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392 results on '"Shueng,Pei-Wei"'

9. Ultrasound examination supporting CT or MRI in the evaluation of cervical lymphadenopathy in patients with irradiation-treated head and neck cancer

Author

Cheng Ping-Chia, Chang Chih-Ming, Liao Li-Jen, Hsieh Chen-Hsi, Shueng Pei-Wei, Cheng Po-Wen, and Lo Wu-Chia

Subjects
lymphadenopathy, ultrasound, fine‐needle aspiration cytology, computed tomography, magnetic resonance imaging, Medicine
Abstract

In this study, we determined the diagnostic performance of adding ultrasound (US) with/without fine‐needle aspiration cytology (FNAC) to computed tomography (CT)/magnetic resonance imaging (MRI) in evaluating neck lymphadenopathy (LAP) in patients with head and neck cancer treated with irradiation. We included 269 patients who had neck LAP after radiotherapy (RT) or concurrent chemoradiotherapy (CCRT) resulting from cancers of the head and neck region between October 2008 and September 2018. The diagnostic methods consisted of the following: 1) CT/MRI alone, 2) CT/MRI combined with a post-RT US predictive model, and 3) CT/MRI combined with US + FNAC. We compared their diagnostic performance using receiver operating characteristic (ROC) curves. In total, 141 (52%) malignant and 128 (48%) benign LAPs were observed. Regarding the diagnostic accuracy, the area under the ROC curves was highest for the combined CT/MRI and US + FNAC (0.965), followed by the combined CT/MRI and post-RT US predictive model (0.906) and CT/MRI alone (0.836). Our data suggest that the addition of a US examination to CT/MRI resulted in higher diagnostic performance than CT/MRI alone in terms of diagnosing recurrent or persistent nodal disease during the evaluation of LAP in patients with irradiation-treated head and neck cancer.

Published
2023
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15. Evaluation of cutout factors with small and narrow fields using various dosimetry detectors in electron beam keloid radiotherapy.

Author

Lin, Yu-Fang, Hsieh, Chen-Hsi, Tien, Hui-Ju, Lee, Yi-Huan, Chen, Yi-Chun, Lai, Lu-Han, Hsu, Shih-Ming, and Shueng, Pei-Wei

Subjects
IONIZATION chambers, MEDICAL dosimetry, ELECTRON beams, DETECTORS, ELECTRONS, DOSIMETERS
Abstract

BACKGROUND: The inherent problems in the existence of electron equilibrium and steep dose fall-off pose difficulties for small- and narrow-field dosimetry. OBJECTIVE: To investigate the cutout factors for keloid electron radiotherapy using various dosimetry detectors for small and narrow fields. METHOD: The measurements were performed in a solid water phantom with nine different cutout shapes. Five dosimetry detectors were used in the study: pinpoint 3D ionization chamber, Farmer chamber, semiflex chamber, Classic Markus parallel plate chamber, and EBT3 film. RESULTS: The results demonstrated good agreement between the semiflex and pinpoint chambers. Furthermore, there was no difference between the Farmer and pinpoint chambers for large cutouts. For the EBT3 film, half of the cases had differences greater than 1%, and the maximum discrepancy compared with the reference chamber was greater than 2% for the narrow field. CONCLUSION: The parallel plate, semiflex chamber and EBT3 film are suitable dosimeters that are comparable with pinpoint 3D chambers in small and narrow electron fields. Notably, a semiflex chamber could be an alternative option to a pinpoint 3D chamber for cutout widths≥3 cm. It is very important to perform patient-specific cutout factor calibration with an appropriate dosimeter for keloid radiotherapy. [ABSTRACT FROM AUTHOR]

Published
2024
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24. Integrating subvolume dose and myocardial perfusion imaging parameters to assess the impact of radiation therapy on heart function in breast cancer patients: A comparative analysis between left‐ and right‐sided breast cancer

Author

Wang, Shan‐Ying, primary, Tsai, Wei‐Ta, additional, Lin, Kuan‐Heng, additional, Yu, Chih‐Wei, additional, Yang, Shu‐Ya, additional, Shueng, Pei‐Wei, additional, Wu, Yen‐Wen, additional, Hsu, Chen‐Xiong, additional, and Wu, Tung‐Hsin, additional

Published
2023
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35. Modulated Electro-Hyperthermia Enhances Tumor Cell Sus-ceptibility to Gamma Delta T Cell-Mediated Cytotoxicity and Tumor Infiltration

Author

Chen, Yi-Ching, primary, Chang, Yu-Kang, additional, Tung, Min-Che, additional, Lan, Keng-Li, additional, Tsang, Yuk-Wah, additional, Chang, Heng-Jui, additional, Hu, Gin-Hao, additional, Lu, Long-Sheng, additional, Leung, Stephen W, additional, Shueng, Pei-Wei, additional, Hung, Shih-Kai, additional, Chao, Yee, additional, Wang, Yu-Shan, additional, and Chiu, Yu-Chi, additional

Published
2022
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41. Integrating18 F‐FDG PET/ CT with lung dose‐volume for assessing lung inflammatory changes after arc‐based radiotherapy for esophageal cancer: A pilot study

Author

Hsu, Chen‐Xiong, primary, Lin, Kuan‐Heng, additional, Shueng, Pei‐Wei, additional, Wu, Yen‐Wen, additional, Tsai, Wei‐Ta, additional, Chang, Chiu‐Han, additional, Tien, Hui‐Ju, additional, Wang, Shan‐Ying, additional, Wu, Tung‐Hsin, additional, and Mok, Greta S. P., additional

Published
2022
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50. Cardiac Function after Modern Radiation Therapy with Volumetric Modulated Arc Therapy or Helical Tomotherapy for Advanced Left-Breast Cancer Receiving Regional Nodal Irradiation

Author

Hou, Pei-Yu, primary, Hsieh, Chen-Hsi, additional, Wu, Le-Jung, additional, Hsu, Chen-Xiong, additional, Kuo, Deng-Yu, additional, Lu, Yueh-Feng, additional, Wu, Yen-Wen, additional, Tien, Hui-Ju, additional, Hsu, Shih-Ming, additional, and Shueng, Pei-Wei, additional

Published
2022
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