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Muenzel D, Bani A, De Brauwer M, Stewart E, Djakiman C, Halwi, Purnama R, Yusuf S, Santoso P, Hukom FD, Struebig M, Jompa J, Limmon G, Dumbrell A, Beger M. Combining environmental DNA and visual surveys can inform conservation planning for coral reefs. Proc Natl Acad Sci U S A 2024; 121:e2307214121. [PMID: 38621123 PMCID: PMC11047114 DOI: 10.1073/pnas.2307214121] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 11/14/2023] [Indexed: 04/17/2024] Open
Abstract
Environmental DNA (eDNA) metabarcoding has the potential to revolutionize conservation planning by providing spatially and taxonomically comprehensive data on biodiversity and ecosystem conditions, but its utility to inform the design of protected areas remains untested. Here, we quantify whether and how identifying conservation priority areas within coral reef ecosystems differs when biodiversity information is collected via eDNA analyses or traditional visual census records. We focus on 147 coral reefs in Indonesia's hyper-diverse Wallacea region and show large discrepancies in the allocation and spatial design of conservation priority areas when coral reef species were surveyed with underwater visual techniques (fishes, corals, and algae) or eDNA metabarcoding (eukaryotes and metazoans). Specifically, incidental protection occurred for 55% of eDNA species when targets were set for species detected by visual surveys and 71% vice versa. This finding is supported by generally low overlap in detection between visual census and eDNA methods at species level, with more overlap at higher taxonomic ranks. Incomplete taxonomic reference databases for the highly diverse Wallacea reefs, and the complementary detection of species by the two methods, underscore the current need to combine different biodiversity data sources to maximize species representation in conservation planning.
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Affiliation(s)
- Dominic Muenzel
- School of Biology, Faculty of Biological Sciences, University of Leeds, LeedsLS2 9JT, United Kingdom
- Durrell Institute of Conservation and Ecology, School of Anthropology and Conservation, University of Kent, CanterburyCT2 7NR, United Kingdom
| | - Alessia Bani
- School of Biology, Faculty of Biological Sciences, University of Leeds, LeedsLS2 9JT, United Kingdom
- School of Life Sciences, University of Essex, ColchesterCO4 3SQ, United Kingdom
- College of Science and Engineering, School of Built and Natural Environment,University of Derby, DerbyDE22 1 GB, United Kingdom
| | - Maarten De Brauwer
- School of Biology, Faculty of Biological Sciences, University of Leeds, LeedsLS2 9JT, United Kingdom
- Commonwealth Scientific and Industrial Research Organisation Oceans & Atmosphere, Battery Point, Hobart, TAS7004, Australia
| | - Eleanor Stewart
- Durrell Institute of Conservation and Ecology, School of Anthropology and Conservation, University of Kent, CanterburyCT2 7NR, United Kingdom
| | - Cilun Djakiman
- School of Biology, Faculty of Biological Sciences, University of Leeds, LeedsLS2 9JT, United Kingdom
- Maritime and Marine Science Center of Excellence, Pattimura University, Ambon85XW+H66, Indonesia
| | - Halwi
- Graduate School, Universitas Hasanuddin, Makassar90245, Indonesia
| | - Ray Purnama
- Maritime and Marine Science Center of Excellence, Pattimura University, Ambon85XW+H66, Indonesia
| | - Syafyuddin Yusuf
- Faculty of Marine Science and Fisheries, Universitas Hasanuddin, Makassar90245, Indonesia
| | - Prakas Santoso
- Department of Marine Science and Technology, Institut Pertanian Bogor, Bogor16680, Indonesia
| | - Frensly D. Hukom
- Research Centre for Oceanography, Badan Riset dan Inovasi Nasional, Jakarta14430, Indonesia
- The Center for Collaborative Research on Aquatic Ecosystem in Eastern Indonesia, Pattimura University, Ambon97234, Indonesia
| | - Matthew Struebig
- Durrell Institute of Conservation and Ecology, School of Anthropology and Conservation, University of Kent, CanterburyCT2 7NR, United Kingdom
| | - Jamaluddin Jompa
- Faculty of Marine Science and Fisheries, Universitas Hasanuddin, Makassar90245, Indonesia
| | - Gino Limmon
- Maritime and Marine Science Center of Excellence, Pattimura University, Ambon85XW+H66, Indonesia
- The Center for Collaborative Research on Aquatic Ecosystem in Eastern Indonesia, Pattimura University, Ambon97234, Indonesia
| | - Alex Dumbrell
- School of Life Sciences, University of Essex, ColchesterCO4 3SQ, United Kingdom
| | - Maria Beger
- School of Biology, Faculty of Biological Sciences, University of Leeds, LeedsLS2 9JT, United Kingdom
- Centre for Biodiversity and Conservation Science, School of Biological Sciences, University of Queensland, Brisbane, QLD4072, Australia
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Muenzel D, Critchell K, Cox C, Campbell SJ, Jakub R, Suherfian W, Sara L, Chollett I, Treml EA, Beger M. Integrating larval connectivity into the marine conservation decision-making process across spatial scales. Conserv Biol 2023; 37:e14038. [PMID: 36478610 DOI: 10.1111/cobi.14038] [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] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 09/20/2022] [Accepted: 10/01/2022] [Indexed: 05/30/2023]
Abstract
Larval dispersal connectivity is typically integrated into spatial conservation decisions at regional or national scales, but implementing agencies struggle with translating these methods to local scales. We used larval dispersal connectivity at regional (hundreds of kilometers) and local (tens of kilometers) scales to aid in design of networks of no-take reserves in Southeast Sulawesi, Indonesia. We used Marxan with Connectivity informed by biophysical larval dispersal models and remotely sensed coral reef habitat data to design marine reserve networks for 4 commercially important reef species across the region. We complemented regional spatial prioritization with decision trees that combined network-based connectivity metrics and habitat quality to design reserve boundaries locally. Decision trees were used in consensus-based workshops with stakeholders to qualitatively assess site desirability, and Marxan was used to identify areas for subsequent network expansion. Priority areas for protection and expected benefits differed among species, with little overlap in reserve network solutions. Because reef quality varied considerably across reefs, we suggest reef degradation must inform the interpretation of larval dispersal patterns and the conservation benefits achievable from protecting reefs. Our methods can be readily applied by conservation practitioners, in this region and elsewhere, to integrate connectivity data across multiple spatial scales.
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Affiliation(s)
- Dominic Muenzel
- School of Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Kay Critchell
- School of Life and Environmental Sciences, Centre for Integrative Ecology, Deakin University, Geelong, Victoria, Australia
| | | | | | - Raymond Jakub
- Rare, Arlington, Virginia, USA
- Rare Indonesia, Kota Bogor, Indonesia
| | | | - La Sara
- Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, Haluoleo University, Kendari, Indonesia
| | | | - Eric A Treml
- School of Life and Environmental Sciences, Centre for Integrative Ecology, Deakin University, Geelong, Victoria, Australia
| | - Maria Beger
- School of Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK
- Centre for Biodiversity and Conservation Science, School of Biological Sciences, University of Queensland, Brisbane, Queensland, Australia
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Cannon SE, Donner SD, Liu A, González Espinosa PC, Baird AH, Baum JK, Bauman AG, Beger M, Benkwitt CE, Birt MJ, Chancerelle Y, Cinner JE, Crane NL, Denis V, Depczynski M, Fadli N, Fenner D, Fulton CJ, Golbuu Y, Graham NAJ, Guest J, Harrison HB, Hobbs JPA, Hoey AS, Holmes TH, Houk P, Januchowski-Hartley FA, Jompa J, Kuo CY, Limmon GV, Lin YV, McClanahan TR, Muenzel D, Paddack MJ, Planes S, Pratchett MS, Radford B, Reimer JD, Richards ZT, Ross CL, Rulmal J, Sommer B, Williams GJ, Wilson SK. Macroalgae exhibit diverse responses to human disturbances on coral reefs. Glob Chang Biol 2023; 29:3318-3330. [PMID: 37020174 DOI: 10.1111/gcb.16694] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 03/01/2023] [Accepted: 03/01/2023] [Indexed: 05/16/2023]
Abstract
Scientists and managers rely on indicator taxa such as coral and macroalgal cover to evaluate the effects of human disturbance on coral reefs, often assuming a universally positive relationship between local human disturbance and macroalgae. Despite evidence that macroalgae respond to local stressors in diverse ways, there have been few efforts to evaluate relationships between specific macroalgae taxa and local human-driven disturbance. Using genus-level monitoring data from 1205 sites in the Indian and Pacific Oceans, we assess whether macroalgae percent cover correlates with local human disturbance while accounting for factors that could obscure or confound relationships. Assessing macroalgae at genus level revealed that no genera were positively correlated with all human disturbance metrics. Instead, we found relationships between the division or genera of algae and specific human disturbances that were not detectable when pooling taxa into a single functional category, which is common to many analyses. The convention to use percent cover of macroalgae as an indication of local human disturbance therefore likely obscures signatures of local anthropogenic threats to reefs. Our limited understanding of relationships between human disturbance, macroalgae taxa, and their responses to human disturbances impedes the ability to diagnose and respond appropriately to these threats.
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Affiliation(s)
- Sara E Cannon
- Department of Geography, University of British Columbia, British Columbia, Vancouver, Canada
| | - Simon D Donner
- Department of Geography, University of British Columbia, British Columbia, Vancouver, Canada
| | - Angela Liu
- Department of Geography, University of British Columbia, British Columbia, Vancouver, Canada
- School of Geography and the Environment, University of Oxford, Oxford, UK
| | - Pedro C González Espinosa
- Department of Geography, University of British Columbia, British Columbia, Vancouver, Canada
- Institute for the Oceans and Fisheries, University of British Columbia, British Columbia, Vancouver, Canada
| | - Andrew H Baird
- Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook University, Queensland, Townsville, Australia
| | - Julia K Baum
- Department of Biology, University of Victoria, British Columbia, Victoria, Canada
| | - Andrew G Bauman
- Department of Marine and Environmental Science, Nova Southeastern University, Florida, Dania Beach, USA
| | - Maria Beger
- School of Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK
- Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, Pattimura University, Ambon, Indonesia
- Centre for Biodiversity and Conservation Science, University of Queensland, Queensland, St Lucia, Australia
| | | | - Matthew J Birt
- Australian Institute of Marine Science, Western Australia, Perth, Australia
| | - Yannick Chancerelle
- CRIOBE, UAR 3278 CNRS-EPHE-UPVD, Moorea French Polynesia and the French Center for Excellence for Coral Reefs (LabEx Corail), PSL Research University, Paris, France
| | - Joshua E Cinner
- Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook University, Queensland, Townsville, Australia
| | - Nicole L Crane
- One People One Reef, California, Santa Cruz, USA
- Department of Biology, Cabrillo College, California, Aptos, USA
| | - Vianney Denis
- Institute of Oceanography, National Taiwan University, Taipei, Taiwan
| | - Martial Depczynski
- Australian Institute of Marine Science, Western Australia, Perth, Australia
| | - Nur Fadli
- Faculty of Marine and Fisheries, Universitas Syiah Kuala, Banda Aceh, Indonesia
| | | | | | | | | | - James Guest
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne, UK
| | - Hugo B Harrison
- Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook University, Queensland, Townsville, Australia
- School of Biological Sciences, University of Bristol, Bristol, UK
| | - Jean-Paul A Hobbs
- School of Biological Sciences, The University of Queensland, Queensland, Brisbane, Australia
| | - Andrew S Hoey
- Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook University, Queensland, Townsville, Australia
| | - Thomas H Holmes
- Marine Science Program, Biodiversity and Conservation Science, Department of Biodiversity Conservation and Attractions, Western Australia, Kensington, Australia
| | - Peter Houk
- University of Guam Marine Laboratory, UOG Station, Mangilao, Guam
| | | | - Jamaluddin Jompa
- Department of Marine Science and Fisheries, Hasanuddin University, South Sulawesi, Makassar, Indonesia
| | - Chao-Yang Kuo
- Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook University, Queensland, Townsville, Australia
- Biodiversity Research Center, Academia Sinica, Taipei, Taiwan
| | - Gino Valentino Limmon
- Department of Marine Biology, Pattimura University, Ambon, Indonesia
- Maritime and Marine Science Centre of Excellence, Pattimura University, Ambon, Indonesia
| | - Yuting V Lin
- Institute of Oceanography, National Taiwan University, Taipei, Taiwan
| | | | - Dominic Muenzel
- School of Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Michelle J Paddack
- One People One Reef, California, Santa Cruz, USA
- Santa Barbara City College, California, Santa Barbara, USA
| | - Serge Planes
- CRIOBE, UAR 3278 CNRS-EPHE-UPVD, Moorea French Polynesia and the French Center for Excellence for Coral Reefs (LabEx Corail), PSL Research University, Paris, France
| | - Morgan S Pratchett
- Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook University, Queensland, Townsville, Australia
| | - Ben Radford
- Australian Institute of Marine Science, Western Australia, Perth, Australia
- Oceans Institute, University of Western Australia, Western Australia, Perth, Australia
| | - James Davis Reimer
- Department of Marine Science, Chemistry and Biology, Faculty of Science, University of the Ryukyus, Okinawa, Japan
- Tropical Biosphere Research Center, University of the Ryukyus, Okinawa, Japan
| | - Zoe T Richards
- Coral Conservation and Research Group, School of Molecular and Life Sciences, Curtin University, Western Australia, Bently, Australia
- Collections and Research, Western Australian Museum, Western Australia, Perth, Australia
| | - Claire L Ross
- Marine Science Program, Biodiversity and Conservation Science, Department of Biodiversity Conservation and Attractions, Western Australia, Kensington, Australia
- Oceans Institute, University of Western Australia, Western Australia, Perth, Australia
| | - John Rulmal
- One People One Reef, California, Santa Cruz, USA
- Ulithi Falalop Community Action Program, Yap, Micronesia
| | - Brigitte Sommer
- School of Life and Environmental Sciences, The University of Sydney, New South Wales, Sydney, Australia
- School of Life Sciences, University of Technology Sydney, 2007, New South Wales, Sydney, Australia
| | | | - Shaun K Wilson
- Marine Science Program, Biodiversity and Conservation Science, Department of Biodiversity Conservation and Attractions, Western Australia, Kensington, Australia
- Oceans Institute, University of Western Australia, Western Australia, Perth, Australia
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Muenzel D, Critchell K, Cox C, Campbell SJ, Jakub R, Chollett I, Krueck N, Holstein D, Treml EA, Beger M. Comparing spatial conservation prioritization methods with site- versus spatial dependency-based connectivity. Conserv Biol 2023; 37:e14008. [PMID: 36178033 DOI: 10.1111/cobi.14008] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 08/03/2022] [Accepted: 09/09/2022] [Indexed: 06/16/2023]
Abstract
Larval dispersal is an important component of marine reserve networks. Two conceptually different approaches to incorporate dispersal connectivity into spatial planning of these networks exist, and it is an open question as to when either is most appropriate. Candidate reserve sites can be selected individually based on local properties of connectivity or on a spatial dependency-based approach of selecting clusters of strongly connected habitat patches. The first acts on individual sites, whereas the second acts on linked pairs of sites. We used a combination of larval dispersal simulations representing different seascapes and case studies of biophysical larval dispersal models in the Coral Triangle region and the province of Southeast Sulawesi, Indonesia, to compare the performance of these 2 methods in the spatial planning software Marxan. We explored the reserve design performance implications of different dispersal distances and patterns based on the equilibrium settlement of larvae in protected and unprotected areas. We further assessed different assumptions about metapopulation contributions from unprotected areas, including the case of 100% depletion and more moderate scenarios. The spatial dependency method was suitable when dispersal was limited, a high proportion of the area of interest was substantially degraded, or the target amount of habitat protected was low. Conversely, when subpopulations were well connected, the 100% depletion was relaxed, or more habitat was protected, protecting individual sites with high scores in metrics of connectivity was a better strategy. Spatial dependency methods generally produced more spatially clustered solutions with more benefits inside than outside reserves compared with site-based methods. Therefore, spatial dependency methods potentially provide better results for ecological persistence objectives over enhancing fisheries objectives, and vice versa. Different spatial prioritization methods of using connectivity are appropriate for different contexts, depending on dispersal characteristics, unprotected area contributions, habitat protection targets, and specific management objectives. Comparación entre los métodos de priorización de la conservación espacial con sitio y la conectividad espacial basada en la dependencia.
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Affiliation(s)
- Dominic Muenzel
- School of Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Kay Critchell
- School of Life and Environmental Sciences, Centre for Integrative Ecology, Deakin University, Geelong, Victoria, Australia
| | | | | | - Raymond Jakub
- Rare, Arlington, Virginia, USA
- Rare Indonesia, Bogor, Indonesia
| | | | - Nils Krueck
- Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Tasmania, Australia
| | - Daniel Holstein
- Department of Oceanography and Coastal Science, Louisiana State University, Baton Rouge, Louisiana, USA
| | - Eric A Treml
- School of Life and Environmental Sciences, Centre for Integrative Ecology, Deakin University, Geelong, Victoria, Australia
| | - Maria Beger
- School of Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK
- Centre for Biodiversity and Conservation Science, School of Biological Sciences, University of Queensland, Brisbane, Queensland, Australia
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Muenzel D, Martino S. Assessing the feasibility of carbon payments and Payments for Ecosystem Services to reduce livestock grazing pressure on saltmarshes. J Environ Manage 2018; 225:46-61. [PMID: 30071366 DOI: 10.1016/j.jenvman.2018.07.060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Revised: 07/10/2018] [Accepted: 07/17/2018] [Indexed: 06/08/2023]
Abstract
Saltmarshes provide important services including flood control, climate regulation, and provisioning services when grazed by livestock for agriculture and conservation purposes. Grazing diminishes aboveground carbon, creating a trade-off between these two services. Furthermore, saltmarshes are threatened by overgrazing. To provide saltmarsh protection and ensure the continuing delivery of ecosystem services, there is a need to incentivise land managers to stock environmentally sensible densities. We therefore investigated the possibility of agri-environmental schemes and Payments for Ecosystem Services (PES) to compensate for lost livestock revenue under reduced grazing regimes and provide carbon sequestration and other benefits. This is the first study to consider the benefits arising from a potential carbon market to saltmarshes, although similar schemes exist for peatland and woodland. We calculated the net economic benefit (costs of livestock production are removed from revenue) to farmers obtained from a hectare of grazed saltmarsh under low (0.3 Livestock Units per hectare per year), moderate (0.6), high (1.0) and very high (2.0) stocking densities accounting for livestock revenue, carbon benefits, and agri-environmental subsidies. We repeated the procedure considering additional benefits transferred from the literature in terms of provisioning, regulating and cultural ecosystem services provided by protected saltmarshes. The net benefits were assessed for a range of market carbon prices and social costs of carbon, e.g. the opportunity cost of carbon for society. Applying the model to Scottish saltmarshes we find that the current range of market prices could prompt transitions from high to moderate regimes in areas where livestock value is low, however break-even prices for transitions showed high spatial variability due to spatial variability in livestock values. In some areas of the West Highlands, the break-even carbon price is negative, indicating that the current agri-environmental schemes are able to more than compensate for the lost revenue accruing to farmers by a reduced grazing density. However, in other areas, such as the Outer Hebrides, the break-even carbon price is positive. Private PES schemes or increased public subsidies should then be provided to generate net benefits. It is reasonable to infer that a pure carbon market may have limited scope in incentivising consumers to buy carbon services, especially in areas with limited local number of buyers and corporates of small size. Under this circumstance, a premium carbon market offering bundled ecosystem services may help reduce grazing pressure across a larger number of Scottish saltmarshes, thereby providing globally important climate regulation services and at the same time protecting sensitive habitats.
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Affiliation(s)
- Dominic Muenzel
- Scottish Association for Marine Science, Laurence Mee Centre for Society & Sea, Oban, PA37 1QA, Scotland, UK.
| | - Simone Martino
- Scottish Association for Marine Science, Laurence Mee Centre for Society & Sea, Oban, PA37 1QA, Scotland, UK; University of York, Department of Environment and Geography, 290 Wentworth Way, Heslington, York, YO10 5NG, UK.
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Riederer I, Sauter A, Renz M, Dangelmaier J, Kirschke J, Fingerle A, Rummeny E, Noel P, Muenzel D. Dual-layer Spektral-CT versus MRT bei der Differenzierung zwischen Hämorrhagie und Kontrastmittelextravasation nach mechanischer Rekanalisation. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600404] [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: 10/19/2022]
Affiliation(s)
- I Riederer
- Klinikum rechts der Isar, Technische Universität München, Diagnostische und Interventionelle Radiologie, München
| | - A Sauter
- Klinikum rechts der Isar, Technische Universität München, Diagnostische und interventionelle Radiologie, München
| | - M Renz
- Klinikum rechts der Isar, Technische Universität München, Diagnostische und interventionelle Radiologie, München
| | - J Dangelmaier
- Klinikum rechts der Isar, Technische Universität München, Diagnostische und interventionelle Radiologie, München
| | - J Kirschke
- Klinikum rechts der Isar, Technische Universität München, Diagnostische und interventionelle Neuroradiologie, München
| | - A Fingerle
- Klinikum rechts der Isar, Technische Universität München, Diagnostische und interventionelle Radiologie, München
| | - E Rummeny
- Klinikum rechts der Isar, Technische Universität München, Diagnostische und interventionelle Radiologie, München
| | - P Noel
- Klinikum rechts der Isar, Technische Universität München, Diagnostische und interventionelle Radiologie, München
| | - D Muenzel
- Klinikum rechts der Isar, Technische Universität München, Diagnostische und interventionelle Radiologie, München
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Gramer BM, Muenzel D, Leber V, Rummeny EJ, Huber AM. Verbesserung von CNR und SNR bei der dynamischen Myokardperfusionsuntersuchung in der Computertomografie durch einen neuen iterativen Rekonstruktionsalgorithmus in einem Tiermodell. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1346472] [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: 10/26/2022]
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Leber V, Leber AW, Muenzel D, Gramer B, Vembar M, Rummeny E, Huber A. CT-Perfusionsuntersuchung des Myokards mit einem 256-Zeilen CT Scanner im Vergleich zur selektiven Koronarangiographie. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311094] [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: 10/28/2022]
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Muenzel D, Noel PB, Dorn F, Dobritz M, Rummeny EJ, Huber A. Step and shoot coronary CT angiography using 256-slice CT: effect of heart rate and heart rate variability on image quality. Eur Radiol 2011; 21:2277-84. [PMID: 21710267 DOI: 10.1007/s00330-011-2185-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2011] [Revised: 04/21/2011] [Accepted: 05/09/2011] [Indexed: 11/27/2022]
Abstract
OBJECTIVE To evaluate the effect of heart rate variability (HRV) and heart rate (HR) on intra-image "motion" and inter-image "stairstep" artefacts in step-and-shoot coronary CT angiography (CCTA) using a wide detector CT scanner. METHODS 66 patients underwent step-and-shoot CCTA using 256-slice CT. Patients were divided into two groups (Group 1: HR <65 bpm, Group 2 ≥65bpm). Motion artefacts were quantified using a 5-point-scale. Stairstep artefacts were defined by measurements of misalignment. Image noise, contrast-to-noise-ratio (CNR), signal-to-noise-ratio (SNR), and radiation dose were assessed. RESULTS Mean HR was 66 ± 16.7 bpm (range: 45-125 bpm) and mean HRV was 10.7 ± 17.5 bpm. A significant correlation between HR and stairstep artefacts (r = 0.46, p < 0.001) and motion artefacts (r = 0.63, p < 0.001) was found. Group 2 showed significantly increased step artefacts with a mean misalignment of 1.4 mm compared to 0.4 mm in Group 1 (p < 0.001). There was no significant effect of HRV on stairstep artefacts (r = 0.15, p = 0.416) and motion artefacts (r = 0.13, p = 0.311). No significant differences in image noise, CNR, SNR, and radiation dose were seen. CONCLUSIONS Unlike CCTA using narrow CT detectors, HRV has no significant effect on motion and stairstep artefacts using a wide CT detector with high z-coverage. However, a higher HR still increases stairstep and motion artefacts.
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Affiliation(s)
- D Muenzel
- Department of Radiology, Klinikum rechts der Isar der Technischen Universität München, Ismaninger Strasse 22, 81675 Munich, Germany.
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Muenzel D, Noell P, Dorn F, Dobritz M, Rummeny E, Huber A. Herzfrequenz und Herzfrequenzvariabilität - was für eine Einfluss haben sie auf die Bildqualität bei der CT Koronarangiographie mit einem 256 Zeilen CT Scanner? ROFO-FORTSCHR RONTG 2011. [DOI: 10.1055/s-0031-1279574] [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: 10/18/2022]
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Muenzel D, Noell P, Dorn F, Dobritz M, Rummeny E, Huber A. „Chest pain“ CT Untersuchungen mit prospektiver EKG-Triggerung: erste Erfahrungen mit einem 256 Zeilen CT Scanner. ROFO-FORTSCHR RONTG 2011. [DOI: 10.1055/s-0031-1279570] [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: 10/18/2022]
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Dorn F, Muenzel D, Liebig T, Meier R, Rummeny E, Huber A. Multimodale CT in der Diagnostik des akuten Schlaganfalls: hat die Reihenfolge (CT Angiographie vor oder nach der CT Perfusion) einen Einfluss auf die Bildqualität? ROFO-FORTSCHR RONTG 2011. [DOI: 10.1055/s-0031-1279212] [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: 10/18/2022]
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Huber A, Muenzel D, Noell P, Schneider A, Renz V, Leber A, Braren R, Preissl A, Vembar M, Rummeny E. Dynamische Untersuchung der Myokardperfusion mit einem 256-Zeilen CT am Tiermodell. ROFO-FORTSCHR RONTG 2011. [DOI: 10.1055/s-0031-1279150] [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: 10/18/2022]
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Deutsch M, Martetschlaeger F, Muenzel D, D'Haese J, Krane M, Bauernschmitt R, Lange R, Bumm R. Combined Spontaneous Contralateral Pneumothorax and Post-Pneumonectomy Mediastinal Shift-Associated Dextrocardia. Thorac Cardiovasc Surg 2011; 59:60-2. [DOI: 10.1055/s-0030-1250202] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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15
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Dorn F, Muenzel D, Rummeny E, Huber A. Mehr klinische Information durch mehr Zeilen? Untersuchung der cerebralen Perfusion mit einem 256-Zeilen CT-Gerät. ROFO-FORTSCHR RONTG 2010. [DOI: 10.1055/s-0030-1253056] [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: 10/19/2022]
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16
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Muenzel D, Duetsch S, Fauser C, Slotta-Huspenina J, Gaa J, Rummeny EJ, Holzapfel K. Diffusion-weighted magnetic resonance imaging in cervical lymphadenopathy: report of three cases of patients with Bartonella henselae infection mimicking malignant disease. Acta Radiol 2009; 50:914-6. [PMID: 19636985 DOI: 10.1080/02841850903061445] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Diffusion-weighted MR imaging is a potential technique for differentiation between benign and malignant lymph nodes. However, lympadenopathy caused by Bartonella henselae infection showes low ADC values in diffusion weighted MRI as typically seen in malignant disease.
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Affiliation(s)
- D. Muenzel
- Department of Radiology, Klinikum rechts der Isar, Technische Universitaet Muenchen, Munich, Germany
| | - S. Duetsch
- Department of Otorhinolaryngology, Klinikum rechts der Isar, Technische Universitaet Muenchen, Munich, Germany
| | - C. Fauser
- Department of Otorhinolaryngology, Klinikum rechts der Isar, Technische Universitaet Muenchen, Munich, Germany
| | - J. Slotta-Huspenina
- Department of Pathology, Klinikum rechts der Isar, Technische Universitaet Muenchen, Munich, Germany
| | - J. Gaa
- Department of Radiology, Klinikum rechts der Isar, Technische Universitaet Muenchen, Munich, Germany
| | - E. J. Rummeny
- Department of Radiology, Klinikum rechts der Isar, Technische Universitaet Muenchen, Munich, Germany
| | - K. Holzapfel
- Department of Radiology, Klinikum rechts der Isar, Technische Universitaet Muenchen, Munich, Germany
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