Act and Artifact

Bolger, William E.; Bolger, Bill

doi:10.2307/20624602

Cited by 14 publications

(9 citation statements)

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“…Semiquantitative assessment of valve regurgitation is not necessarily accurate for estimating the degree of the regurgitation at least partially because the regurgitant jet is subject to hemodynamics and other factors [11,12]. Because we have not correlated the size of regurgitant jet with the established index of the degree of regurgitation in this study, we cannot comment on the clinical value of DCPD regurgitant jet size assessment.…”

Section: Standard Echo Total Reg (+)mentioning

confidence: 82%

Hand-Carried Echocardiography in Assessing Ventricular Function and Valvular Regurgitation

et al. 2004

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Section: Standard Echo Total Reg (+)mentioning

confidence: 82%

Hand-Carried Echocardiography in Assessing Ventricular Function and Valvular Regurgitation

et al. 2004

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“…Da die Haller'schen Zellen lateral des Infundibulums gelegen sind, können diese auch bei einer diagnostischen Nasenendoskopie nicht erkannt werden, sehr wohl jedoch im Rahmen der Kieferhöhlenendoskopie. Das Vorliegen einer Haller'schen Zelle kann jedoch sehr leicht anhand von koronaren CT-Bildem, die zur Vermeidung von Komplikationen sowieso intraoperativ vorliegen sollen, erkannt werden (2,5). Für die endonasale Rhinochirurgie ergibt sich, daB die Haller'schen Zellen weit erdffnet werden müssen, urn dadurch die Engstelle im Bereich des Kieferhöhlenostiurns zu beseitigen.…”

Section: Einieitungunclassified

Die Haller'sehen Zellen: Morphologische Evaluierung und klinisch-chirurgische Bedeutung*

Kainz

Braun²,

Genser³

1993

Laryngo-Rhino-Otol

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Ethmoidal cells that have developed into the floor of the orbit or into the roof of the maxillary sinus, respectively, are known as Haller's cells. 528 patients, in whom functional endoscopic sinus surgery was performed, were explored regarding the presence of Haller's cells. 43 patients presented with Haller's cells at least on one side (8.14%). CT scans of these patients were evaluated morphometrically measuring the dimensions of the Haller's cells as well as of the maxillary sinus. Further anatomical variations of the paranasal sinuses (concha bullosa, supraorbital cell, agger nasi cell) and the keros type of the ethmoid sinus roof were seen. A highly significant difference could be demonstrated between the incidence of Haller's cells in men (4.9%) and women (11.9%). For the first time it was possible to demonstrate a frequency distribution between Haller's cells deriving from the anterior ethmoidal cells (88%) and those originating from the posterior ethmoidal cells (12%). In 56% Haller's cells were opacified on CT-scan showing a mucosal swelling respectively a retention of secretion during endoscopic surgery.

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“…However, they are susceptible to differences in camera angle, scale, and cropping (Matthé et al, 2017), and are therefore unsuitable for animals that cannot be caught and photographed using a standardised methodology. By contrast, feature-based software packages, such as Wild-ID (Bolger, 2012), I 3 S-Pattern (Reijns, 2014) and Hotspotter (Crall et al, 2013), match images based on unique features including spots, stripes, blotches, or other marks. The algorithms that featurebased packages use vary, but all have a higher tolerance to differences in camera angle, scale, and lighting conditions than pixel-based algorithms.…”

Section: Introductionmentioning

confidence: 99%

Optimising the automated recognition of individual animals to support population monitoring

Lorm

Horswill

Rabaiotti

et al. 2023

Preprint

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Reliable estimates of population size and demographic rates are central to assessing the status of threatened species. However, obtaining individual-based demographic rates requires long-term data, which is often costly and difficult to collect. Photographic data offer an inexpensive, non-invasive method for individual-based monitoring of species with unique markings, and could therefore increase available demographic data for many species. However, selecting suitable images and identifying individuals from photographic catalogues is prohibitively time-consuming. Automated identification software can significantly speed up this process. Nevertheless, automated methods for selecting suitable images are lacking, as are studies comparing the performance of the most prominent identification software packages. In this study, we develop a framework that automatically selects images suitable for individual identification, and compare the performance of three commonly used identification software packages; Hotspotter, I3S-Pattern, and WildID. As a case study, we consider the African wild dog Lycaon pictus, a species whose conservation is limited by a lack of cost-effective large-scale monitoring. To evaluate intra-specific variation in the performance of software packages, we compare identification accuracy between two populations (in Kenya and Zimbabwe) that have markedly different coat colouration patterns. The process of selecting suitable images was automated using Convolutional Neural Nets that crop individuals from images, filter out unsuitable images, separate left and right flanks, and remove image backgrounds. Hotspotter had the highest image-matching accuracy for both populations. However, the accuracy was significantly lower for the Kenyan population (62%), compared to the Zimbabwean population (88%). Our automated image pre-processing has immediate application for expanding monitoring based on image-matching. However, the difference in accuracy between populations highlights that population-specific detection rates are likely and may influence certainty in derived statistics. For species such as the African wild dog, where monitoring is both challenging and expensive, automated individual recognition could greatly expand and expedite conservation efforts.

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Act and Artifact

Cited by 14 publications

References 0 publications

Hand-Carried Echocardiography in Assessing Ventricular Function and Valvular Regurgitation

Hand-Carried Echocardiography in Assessing Ventricular Function and Valvular Regurgitation

Die Haller'sehen Zellen: Morphologische Evaluierung und klinisch-chirurgische Bedeutung*

Optimising the automated recognition of individual animals to support population monitoring

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