Motion-Aware Mosaicing for Confocal Laser Endomicroscopy

Mahé, Jessie; Linard, Nicolas; Tafreshi, Marzieh Kohandani; Vercauteren, Tom; Ayache, Nicholas; Lacombe, F.; Cuingnet, Rémi

doi:10.1007/978-3-319-24553-9_55

Cited by 6 publications

(8 citation statements)

References 23 publications

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“…This allows us to obtain an intuitive geometrical interpretation of the distance between warpings as the maximum deviation in terms of Euclidean distance over the set of reference points X . After having found estimates of the absolute warpings by solving (2), a final mosaic can be created with blending algorithms [7,15]. In this paper, we focus on the accurate assessment of the global warpings, i.e.…”

Section: Problem Statementmentioning

confidence: 99%

Retrieval and registration of long-range overlapping frames for scalable mosaicking of in vivo fetoscopy

et al. 2018

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PurposeThe standard clinical treatment of Twin-to-Twin transfusion syndrome consists in the photo-coagulation of undesired anastomoses located on the placenta which are responsible to a blood transfer between the two twins. While being the standard of care procedure, fetoscopy suffers from a limited field-of-view of the placenta resulting in missed anastomoses. To facilitate the task of the clinician, building a global map of the placenta providing a larger overview of the vascular network is highly desired.MethodsTo overcome the challenging visual conditions inherent to in vivo sequences (low contrast, obstructions or presence of artifacts, among others), we propose the following contributions: (1) robust pairwise registration is achieved by aligning the orientation of the image gradients, and (2) difficulties regarding long-range consistency (e.g. due to the presence of outliers) is tackled via a bag-of-word strategy, which identifies overlapping frames of the sequence to be registered regardless of their respective location in time.ResultsIn addition to visual difficulties, in vivo sequences are characterised by the intrinsic absence of gold standard. We present mosaics motivating qualitatively our methodological choices and demonstrating their promising aspect. We also demonstrate semi-quantitatively, via visual inspection of registration results, the efficacy of our registration approach in comparison with two standard baselines.ConclusionThis paper proposes the first approach for the construction of mosaics of placenta in in vivo fetoscopy sequences. Robustness to visual challenges during registration and long-range temporal consistency are proposed, offering first positive results on in vivo data for which standard mosaicking techniques are not applicable.Electronic supplementary materialThe online version of this article (10.1007/s11548-018-1728-4) contains supplementary material, which is available to authorized users.

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Section: Problem Statementmentioning

confidence: 99%

Retrieval and registration of long-range overlapping frames for scalable mosaicking of in vivo fetoscopy

et al. 2018

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“…Mahé et al entwickelten eine Bildverarbeitungsmethode, die eine Visualisierung von bewegenden Strukturen wie Blutzellen in Kapillaren verbessert und so eine dynamische Darstellung des abgebildeten Gewebes ermöglicht [35]. Weitere Ansätze verfolgten das Prinzip einer automatisierten Klassifikation von CLE-Bildern mit dem Ziel, die Standardauswertung zu verbessern und die CLE mit weniger Schulungsaufwand in der alltäglichen Praxis anwendbar zu machen [23].…”

Section: Computergestützte Auswertungunclassified

Konfokale Laser-Endomikroskopie des Kopf-Hals-Plattenepithelkarzinoms: eine systematische Übersicht

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Auberville

Oetter

et al. 2021

Laryngorhinootologie

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Zusammenfassung Hintergrund Die konfokale Laser-Endomikroskopie (CLE) bietet mit einer bis zu 1000-fachen Vergrößerungsleistung die Möglichkeit, Interzellularräume in vivo zu erkennen. Die CLE hat sich in verschiedensten Fachbereichen bereits etabliert. Dieser Artikel gibt einen Überblick über die aktuelle Studienlage der CLE in der Diagnostik des Plattenepithelkarzinoms des Kopf-Hals-Bereichs. Material und Methoden Systematische Literaturrecherche in folgenden Online-Datenbanken: PubMed, MEDLINE, Thompson Reuters Web of Science, SPIE nach den Suchbegriffen: confocal laser endomicroscopy, CLE, endomicroscopy, head and neck, larynx. Bewertung der wissenschaftlichen Relevanz der Arbeiten nach festgelegten Kriterien. Ergebnisse Es wurden Arbeiten in Bezug auf die klinische Anwendung, die klinische Befunderhebung und die computergestützte Datenauswertung analysiert. Schlussfolgerungen In Zusammenschau der aktuell publizierten Ergebnisse verspricht die CLE ein großes Potenzial, die Diagnostik maligner Schleimhautveränderungen im Bereich des oberen Aerodigestivtrakts zu verbessern.

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“…Computer-aided detection of vascular structures may be a more advanced approach. Mahé et al developed an image processing method that enhances visualization of moving structures such as blood cells in capillaries, providing a dynamic representation of the imaged tissue [24]. Dittberner et al demonstrated that classification of CLE scans into normal and malignant altered tissue is possible based on an estimate of mean cell sizes [25].…”

Section: Discussionmentioning

confidence: 99%

Impact of intraepithelial capillary loops and atypical vessels in confocal laser endomicroscopy for the diagnosis of laryngeal and hypopharyngeal squamous cell carcinoma

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Eckstein

Mantsopoulos

et al. 2021

Eur Arch Otorhinolaryngol

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Purpose Confocal laser endomicroscopy (CLE) allows surface imaging of the laryngeal and pharyngeal mucosa in vivo at a thousand-fold magnification. This study aims to compare irregular blood vessels and intraepithelial capillary loops in healthy mucosa and squamous cell carcinoma (SCC) via CLE. Materials and methods We included ten patients with confirmed SCC and planned total laryngectomy in this study between March 2020 and February 2021. CLE images of these patients were collected and compared with the corresponding histology in hematoxylin and eosin staining. We analyzed the characteristic endomicroscopic patterns of blood vessels and intraepithelial capillary loops for the diagnosis of SCC. Results In a total of 54 sequences, we identified 243 blood vessels which were analyzed regarding structure, diameter, and Fluorescein leakage, confirming that irregular, corkscrew-like vessels (24.4% vs. 1.3%; P < .001), dilated intraepithelial capillary loops (90.8% vs. 28.7%; P < .001), and increased capillary leakage (40.7% vs. 2.5%; P < .001), are significantly more frequently detected in SCC compared to the healthy epithelium. We defined a vessel diameter of 30 μm in capillary loops as a cut-off value, obtaining a sensitivity, specificity, PPV, and NPV and accuracy of 90.6%, 71.3%, 57.4%, 94.7%, and 77.1%, respectively, for the detection of malignancy based solely on capillary architecture. Conclusion Capillaries within malignant lesions are fundamentally different from those in healthy mucosa regions. The capillary architecture is a significant feature aiding the identification of malignant mucosa areas during in-vivo, real-time CLE examination.

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Motion-Aware Mosaicing for Confocal Laser Endomicroscopy

Cited by 6 publications

References 23 publications

Retrieval and registration of long-range overlapping frames for scalable mosaicking of in vivo fetoscopy

Retrieval and registration of long-range overlapping frames for scalable mosaicking of in vivo fetoscopy

Konfokale Laser-Endomikroskopie des Kopf-Hals-Plattenepithelkarzinoms: eine systematische Übersicht

Impact of intraepithelial capillary loops and atypical vessels in confocal laser endomicroscopy for the diagnosis of laryngeal and hypopharyngeal squamous cell carcinoma

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