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Related Experiment Video

Updated: May 31, 2026

A Mouse Model of Incompletely Resected Soft Tissue Sarcoma for Testing (Neo)adjuvant Therapies
07:15

A Mouse Model of Incompletely Resected Soft Tissue Sarcoma for Testing (Neo)adjuvant Therapies

Published on: July 28, 2020

Inter- and intra-observer variation in soft-tissue sarcoma target definition.

D Roberge1, T Skamene, R E Turcotte

  • 1Division of Radiation Oncology, McGill University Health Centre, 1650 Cedar Avenue, Montreal, Canada. drroberge@yahoo.com

Cancer Radiotherapie : Journal De La Societe Francaise De Radiotherapie Oncologique
|July 12, 2011
PubMed
Summary
This summary is machine-generated.

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Inter-observer variability exists in defining gross tumor volume for adult soft tissue sarcomas, but the center of mass remains consistent. This finding is crucial for radiation oncology treatment planning and sarcoma gross tumor volume definition.

Area of Science:

  • Oncology
  • Radiology
  • Medical Imaging

Background:

  • Accurate gross tumor volume (GTV) definition is critical for effective radiation therapy planning in soft tissue sarcomas.
  • Inter- and intra-observer variability in GTV delineation can impact treatment consistency and outcomes.

Purpose of the Study:

  • To assess the variability among different specialists in defining the GTV for adult limb and trunk soft tissue sarcomas.
  • To quantify both inter-observer and intra-observer variability in GTV contouring.

Main Methods:

  • Fifteen adult patients with soft tissue sarcomas treated with preoperative radiation were included.
  • Five physicians (radiation oncologists, orthopedic surgeons, musculoskeletal radiologist) contoured GTVs twice on MRI scans.
  • Volume and center of mass coordinates were extracted for Boolean analysis of overlap.

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Construction of a Preclinical Multimodality Phantom Using Tissue-mimicking Materials for Quality Assurance in Tumor Size Measurement
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Published on: July 29, 2013

Establishment of a Primary Culture of Patient-derived Soft Tissue Sarcoma
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Establishment of a Primary Culture of Patient-derived Soft Tissue Sarcoma

Published on: April 11, 2018

Related Experiment Videos

Last Updated: May 31, 2026

A Mouse Model of Incompletely Resected Soft Tissue Sarcoma for Testing (Neo)adjuvant Therapies
07:15

A Mouse Model of Incompletely Resected Soft Tissue Sarcoma for Testing (Neo)adjuvant Therapies

Published on: July 28, 2020

Construction of a Preclinical Multimodality Phantom Using Tissue-mimicking Materials for Quality Assurance in Tumor Size Measurement
06:33

Construction of a Preclinical Multimodality Phantom Using Tissue-mimicking Materials for Quality Assurance in Tumor Size Measurement

Published on: July 29, 2013

Establishment of a Primary Culture of Patient-derived Soft Tissue Sarcoma
07:55

Establishment of a Primary Culture of Patient-derived Soft Tissue Sarcoma

Published on: April 11, 2018

Main Results:

  • Median inter-observer GTV standard deviation was 6.1% of the average volume, with a median overlap of 79%.
  • Center of mass 3D distance standard deviation was low (median 0.1 mm), indicating positional consistency.
  • Intra-observer variability showed a median GTV standard deviation of 4.8% and a median overlap of 93%.

Conclusions:

  • Significant inter-observer differences exist in GTV definition for adult soft tissue sarcomas, yet the center of mass is consistently identified.
  • Variations in GTV volume did not correlate with tumor size.
  • Radiation oncologists should collaborate to ensure contouring accuracy and consider GTV variability in clinical target volume protocols.