.. _auto_injury_get_cti_intercept:

*GET CTI INTERCEPTS BY OCCUPANT TYPE AND MEAS TYPE*
===================================================

Looks up the Combined Thoracic Index (CTI) intercept values from internal reference tables, keyed by occupant type (e.g., Hybrid III 50th male, CRABI infant) and measurement type (deflection or acceleration). Use this worker to retrieve the injury-criterion denominator constants required before computing CTI scores in an occupant safety pipeline.

When to use
-----------

Classification: **process**.

Tagged: ``acceleration``, ``chest``, ``combined_thoracic_index``, ``cti``, ``deflection``, ``injury_criteria``, ``intercept``, ``lookup``.

Inputs
------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20 20 20

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Occupant Type
     - occupant_type
     - scalar
     - crabi_12_month_old_infant
     - 
     - Dummy/ATD occupant category whose CTI intercept table is queried; choose from CRABI 12-month infant, Hybrid III 3YO, 6YO, small female (5th-percentile), or mid-sized male (50th-percentile); defaults to 'crabi_12_month_old_infant'.
   * - Measurement Type
     - measurement_type
     - scalar
     - deflection
     - 
     - Physical channel used for the CTI denominator lookup — 'deflection' (chest compression, typically mm or in) or 'acceleration' (chest acceleration, typically g); defaults to 'deflection'.
   * - Scale
     - scale
     - text
     - 1
     - 
     - Multiplicative scale factor applied to the retrieved intercept value before output; leave at default 1.0 to return the raw table value.

Outputs
-------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20

   * - Label
     - ID
     - Type
     - Description
   * - injury_get_cti_intercept_output_1
     - injury_get_cti_intercept_output_1
     - text
     - The CTI intercept constant (D_int or A_int) for the selected occupant type and measurement type, scaled by the 'scale' input; used as the denominator term in downstream CTI calculations.

Disciplines
-----------

- engineering.crash.occupant_safety

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   Auto-generated from <code>transformation</code> schema. Worker id: <code>injury_get_cti_intercept</code>. Schema hash: <code>81b74365ce5e</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
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