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Related Experiment Videos

Glioblastoma oncometry.

L Harisiadis1, K Wechsler-Jentzsch, S Harisiadis

  • 1Department of Radiology, George Washington University Medical Center, Washington, D.C.

Strahlentherapie Und Onkologie : Organ Der Deutschen Rontgengesellschaft ... [Et Al]
|December 1, 1990
PubMed
Summary
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Glioblastoma tumor volume often changes after radiation therapy, impacting treatment planning. Repeat imaging is crucial for accurate boost field adjustments to avoid geographic misses.

Area of Science:

  • Neuroncology
  • Radiotherapy Physics
  • Medical Imaging

Background:

  • Glioblastomas require radiation therapy.
  • Assessing treatment response is critical.

Purpose of the Study:

  • To evaluate changes in glioblastoma computed tomography (CT) appearance post-radiation therapy.
  • To determine the prognostic value of early volume changes.
  • To assess implications for boost field treatment planning.

Main Methods:

  • Prospective study of 20 glioblastoma patients.
  • Comparison of interval CT scans with baseline studies after 4000-4500 cGy whole brain radiation.
  • Analysis of tumor volume changes and enhancing rim alterations.

Main Results:

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  • Tumor volume increased in 60% of patients (mean 126%) and decreased in 35% (mean 37%).
  • Volume changes did not predict prognosis.
  • Increased tumor volume necessitated potential boost field size adjustments, risking geographic miss.

Conclusions:

  • Significant glioblastoma volume changes occur after whole brain radiation therapy.
  • Early volume changes are not prognostic indicators.
  • Repeat CT or MRI is essential for optimal boost field planning after initial radiation therapy.