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Wald-Wolfowitz Runs Test II01:17

Wald-Wolfowitz Runs Test II

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Extended Versions of Green’s Theorem01:27

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Related Experiment Video

Updated: Jun 10, 2026

Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope
11:14

Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope

Published on: May 28, 2016

Validation of the Eclipse AAA algorithm at extended SSD.

Amjad Hussain1, Eduardo Villarreal-Barajas, Derek Brown

  • 1Department of Medical Physics, Tom Baker Cancer Centre, University of Calgary, Calgary, Alberta, Canada. Amjad.Hussain@albertahealthservices.ca

Journal of Applied Clinical Medical Physics
|August 19, 2010
PubMed
Summary
This summary is machine-generated.

The Eclipse AAA algorithm accurately predicts dose distributions for total body irradiation (TBI) at extended source-to-surface distances (SSD). This validates its use in TBI planning, even when commissioned at standard SSD.

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Last Updated: Jun 10, 2026

Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope
11:14

Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope

Published on: May 28, 2016

Area of Science:

  • Medical Physics
  • Radiation Oncology

Background:

  • Accurate dose calculations are crucial for total body irradiation (TBI) planning, especially at extended source-to-surface distances (SSD).
  • The Eclipse AAA algorithm is a potential tool for improving dose distribution prediction in TBI.

Purpose of the Study:

  • To evaluate the accuracy of the Eclipse AAA algorithm for predicting dose distributions in water at extended SSD.
  • To assess the algorithm's performance with machine-specific beam data and compare it with standard commissioning data.

Main Methods:

  • Eclipse AAA algorithm was commissioned with machine-specific 6 MV photon beam data at standard SSD (100 cm).
  • Dose distributions were calculated at an extended SSD (179.5 cm) in a water tank for various field sizes, with and without an acrylic spoiler.
  • Measured dose profiles and absolute depth dose curves were compared with AAA calculations using confidence limits (within 2% and 2 mm).

Main Results:

  • The Eclipse AAA algorithm demonstrated accurate dose prediction capabilities at extended SSD.
  • Calculations using custom-commissioned data showed no significant difference compared to using Varian Golden beam data.
  • Confidence limits for comparisons between measured and calculated data were within acceptable clinical tolerances.

Conclusions:

  • The Eclipse AAA algorithm, commissioned at standard SSD, can reliably predict dose distributions in water at extended SSD for 6 MV open beams.
  • This finding supports the implementation of advanced techniques like multi-leaf collimator compensation for TBI.
  • The study validates the use of Eclipse AAA for dosimetric planning in TBI requiring extended SSD calculations.