Description
Matched research measurement sums only; target selection, missing lesions and formal response rules are not inferred.
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.
Matched research measurement sums only; target selection, missing lesions and formal response rules are not inferred.
When to use this tool
Use Oncology Study Measurement Sum Delta when you need this research measurement, assessment-base, source, or event-time calculation.
How to use the tool and how it works
- Enter baseline, followup. Keep parallel arrays aligned. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read baselineSum, followupSum, sumChange, relativeChange. Use the output convention below.
Require aligned nonempty nonnegative baseline and followup measurement arrays and positive baseline sum. Return baselineSum, followupSum, sumChange=followupSum-baselineSum, and relativeChange=followupSum/baselineSum-1.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| baseline | Baseline | Required. Array of finite number; maximum items 256. |
| followup | Followup | Required. Array of finite number; maximum items 256. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| baselineSum | Baseline Sum | Required. Finite number. |
| followupSum | Followup Sum | Required. Finite number. |
| sumChange | Sum Change | Required. Finite number. |
| relativeChange | Relative Change | Required. Finite number. |
{
"input": {
"baseline": [
20,
30
],
"followup": [
15,
25
]
},
"output": {
"baselineSum": 50,
"followupSum": 40,
"sumChange": -10,
"relativeChange": -0.19999999999999996
}
}Limitations and assumptions
- Measurements need one unit and matching lesion definitions. RelativeChange is a fraction, not a percent numeral; the sum does not establish lesion correspondence, formal response status, progression, or treatment suitability.
- 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
- Oncology Study Missing Assessment Denominator
Explicit research assessment denominator policy; no clinical positive outcome or statistical missingness mechanism is inferred.
- Lesion Measurement Resolution Gap
For nonnegative measured and reference and positive quantum return difference=measured-reference and quantumSteps=difference/quantum.