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Fully automatic detection of renal cysts in abdominal CT scans

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International Journal of Computer Assisted Radiology and Surgery Aims and scope Submit manuscript

Abstract

Purpose

Simple renal cysts are a common benign finding in abdominal CT scans. However, since they may evolve in time, simple cysts need to be reported. With an ever-growing number of slices per CT scan, cysts are easily overlooked by the overloaded radiologist. In this paper, we address the detection of simple renal cysts as an incidental finding in a real clinical setting.

Methods

We propose a fully automatic framework for renal cyst detection, supported by a robust segmentation of the kidneys performed by a fully convolutional neural network. A combined 3D distance map of the kidneys and surrounding fluids provides initial candidates for cysts. Eventually, a second convolutional neural network classifies the candidates as cysts or non-cyst objects.

Results

Performance was evaluated on 52 abdominal CT scans selected at random in a real radiological workflow and containing over 70 cysts annotated by an experienced radiologist. Setting the minimal cyst diameter to 10 mm, the algorithm detected 59/70 cysts (true-positive rate = 84.3%) while producing an average of 1.6 false-positive per case.

Conclusions

The obtained results suggest the proposed framework is a promising approach for the automatic detection of renal cysts as incidental findings of abdominal CT scans.

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Authors and Affiliations

  1. Department of Electrical Engineering, Tel-Aviv University, Ramat-Aviv, Israel

    Neta Blau & Nahum Kiryati

  2. Diagnostic Imaging Institute, Sheba Medical Center, Affiliated with Sackler School of Medicine, Tel Aviv University, Tel-Aviv, Israel

    Eyal Klang, Marianne Amitai, Orith Portnoy & Arnaldo Mayer

Authors
  1. Neta Blau
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  2. Eyal Klang
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  3. Nahum Kiryati
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  4. Marianne Amitai
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  5. Orith Portnoy
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  6. Arnaldo Mayer
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Corresponding author

Correspondence to Arnaldo Mayer.

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The authors declare that they have no conflict of interest.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.

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Cite this article

Blau, N., Klang, E., Kiryati, N. et al. Fully automatic detection of renal cysts in abdominal CT scans. Int J CARS 13, 957–966 (2018). https://doi.org/10.1007/s11548-018-1726-6

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  • DOI: https://doi.org/10.1007/s11548-018-1726-6

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