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A loading dose is an essential pharmacological strategy to rapidly achieve the target plasma drug concentration necessary for an immediate therapeutic effect. This approach is especially critical for drugs characterized by slow absorption or extended half-lives, where delaying therapeutic plasma levels could compromise treatment outcomes. By administering a loading dose, clinicians ensure a prompt onset of drug action, even for agents with complex pharmacokinetic profiles.Achieving steady-state...
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Related Experiment Video

Updated: May 2, 2026

Pretargeted Radioimmunotherapy Based on the Inverse Electron Demand Diels-Alder Reaction
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Understanding Current Trends and Advances in Transarterial Radioembolization Dosimetry.

Shamar Young1, Kiyon Naser-Tavakolian2, Abin Sajan2

  • 1Interventional Radiology, University of Arizona Tucson, Tucson, AZ 85724, USA.

Diagnostics (Basel, Switzerland)
|January 10, 2026
PubMed
Summary

Advanced dosimetry in transarterial radioembolization (TARE) improves outcomes for liver cancers like HCC. Personalized approaches, including partition and voxel-based methods, offer superior results compared to older techniques, supporting wider adoption.

Keywords:
Yttrium-90liver malignancypersonalized dosimetrytransarterial radioembolizationvoxel-based dosimetry

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Area of Science:

  • Interventional Radiology
  • Radiation Oncology
  • Medical Physics

Background:

  • Transarterial radioembolization (TARE) is a key treatment for liver malignancies.
  • Treatment success in TARE is significantly influenced by accurate radiation dosimetry.
  • Dosimetry has advanced from empirical methods to sophisticated partition and voxel-based approaches.

Purpose of the Study:

  • To review evidence on advanced (personalized) dosimetry in TARE across various liver tumor types.
  • To highlight emerging dose-response relationships and practical implementation challenges.
  • To compare different dosimetry methodologies, including MIRD, partition, and voxel-based approaches.

Main Methods:

  • A narrative review of peer-reviewed clinical studies and trials on TARE dosimetry.
  • Focus on hepatocellular carcinoma (HCC), intrahepatic cholangiocarcinoma (iCCA), metastatic colorectal cancer (mCRC), neuroendocrine tumor (NET), and breast cancer liver metastases.
  • Comparison of single-compartment MIRD, partition (multicompartment), and voxel-based dosimetry.

Main Results:

  • Personalized dosimetry demonstrably improves outcomes in multiple tumor types.
  • Partition-based dosing showed superior overall survival in HCC compared to MIRD.
  • Voxel-derived metrics correlate with tumor necrosis in HCC, and advanced dosimetry links higher doses to better response in iCCA and mCRC.

Conclusions:

  • Evidence strongly supports the broader adoption of advanced dosimetry in TARE.
  • Optimizing TARE may involve ensuring coverage of "cold" tumor regions and refining particle planning.
  • Standardization, prospective validation, and scalable workflows are crucial for accelerating implementation.