Conformal mapping of nuclei in 3D tomographic cell images to assess shape heterogeneity

Vivek Nandakumar, Xing An, Yalin Wang, Roger Johnson, Deirdre Meldrum

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

Abstract

Nuclear shape and its heterogeneity are diagnostically important criteria used by pathologists in cancer diagnosis. Pathology assessment is currently qualitative and is based on 2D brightfield microscopy images. We propose an imaging informatics framework to quantify nuclear pleomorphism by statistical characterization of 3D nuclear shape. We applied optical projection tomographic microscopy (OPTM) to image individual hematoxylin and eosin-stained cells with isotropic, sub-micron spatial resolution. We used adaptive thresholding schemes to segment cells and nuclei, and applied spherical conformal mapping methods on the 3D nuclear masks to compute 256 rotation invariant coefficients as shape descriptors for each nucleus. As a first application, we tested our methods on normal and cancerous epithelial cell lines derived from human esophagus and breast, analyzing 10 cell images per class. We applied ANOVA techniques to assess variations in nuclear shape within each cell type and among the four cell types. The automated segmentation was 96% accurate compared to manual tracing of the volumes of interest. Statistical analysis of shape coefficients revealed that cancer cell nuclei from both organs exhibited considerably larger variance in their coefficients relative to the corresponding normal cell nuclei. Our results demonstrate the promise of our methodology for the development of quantitative pathological assessments.

Original languageEnglish (US)
Title of host publication2012 9th IEEE International Symposium on Biomedical Imaging
Subtitle of host publicationFrom Nano to Macro, ISBI 2012 - Proceedings
Pages222-225
Number of pages4
DOIs
StatePublished - 2012
Event2012 9th IEEE International Symposium on Biomedical Imaging: From Nano to Macro, ISBI 2012 - Barcelona, Spain
Duration: May 2 2012May 5 2012

Publication series

NameProceedings - International Symposium on Biomedical Imaging
ISSN (Print)1945-7928
ISSN (Electronic)1945-8452

Other

Other2012 9th IEEE International Symposium on Biomedical Imaging: From Nano to Macro, ISBI 2012
Country/TerritorySpain
CityBarcelona
Period5/2/125/5/12

Keywords

  • 3D cell imaging
  • cancer
  • computed tomography
  • conformal mapping
  • heterogeneity
  • shape analysis

ASJC Scopus subject areas

  • Biomedical Engineering
  • Radiology Nuclear Medicine and imaging

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