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Related Concept Videos

Imaging Studies IV: Magnetic Resonance Imaging01:27

Imaging Studies IV: Magnetic Resonance Imaging

Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...

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MR Molecular Imaging of Prostate Cancer with a Small Molecular CLT1 Peptide Targeted Contrast Agent
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Published on: September 3, 2013

Imaging prostate cancer lymph node metastases with a multimodality contrast agent.

Mary A Hall1, Sunkuk Kwon, Holly Robinson

  • 1Center for Molecular Imaging, The Brown Foundation Institute of Molecular Medicine, The University of Texas Health Science Center, Houston, Texas, USA.

The Prostate
|May 4, 2011
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A new dual-labeled agent aids in detecting prostate cancer lymph node metastases. This multimodality approach shows promise for improved intraoperative guidance and early diagnosis of metastatic disease.

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Published on: August 14, 2012

Area of Science:

  • Oncology
  • Medical Imaging
  • Nanotechnology

Background:

  • Current methods for detecting lymph node (LN) metastases in prostate cancer (PCa) are limited.
  • Pelvic LN dissection during prostatectomy can lead to complications.
  • There is a need for improved methods to detect LN invasion in PCa.

Purpose of the Study:

  • To develop and evaluate a dual-labeled targeting agent for detecting prostate cancer LN metastases.
  • To assess the agent's utility for both intraoperative guidance and conventional imaging.

Main Methods:

  • A dual-labeled antibody (Ab) was developed, combining a near-infrared (NIR) fluorophore and a (64)Cu radiotracer.
  • The agent targeted epithelial cell adhesion molecule and was tested in a mouse model with orthotopically implanted human PCa cells.
  • Imaging was performed using NIR fluorescence and micro-positron emission tomography/computed tomography (µPET/CT).

Main Results:

  • Metastases to lumbar LNs were detected by NIR fluorescence and pathology in 75% of mice.
  • NIR imaging detected 63% of metastases, comparable to µPET/CT (64%).
  • No significant difference was observed between NIR imaging and µPET/CT in detecting LN metastases.

Conclusions:

  • A multimodality contrast agent is effective for early detection of metastatic prostate cancer.
  • The agent has potential applications in intraoperative PCa treatment.
  • Further optimization is needed to enhance specificity and validate for other epithelial cancers with LN metastasis.