Description
Descriptive research diameter change and instrument-resolution units, without response criteria, staging or a clinical decision.
Research lesion records distinguish measured dimensions, geometric size models, censoring conventions, assessment denominators, and follow-up timing. An axis product, percent change, or coverage measure describes only its stated inputs and model. Such arithmetic does not automatically implement a clinical response criterion or validate a study.
Descriptive research diameter change and instrument-resolution units, without response criteria, staging or a clinical decision.
When to use this tool
Use Tumor Research Diameter Percent Change when you need this research measurement, assessment-base, source, or event-time calculation.
How to use the tool and how it works
- Enter baselineDiameter, followupDiameter, measurementResolution. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read absoluteChange, percentChange, resolutionUnits. Use the output convention below.
For positive baselineDiameter and measurementResolution and nonnegative followupDiameter return absoluteChange=followup-baseline, percentChange=100*change/baseline, and resolutionUnits=change/resolution.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| baselineDiameter | Baseline Diameter | Required. Finite number; strictly above 0. |
| followupDiameter | Followup Diameter | Required. Finite number; minimum 0. |
| measurementResolution | Measurement Resolution | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| absoluteChange | Absolute Change | Required. Finite number. |
| percentChange | Percentage numeral, such as 20 for a twenty-percent increase. | Required. Finite number. |
| resolutionUnits | Resolution Units | Required. Finite number. |
{
"input": {
"baselineDiameter": 20,
"followupDiameter": 15,
"measurementResolution": 0.5
},
"output": {
"absoluteChange": -5,
"percentChange": -25,
"resolutionUnits": -10
}
}Limitations and assumptions
- Use one length unit. PercentChange is a percentage numeral, while resolutionUnits is a signed increment count; no tolerance, measurement uncertainty, tumor-response classification, or treatment recommendation is inferred.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use the intended study protocol and a complete measurement or analysis model for a broader conclusion. Verify lesion definitions, censoring, measurement correspondence, time anchors, and missing-assessment policy.
References
Similar or alternative tools
- Research Lesion Dimension Change
Compare supplied research dimensions without clinical response criteria or diagnosis.
- Oncology Study Measurement Sum Delta
Matched research measurement sums only; target selection, missing lesions and formal response rules are not inferred.