JungHun Choi is an Assistant Professor in the Department of Engineering at the Georgia Southern University.
Areas of Expertise (3)
Colonscopy-Related Medical Devices
Virginia Tech: Ph.D.
Test system and method for determining thermal effects of tissue ablation on an ex vivo tissue
2016 A test system and method for determining thermal effects of tissue ablation on an ex vivo tissue includes a power generator, a grounding patch, and a material block configured to emulate an electrical property of a patient. The power generator electrically connects to an electrode to generate an electrical current in the electrode. The grounding patch electrically connects to the power generator, and the material block electrically connects to the grounding patch. Furthermore, the material block includes an ex vivo tissue patch configured to emulate an in vivo tissue of the patient. As such, selectively engaging the electrode to the ex vivo tissue patch electrically connects the electrode to the grounding patch through the material block for electrocauterizing the ex vivo tissue patch.
Byung Ho Choi, Jung Min Kim, Youn Ho Shin, Gyungcheol Choi, Jung Hun Choi
2016 A bioelectrical impedance analyzer is a simple and proven technology in body composition measurements. Due to the recent demand for portable health care devices that can be linked with variable mobile devices, there are many bioimpedance-related products that have been developed. Since the body composition is one of the standard indicators for a person's health and performance, the continuous and long-term monitoring of the body composition is very beneficial to live a quality life and to save health care costs. In this study, four bioimpedance analyzers were used, and the results regarding the measurement accuracy were discussed. An eight-point bioimpedance analyzer was selected as a reference device, and three portable bioimpedance analyzers were compared for body fat percentage (BFP).
Corey D Sheerer, David Drozek, Junghun Choi
2015 Colorectal cancer is the third most common and fourth deadliest cancer in the world , with an estimated 96,000 new cases of colon cancer, 40,000 new cases of rectal cancer, and 50,000 deaths from these diseases in the US alone (2014). Colonoscopy is recognized as the gold standard for detection and removal of polyps within the colon; however, the quality of the procedure relies on the skill and experience of the physician . This quality can be compromised due to inexperienced physicians, as well as experienced physicians forming fatigue injuries.
Kaiqiang Liu, Corey D Sheerer, Junghun Choi
2014 Colonoscopy is one of the most commonly utilized methods for detection and diagnosis of colorectal diseases, including colorectal cancer, which has the second highest number of cancer deaths in the United States . A conventional colonoscope is used in colonoscopies for the detection colorectal conditions. It consists of a shaft and a distal tip that can be manipulated by the colonoscopist to bend in order to navigate turns in the colon.
Hussein Al-Jebur, Choi JungHun
2014 Many researchers have tried to develop a device to reduce the contamination during endoscopy processes. A disposable-sheath system was developed to eliminate the contamination during the flexible gastroscopy process  and the bronchoscopy process . The irrigation-suction straw sheath system was designed for endoscopic sinus surgery in rhinology due to limited vision, which is caused by the bone dust or blood inside the nose during endonasal process . To avoid contact and minimize contamination between the patient and the bronchoscopist, the single-use sheath was developed . After each bronchoscopy procedure, the installation tube was changed instead of the contaminated sheathed bronchoscope by reapplying the vacuum .
Journal of Medical Devices
2014 Colon diseases cause various health problems, such as rectal bleeding, inflammatory bowel diseases, vomiting, and diarrhea . Colon cancer is one of the most dangerous colorectal cancers. It is considered the second most deadly cancer in the United States . One of the methods to treat colon cancer and reduce mortality rate caused by colon cancer is early diagnosis [1, 3]. Furthermore, people aged 50 and above are recommended to undergo colonoscopies periodically every 10 years . Colonoscopy is a standard procedure and the most common method to diagnose and treat colorectal diseases [1, 3, 5]. Therefore, any incomplete colonoscopy could cause an inaccurate diagnosis, which can put the patient at high risk .