low- to intermediate-risk thyroid cancer patients after thyroid lobectomy, but the impact on health-related quality of life (HR-QoL) is not well understood.
  • A randomized controlled study compared two groups of patients based on TSH suppression levels, measuring HR-QoL and depression symptoms before and after surgery.
  • Results indicated that while overall HR-QoL scores were similar, those with higher TSH levels reported better physical HR-QoL three months postoperatively, highlighting the need to prioritize HR-QoL in treatment decisions.
View Article and Find Full Text PDF

Purpose: As thyroid cancer patients are experiencing longer disease-free survival periods, evaluating their quality of life after surgery has become crucial. However, studies on this topic have primarily focused on Western populations, leaving a gap in understanding the Korean patient population's experiences and needs. This study aims to address this gap and provide insights into the quality of life of thyroid cancer patients in Korea.

View Article and Find Full Text PDF
Article Synopsis
  • - Current guidelines suggest starting NSCLC treatment with chemotherapy for patients with multiple metastases, avoiding whole-brain radiotherapy (WBRT) initially, even if there are brain metastases present.
  • - This study analyzed the survival impact of WBRT combined with chemotherapy in NSCLC patients who were negative for EGFR, ALK, and PD-L1, had an ECOG performance status of 2, and exhibited multiple metastases, including in the brain.
  • - Results revealed that patients receiving WBRT along with platinum-based chemotherapy had significantly better intracranial progression-free survival (iPFS) and overall survival (OS) compared to those who received chemotherapy alone, suggesting WBRT can improve outcomes in this patient group. *
View Article and Find Full Text PDF

Differentiated high-grade thyroid carcinoma (DHGTC) is a new entity in the 2022 WHO classification. We aimed to investigate the incidence and clinicopathological features of differentiated HG thyroid carcinoma (DHGTC) and compare the clinicopathological parameters of DHGTC, DTC without HG features, and poorly differentiated thyroid carcinoma (PDTC). A total of 1069 DTCs including papillary thyroid carcinomas (PTCs) and follicular thyroid carcinomas (FTCs) were included in this study.

View Article and Find Full Text PDF

Metallic nanogaps have emerged as a versatile platform for realizing ultrastrong coupling in terahertz frequencies. Increasing the coupling strength generally involved reducing the gap width to minimize the mode volume, which presents challenges in fabrication and efficient material coupling. Here, we propose employing terahertz nanoslots, which can efficiently squeeze the mode volume in an extra dimension alongside the gap width.

View Article and Find Full Text PDF

Core body temperature (CBT) is one of the four vital signs that must be monitored continuously. The continuous recording of CBT is possible through invasive methods by inserting a temperature probe into specific body sites. We report a novel method to monitor CBT through the quantitative measurement of skin blood perfusion rate (ω).

View Article and Find Full Text PDF

Purpose: Robotic thyroid surgeries have cosmetic advantages over open surgeries, which are especially important in pediatric patients due to social stigmas from neck scars. The present study describes outcomes in a series of children who underwent bilateral axillo-breast approach (BABA) robotic thyroidectomy.

Methods: Pediatric patients aged ≤18 years who underwent BABA robotic thyroidectomy between 2014 and 2022 were retrospectively reviewed.

View Article and Find Full Text PDF

Introduction: BMI has been shown to predict perioperative outcomes in patients undergoing surgery. Most studies assessing the role of body habitus in thyroid surgery have focused on open surgery, with few studies assessing patients undergoing robotic surgery. The present study evaluated the effects of BMI on surgical outcomes in patients undergoing bilateral axillo-breast approach (BABA) robotic thyroidectomy.

View Article and Find Full Text PDF

Background: Skin metastasis from papillary thyroid cancer (PTC) is a rare entity that can occur up to decades after treatment of the primary tumor. Here, we present a patient who developed skin metastasis 10 years after treatment of her primary tumor and describe the molecular findings of the metastatic lesion.

Case Presentation: A 44-year-old female with a history of PTC who underwent a total thyroidectomy and radioactive iodine (RAI) treatment 10 years ago presented with a 1.

View Article and Find Full Text PDF

Robotic thyroid surgeries in children are gaining popularity due to cosmetic advantages, but most previous studies include patients of school-age or older. We hereby introduce our case of a 5-year-old patient with Graves' disease to show key differences and similarities between pediatric and adult bilateral axillo-breast approach (BABA) robotic thyroidectomies. Despite the small body, no additional working space was needed and the flap creation was performed as similarly done in adults.

View Article and Find Full Text PDF
Article Synopsis
  • * Researchers analyzed data from 424 patients with 2- to 4-cm PTCs who underwent thyroid surgery between 2015 and 2020, discovering that 57.5% showed at least one high-risk characteristic, even when preoperative assessments indicated low risk.
  • * The findings highlight that many patients who seemed eligible for lobectomy based on prior imaging ended up having significant high-risk features, indicating the need for careful patient selection and counseling
View Article and Find Full Text PDF

Lateral neck lymph node dissection (LND) along with total thyroidectomy is the standard treatment for thyroid cancer patients with metastases to the lateral neck lymph nodes. In general, lateral neck LND removes lymph nodes located at levels II to V ipsilateral to the thyroid cancer and preserves the spinal accessory nerve, internal jugular vein, and sternomastoid muscle during surgery. This video article was written to introduce the robotic bilateral axillo-breast approach for lateral neck LND and to describe the surgical method.

View Article and Find Full Text PDF