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45 results on '"Tsui, Alex"'

9. Extremes of baseline cognitive function determine the severity of delirium: a population study

Author

Tsui, Alex, primary, Yeo, Natalie, additional, Searle, Samuel D, additional, Bowden, Helen, additional, Hoffmann, Katrin, additional, Hornby, Joanne, additional, Goslett, Arley, additional, Weston-Clarke, Maryse, additional, Lanham, David, additional, Hogan, Patrick, additional, Seeley, Anna, additional, Rawle, Mark, additional, Chaturvedi, Nish, additional, Sampson, Elizabeth L, additional, Rockwood, Kenneth, additional, Cunningham, Colm, additional, Ely, E Wesley, additional, Richardson, Sarah J, additional, Brayne, Carol, additional, Terrera, Graciela Muniz, additional, Tieges, Zoë, additional, MacLullich, Alasdair M J, additional, and Davis, Daniel, additional

Published
2023
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10. Additional file 1 of Predicting mortality in acutely hospitalised older patients: the impact of model dimensionality

Author

Tsui, Alex, Tudosiu, Petru-Daniel, Brudfors, Mikael, Jha, Ashwani, Cardoso, Jorge, Ourselin, Sebastien, Ashburner, John, Rees, Geraint, Davis, Daniel, and Nachev, Parashkev

Abstract

Additional file 1: Fig. S1. Intention to investigate effects in blood tests. Fig. S2. The effect of feature number and modality on predictive performance. Fig. S3. Decision threshold diagnostics for the best multimodal model. Fig. S4. Subpopulation performance. Table S1. Blood test missingness, ordered by magnitude. Table S2. Hyperparameter cross-validation grid search range and XGboost final hyperparameters.

Published
2023
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11. Globally Optimal Cortical Surface Matching with Exact Landmark Correspondence

Author

Tsui, Alex, Fenton, Devin, Vuong, Phong, Hass, Joel, Koehl, Patrice, Amenta, Nina, Coeurjolly, David, DeCarli, Charles, Carmichael, Owen, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Gee, James C., editor, Joshi, Sarang, editor, Pohl, Kilian M., editor, Wells, William M., editor, and Zöllei, Lilla, editor

Published
2013
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13. The effect of baseline cognition and delirium on long-term cognitive impairment and mortality: a prospective population-based study

Author

Tsui, Alex, primary, Searle, Samuel D, additional, Bowden, Helen, additional, Hoffmann, Katrin, additional, Hornby, Joanne, additional, Goslett, Arley, additional, Weston-Clarke, Maryse, additional, Hamill Howes, Lee, additional, Street, Rebecca, additional, Perera, Rachel, additional, Taee, Kayvon, additional, Kustermann, Christoph, additional, Chitalu, Petronella, additional, Razavi, Benjamin, additional, Magni, Francesco, additional, Das, Devajit, additional, Kim, Sung, additional, Chaturvedi, Nish, additional, Sampson, Elizabeth L, additional, Rockwood, Kenneth, additional, Cunningham, Colm, additional, Ely, E Wesley, additional, Richardson, Sarah J, additional, Brayne, Carol, additional, Muniz Terrera, Graciela, additional, Tieges, Zoë, additional, MacLullich, Alasdair, additional, and Davis, Daniel, additional

Published
2022
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27. Juxtacrine signalling via Notch and ErbB receptors in the switch to fate commitment of bone marrow‐derived Schwann cells

Author

Shea, Graham Ka‐Hon, primary, Tai, Evelyn Wing‐Yin, additional, Leung, Katherine Ho‐Yan, additional, Mung, Alan Kwan‐Long, additional, Li, Maximilian Tak‐Sui, additional, Tsui, Alex Yat‐Ping, additional, Tam, Anthony Kin‐Wai, additional, Shum, Daisy Kwok‐Yan, additional, and Chan, Ying‐Shing, additional

Published
2020
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29. Supplementary_material_1 – Supplemental material for Feasibility of predictive model by clinical and laboratory parameters for risk stratification of geriatric abdominal pain

Author

Lui, Chun Tat, Ching, Wei Ming, Kwok Leung Tsui, Chu, Ho Cheung, Tsui, Alex To Shing, Au, Tak Shun, Wong, Tai Wai, Fan, Kit Ling, and Leung, Ling Pong

Subjects
FOS: Clinical medicine, 110305 Emergency Medicine
Abstract

Supplemental material, Supplementary_material_1 for Feasibility of predictive model by clinical and laboratory parameters for risk stratification of geriatric abdominal pain by Chun Tat Lui, Wei Ming Ching, Kwok Leung Tsui, Ho Cheung Chu, Alex To Shing Tsui, Tak Shun Au, Tai Wai Wong, Kit Ling Fan and Ling Pong Leung in Hong Kong Journal of Emergency Medicine

Published
2018
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30. Derivation of oligodendrocyte precursor cells from human bone marrow stromal cells and use for re-myelination in the congenitally dysmyelinated brain

Author

Lam, Guy, primary, Shea, Graham Ka-Hon, additional, Wu, Lap Kei, additional, Sui, Maximillian Li Tak, additional, Hei, Kwok Chun, additional, Kuen, Zora Chan Chui, additional, Cheuk Yin, Yvonne Wong, additional, Tsui, Alex Yat Ping, additional, Shum, Daisy Kwok Yan, additional, and Chan, Ying Shing, additional

Published
2019
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38. Scottish Intercollegiate Guidelines Network: risk reduction and management of delirium.

Author

Davis, Daniel, Searle, Samuel D, and Tsui, Alex

Subjects
DIAGNOSIS of delirium, DELIRIUM, RISK of delirium, COGNITION disorders, DEMENTIA, HEALTH education, MEDICAL care, HEALTH policy, MEDICAL protocols, MEDICAL practice, RISK management in business, PSYCHOLOGICAL stress, PATIENT-centered care, THERAPEUTICS
Abstract

The article discusses the Scottish Intercollegiate Guidelines Network (SIGN) for risk reduction and management of delirium. Other topics include the importance of the 4 'A's Test (4AT) in delirium diagnosis, the effectiveness of non-pharmacological management of cognitive disorder spectrums in hospitals, as well as the advances in delirium research, practice, education and policy in Great Britain.

Published
2019
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43. Design and development of computer aided data acquisition environments for anemometers

Author

Tsui, Alex.

Subjects
Engineering, General
Abstract

Dept. of Mechanical, Automotive, and Materials Engineering. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis1989 .T785. Source: Masters Abstracts International, Volume: 40-07, page: . Thesis (M.Sc.)--University of Windsor (Canada), 1989.

Published
1989

44. Improving recognition and management of acute kidney injury.

Author

Tsui A, Rajani C, Doshi R, De Wolff J, Tennant R, Duncan N, and Penn H

Subjects
Humans, Prognosis, Prospective Studies, Acute Kidney Injury therapy, Disease Management
Abstract

Acute kidney injury (AKI) is currently suboptimally recognised and managed in the UK, despite its association with significant patient morbidity, mortality and consequent implications for healthcare economics. Our prospective study, performed in a large urban London hospital, demonstrated that the introduction of a specially designed care bundle can significantly improve documentation of baseline creatinine, assessment and optimisation of fluid status, performance of urine dip, withholding of nephrotoxic drugs, appropriate monitoring of urine output, prescription of renal drug doses, and appropriate consideration of a renal ultrasound and urinary protein-creatinine ratio. Improved compliance of appropriate investigations and initial treatments translated to decreased requirement for intensive care admission and a trend towards shorter length of stays.

Published
2014

45. Impact of Markov Random Field optimizer on MRI-based tissue segmentation in the aging brain.

Author

Schwarz CG, Tsui A, Fletcher E, Singh B, DeCarli C, and Carmichael O

Subjects
Aged, Computer Simulation, Humans, Software, Aging pathology, Algorithms, Brain pathology, Image Processing, Computer-Assisted methods, Magnetic Resonance Imaging methods, Markov Chains
Abstract

Automatically segmenting brain magnetic resonance images into grey matter, white matter, and cerebrospinal fluid compartments is a fundamentally important neuroimaging problem whose difficulty is heightened in the presence of aging and neurodegenerative disease. Current methods overlap greatly in terms of identifiable algorithmic components, and the impact of specific components on performance is generally unclear in important real-world scenarios involving serial scanning, multiple scanners, and neurodegenerative disease. Therefore we evaluated the impact that one such component, the Markov Random Field (MRF) optimizer that encourages spatially-smooth tissue labelings, has on brain tissue segmentation performance. Two challenging elderly data sets were used to test segmentation consistency across scanners and biological plausibility of tissue change estimates; and a simulated young brain data set was used to test accuracy against ground truth. Belief propagation (BP) and graph cuts (GC), used as the MRF optimizer component of a standardized segmentation system, provide high segmentation performance on aggregate that is competitive with end-to-end systems provided by SPM and FSL (FAST) as well as the more traditional MRF optimizer iterated conditional modes (ICM). However, the relative performance of each method varied strongly by performance criterion and differed between young and old brains. The findings emphasize the unique difficulties involved in segmenting the aging brain, and suggest that optimal algorithm components may depend in part on performance criteria.

Published
2011
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