8 United States level 1 trauma centers enrolled patients for derivation and validation of a decision instrument to aid in the decision to perform a chest<unk>  in patients with blunt trauma.
The<unk>  has two sub-rules, one for detection of major injuries, and one for detection of all injuries (major and minor injuries) in hemodynamically stable, non-intubated patients<unk>  if any one of the following:
Abnormal CXR
Distracting injury
Tenderness of:
Chest wall
Sternum
Thoracic spine
Scapula
Chest wall
Sternum
Thoracic spine
Scapula
Sensitivity
99% for major injuries
90% for minor injuries<unk>  if any one of the following:
Abnormal CXR
Distracting injury
Tenderness of:
Chest wall
Sternum
Thoracic spine
Scapula
Rapid deceleration mechanism
Chest wall
Sternum
Thoracic spine
Scapula
Sensitivity
99% for major injuries
95% for minor injuries
NEXUS Chest CT Rule
Ultrasound: Lungs
Chest x-ray interpretation
MR CLEAN
Vital signs 
X-ray interpretation 
Aortic ultrasound
Bubble study