Feasibility study of tumor size classification via contrast-enhanced UWB breast imaging: A complex-domain analysis

S. W. Ahmad, Y. Chen, P. Kosmas, W.L. Woo, S.S. Dlay

Research output: Chapter in Book/Report/Conference proceedingConference paperpeer-review


Lesion classification using the tumor's backscatter signature can be very challenging in microwave breast imaging due to the small intrinsic contrast between the dielectric properties of dysplastic and normal tissues. A possible solution to this problem is to use microwave contrast agents such as microbubbles, where the differential breast response before and after the administration of the agent to a dysplastic inclusion is used to classify various anomaly properties (size, depth, morphology, etc.). In this paper, we study the feasibility of contrast-agent-aided imaging for lesion size classification by studying received signals in the complex domain. A finite-difference time-domain (FDTD) numerical phantom is employed to simulate electromagnetic (EM) wave propagation inside the breast and extract the reflected waveforms with and without microbubbles in the tumor site. The complex-domain transfer function of differential response is then used to draw the poles-zero plots (PZPs) and Bode plots (BPs), which demonstrate the viability of the proposed method for lesion size categorization.
Original languageEnglish
Title of host publicationGeneral Assembly and Scientific Symposium, 2011 XXXth URSI
Number of pages4
ISBN (Print)978-1-4244-5117-3
Publication statusPublished - Aug 2011
EventGeneral Assembly and Scientific Symposium, 2011 XXXth URSI - Istanbul, Turkey
Duration: 13 Aug 201120 Aug 2011


ConferenceGeneral Assembly and Scientific Symposium, 2011 XXXth URSI


  • biological organs
  • biological tissues
  • cellular biophysics
  • electromagnetic wave propagation
  • finite difference time-domain analysis
  • gynaecology
  • image classification
  • medical image processing
  • microwave imaging
  • phantoms
  • transfer functions
  • tumours
  • FDTD numerical phantom
  • bode plots
  • complex domain
  • complex-domain analysis
  • complex-domain transfer function
  • contrast-agent-aided imaging
  • contrast-enhanced UWB breast imaging
  • dielectric properties
  • dysplastic inclusion
  • dysplastic tissues
  • finite-difference time-domain numerical phantom
  • lesion size categorization
  • lesion size classification
  • microbubbles
  • microwave breast imaging
  • microwave contrast agents
  • poles-zero plots
  • tumor size classification
  • tumors backscatter signature
  • Breast
  • Dielectrics
  • Lesions
  • Microwave imaging
  • Microwave theory and techniques


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