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Computerassistierte Diagnostik in der Zervixzytologie

Computer-assisted diagnostics in cervical cytology

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Zusammenfassung

Computerassistenz kann Screeningfehler reduzieren. Für die Zervixzytologie gibt es nur 2 Systeme: Das BD FocalPoint™ GS Imaging System (BD) verwendet Bilderkennungsalgorithmen, um Dünnschichtpräparate (Surepath, SP) und konventionelle Abstriche auszuwerten. Das ThinPrep® Imaging System basiert auf der densitometrischen Messung von Zellkernen. Diese Technik erfordert eine Dünnschichtpräparation. BD FocalPoint™ teilt die Präparate mit absteigender Wahrscheinlichkeit für das Vorliegen einer Auffälligkeit in 6 Gruppen ein. Eine weitere Option ist das „location guided screening“ (LGS). Hierbei werden an einem computerisierten Mikroskop die 15 Gesichtsfelder präsentiert, die mit höchster Wahrscheinlichkeit relevant sind. Mehrere Studien weisen darauf hin, dass mindestens eine Äquivalenz dieses Modus zum manuellen Screening bei konventionellen und SP-Präparaten besteht. Beim ThinPrep® Imaging System, das nur mit einem LGS-Modus arbeitet, fand die Mehrzahl der vorliegenden Studien eine signifikant höhere Sensitivität für histologisch bestätigte zervikale intraepitheliale Neoplasien vom Grad CIN 2 +. Allerdings hatten die meisten Studien ein retrospektives bzw. paralleles Design. Beide Systeme ermöglichen eine deutliche höhere Produktivität, setzen allerdings auch einen höheren technischen Gesamtaufwand voraus.

Abstract

Computer assistance has the ability to reduce screening errors. In cervical cytology only two systems are available: BD FocalPoint™ (BD) utilizes algorithms for image recognition to analyze thin-layer specimens (Surepath) and conventional slides. The ThinPrep® imaging system (Hologic) is based on the densitometric measurement of nuclei and requires a thin-layer preparation. The BD FocalPoint™ system assigns specimens according to declining probability of an abnormality to one of six groups. A further option is location-guided screening (LGS) where the 15 fields of view which are most relevant are presented on a computerized microscope. Several studies indicate that this mode is at least equivalent to manual screening with conventional and surepath (SP) slides. For the ThinPrep® imaging system which only uses the LGS mode the majority of available studies found a significantly higher sensitivity for histologically confirmed grade 2 cervical intraepithelial neoplasia (CIN 2 +). However, most were retrospective or parallel studies. Both systems allow a significantly higher productivity but require a higher technical expenditure.

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Der korrespondierende Autor weist auf folgende Beziehung/en hin: Der Autor ist gelegentlich Berater für und/oder hat Vortragshonorare/Reisekostenunterstützung von Abbott, B&D, Genprobe, Hologic, MTM, Qiagen, Roche erhalten.

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Correspondence to H. Ikenberg.

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Ikenberg, H. Computerassistierte Diagnostik in der Zervixzytologie. Pathologe 32, 476–483 (2011). https://doi.org/10.1007/s00292-011-1477-4

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