Description
Normalize one supplied trial observation timestamp relative to an explicit research anchor.
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.
Normalize one supplied trial observation timestamp relative to an explicit research anchor.
When to use this tool
Use Trial Observation Time Offset when you need this research measurement, assessment-base, source, or event-time calculation.
How to use the tool and how it works
- Enter observationTime, anchorTime, suppliedClockOffset. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read relativeTime. Use the output convention below.
Return relativeTime=observationTime-suppliedClockOffset-anchorTime.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| observationTime | Observation Time | Required. Finite number. |
| anchorTime | Anchor Time | Required. Finite number. |
| suppliedClockOffset | Supplied Clock Offset | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| relativeTime | Relative Time | Required. Finite number. |
{
"input": {
"observationTime": 120,
"anchorTime": 100,
"suppliedClockOffset": 5
},
"output": {
"relativeTime": 15
}
}Limitations and assumptions
- All times and offset need one unit and origin, with offset defined as recorded-clock minus the anchor clock. Negative values are retained; actual clocks, event chronology, study endpoints, and clinical interpretation are not verified.
- 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 Time Anchor Precision Flag
Propagate an already resolved research anchor-date interval without clinical time-origin rules.
- Observation Visible Time Weight
Return one caller-classified research visibility contribution, not a patient-observation score.