Analysis Types

When creating a case, you specify an analysis_type to control what analyses run. This determines the processing pipeline, required data, and output included in the final report.

Available Types

Type	Description	Requires Occupants?	Requires Vehicle Photos?
`accident_only`	Crash analysis with Delta-V and PDOF	No	Yes
`accident_injury`	Crash analysis + biomechanics	Yes	Yes
`delta_v_only`	Delta-V calculation only	No	Yes
`biomechanics_only`	Biomechanics analysis only	Yes	No

`accident_only` (Default)

Runs crash reconstruction analysis on vehicle damage photos. Calculates Delta-V, PDOF, and crash pulse timing. Does not include any biomechanics or injury analysis.

Use when: You only need the crash parameters (Delta-V, PDOF) without injury analysis.

curl -X POST "https://api.silentwitness.ai/api/cases" \
  -H "X-API-Key: $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "plaintiff_name": "John Smith",
    "defendant_name": "Bob Johnson",
    "attorney_name": "Jane Attorney",
    "analysis_type": "accident_only",

    "vehicles": [
      {
        "role": "plaintiff",
        "vehicle_maker": "Toyota",
        "vehicle_model": "Camry",
        "vehicle_year": "2020",
        "vehicle_type": "sedan"
      },
      {
        "role": "defendant",
        "vehicle_maker": "Ford",
        "vehicle_model": "F-150",
        "vehicle_year": "2019",
        "vehicle_type": "truck"
      }
    ]
  }'

`accident_injury`

Runs the full pipeline: crash reconstruction followed by biomechanics analysis for each occupant. The technical report includes both crash parameters and injury mechanism analysis.

Use when: You need a complete analysis including how crash forces affected occupants.

Requires: At least one occupant with age, gender, position, and alleged_injuries.

curl -X POST "https://api.silentwitness.ai/api/cases" \
  -H "X-API-Key: $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "plaintiff_name": "John Smith",
    "defendant_name": "Bob Johnson",
    "attorney_name": "Jane Attorney",
    "analysis_type": "accident_injury",

    "vehicles": [
      {
        "role": "plaintiff",
        "vehicle_maker": "Toyota",
        "vehicle_model": "Camry",
        "vehicle_year": "2020",
        "vehicle_type": "sedan"
      }
    ],

    "occupants": [
      {
        "name": "John Smith",
        "age": 45,
        "gender": "male",
        "height_inches": 70,
        "weight_lbs": 180,
        "position": "driver",
        "seatbelt_worn": true,
        "alleged_injuries": ["cervical_spine", "lumbar_spine"],
        "injury_severity": "moderate"
      }
    ]
  }'

`delta_v_only`

Runs only the Delta-V calculation from vehicle damage photos. Produces a minimal output focused on the speed change at impact. Skips PDOF analysis and crash pulse timing.

Use when: You only need the Delta-V number for a quick assessment or triage.

curl -X POST "https://api.silentwitness.ai/api/cases" \
  -H "X-API-Key: $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "plaintiff_name": "John Smith",
    "defendant_name": "Bob Johnson",
    "attorney_name": "Jane Attorney",
    "analysis_type": "delta_v_only",

    "vehicles": [
      {
        "role": "plaintiff",
        "vehicle_maker": "Toyota",
        "vehicle_model": "Camry",
        "vehicle_year": "2020",
        "vehicle_type": "sedan"
      }
    ]
  }'

`biomechanics_only`

Runs only biomechanics analysis for the provided occupants. Does not run crash reconstruction — you must provide crash parameters separately or from a previous analysis.

Use when: You already have crash parameters and only need the injury mechanism analysis.

Requires: At least one occupant with age, gender, position, and alleged_injuries.

curl -X POST "https://api.silentwitness.ai/api/cases" \
  -H "X-API-Key: $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "plaintiff_name": "John Smith",
    "defendant_name": "Bob Johnson",
    "attorney_name": "Jane Attorney",
    "analysis_type": "biomechanics_only",

    "occupants": [
      {
        "name": "John Smith",
        "age": 45,
        "gender": "male",
        "height_inches": 70,
        "weight_lbs": 180,
        "position": "driver",
        "seatbelt_worn": true,
        "alleged_injuries": ["cervical_spine", "lumbar_spine"],
        "injury_severity": "moderate"
      }
    ]
  }'

Choosing the Right Type

Do you need injury/biomechanics analysis?
├── No
│   ├── Need full crash parameters? → accident_only
│   └── Just need Delta-V number?   → delta_v_only
└── Yes
    ├── Have vehicle damage photos?  → accident_injury (full pipeline)
    └── Already have crash params?   → biomechanics_only

Next Steps

Create a Case - Full API reference
End-to-End Example - Complete workflow walkthrough
Generating a Report - Report generation guide

Available Types​

accident_only (Default)​

accident_injury​

delta_v_only​

biomechanics_only​

Choosing the Right Type​

Next Steps​