26
|
Lee S, Park J, Kwak J, Lee S. Quantitative stiffness measurement of structures in carpal tunnel according to motion of wrist and fingers using acoustic radiation force impulse (ARFI) elastography. Ann Phys Rehabil Med 2018. [DOI: 10.1016/j.rehab.2018.05.324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
27
|
Lee C, Kim C, Kwak J, Song H, Back G. EP-2075: Evaluation of image fusion for computed tomography of head and neck patients with dental implants. Radiother Oncol 2018. [DOI: 10.1016/s0167-8140(18)32384-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
28
|
Yoon K, Cho B, Kwak J, Lee D, Kwon D, Ahn S, Lee S, Kim C, Roh S, Cho Y. Optimization of Robotic Radiosurgery Dosimetric Planning Using a Dose-Limiting Auto-Shell Method for Brain Metastases. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.2393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
29
|
Kwak J. AGING NETWORK MANAGED LONG-TERM CARE, DOES IT HAVE A FUTURE? Innov Aging 2017. [DOI: 10.1093/geroni/igx004.3606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
30
|
Yhim H, Park Y, Han Y, Choi J, Moon J, Shin H, Kim D, Lee W, Lee J, Do Y, Kim M, Choi Y, Kwak J, Yang D. RISK STRATIFICATION BASED ON NCCN-IPI AT THE TIME OF DIAGNOSIS IN COMBINATION WITH POST-TREATMENT PET-CT SCAN FOR THE TREATMENT OF NODAL PERIPHERAL T-CELL LYMPHOMA. Hematol Oncol 2017. [DOI: 10.1002/hon.2438_107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
31
|
Park MH, Kim S, Hwang H, Park H, Kwak J, Kwon EK, Sung HY, Han B. Positive Rates of Preliminary Crossmatches Among Transplantation Candidates Waitlisted for Different Organs in the Korean Network for Organ Sharing. Transplant Proc 2017; 48:2464-2466. [PMID: 27742323 DOI: 10.1016/j.transproceed.2016.02.086] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Accepted: 02/02/2016] [Indexed: 10/20/2022]
Abstract
OBJECTIVE For deceased-donor organ transplantations, negative T cell crossmatches (XMs) are mandatory for kidney and pancreas allocation in the Korean Network for Organ Sharing (KONOS) organ allocation system. Submission and periodic renewal of serum to the KONOS is required for all transplantation candidates of kidney or pancreas and these sera are distributed to 23 laboratories for preliminary XMs. We have investigated how sensitization status varies among transplantation candidates waitlisted for different organs. METHODS Positive rates of T cell XMs performed during recent 1-year period (from March 2014 to February 2015) in the Korea Organ Donation Agency laboratory have been analyzed according to different organs. For 163 cases of deceased donors, 3605 recipients (22.1 recipients per one donor) were crossmatched using both of National Institutes of Health and antihuman globulin complement-dependent cytotoxicity (CDC) methods and flow cytometry method. RESULTS T cell XM positive rates varied among transplantation candidates for different organs. The positive rate was high for kidney (485/3,145, 15.4%), and low for pancreas or kidney/pancreas (7/200, 3.5%), lung (0/41, 0%), and heart (11/221, 5.0%). Among XM-positive individuals, nearly two-thirds of the kidney transplantation candidates showed strong sensitization status with CDC+/flow+ results (64.5%), whereas pancreas or kidney/pancreas transplantation candidates more commonly showed weaker sensitization status with CDC-/flow+ results (85.7%). CONCLUSION Kidney transplantation candidates show a much higher positive rate and stronger sensitization status than candidates for other organs. The results of this study would be useful for determining the number of candidates to be crossmatched for different organs.
Collapse
|
32
|
Yoon K, Cho B, Kwak J, Lee D, Kwon D, Ahn S, Lee S, Kim C, Roh S, Cho Y. SU-F-P-60: Optimization of Cyberknife Treatment Planning Using a Dose-Limiting Auto-Shells Method for Brain Metastases. Med Phys 2016. [DOI: 10.1118/1.4955768] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
33
|
Choi Y, Kwak J, Jeong C, Ahn S, Lee S, Cho B. SU-F-T-460: Dosimetric Matching Between Trilogy Tx and TrueBeam STx. Med Phys 2016. [DOI: 10.1118/1.4956645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
34
|
Chang K, Kim M, Kwak J, Kim S, Ji Y, Cho B, Yoon S, Lee S. SU-F-T-580: New Tumor Modeling Using 3D Gel Dosimeter for Brain Stereoctactic Radiotherpy (SRT). Med Phys 2016. [DOI: 10.1118/1.4956765] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
35
|
Jung N, Kwak J, Lee S. Near Target Normal Tissue Dose Reduction in Radiation Therapy Using Local Magnetic Field: A Phantom Study. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.2044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
36
|
Yoon K, Kwak J, Cho B, Song S, Lee S, Ahn S. Dosimetric Verification of Respiratory Gated VMAT for Lung SBRT Using 3-D Printed Lung Phantom. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.1951] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
37
|
Jeong C, Kwak J, Ahn S, Kim J, Park J, Yoon S, Cho B. SU-E-T-178: Clinical Feasibility of Multi-Leaf Collimator Based Dynamic Wedge. Med Phys 2015. [DOI: 10.1118/1.4924539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
38
|
Jeang E, Lim Y, Cho K, Hwang U, Kwak J, Choi S, Jeong J, Kim H, Kim S, Lee S, Shin D, Park J, Kim J. SU-E-T-257: Development of a New Endorectal Balloon with An Unfoldable Radiochromic Film for In-Vivo Rectal Dosimetry During Prostate Cancer Radiotherapy. Med Phys 2015. [DOI: 10.1118/1.4924619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
39
|
Jung N, Kwak J, Lee S. EP-1308: Normal tissue dose reduction by in-body electron modulation, using local magnetic field. Radiother Oncol 2015. [DOI: 10.1016/s0167-8140(15)41300-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
40
|
Xu S, Amalou H, Kwak J, Lynch T, Agarwal H, Turkbey B, Pinto P, Choyke P, Wood B. Fusion guidance system with ablate-able phantom for prostate laser ablation. J Vasc Interv Radiol 2015. [DOI: 10.1016/j.jvir.2014.12.321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
|
41
|
Shen J, Velasco O, Khadarian K, Asatrian G, Hwang A, Zhang Y, Kwak J, Chirag Chawan, Khalilinejad K, Ajalat M, Pritchard T, Zhang X, W James A, Soo C. A mouse femoral defect model demonstrates the clinically relevant side effects of BMP-2. ACTA ACUST UNITED AC 2015. [DOI: 10.17554/j.issn.2311-5106.2015.02.94] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
42
|
Jeong Y, Lee S, Kwak J, Cho I, Yoon S, Kim J, Park J, Choi E, Song S, Kim Y, Kim S, Joo J, Ahn S. A Dosimetric Comparison of Volumetric Modulated Arc Therapy (VMAT) and Non-Coplanar Intensity Modulated Radiation Therapy (IMRT) for Nasal Cavity and Paranasal Sinus Cancer. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.2472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
43
|
Yoon K, Cho I, Kwak J, Cho B, Kim Y, Ahn S, Lee S. Evaluation of CBCT-Based Dose Calculation in an Enhanced CBCT System. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.2462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
44
|
Hwang U, Lim Y, Choi S, Kwak J, Yoon K, Cho K, Jeong C, Kim M, Jeong J, Park J, Shin D, Lee S, Kim J, Park S, Kim S. SU-E-T-484: A New Method of Aligning Patient Setup Lasers in Radiation Therapy. Med Phys 2014. [DOI: 10.1118/1.4888817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
45
|
KO Y, Cho B, Yi B, Kwak J, Song S, Je H, Ahn S, Noh Y. SU-E-T-185: Feasibility Study of Dose Rate Modulated Arc Therapy (DrMAT) for Lung SBRT. Med Phys 2014. [DOI: 10.1118/1.4888515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
46
|
Choi Y, Cho B, Kwak J, Ahn S, Choi E, Kim J, Song S, Yoon S, Kim Y, Kim S, Park J. SU-E-T-269: Quality Assurance of Spine Volumetric Modulated Arc Therapy with Flattening Filter Free Beams Using Gafchromic EBT3 Films. Med Phys 2014. [DOI: 10.1118/1.4888600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
47
|
Yoon K, Kwak J, Cho B, Lee D, Ahn S. SU-E-T-104: Development of 3 Dimensional Dosimetry System for Gamma Knife. Med Phys 2014. [DOI: 10.1118/1.4888434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
48
|
Kwak J, Zara JN, Chiang M, Ngo R, Shen J, James AW, Le KM, Moon C, Zhang X, Gou Z, Ting K, Soo C. NELL-1 injection maintains long-bone quantity and quality in an ovariectomy-induced osteoporotic senile rat model. Tissue Eng Part A 2013; 19:426-36. [PMID: 23083222 PMCID: PMC3542871 DOI: 10.1089/ten.tea.2012.0042] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2012] [Accepted: 08/24/2012] [Indexed: 02/02/2023] Open
Abstract
Over 10 million Americans have osteoporosis, and is the predominant cause of fractures in the elderly. Treatment of fractures in the setting of osteoporosis is complicated by a suboptimal bone regenerative response due to a decline in the number of osteoblasts, their function, and survival. Consequently, an osteogenic therapeutic to prevent and treat fractures in patients with osteoporosis is needed. Nel-like molecule-1 (NELL-1), a novel osteoinductive growth factor, has been shown to promote bone regeneration. In this study, we aim to demonstrate the capacity of recombinant NELL-1 to prevent ovariectomy (OVX)-induced osteoporosis in a senile rat model. Ten-month-old female Sprague-Dawley rats underwent either sham surgery or OVX. Subsequently, 50 μL of 600 μg/mL NELL-1 lyophilized onto a 0-50-μm tricalcium phosphate (TCP) carrier was injected into the femoral bone marrow cavity while phosphate-buffered saline (PBS) control was injected into the contralateral femur. Our microcomputed tomography results showed that OVX+PBS/TCP control femurs showed a continuous decrease in the bone volume (BV) and bone mineral density (BMD) from 2 to 8 weeks post-OVX. In contrast, OVX+NELL-1/TCP femurs showed resistance to OVX-induced bone resorption showing BV and BMD levels similar to that of SHAM femurs at 8 weeks post-OVX. Histology showed increased endosteal-woven bone, as well as decreased adipocytes in the bone marrow of NELL-1-treated femurs compared to control. NELL-1-treated femurs also showed increased immunostaining for bone differentiation markers osteopontin and osteocalcin. These findings were validated in vitro, in which addition of NELL-1 in OVX bone marrow stem cells resulted in increased osteogenic differentiation. Thus, NELL-1 effectively enhances in situ osteogenesis in the bone marrow, making it potentially useful in the prevention and treatment of osteoporotic fractures.
Collapse
|
49
|
Shin J, Cho S, Park S, Lee S, Kwak J, Kim S, Morishima K. SU-E-T-234: LET Measurement Using Nuclear Emulsion and Monte Carlo Simulation for Proton Beam. Med Phys 2012; 39:3757. [PMID: 28517348 DOI: 10.1118/1.4735297] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
PURPOSE The significant issue of particle therapy such as proton and carbon ion biological effect on tumors and normal tissue. This effect closely connected with linear-energy-transfer (LET). This work presents a Monte Carlo study using GEANT4 and the verification using Nuclear Emulsion to show LET for proton beam. METHODS National Cancer Center (NCC) has IBA Beam Nozzle and cyclotron for proton therapy. We use proton beam bragg peak range 14cm. Also, we already developed the simulation using GEANT4 and finished validation for scattering proton beam. In our simulation, we make same condition with experimental setup.Nuclear emulsion films interleaved with tissue equivalent absorbers can be fruitfully used to reconstruct proton tracks with very high precision. This Nuclear emulsion film has been supported from Nagoya University, analyzed in Pusan University, was irradiated with a therapeutic proton beam at NCC. The Emulsion packs was located at entrance and bragg peak region of proton. This position means low and high LET region. The scanning of the emulsions has been performed at Nagoya University, where a fully automated microscopic scanning technology has been developed for the OPERA experiment on neutrino oscillations. RESULTS We could see the reconstructed track of proton scanning emulsion. From film scanning, we got the LET distribution at low and high LET region for several proton tracks. Simulation results was similar distribution within standard deviation in acceptance level. Also we got the RBE distribution using LET measurement for proton beam. CONCLUSIONS We measured LET at entrance and bragg peak region using Monte Carlo study and Nuclear Emulsion film, for NCC proton beam. This results means the good observation of LET using the nuclear emulsion. And this method can be used successfully in medical field.
Collapse
|
50
|
Min B, Kwak J, Lee J, Cho S, Park S, Yoo S, Chung K, Cho S, Lim Y, Shin D, Lee S, Kim J. SU-E-J-63: Feasibility Study of Proton Digital Tomosynthesis in Proton Beam Therapy. Med Phys 2012; 39:3666-3667. [DOI: 10.1118/1.4734898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|