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Galceran J, Parada D, Eden M, Tumino R, Warren AY, Martos C, Neamtiu L, Visser O, Daubisse-Marliac L. The 2022 ENCR Recommendations on recording and reporting of urothelial tumours of the urinary tract. Front Oncol 2022; 12:1046239. [PMID: 36505871 PMCID: PMC9727225 DOI: 10.3389/fonc.2022.1046239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 10/28/2022] [Indexed: 11/24/2022] Open
Abstract
An updated European Network of Cancer registries (ENCR) Recommendations on Recording and Reporting of Urothelial Tumours of the Urinary Tract had been published in 2022. After the publication by the ENCR of the "Recommendations for coding bladder cancers" in 1995, knowledge about the biology and pathology of urinary tract tumors and their classification has varied and increased substantially. On the other hand, several studies have shown that cancer registries use different definitions, criteria for inclusion and coding of urothelial tumors. This great variability among registries affects not only the criteria for recording (registration, coding and classification) but also the criteria of reporting (counting in the statistics of incidence and survival) urinary tract tumors. This causes difficulties in the data comparability from different registries. Recording and reporting of urothelial tumors requires the application of standard criteria that must take into account the combination of the multiple aspects as the primary topography, the histological type, the grade, the extent of invasion, the multi-centricity, the progressions and the time interval between tumors. This led to the creation of a Working Group of the ENCR that developed these recommendations on the recording and reporting of urothelial tumors of the urinary tract. This article reports these recommendations and the rationale for each.
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Affiliation(s)
- Jaume Galceran
- Cancer Epidemiology and Prevention Service, Hospital Universitari Sant Joan de Reus, Reus, Spain,Institut d’Investigacions Sanitàries Pere Virgili (IISPV), Reus, Spain,Faculty of Medicine and Health Sciences, Universitat Rovira i Virgili, Reus-Tarragona, Spain,*Correspondence: Jaume Galceran, ; Carmen Martos,
| | - David Parada
- Institut d’Investigacions Sanitàries Pere Virgili (IISPV), Reus, Spain,Faculty of Medicine and Health Sciences, Universitat Rovira i Virgili, Reus-Tarragona, Spain,Pathology Service, Hospital Universitari Sant Joan de Reus, Reus, Spain
| | | | - Rosario Tumino
- Cancer Registry and Histopathology Department, Provincial Health Authority (ASP), Ragusa, Italy
| | - Anne Yvonne Warren
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, United Kingdom
| | - Carmen Martos
- European Commission, Joint Research Centre (JRC), Ispra, Italy,*Correspondence: Jaume Galceran, ; Carmen Martos,
| | - Luciana Neamtiu
- European Commission, Joint Research Centre (JRC), Ispra, Italy
| | - Otto Visser
- Netherlands Comprehensive Cancer Organization (IKNL), Utrecht, Netherlands
| | - Laetitia Daubisse-Marliac
- Claudius Regaud Institute, IUCT-O, Tarn Cancer Registry, Toulouse, France,CERPOP, Toulouse University, Inserm UMR 1295, UPS, Toulouse, France,FRANCIM, Network of French Cancer Registries, Toulouse, France,University Hospital Center, IUCT-O, Cancer Coordination Center, Toulouse, France
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Moody S, Senkin S, Islam SMA, Wang J, Nasrollahzadeh D, Cortez Cardoso Penha R, Fitzgerald S, Bergstrom EN, Atkins J, He Y, Khandekar A, Smith-Byrne K, Carreira C, Gaborieau V, Latimer C, Thomas E, Abnizova I, Bucciarelli PE, Jones D, Teague JW, Abedi-Ardekani B, Serra S, Scoazec JY, Saffar H, Azmoudeh-Ardalan F, Sotoudeh M, Nikmanesh A, Poustchi H, Niavarani A, Gharavi S, Eden M, Richman P, Campos LS, Fitzgerald RC, Ribeiro LF, Soares-Lima SC, Dzamalala C, Mmbaga BT, Shibata T, Menya D, Goldstein AM, Hu N, Malekzadeh R, Fazel A, McCormack V, McKay J, Perdomo S, Scelo G, Chanudet E, Humphreys L, Alexandrov LB, Brennan P, Stratton MR. Mutational signatures in esophageal squamous cell carcinoma from eight countries with varying incidence. Nat Genet 2021; 53:1553-1563. [PMID: 34663923 DOI: 10.1038/s41588-021-00928-6] [Citation(s) in RCA: 60] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 07/28/2021] [Indexed: 12/28/2022]
Abstract
Esophageal squamous cell carcinoma (ESCC) shows remarkable variation in incidence that is not fully explained by known lifestyle and environmental risk factors. It has been speculated that an unknown exogenous exposure(s) could be responsible. Here we combine the fields of mutational signature analysis with cancer epidemiology to study 552 ESCC genomes from eight countries with varying incidence rates. Mutational profiles were similar across all countries studied. Associations between specific mutational signatures and ESCC risk factors were identified for tobacco, alcohol, opium and germline variants, with modest impacts on mutation burden. We find no evidence of a mutational signature indicative of an exogenous exposure capable of explaining differences in ESCC incidence. Apolipoprotein B mRNA-editing enzyme, catalytic polypeptide-like (APOBEC)-associated mutational signatures single-base substitution (SBS)2 and SBS13 were present in 88% and 91% of cases, respectively, and accounted for 25% of the mutation burden on average, indicating that APOBEC activation is a crucial step in ESCC tumor development.
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Affiliation(s)
- Sarah Moody
- Cancer, Ageing and Somatic Mutation, Wellcome Sanger Institute, Wellcome Genome Campus, Cambridge, UK
| | - Sergey Senkin
- Genomic Epidemiology Branch, International Agency for Research on Cancer (IARC/WHO), Lyon, France
| | - S M Ashiqul Islam
- Moores Cancer Centre, UC San Diego Health, La Jolla, CA, USA
- Department of Cellular and Molecular Medicine, University of California, La Jolla, CA, USA
- Department of Bioengineering, University of California, La Jolla, CA, USA
| | - Jingwei Wang
- Cancer, Ageing and Somatic Mutation, Wellcome Sanger Institute, Wellcome Genome Campus, Cambridge, UK
| | - Dariush Nasrollahzadeh
- Genomic Epidemiology Branch, International Agency for Research on Cancer (IARC/WHO), Lyon, France
- Digestive Oncology Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Shariati Hospital, Tehran, Iran
| | | | - Stephen Fitzgerald
- Cancer, Ageing and Somatic Mutation, Wellcome Sanger Institute, Wellcome Genome Campus, Cambridge, UK
| | - Erik N Bergstrom
- Moores Cancer Centre, UC San Diego Health, La Jolla, CA, USA
- Department of Cellular and Molecular Medicine, University of California, La Jolla, CA, USA
- Department of Bioengineering, University of California, La Jolla, CA, USA
| | - Joshua Atkins
- Genomic Epidemiology Branch, International Agency for Research on Cancer (IARC/WHO), Lyon, France
| | - Yudou He
- Moores Cancer Centre, UC San Diego Health, La Jolla, CA, USA
- Department of Cellular and Molecular Medicine, University of California, La Jolla, CA, USA
- Department of Bioengineering, University of California, La Jolla, CA, USA
| | - Azhar Khandekar
- Moores Cancer Centre, UC San Diego Health, La Jolla, CA, USA
- Department of Cellular and Molecular Medicine, University of California, La Jolla, CA, USA
- Department of Bioengineering, University of California, La Jolla, CA, USA
| | - Karl Smith-Byrne
- Genomic Epidemiology Branch, International Agency for Research on Cancer (IARC/WHO), Lyon, France
| | - Christine Carreira
- Evidence Synthesis and Classification Branch, International Agency for Research on Cancer (IARC/WHO), Lyon, France
| | - Valerie Gaborieau
- Genomic Epidemiology Branch, International Agency for Research on Cancer (IARC/WHO), Lyon, France
| | - Calli Latimer
- Cancer, Ageing and Somatic Mutation, Wellcome Sanger Institute, Wellcome Genome Campus, Cambridge, UK
| | - Emily Thomas
- Cancer, Ageing and Somatic Mutation, Wellcome Sanger Institute, Wellcome Genome Campus, Cambridge, UK
| | - Irina Abnizova
- Cancer, Ageing and Somatic Mutation, Wellcome Sanger Institute, Wellcome Genome Campus, Cambridge, UK
| | - Pauline E Bucciarelli
- Cancer, Ageing and Somatic Mutation, Wellcome Sanger Institute, Wellcome Genome Campus, Cambridge, UK
| | - David Jones
- Cancer, Ageing and Somatic Mutation, Wellcome Sanger Institute, Wellcome Genome Campus, Cambridge, UK
| | - Jon W Teague
- Cancer, Ageing and Somatic Mutation, Wellcome Sanger Institute, Wellcome Genome Campus, Cambridge, UK
| | - Behnoush Abedi-Ardekani
- Genomic Epidemiology Branch, International Agency for Research on Cancer (IARC/WHO), Lyon, France
| | | | - Jean-Yves Scoazec
- Department Laboratory Medicine and Pathology, Gustave Roussy, Paris, France
| | - Hiva Saffar
- Department of Pathology, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Farid Azmoudeh-Ardalan
- Liver Transplantation Research Center, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran
| | - Masoud Sotoudeh
- Digestive Oncology Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Shariati Hospital, Tehran, Iran
| | - Arash Nikmanesh
- Digestive Oncology Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Shariati Hospital, Tehran, Iran
| | - Hossein Poustchi
- Digestive Oncology Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Shariati Hospital, Tehran, Iran
| | - Ahmadreza Niavarani
- Digestive Oncology Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Shariati Hospital, Tehran, Iran
| | - Samad Gharavi
- Digestive Oncology Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Shariati Hospital, Tehran, Iran
| | - Michael Eden
- Cambridge University Hospitals NHS Foundation Trust, Cambridge Biomedical Campus, Cambridge, UK
| | - Paul Richman
- Histopathology Department, Hemel Hempstead General Hospital, Hemel Hempstead, UK
| | - Lia S Campos
- West Suffolk NHS Foundation Trust, Bury St Edmunds, UK
| | | | | | | | | | - Blandina Theophil Mmbaga
- Kilimanjaro Clinical Research Institute, Kilimanjaro Christian Medical Centre & Kilimanjaro Christian Medical University College, Moshi, Tanzania
| | - Tatsuhiro Shibata
- Division of Cancer Genomics, National Cancer Centre Research Institute, Tokyo, Japan
| | | | - Alisa M Goldstein
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, Rockville, MD, USA
| | - Nan Hu
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, Rockville, MD, USA
| | - Reza Malekzadeh
- Digestive Oncology Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Shariati Hospital, Tehran, Iran
| | - Abdolreza Fazel
- Golestan Research Center of Gastroenterology and Hepatology, Golestan University of Medical Sciences, Gorgan, Iran
| | - Valerie McCormack
- Environment and Lifestyle Epidemiology Branch, International Agency for Research on Cancer (IARC/WHO), Lyon, France
| | - James McKay
- Genomic Epidemiology Branch, International Agency for Research on Cancer (IARC/WHO), Lyon, France
| | - Sandra Perdomo
- Genomic Epidemiology Branch, International Agency for Research on Cancer (IARC/WHO), Lyon, France
| | - Ghislaine Scelo
- Genomic Epidemiology Branch, International Agency for Research on Cancer (IARC/WHO), Lyon, France
- Cancer Epidemiology Unit, Department of Medical Sciences, University of Turin, Turin, Italy
| | - Estelle Chanudet
- Genomic Epidemiology Branch, International Agency for Research on Cancer (IARC/WHO), Lyon, France
| | - Laura Humphreys
- Cancer, Ageing and Somatic Mutation, Wellcome Sanger Institute, Wellcome Genome Campus, Cambridge, UK
| | - Ludmil B Alexandrov
- Moores Cancer Centre, UC San Diego Health, La Jolla, CA, USA
- Department of Cellular and Molecular Medicine, University of California, La Jolla, CA, USA
- Department of Bioengineering, University of California, La Jolla, CA, USA
| | - Paul Brennan
- Genomic Epidemiology Branch, International Agency for Research on Cancer (IARC/WHO), Lyon, France
| | - Michael R Stratton
- Cancer, Ageing and Somatic Mutation, Wellcome Sanger Institute, Wellcome Genome Campus, Cambridge, UK.
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Girdauskas E, Kempfert J, Kuntze T, Holubec T, Krane M, Borger M, Eden M, Bramlage P, Pausch J, Gross TMS, Müller L, Reichenspurner H. Standardized Subannular Repair for Treatment of Secondary Mitral Regurgitation: Initial Results from the Reform-MR Registry. Thorac Cardiovasc Surg 2021. [DOI: 10.1055/s-0041-1725719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Araghi M, Arnold M, Rutherford MJ, Guren MG, Cabasag CJ, Bardot A, Ferlay J, Tervonen H, Shack L, Woods RR, Saint-Jacques N, De P, McClure C, Engholm G, Gavin AT, Morgan E, Walsh PM, Jackson C, Porter G, Møller B, Bucher O, Eden M, O'Connell DL, Bray F, Soerjomataram I. Colon and rectal cancer survival in seven high-income countries 2010-2014: variation by age and stage at diagnosis (the ICBP SURVMARK-2 project). Gut 2021; 70:114-126. [PMID: 32482683 DOI: 10.1136/gutjnl-2020-320625] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 04/01/2020] [Accepted: 04/23/2020] [Indexed: 12/22/2022]
Abstract
OBJECTIVES As part of the International Cancer Benchmarking Partnership (ICBP) SURVMARK-2 project, we provide the most recent estimates of colon and rectal cancer survival in seven high-income countries by age and stage at diagnosis. METHODS Data from 386 870 patients diagnosed during 2010-2014 from 19 cancer registries in seven countries (Australia, Canada, Denmark, Ireland, New Zealand, Norway and the UK) were analysed. 1-year and 5-year net survival from colon and rectal cancer were estimated by stage at diagnosis, age and country, RESULTS: (One1-year) and 5-year net survival varied between (77.1% and 87.5%) 59.1% and 70.9% and (84.8% and 90.0%) 61.6% and 70.9% for colon and rectal cancer, respectively. Survival was consistently higher in Australia, Canada and Norway, with smaller proportions of patients with metastatic disease in Canada and Australia. International differences in (1-year) and 5-year survival were most pronounced for regional and distant colon cancer ranging between (86.0% and 94.1%) 62.5% and 77.5% and (40.7% and 56.4%) 8.0% and 17.3%, respectively. Similar patterns were observed for rectal cancer. Stage distribution of colon and rectal cancers by age varied across countries with marked survival differences for patients with metastatic disease and diagnosed at older ages (irrespective of stage). CONCLUSIONS Survival disparities for colon and rectal cancer across high-income countries are likely explained by earlier diagnosis in some countries and differences in treatment for regional and distant disease, as well as older age at diagnosis. Differences in cancer registration practice and different staging systems across countries may have impacted the comparisons.
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Affiliation(s)
- Marzieh Araghi
- Section of Cancer Surveillance, International Agency for Research on Cancer, Lyon, France
| | - Melina Arnold
- Section of Cancer Surveillance, International Agency for Research on Cancer, Lyon, France
| | - Mark J Rutherford
- Section of Cancer Surveillance, International Agency for Research on Cancer, Lyon, France
- Biostatistics Research Group, Department of Health Sciences, University of Leicester, Leicester, UK
| | - Marianne Grønlie Guren
- Department of Oncology and K.G. Jebsen Colorectal Cancer Research Centre, Oslo University Hospital, Oslo, Norway
| | - Citadel J Cabasag
- Section of Cancer Surveillance, International Agency for Research on Cancer, Lyon, France
| | - Aude Bardot
- Section of Cancer Surveillance, International Agency for Research on Cancer, Lyon, France
| | - Jacques Ferlay
- Section of Cancer Surveillance, International Agency for Research on Cancer, Lyon, France
| | - Hanna Tervonen
- Cancer Institute NSW, Alexandria, New South Wales, Australia
| | - Lorraine Shack
- Cancer Control Alberta, Alberta Health Services, Calgary, Alberta, Canada
| | - Ryan R Woods
- BC Cancer Agency, Vancouver, British Columbia, Canada
| | - Nathalie Saint-Jacques
- Registry & Analytics, Nova Scotia Health Authority Cancer Care Program, Halifax, Nova Scotia, Canada
| | - Prithwish De
- Surveillance and Cancer Registry, Cancer Care Ontario, Toronto, Ontario, Canada
| | - Carol McClure
- PEI Cancer Registry, Charlottetown, Prince Edward Island, Canada
| | - Gerda Engholm
- Cancer Prevention & Documentation, Danish Cancer Society, Copenhagen, Denmark
| | - Anna T Gavin
- Northern Ireland Cancer Registry, Queen's University Belfast, Belfast, UK
| | - Eileen Morgan
- Section of Cancer Surveillance, International Agency for Research on Cancer, Lyon, France
- Northern Ireland Cancer Registry, Queen's University Belfast, Belfast, UK
| | | | | | - Geoff Porter
- Canadian Partnership Against Cancer, Toronto, Ontario, Canada
| | - Bjorn Møller
- Institute of Population-Based Cancer Research, Cancer Registry of Norway, Oslo, Norway
| | - Oliver Bucher
- Population Oncology, CancerCare Manitoba, Winnipeg, Manitoba, Canada
| | - Michael Eden
- National Cancer Registry and Analysis Service, London, UK
| | - Dianne L O'Connell
- Cancer Research Division, Cancer Council NSW, Sydney, New South Wales, Australia
| | - Freddie Bray
- Section of Cancer Surveillance, International Agency for Research on Cancer, Lyon, France
| | - Isabelle Soerjomataram
- Section of Cancer Surveillance, International Agency for Research on Cancer, Lyon, France
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Cabasag CJ, Butler J, Arnold M, Rutherford M, Bardot A, Ferlay J, Morgan E, Møller B, Gavin A, Norell CH, Harrison S, Saint-Jacques N, Eden M, Rous B, Nordin A, Hanna L, Kwon J, Cohen PA, Altman AD, Shack L, Kozie S, Engholm G, De P, Sykes P, Porter G, Ferguson S, Walsh P, Trevithick R, Tervonen H, O'Connell D, Bray F, Soerjomataram I. Exploring variations in ovarian cancer survival by age and stage (ICBP SurvMark-2): A population-based study. Gynecol Oncol 2020; 157:234-244. [PMID: 32005583 DOI: 10.1016/j.ygyno.2019.12.047] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 12/24/2019] [Accepted: 12/30/2019] [Indexed: 10/25/2022]
Abstract
OBJECTIVE The study aims to evaluate the differences in ovarian cancer survival by age and stage at diagnosis within and across seven high-income countries. METHODS We analyzed data from 58,161 women diagnosed with ovarian cancer during 2010-2014, followed until 31 December 2015, from 21 population-based cancer registries in Australia, Canada, Denmark, Ireland, New Zealand, Norway, and United Kingdom. Comparisons of 1-year and 3-year age- and stage-specific net survival (NS) between countries were performed using the period analysis approach. RESULTS Minor variation in the stage distribution was observed between countries, with most women being diagnosed with 'distant' stage (ranging between 64% in Canada and 71% in Norway). The 3-year all-ages NS ranged from 45 to 57% with Australia (56%) and Norway (57%) demonstrating the highest survival. The proportion of women with 'distant' stage was highest for those aged 65-74 and 75-99 years and varied markedly between countries (range:72-80% and 77-87%, respectively). The oldest age group had the lowest 3-year age-specific survival (20-34%), and women aged 65-74 exhibited the widest variation across countries (3-year NS range: 40-60%). Differences in survival between countries were particularly stark for the oldest age group with 'distant' stage (3-year NS range: 12% in Ireland to 24% in Norway). CONCLUSIONS International variations in ovarian cancer survival by stage exist with the largest differences observed in the oldest age group with advanced disease. This finding endorses further research investigating international differences in access to and quality of treatment, and prevalence of comorbid conditions particularly in older women with advanced disease.
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Affiliation(s)
- Citadel J Cabasag
- Section of Cancer Surveillance, International Agency for Research on Cancer (IARC/WHO), 150 Cours Albert Thomas, Lyon 69372 CEDEX 08, France.
| | - John Butler
- Royal Marsden Hospital, Fulham Road, London SW3 6JJ, England, UK
| | - Melina Arnold
- Section of Cancer Surveillance, International Agency for Research on Cancer (IARC/WHO), 150 Cours Albert Thomas, Lyon 69372 CEDEX 08, France
| | - Mark Rutherford
- Section of Cancer Surveillance, International Agency for Research on Cancer (IARC/WHO), 150 Cours Albert Thomas, Lyon 69372 CEDEX 08, France; Biostatistics Research Group, Department of Health Sciences, University of Leicester, University Road, Leicester LE1 7RH, UK
| | - Aude Bardot
- Section of Cancer Surveillance, International Agency for Research on Cancer (IARC/WHO), 150 Cours Albert Thomas, Lyon 69372 CEDEX 08, France
| | - Jacques Ferlay
- Section of Cancer Surveillance, International Agency for Research on Cancer (IARC/WHO), 150 Cours Albert Thomas, Lyon 69372 CEDEX 08, France
| | - Eileen Morgan
- Section of Cancer Surveillance, International Agency for Research on Cancer (IARC/WHO), 150 Cours Albert Thomas, Lyon 69372 CEDEX 08, France; Northern Ireland Cancer Registry, Centre for Public Health, Queen's University Belfast, Belfast, Northern Ireland, UK
| | - Bjørn Møller
- Cancer Registry of Norway, Institute of Population-based Cancer Research, P.O. Box 5313, Majorstuen, 0304 Oslo, Norway
| | - Anna Gavin
- Northern Ireland Cancer Registry, Centre for Public Health, Queen's University Belfast, Belfast, Northern Ireland, UK
| | - Charles H Norell
- Policy & Information Directorate, Cancer Research UK, London, England, UK
| | - Samantha Harrison
- Policy & Information Directorate, Cancer Research UK, London, England, UK
| | - Nathalie Saint-Jacques
- Nova Scotia Health Authority Cancer Care Program, Registry & Analytics, 1276 South Street, Halifax B3H 2Y9, NS, Canada
| | - Michael Eden
- National Cancer Registrations and Analysis Service, Public Health England, Wellington House, London, UK
| | - Brian Rous
- National Cancer Registrations and Analysis Service, Public Health England, Wellington House, London, UK
| | - Andy Nordin
- East Kent Hospitals University National Health Service Foundation Trust, Kent, England, UK
| | - Louise Hanna
- Velindre University National Health Service Trust, Cardiff, Wales, UK
| | - Janice Kwon
- Department of Obstetrics and Gynecology, Division of Gynecologic Oncology, University of British Columbia, Vancouver, British Columbia, Canada; BC Cancer, Department of Surgical Oncology, Vancouver, British Columbia, Canada
| | - Paul A Cohen
- University of Western Australia, Division of Obstetrics and Gynaecology, Crawley, Western Australia, Australia; St John of God Subiaco Hospital, Subiaco, Western Australia, Australia
| | - Alon D Altman
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of Manitoba, Winnipeg, MB R3A 1R9, Canada
| | - Lorraine Shack
- Cancer Control Alberta, Alberta Health Services, 2210 2nd Street, SW, Calgary, AB T2S 3C3, Canada
| | - Serena Kozie
- Registry Department, Saskatchewan Cancer Agency, Regina, SK S4W 0G3, Canada
| | - Gerda Engholm
- Danish Cancer Society, Strandboulevarden 49, 2100 Copenhagen, Denmark
| | - Prithwish De
- Surveillance & Cancer Registry, Cancer Care Ontario, 620 University Ave., Toronto, ON M5G 2L7, Canada
| | - Peter Sykes
- University of Otago, Christchurch, New Zealand
| | - Geoff Porter
- Canadian Partnership Against Cancer, 145 King Street West, Suite 900, Toronto, Ontario M5H 1J8, Canada
| | - Sarah Ferguson
- Gynecologic Oncology, Princess Margaret Hospital Cancer Centre, Toronto, Ontario, Canada
| | - Paul Walsh
- National Cancer Registry Ireland, Cork Airport Business Park, Kinsale Road, Cork T12 CDF7, Ireland
| | - Richard Trevithick
- Western Australia Cancer and Palliative Care Network Policy Unit, Health Networks Branch, Department of Health, Perth, Western Australia, Australia
| | - Hanna Tervonen
- Cancer Institute NSW, PO Box 41, Alexandria NSW 1435, Australia
| | - Dianne O'Connell
- Cancer Research Division, Cancer Council NSW, Sydney, New South Wales, Australia
| | - Freddie Bray
- Section of Cancer Surveillance, International Agency for Research on Cancer (IARC/WHO), 150 Cours Albert Thomas, Lyon 69372 CEDEX 08, France
| | - Isabelle Soerjomataram
- Section of Cancer Surveillance, International Agency for Research on Cancer (IARC/WHO), 150 Cours Albert Thomas, Lyon 69372 CEDEX 08, France
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Eden M, Harrison S, Griffin M, Lambe M, Pettersson D, Gavin A, Brewster DH, Lin Y, Johannesen TB, Milne RL, Farrugia H, Nishri D, King MJ, Huws DW, Warlow J, Turner D, Earle CC, Peake M, Rashbass J. Impact of variation in cancer registration practice on observed international cancer survival differences between International Cancer Benchmarking Partnership (ICBP) jurisdictions. Cancer Epidemiol 2019; 58:184-192. [PMID: 30639877 DOI: 10.1016/j.canep.2018.10.019] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 10/08/2018] [Accepted: 10/10/2018] [Indexed: 10/27/2022]
Abstract
BACKGROUND International cancer survival comparisons use cancer registration data to report cancer survival, which informs the development of cancer policy and practice. Studies like the International Cancer Benchmarking Partnership (ICBP) have a duty to understand how registration differences impact on survival prior to drawing conclusions. METHODS Key informants reported differences in registration practice for capturing incidence date, death certificate case handling and registration of multiple primary tumours. Sensitivity analyses estimated their impact on one-year survival using baseline and supplementary cancer registration data from England and Sweden. RESULTS Variations in registration practice accounted for up to a 7.3 percentage point difference between unadjusted (estimates from previous ICBP survival data) and adjusted (estimates recalculated accounting for registration differences) one-year survival, depending on tumour site and jurisdiction. One-year survival estimates for four jurisdictions were affected by adjustment: New South Wales, Norway, Ontario, Sweden. Sweden and Ontario's survival reduced after adjustment, yet they remained the jurisdictions with the highest survival for breast and ovarian cancer respectively. Sweden had the highest unadjusted lung cancer survival of 43.6% which was adjusted to 39.0% leaving Victoria and Manitoba with the highest estimate at 42.7%. For colorectal cancer, Victoria's highest survival of 85.1% remained unchanged after adjustment. CONCLUSION Population-based cancer survival comparisons can be subject to registration biases that may impact the reported 'survival gap' between populations. Efforts should be made to apply consistent registration practices internationally. In the meantime, survival comparison studies should provide acknowledgement of or adjustment for the registration biases that may affect their conclusions.
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Affiliation(s)
- Michael Eden
- National Cancer Registry and Analysis Service (NCRAS), England, UK.
| | | | - Michelle Griffin
- National Disease Registration, Public Health England, England, UK.
| | - Mats Lambe
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Sweden.
| | | | - Anna Gavin
- N. Ireland Cancer Registry, Queen's University Belfast, Northern Ireland, UK.
| | - David H Brewster
- Scottish Cancer Registry, NHS National Services Scotland, Scotland, UK.
| | - Yulan Lin
- European Palliative Care Research Centre (PRC), Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology (NTNU), Norway.
| | | | - Roger L Milne
- Cancer Epidemiology and Intelligence Division, Cancer Council Victoria, Melbourne, Australia.
| | - Helen Farrugia
- Victorian Cancer Registry, Cancer Council Victoria, Melbourne, Australia.
| | - Diane Nishri
- Prevention and Cancer Control, Cancer Care Ontario, Ontario, Canada.
| | - Mary-Jane King
- Ontario Cancer Registry, Cancer Care Ontario, Ontario, Canada.
| | - Dyfed W Huws
- Welsh Cancer Intelligence and Surveillance Unit, Public Health Wales, Wales, UK.
| | - Janet Warlow
- Welsh Cancer Intelligence and Surveillance Unit, Public Health Wales, Wales, UK.
| | - Donna Turner
- Epidemiology and Cancer Registry, CancerCare Manitoba, Manitoba, Canada.
| | - Craig C Earle
- Institute for Clinical Evaluative Sciences, Ontario Institute for Cancer Research, Ontario, Canada.
| | - Michael Peake
- Respiratory Medicine, University of Leicester and National Cancer Registration and Analysis Service (NCRAS), England, UK.
| | - Jem Rashbass
- National Disease Registration, Public Health England, England, UK.
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Amen F, Eden M, Marker A, Barrett B, Wilson P, Sandison A, DiParma S, Petkar M, Harrington KJ, Nutting C, Kerawala C, Clarke P, Mirghani H, Shamil E, Thway K, Naresh K, Stamp GW, Rhys-Evans P. Molecular prediction of lymph node metastases using immunohistochemical analysis of primary oral tongue squamous cell carcinomas. J Clin Oncol 2018. [DOI: 10.1200/jco.2018.36.15_suppl.6054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Furrat Amen
- Addenbrooke's Hospital, Cambridge, United Kingdom
| | - Michael Eden
- Addenbrooke's Hospital, Cambridge, United Kingdom
| | | | - Bill Barrett
- Queen Victoria Hospital, East Grinstead, United Kingdom
| | | | | | | | | | - Kevin J. Harrington
- The Institute of Cancer Research and the Royal Marsden NHS Foundation Trust, Surrey, United Kingdom
| | | | | | | | | | - Eamon Shamil
- University Hospital Lewisham, London, United Kingdom
| | - Khin Thway
- The Royal Marsden NHS Foundation Trust, London, United Kingdom
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Aatish P, Eden M, Kenyatta W, Nawodi A, Yi L, Chris B. Impact of carbon monoxide releasing molecule loading and electrospun scaffold composition on engineered vascular constructs. Front Bioeng Biotechnol 2016. [DOI: 10.3389/conf.fbioe.2016.01.03019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Eden M, Tompkins J, Verheijde J. Reliability and validity of functional performance assessments in patients with head and neck cancer. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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10
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Langer C, Both M, Harders H, Lutz M, Eden M, Kühl C, Sattler B, Jansen O, Schaefer P, Frey N. Late enhanced computed tomography in Hypertrophic Cardiomyopathy enables accurate left-ventricular volumetry. Eur Radiol 2014; 25:575-84. [PMID: 25316053 DOI: 10.1007/s00330-014-3434-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Revised: 08/22/2014] [Accepted: 09/04/2014] [Indexed: 01/19/2023]
Abstract
OBJECTIVES Late enhancement (LE) multi-slice computed tomography (leMDCT) was introduced for the visualization of (intra-) myocardial fibrosis in Hypertrophic Cardiomyopathy (HCM). LE is associated with adverse cardiac events. This analysis focuses on leMDCT derived LV muscle mass (LV-MM) which may be related to LE resulting in LE proportion for potential risk stratification in HCM. METHODS N=26 HCM-patients underwent leMDCT (64-slice-CT) and cardiovascular magnetic resonance (CMR). In leMDCT iodine contrast (Iopromid, 350 mg/mL; 150mL) was injected 7 minutes before imaging. Reconstructed short cardiac axis views served for planimetry. The study group was divided into three groups of varying LV-contrast. LeMDCT was correlated with CMR. RESULTS The mean age was 64.2 ± 14 years. The groups of varying contrast differed in weight and body mass index (p < 0.05). In the group with good LV-contrast assessment of LV-MM resulted in 147.4 ± 64.8 g in leMDCT vs. 147.1 ± 65.9 in CMR (p > 0.05). In the group with sufficient contrast LV-MM appeared with 172 ± 30.8 g in leMDCT vs. 165.9 ± 37.8 in CMR (p > 0.05). Overall intra-/inter-observer variability of semiautomatic assessment of LV-MM showed an accuracy of 0.9 ± 8.6 g and 0.8 ± 9.2 g in leMDCT. All leMDCT-measures correlated well with CMR (r > 0.9). CONCLUSIONS LeMDCT primarily performed for LE-visualization in HCM allows for accurate LV-volumetry including LV-MM in > 90% of the cases. KEY POINTS • LeMDCT of relatively low contrast allows for LV planimetry in HCM. • The correlation of leMDCT-based LV volumetry with gold-standard CMR was excellent (r > 0.9). • LeMDCT requires approximately 2.0mL/kgBW of dye to achieve acceptable contrast.
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Affiliation(s)
- Christoph Langer
- Department of Cardiology, Angiology and Critical Care Medicine, University Medical Center Schleswig-Holstein, Campus Kiel, Christian-Albrechts-Universität Kiel, Schittenhelmstr. 12, 24105, Kiel, Germany,
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Affiliation(s)
- Michael Eden
- National Cancer Registration Service , Cambridge , UK
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Langer C, Hohnhorst M, Schaefer P, Lutz M, Luedde M, Eden M, Kuehl C, Prinz C, Faber L, Frey N. Cardiac CT in hypertrophic cardiomyopathy: volumetric assessment of intramyocardial fibrosis. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht310.p4709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Eden M, Köhl-Hackert N, Krautter M, Jünger J, Nikendei C. An innovative model for the structured on-ward supervision of final year students. Med Teach 2010; 32:181. [PMID: 20163239 DOI: 10.3109/01421591003656867] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
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Abstract
The standard interpolation approach to image resizing is to fit the original picture with a continuous model and resample the function at the desired rate. However, one can obtain more accurate results if one applies a filter prior to sampling, a fact well known from sampling theory. The optimal solution corresponds to an orthogonal projection onto the underlying continuous signal space. Unfortunately, the optimal projection prefilter is difficult to implement when sine or high order spline functions are used. We propose to resize the image using an oblique rather than an orthogonal projection operator in order to make use of faster, simpler, and more general algorithms. We show that we can achieve almost the same result as with the orthogonal projection provided that we use the same approximation space. The main advantage is that it becomes perfectly feasible to use higher order models (e.g. splines of degree n=or>3). We develop the theoretical background and present a simple and practical implementation procedure using B-splines. Our experiments show that the proposed algorithm consistently outperforms the standard interpolation methods and that it provides essentially the same performance as the optimal procedure (least squares solution) with considerably fewer computations. The method works for arbitrary scaling factors and is applicable to both image enlargement and reduction.
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Affiliation(s)
- C Lee
- Department of Electronic Engineering, Yonsei University, Seoul, Korea.
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Unser M, Aldroubi A, Eden M. Enlargement or reduction of digital images with minimum loss of information. IEEE Trans Image Process 1995; 4:247-258. [PMID: 18289976 DOI: 10.1109/83.366474] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The purpose of this paper is to derive optimal spline algorithms for the enlargement or reduction of digital images by arbitrary (noninteger) scaling factors. In our formulation, the original and rescaled signals are each represented by an interpolating polynomial spline of degree n with step size one and Delta, respectively. The change of scale is achieved by determining the spline with step size Delta that provides the closest approximation of the original signal in the L(2)-norm. We show that this approximation can be computed in three steps: (i) a digital prefilter that provides the B-spline coefficients of the input signal, (ii) a resampling using an expansion formula with a modified sampling kernel that depends explicitly on Delta, and (iii) a digital postfilter that maps the result back into the signal domain. We provide explicit formulas for n=0, 1, and 3 and propose solutions for the efficient implementation of these algorithms. We consider image processing examples and show that the present method compares favorably with standard interpolation techniques. Finally, we discuss some properties of this approach and its connection with the classical technique of bandlimiting a signal, which provides the asymptotic limit of our algorithm as the order of the spline tends to infinity.
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Affiliation(s)
- M Unser
- Nat. Center for Res. Resources, Nat. Inst. of Health, Bethesda, MD
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Unser M, Eden M. Nonlinear operators for improving texture segmentation based on features extracted by spatial filtering. ACTA ACUST UNITED AC 1990. [DOI: 10.1109/21.105080] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Unser M, Pelle G, Brun P, Eden M. Automated extraction of serial myocardial borders from M-mode echocardiograms. IEEE Trans Med Imaging 1989; 8:96-103. [PMID: 18230505 DOI: 10.1109/42.20367] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
A method is presented for the automated extraction of myocardial borders in M-mode echocardiograms. The successive steps of processing are: preprocessing for noise reduction, enhancement of border characteristics using a set of suitably chosen matched filters, and final extraction of border points by searching for optimal paths along the time axis. During the last step of processing, the contribution of each elementary border element is characterised by a normalized correlation coefficient. The optimal path, defined as the one that maximizes the sum of all elementary contributions, is determined efficiently using dynamic programming. An alternative approach uses a maximum tracking procedure whose performances are improved by utilizing a local model to predict the position of the next border point. Experimental examples are presented and the performance of both border extraction algorithms are compared.
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Affiliation(s)
- M Unser
- Nat. Inst. of Health, Bethesda, MD
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20
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Eden M. Anatomy, physiology, chemistry, and image processing. Boll Soc Ital Biol Sper 1988; 64:5-26. [PMID: 3077916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Unser M, Ellis JR, Pun T, Eden M. Optimal background estimation in EELS. J Microsc 1987; 145:245-56. [PMID: 3585991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
In quantitative electron energy loss spectrometry, it is desirable to estimate the background law below core edge energy in a way that provides the maximum signal-to-noise ratio. Assuming an inverse power background model and independently Poisson distributed measurements, it is shown how to achieve this goal by using a maximum likelihood (ML) estimation technique which provides unbiased and minimum mean square error estimates of all parameters of interest. An efficient and computationally stable implementation of this procedure is proposed. Standard logarithmic least squares estimations are then compared with the ML approach and the gain in performance due to optimal processing is quantified.
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Eden M. Smart instruments, microprocessors, and personal computers. Int J Technol Assess Health Care 1986; 3:319-25. [PMID: 10284929 DOI: 10.1017/s0266462300000611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
This discussion of Emerging Technology focuses on technological currents in electronic technology rather than in medical technology per se. The influence of the former on the latter is not merely that medical devices have electronic parts, but that the development of new circuit technology can change radically the design, utility, and even the function of the medical devices.
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Schuette WH, Carducci E, Marti GE, Shackney SE, Eden M. The relationship between mean channel selection and the calculated coefficient of variation. Cytometry 1985; 6:487-91. [PMID: 4042790 DOI: 10.1002/cyto.990060515] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Calculated coefficients of variation (CV) taken from the quotient of the standard deviation (S.D.) and the mean value of measured distributions are often used as an indicator of system performance in linear flow cytometry (FCM). The ability of the calculated CV to estimate the true CV of the underlying experiment before grouping (channelization) is dependent on the relationship between the width of the data channels and the magnitude of the S.D. of the measured distribution. When the channel width is equal to the S.D. of a distribution, the calculated CV is approximately 20% larger than the true CV of an experiment. By the time the S.D. is only one-half of a channel width, the calculated CV is unreliable. When the distribution S.D. is narrower than a channel's width, small changes in the distribution mean value will cause large variations in the calculated CV. As the true CV decreases, the calculation must be made with higher mean channel values. This dependence of calculated CV accuracy upon the relationship between S.D. and channel width places limitations upon mean channel selection that must be considered when using CV calculations for evaluating system performance, especially when looking for small improvements during optical alignment procedures. When an instrument is assumed to have a constant CV and the data are collected linearly, it is possible to improve the CV estimation accuracy by placing distributions in higher-numbered channels.(ABSTRACT TRUNCATED AT 250 WORDS)
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Abstract
In quantitative Electron Energy Loss Spectrometry, a weighted least squares estimation should theoretically be used to estimate the background law below core edge energy, since the variances of the data vary. However, it is found that proper weighting makes the above edge signal-to-noise ratio decrease rather than increase. This result is discussed, and the influence of the bias introduced by the logarithmic transformation of the data is quantified.
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Abstract
Optimizing the acquisition parameters for EELS recording has to be accomplished simultaneously from the physical and the statistical points of view; the statistical aspect of the question is covered here. Approximate probability density functions of the variables of interest are derived, which provide a global measure of signal-to-noise ratio taking into account every step of the EELS edge area estimation process. Qualitative and quantitative advice is given regarding the critical choice of the estimation and integration energy regions. The notion of visual contrast is presented; it permits the introduction of the concept of statistical detection limit. It is found that for typical experimental conditions, when other factors are equal, the required analysis time for the sample varies approximately as the inverse square of the concentration.
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Abstract
The proper analysis of positron emission tomographic scan data requires a careful knowledge of the limitations of the tomographic system used so that scan data can be collected and sampled in a manner consistent with those limitations. The present investigation was undertaken to clarify some of the limitations imposed by resolution. The usual imaging situation, e.g., 218FDG , C15O2, or 15O2 , involves imaging structures of limited size in all three dimensions which may appear either warm or cool in relation to some background level of activity. In emission tomography the importance of adequate data sampling within a given plane has been frequently emphasized. Little attention, however, has been given to proper z axis sampling for clinical scanning. The actual selection of regions of interest from scans can have a significant impact on the subsequent statistical analysis. Previous work on this subject has experimentally examined the relationship of object size to quantitative estimation in the hot spot-cold background situation for the one- and two-dimensional cases. Approximate three-dimensional recovery coefficients for the hot spot-cold background situation have been calculated. An examination of the factors discussed above, three-dimensional objects with varying contrast, z axis sampling, and selection of regions of interest, has not yet been addressed in the literature. The purpose of the present investigation is to examine these factors.
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Bell E, Marek LF, Merrill C, Levinstone DS, Young T, Eden M, Sher S. Loss of Division Potential in Culture: Aging or Differentiation? Science 1980; 208:1483. [PMID: 17796697 DOI: 10.1126/science.208.4451.1483] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Bell E, Levinstone D, Sher S, Marek L, Merrill C, Young I, Eden M. An interactive computer system for the analysis of cell lineages. J Histochem Cytochem 1979; 27:458-62. [PMID: 374610 DOI: 10.1177/27.1.374610] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
We have developed an interactive computer system for analysing cell lineage data. It can be utilized in studies of cell motility, cell division, cell differentiation, and cell aging. It has enabled us to document the heterogeneity of human foreskin fibroblasts in culture and to propose that loss of proliferative potential may mean that cells enter a state of differentiation which makes them unable to respond to mitotic stimulation. Our method, which enables us to apply immunological and cytochemical probes after recording the history of a cell lineage, should allow us to define precisely features which uniquely distinguish cycling from noncycling cells on an individual cell basis.
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Abstract
We have examined the hypothesis that diploid cells grown in vitro age, and propose that only proliferative potential and not life-span is telescoped. We suggest that explanted or transplanted diploid cells are driven to divide by the process of subculturing in vitro or in vivo and, in response to this pressure, also complete their differentiation and become refractory to further mitotic stimulation. We conclude that differentiation rather than "mortality" distinguishes diploid from transformed cells and that the former may not age in vitro, but are lost because culture methods are selective for cycling cells.
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Abstract
A new approach to a system for chromosome karyotyping is presented. The system assembles the information about chromosomes from several cells at a time, thereby filtering out noise due to variations in the slide preparations. The system makes i possible to use metaphase spreads which are incomplete due to missing chromosomes, touching and overlapping chromosomes and stain particles. The system gives a precise description of the chromosome complement in terms of distribution function parameters, with the uncertainty of the parameters specificed. The system is adaptive with respect to the initial reference parameter set so that both recognition of normal chromosomes, in spite of the variation displayed among individuals, and identification of aberrant chromosomes are possible. The precise chromosome descriptors can be used to detect differences between the tested individual and various references, in order to find chromosomal abnormalities.
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Blesser B, Shillman R, Kuklinski T, Cox C, Eden M, Ventura J. A theoretical approach for character recognition based on phenomenological attributes. ACTA ACUST UNITED AC 1974. [DOI: 10.1016/s0020-7373(74)80033-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Eden M, Green JE, Sun A. Feasibility of computer screening of blood films for the detection of malaria parasites. Bull World Health Organ 1973; 48:211-8. [PMID: 4578363 PMCID: PMC2481007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
This paper considers the feasibility of automatic screening procedures for detecting malaria parasites in blood smears prepared in the field. A simple programme for pattern recognition by computer has been developed for thin blood films that identifies parasites as densely stained particles within an erythrocyte. The parasites are detected correctly, but platelets falling accidentally within the outline of an erythrocyte and perhaps reticulocytes may be wrongly classified as parasites. The results indicate that automated detection of parasites is technically feasible but that the technique needs to be refined to reduce the incidence of false positives. A substantial increase in processing speed is required if the automatic procedure is to be economically feasible in screening programmes. The complexity of the equipment and the need for well prepared blood smears point to a possible use of the technique in laboratory checks but not under usual field conditions.
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Eden M. Image processing techniques in relation to studies of red cell shape. Nouv Rev Fr Hematol 1972; 12:861-9. [PMID: 4268795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Eden M, Bates R. Resolution of the dissociation constants of d,l-malic acid from 0-degrees-c to 50-degrees-c. J Res Natl Bur Stand (1977) 1959. [DOI: 10.6028/jres.062.028] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Bates R, Diamond P, Eden M, Acree S. Salt effects of potassium nitrate, sodium sulfate, and trisodium citrate on the activity coefficients of p-phenolsulfonate buffers. J Res Natl Bur Stand (1977) 1946. [DOI: 10.6028/jres.037.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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