Description
Express a supplied coordinate with left-positive and right-positive signs.
Anatomical measurements depend on coordinate frame, plane, axis sign, terminology source and scale. Reordering length/width/depth does not identify anatomical axes, and a landmark separation requires corresponding calibrated points. Source-qualified names preserve wording without verifying a structure or clinical interpretation.
Express a supplied coordinate with left-positive and right-positive signs.
When to use this tool
Use Sagittal Left Right Sign Crosswalk when you already have coordinate, positiveMeansLeft and need to express a supplied coordinate with left-positive and right-positive signs.
How to use the tool and how it works
- Enter coordinate, positiveMeansLeft. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read leftPositiveCoordinate, rightPositiveCoordinate. Use the output convention below.
Use positiveMeansLeft to retain or negate coordinate for each of the two opposite sign conventions.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| coordinate | Coordinate | Required. Finite number. |
| positiveMeansLeft | Positive Means Left | Required. Boolean. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| leftPositiveCoordinate | Left Positive Coordinate | Required. Finite number. |
| rightPositiveCoordinate | Right Positive Coordinate | Required. Finite number. |
{
"input": {
"coordinate": 5,
"positiveMeansLeft": true
},
"output": {
"leftPositiveCoordinate": 5,
"rightPositiveCoordinate": -5
}
}Limitations and assumptions
- This is a sign crosswalk only. No origin, anatomical frame, image orientation, patient side or position 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
Inspect the original specimen, image, coordinate definitions and terminology source. Use the complete anatomical or clinical assessment when local distances, labels or axis mappings cannot answer the question.
References
Similar or alternative tools
- Anatomical Plane Normal Axis
Map a supplied standard anatomical plane to its normal-axis name.
- Anatomical Lateral Medial Axis Label
Label a supplied medial/lateral positive-axis direction and side.