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Kirkpatrick J, Yoo S, Light K, Antoine P, Walker R, Clough R, Robbins M, Cozart H, Tabor J, Willett C. Implementing a Clinically Driven Electronic Medical Record for Radiation Oncology in a Major Medical Center. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1154] [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]
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102
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Yoo S, Wu Q, O'Daniel J, Horton J, Yin F. Breast Cancer Radiation Treatment Planning: A Comparison of Anisotropic Analytical Algorithm (AAA) and Pencil Beam Convolution (PBC) Algorithm. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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103
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Adamson J, Yoo S, Wu Q, Yin F. Variation of Clinically Relevant Dose Indices for 3DCRT of Lung with Respect to Dose Calculation Algorithm. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1652] [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]
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104
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Ryu JJ, Yoo S, Kim KY, Park JS, Bang S, Lee SH, Yang TJ, Cho H, Hwang SW. Laser modulation of heat and capsaicin receptor TRPV1 leads to thermal antinociception. J Dent Res 2010; 89:1455-60. [PMID: 20935279 DOI: 10.1177/0022034510381394] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Er,Cr:YSGG lasers are used clinically in dentistry. The advantages of laser therapy include minimal thermal damage and the alleviation of pain. This study examined whether the Er,Cr:YSGG laser has in vivo and in vitro antinociceptive effects in itself. In capsaicin-evoked acute licking/shaking tests and Hargreaves tests, laser irradiation with an aerated water spray suppressed nociceptive behavior in mice. Laser irradiation attenuated TRPV1 activation by capsaicin in Ca(2+) imaging experiments with TRPV1-overexpressing cells and cultured trigeminal neurons. Therefore, the laser-induced behavioral changes are probably due to the loss of TRPV1 activity. TRPV4 activity was also attenuated, but limited mechanical antinociception by the laser was observed. The laser failed to alter the other receptor functions, which indicates that the antinociceptive effect of the laser is dependent on TRPV1. These results suggest that the Er,Cr:YSGG laser has analgesic effects via TRPV1 inhibition. Such mechanistic approaches may help define the laser-sensitive pain modality and increase its beneficial uses.
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105
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Paul MC, Harun SW, Huri NAD, Hamzah A, Das S, Pal M, Bhadra SK, Ahmad H, Yoo S, Kalita MP, Boyland AJ, Sahu JK. Performance comparison of Zr-based and Bi-based erbium-doped fiber amplifiers. OPTICS LETTERS 2010; 35:2882-2884. [PMID: 20808356 DOI: 10.1364/ol.35.002882] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
In this Letter, we present a comprehensive comparison of the performance of a zirconia-based erbium-doped fiber amplifier (Zr-EDFA) and a bismuth-based erbium-doped fiber amplifier (Bi-EDFA). The experimental results reveal that a Zr-EDFA can achieve comparable performance to the conventional Bi-EDFA for C-band and L-band operations. With a combination of both Zr and Al, we could achieve a high erbium-doping concentration of about 2800 ppm (parts per million) in the glass host without any phase separations of rare earths. The Zr-based erbium-doped fiber (Zr-EDF) was fabricated using in a ternary glass host, zirconia-yttria-aluminum codoped silica fiber through a solution-doping technique along with modified chemical vapor deposition. At a high input signal of 0 dBm, a flat gain at average value of 13 dB is obtained with a gain variation of less than 2 dB within the wavelength region of 1530-1575 nm and using 2 m of Zr-EDF and 120 mW pump power. The noise figures are less than 9.2 at this wavelength region. It was found that a Zr-EDFA can achieve even better flat-gain value and bandwidth as well as lower noise figure than the conventional Bi-EDFA.
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106
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Yoo S, Pouliot J, Letourneau D, Xing L. TH-B-BRA-01: Treatment Planning Based on CBCT Images Acquired for On-Line Position Verification. Med Phys 2010. [DOI: 10.1118/1.3469469] [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
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107
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Yoo S, O'Daniel J, Horton J, Wu Q, Yin F. SU-GG-T-583: Dosimetric Comparison of Anisotropic Analytical and Pencil Beam Convolution Algorithms in Breast Cancer Radiation Treatment Planning. Med Phys 2010. [DOI: 10.1118/1.3468984] [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
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108
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Kim S, Yoo S, Yin F, Samei E, Yoshizumi T. SU-GG-I-57: Dose and Image Quality Evaluation for Partial and Full-Angle Kilovoltage Cone-Beam CT Protocols. Med Phys 2010. [DOI: 10.1118/1.3468090] [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
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109
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Yoo S, Das S, Wu Q, Brizel D, Yin F. SU-GG-T-136: Treatment Plans Comparison with Static-Gantry IMRT and RapidArcTM for Head-And-Neck Cancers Involving Cervical Lymph Nodes. Med Phys 2010. [DOI: 10.1118/1.3468526] [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
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110
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O'Daniel J, Kishore M, Das S, Wu QJ, Yoo S, Yin F. SU-GG-T-225: Gantry-Angle Dependence of a 2D Ion Chamber Array for IMAT QA. Med Phys 2010. [DOI: 10.1118/1.3468616] [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
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111
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Lee G, Choi S, Chae S, Park J, Chon J, Yoo S, Park H. T-4 Changes in Structure and Adhesion Force of Collagen Fibril in Rat Achilles Tendinitis Utilizing AFM. J Biomech 2010. [DOI: 10.1016/s0021-9290(10)70134-2] [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]
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112
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Pepek J, Willett C, Clough R, Wu Q, Yoo S, Czito B. Intensity Modulated Radiation Therapy (IMRT) for Anal Cancer: The Duke University Experience. Int J Radiat Oncol Biol Phys 2009. [DOI: 10.1016/j.ijrobp.2009.07.614] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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113
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Leeper S, Yin F, Yoo S. Evaluation of In-Room Cone-Beam CT Imaging Techniques Compared to CT for Dose Calculation. Int J Radiat Oncol Biol Phys 2009. [DOI: 10.1016/j.ijrobp.2009.07.1531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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114
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Yoo S, Kim HB, Lee SY, Kim BS, Kim JH, Yu J, Kim BJ, Lee DH, Seong MW, Hong SJ. Effect of active smoking on asthma symptoms, pulmonary function, and BHR in adolescents. Pediatr Pulmonol 2009; 44:954-61. [PMID: 19728392 DOI: 10.1002/ppul.21066] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND Active smoking is known to increase asthma symptoms and bronchial hyper-responsiveness (BHR) while decreasing pulmonary function in adults, but few studies have addressed these issues in adolescents. METHODS We conducted a cross-sectional survey involving questionnaires and assessment of urinary cotinine levels among 1,492 adolescents from three urban areas of South Korea. Current smoking was defined as having smoked more than 1 day in the prior 30 days or having urine cotinine levels >or=100 ng/ml. Spirometry, skin tests, and methacholine challenge tests were performed on adolescents in Seoul (n = 724). RESULTS The prevalence of current smoking was 8.2% in boys and 2.4% in girls. Reports of wheeze and exercise-induced wheeze in the previous 12 months were more frequent in smokers than nonsmokers (15.2% vs. 8.5%, P = 0.024, and 20.4% vs. 10.7%, P = 0.004, respectively). In multiple logistic regression analysis, current smoking was found to be a significant risk factor for having wheezed in previous 12 months (OR = 4.5, 95% CI 1.5-13.2) and having exercise-induced wheezing in previous 12 months (OR = 8.7, 95% CI, 3.7-20.9). The subgroup analysis revealed that the FEV(1)/FVC was lower in smokers than nonsmokers (mean +/- SD, 105.1 +/- 8.6% vs. 107.8 +/- 7.8%, P = 0.019). In contrast, there was no significant difference in BHR. The effect of smoking on asthma symptoms were more pronounced in non-atopic compared with atopic adolescents. CONCLUSION Current smoking was significantly associated with symptoms of asthma, such as having recent wheezing and recent exercise-induced wheezing, especially for non-atopics, in Korean adolescent population. Current smoking was further associated with lower pulmonary function, but not BHR.
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Lee C, Suh Y, Lee I, Yoo S, Cha J, Yoon H, Keum K, Seong J, Suh C, Kim G. 6554 High-dose versus standard-dose radiation therapy in combined modality therapy for esophageal cancer. EJC Suppl 2009. [DOI: 10.1016/s1359-6349(09)71276-5] [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] Open
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116
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Cattamanchi A, Davis JL, Worodria W, den Boon S, Yoo S, Matovu J, Kiidha J, Nankya F, Kyeyune R, Byanyima P, Andama A, Joloba M, Osmond DH, Hopewell PC, Huang L. Sensitivity and specificity of fluorescence microscopy for diagnosing pulmonary tuberculosis in a high HIV prevalence setting. Int J Tuberc Lung Dis 2009; 13:1130-1136. [PMID: 19723403 PMCID: PMC2754584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023] Open
Abstract
SETTING Mulago Hospital, Kampala, Uganda. OBJECTIVE To evaluate the diagnostic performance of fluorescence microscopy (FM) for diagnosing pulmonary tuberculosis (TB) in a high human immunodeficiency virus (HIV) prevalence setting. DESIGN Consecutive in-patients with cough for >2 weeks submitted two sputum specimens for smear microscopy. Smears were examined by conventional light microscopy (CM) and FM. The performance of the two methods was compared using mycobacterial culture as a reference standard. RESULTS A total of 426 patients (82% HIV-infected) were evaluated. FM identified 11% more smear-positive patients than CM (49% vs. 38%, P < 0.001). However, positive FM results were less likely than positive CM results to be confirmed by culture when smears were read as either 'scanty' (54% vs. 90%, P < 0.001) or 1+ (82% vs. 91%, P = 0.02). Compared to CM, the sensitivity of FM was higher (72% vs. 64%, P = 0.005), and the specificity lower (81% vs. 96%, P < 0.001). In receiver operating characteristic analysis, maximum area under the curve for FM was obtained at a threshold of >4 acid-fast bacilli/100 fields (sensitivity 68%, specificity 90%). CONCLUSION Although FM increases the sensitivity of sputum smear microscopy, additional data on FM specificity and on the clinical consequences associated with false-positive FM results are needed to guide implementation of this technology in high HIV prevalence settings.
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Zhu X, Bourland JD, Yuan Y, Zhuang T, O'Daniel J, Thongphiew D, Wu QJ, Das SK, Yoo S, Yin FF. Tradeoffs of integrating real-time tracking into IGRT for prostate cancer treatment. Phys Med Biol 2009; 54:N393-401. [PMID: 19661570 DOI: 10.1088/0031-9155/54/17/n03] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
This study investigated the integration of the Calypso real-time tracking system, based on implanted ferromagnetic transponders and a detector array, into the current process for image-guided radiation treatment (IGRT) of prostate cancer at our institution. The current IGRT process includes magnetic resonance imaging (MRI) for prostate delineation, CT simulation for treatment planning, daily on-board kV and CBCT imaging for target alignment, and MRI/MRS for post-treatment assessment. This study assesses (1) magnetic-field-induced displacement and radio-frequency (RF)-induced heating of transponders during MRI at 1.5 T and 3 T, and (2) image artifacts caused by transponders and the detector array in phantom and patient cases with the different imaging systems. A tissue-equivalent phantom mimicking prostate tissue stiffness was constructed and implanted with three operational transponders prior to phantom solidification. The measurements show that the Calypso system is safe with all the imaging systems. Transponder position displacements due to the MR field are minimal (<1.0 mm) for both 1.5 T and 3 T MRI scanners, and the temperature variation due to MRI RF heating is <0.2 degrees C. The visibility of transponders and bony anatomy was not affected on the OBI kV and CT images. Image quality degradation caused by the detector antenna array is observed in the CBCT image. Image artifacts are most significant with the gradient echo sequence in the MR images, producing null signals surrounding the transponders with radii approximately 1.5 cm and length approximately 4 cm. Thus, Calypso transponders can preclude the use of MRI/MRS in post-treatment assessment. Modifications of the clinical flow are required to accommodate and minimize the substantial MRI artifacts induced by the Calypso transponders.
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Chang Z, Wang Z, Wu Q, Bowsher J, Yoo S, Yin F. SU-FF-T-309: Quality Assurance for Imaging Guided Stereotactic RadioSurgery with Novalis Tx™ System. Med Phys 2009. [DOI: 10.1118/1.3181789] [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
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119
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Yoo S, Wu Q, Lee W, Yin F. SU-FF-T-574: Radiotherapy Treatment Plans with RapidArc for Prostate Cancer Involving Seminal Vesicles. Med Phys 2009. [DOI: 10.1118/1.3182072] [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
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120
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Wu QJ, McMahon R, Chang Z, Zhuang T, O'Daniel J, Yoo S, Zhu X, Yin F. SU-FF-T-301: Clinical Implementation and Commission of Volumetric Modulated Arc Therapy. Med Phys 2009. [DOI: 10.1118/1.3181779] [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
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121
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Yin F, Wu Q, Godfrey D, Ren L, Yoo S, Maurer J, Yan H. TH-A-211A-01: Digital Tomosynthesis for Target Localization. Med Phys 2009. [DOI: 10.1118/1.3182588] [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
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122
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Zhu X, Bourland J, Yuan Y, Zhuang T, O'Daniel J, Thongphiew D, Wu Q, Das S, Yoo S, Yin F. SU-FF-J-56: Integrating Real-Time Tracking Into Image Guided Radiation Therapy for Prostate Cancer Treatment. Med Phys 2009. [DOI: 10.1118/1.3181348] [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
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123
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Leeper S, Yoo S, Yin FF. SU-FF-J-12: HU and Dosimetric Comparison of Six Cone-Beam CT Acquisition Techniques for Radiation Therapy Planning. Med Phys 2009. [DOI: 10.1118/1.3181304] [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
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124
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Wu Q, Yoo S, Kirkpatrick J, McMahon R, Thongphiew D, Yin F. SU-FF-T-567: Volumetric Modulated Arc Therapy for Spine Body Radiotherapy: Comparison with Static Intensity Modulated Treatment. Med Phys 2009. [DOI: 10.1118/1.3182065] [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
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125
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Yoo S, Das S, Wu Q, Brizel D, Yoo D, Yin F. SU-FF-T-130: Radiotherapy Treatment Plans with RapidArc for Head-And-Neck Cancer. Med Phys 2009. [DOI: 10.1118/1.3181604] [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
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