Description
Compare supplied research dimensions without clinical response criteria or diagnosis.
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.
Compare supplied research dimensions without clinical response criteria or diagnosis.
When to use this tool
Use Research Lesion Dimension Change when you need this research measurement, assessment-base, source, or event-time calculation.
How to use the tool and how it works
- Enter baselineDimension, followupDimension, suppliedScale. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read absoluteChange, relativeChange, defined. Inspect defined before interpreting the associated values.
For nonnegative baselineDimension and followupDimension and positive suppliedScale return absoluteChange=(followup-baseline)*scale. Return relativeChange=(followup-baseline)/baseline when baseline is nonzero, otherwise zero with defined=false.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| baselineDimension | Baseline Dimension | Required. Finite number; minimum 0. |
| followupDimension | Followup Dimension | Required. Finite number; minimum 0. |
| suppliedScale | Supplied Scale | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| absoluteChange | Absolute Change | Required. Finite number. |
| relativeChange | Dimensionless change fraction; zero placeholder if defined=false. | Required. Finite number. |
| defined | Whether the stated denominator or quantity is defined; inspect before using a placeholder. | Required. Boolean. |
{
"input": {
"baselineDimension": 10,
"followupDimension": 12,
"suppliedScale": 1
},
"output": {
"absoluteChange": 2,
"relativeChange": 0.2,
"defined": true
}
}Limitations and assumptions
- Scale affects the absolute change only and converts source length to output units. Relative zero on a zero baseline is a placeholder; no lesion-response category, measurement-quality judgment, or clinical recommendation is produced.
- 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
- Tumor Research Diameter Percent Change
Descriptive research diameter change and instrument-resolution units, without response criteria, staging or a clinical decision.
- Oncology Study Measurement Sum Delta
Matched research measurement sums only; target selection, missing lesions and formal response rules are not inferred.