TissueGnostics is a solution provider for Precision Medicine and provides fully integrated cutting-edge tissue cytometers including a multitude of configurations from multispectral & high-throughput scanning to contextual tissue cytometry. The goal of TissueGnostics is to bring the same type of phenotypical analysis of single cells from Flow Cytometry into tissue context.
Analysis of immunohistochemical markers
HistoQuest provides four analysis modes:
- Cell-based (nucleus, cytoplasm, membrane)
- Stained areas
- Small dots (e.g. CISH)
- Skeleton algorithm for membrane staining
Context-based analysis can be done by manually drawing regions-of-interest. TMAs can be analysed and detected on imported files.
HistoQuest has importers for the following digital image or slide formats:
- Precipoint (.vmic, .gtif)
- Generic Big Tiff
- Images (.jpeg, .tif, .bmp, .png)
- Zeiss Axio Scan (.czi)
- Hamamatsu (.ndpi)
- Aperio (.svs)
- Leica (.scn)
- 3D Histech (.mrxs)
is integrated into the following TG systems:
- TissueFAXS SL
- TissueFAXS SL PLUS
- TissueFAXS Q+
- TissueFAXS PLUS
- TissueFAXS Histo
- TissueFAXS i PLUS
- TissueFAXS i Histo
HistoQuest is also available as a standalone software.
THE EASY SOLUTION FOR BRIGHTFIELD ANALYSIS
HistoQuest is a brightfield image analysis software for the FACS-like analysis of tissue sections, TMA or cultured cells processed with immunohistochemical or histochemical stains.
NEW FEATURES in HistoQuest 7.0
The new features of HistoQuest 7 include improvements to the analysis workflow, management of multiple diagrams, image visualization, and the user interface. Here are some highlights of 7.0:
- The new diagrams viewer displays all diagrams associated with a region or sample and allows the user to perform several new tasks, including changing the order of the diagrams via drag and drop, a print preview of the diagrams, set cut-offs, add gates, or show backward connections in the image.
- To further simplify the validation process it is now possible to open multiple samples or regions simultaneously in separate detail windows as well as their raw data, diagram details and diagrams viewer. A dedicated Detail Manager helps to stay organized.
- HistoQuest 7.0 comes with the new smoothen image function, for visual improvement of the image.
- New import formats are available now: OME-TIFF, Olympus VSI, BigTIFF and PreciPoint
- Another new feature is the introduction of the Human Protein Atlas Browser within our HistoQuest software. By simply pressing the Human Protein Atlas Button compare your obtained results to publicly available data.
TISSUE CYTOMETRY TECHNOLOGY
TissueGnostics introduced Tissue Cytometry technology into image analysis software more than a decade ago. While, at a first look, it may appear to be just another form of displaying data, there is much more to it. Combined with segmentation images it is also a simple and intuitive tool to visually validate results. TG calls this "Backward Gating". Backward gating can be done for any measured parameter on histograms and scattergrams. The following examples demonstrate the versatility of backward gating. In the left image backward gating is used to visualise cells in which the HER2/neu staining has a closure angle of more than 180 degrees. In the right image backward gating is used on segmented nuclei positive for Ki-67.
Morphological filtering using Tissue Cytometry technology combined with appropriate planning of the analysis provides a highly flexible and capable instrument for extracting specific data from a sample (see image below).
HistoQuest analysis automation
HistoQuests fully automated template-based analysis is optimised for clinical routine and research applications and allows complete walk away operation.
The user just has to load samples into the software and to decide whether they want the samples to be automatically detected (in which case analysis will start immediately), whether they want to be able to interfere with the automatic region detection (with validation) or whether they want to manually define regions-of interest.
A template provides:
- Segmentation settings for all objects to be detected
- A method for dealing with events in ROI
- Diagrams from the first sample of the project from which the template was saved
- Statistics report settings
- Simple report settings
- Small dots settings
HistoQuest image analysis algorithms
Brightfield images need to be separated into images according to their color components, HistoQuest provides two algorithms for color separation.
The first one automatically detects and separates two colors and an optional third one. The second color separation algorithm is semi-manual (using a color picker) and separates an unlimited amount of colors with great control and precision.
HistoQuest uses algorithms for nuclear and cell compartment segmentation. It also provides an algorithm for stained area detection as well as algorithms for the detection of dots inside of already detected cell compartments.
The nuclear segmentation algorithm is highly efficient in difficult situations in tissue and can be set with two values only - mean nuclear size and nuclear channel background threshhold. The cell compartment algorithm provides a large amount of flexibility with a few simple settings (yellow outline = segmented nuclei, blue outline = nuclei positive for DAB or cytoplasm positive for Permanent Red marker). The total area algorithm segments stained areas in a sample.
The dot algorithm provides small dot detection ideal for CISH, ISH and other applications in which the quantification of small objects within cellular compartments is needed. The images below show the quantification of EGFR RNA dots inside of the nuclear compartment. Simple context-based analysis can easily be done in HistoQuest by using manual region tools. Drawing the regions takes a negligible amount of time and provides data for epithelial areas and stroma separately in this example. The skeleton algorithm permits the detection of membrane stainings.
HistoQuest fully supports the analysis of Tissue Microarrays (TMA) scanned either with TissueFAXS systems or those slide scanners for which HistoQuest provides importers. For analysis projects of scans coming from TissueFAXS systems the autodetected TMA regions will be imported. For scans imported from other scanning systems without detected regions the TMA autodetection feature is also available in HistoQuest.
HistoQuest Data Export capabilities
HistoQuest provides four modes for the export of analysis data, ranging from simple prefabricated reports for internal presentations to selective data export from all analysis projects from a complete scientific project.
There is a special pathology-oriented data export feature for the small dot algorithm data, which has been built according to pathologists requirements for FISH analysis.
All TG data export modes write data to Excel, CSV and PDF formats.
Other HistoQuest features
HistoQuest features include a registration and comparative analysis capability for differently stained consecutive samples. Compare sets provide grouping features for multiple scattergrams and histograms as well as overlaying them.