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Related Concept Videos

Radiological Investigation III: Pulmonary Angiogram and PET Scan01:13

Radiological Investigation III: Pulmonary Angiogram and PET Scan

Radiological investigations are paramount in the diagnosis and management of various pulmonary diseases. Two essential investigations are the Pulmonary Angiogram and the Positron Emission Tomography (PET) Scan.
Pulmonary Angiogram
A Pulmonary Angiogram is an invasive procedure involving injecting a contrast medium through a catheter threaded into the pulmonary artery or the right side of the heart to visualize the pulmonary vasculature. Computed Tomography (CT) scans have mainly replaced this...
Hypoxia01:23

Hypoxia

Hypoxia is a medical condition characterized by an inadequate oxygen supply to body tissues. It typically manifests as a bluish discoloration of the skin and mucosae, especially in fair-skinned individuals, when hemoglobin (Hb) saturation drops below 75%.
Types of Hypoxia
There are four primary types of hypoxia, each resulting from a different cause:
1. Anemic hypoxia: This type occurs due to insufficient oxygen delivery caused by a lack of red blood cells (RBCs) or RBCs with abnormal or...

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Related Experiment Video

Updated: Jun 8, 2026

Tumor Hypoxia Assessment: In Vivo 3D Oxygen Imaging Through Electron Paramagnetic Resonance
07:07

Tumor Hypoxia Assessment: In Vivo 3D Oxygen Imaging Through Electron Paramagnetic Resonance

Published on: February 14, 2025

Tumor hypoxia imaging.

Xilin Sun1,2, Gang Niu3,4, Nicholas Chan1

  • 1Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), 31 Center Drive, Suite 1C14, Bethesda, MD, 20892-2281, USA.

Molecular Imaging and Biology
|September 15, 2010
PubMed
Summary
This summary is machine-generated.

Accurately measuring tumor hypoxia is crucial for understanding cancer aggressiveness and treatment response. This review covers various methods, highlighting advanced noninvasive imaging techniques for better therapeutic prediction.

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Non-Invasive PET/MR Imaging in an Orthotopic Mouse Model of Hepatocellular Carcinoma

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Area of Science:

  • Oncology
  • Medical Imaging
  • Biomedical Engineering

Background:

  • Tumor hypoxia, a state of low oxygen levels within tumors, is a critical factor influencing cancer progression and treatment resistance.
  • Accurate assessment of tumor hypoxia is essential for predicting therapeutic outcomes and tailoring treatment strategies.
  • Existing methods for measuring tissue oxygenation vary in invasiveness and applicability.

Purpose of the Study:

  • To review and critically evaluate current invasive and noninvasive techniques for measuring tumor hypoxia.
  • To discuss the advantages and limitations of each method.
  • To emphasize the potential of emerging noninvasive imaging technologies and novel agents for hypoxia detection.

Main Methods:

  • Review of existing literature on tumor hypoxia measurement techniques.
  • Categorization of methods into invasive (e.g., polarographic electrodes, immunohistochemistry) and noninvasive (e.g., PET, SPECT, MRI, optical imaging).
  • Discussion of the principles, applications, and limitations of each imaging modality.

Main Results:

  • Various techniques, including polarographic needle electrodes, immunohistochemical staining, PET, SPECT, MRI, and optical imaging, are available for hypoxia assessment.
  • Each method presents a unique set of advantages and disadvantages regarding accuracy, invasiveness, and clinical applicability.
  • Noninvasive imaging modalities, particularly with new agents and technologies, show significant promise for real-time molecular event detection related to hypoxia.

Conclusions:

  • A comprehensive understanding of available hypoxia measurement techniques is vital for clinical decision-making.
  • Noninvasive imaging approaches offer a promising avenue for improved tumor hypoxia assessment and therapeutic monitoring.
  • Future research should focus on developing and validating advanced noninvasive imaging tools for precise hypoxia evaluation.