GPR Variation in Breast Cases: Gamma Passing Rates for Patient-Specific QA

Gamma passing rate (GPR) data from a study comparing two patient-specific quality assurance methods for radiation therapy. The dataset likely contains GPR values for prostate, nasopharynx, and breast cases under different test conditions. It was authored by Shinhaeng Cho and last updated on May 14, 2026.

Use Cases

• Compare the sensitivity of EPID-based and Delta4-based QA methods to treatment isocenter displacements.
• Analyze the correlation between gamma passing rates from different QA systems across multiple cancer sites.
• Evaluate the clinical robustness of EPID-based field-by-field QA based on tolerance and action limits.
• Refine evaluation criteria for patient-specific QA by benchmarking against AAPM TG-218 thresholds.

Strengths

• Includes tolerance (99.5%) and action (99.4%) limits derived from the study, which exceed conventional thresholds.
• Compares results across three distinct cancer case types: prostate, nasopharynx, and breast.
• Data is associated with a peer-reviewed study employing two-way repeated measures ANOVA analysis.

Limitations

• Row count is unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• The dataset is very small (33.7 KB), indicating limited scope.

Provenance

Source

figshare

Collection Method

Likely collected from experimental QA procedures on a Halcyon linear accelerator.

Freshness

Last updated 2026-05-14 17:41:59; freshness should be verified.