Term
2 or more large mismatched segmental perfusion defects 

Definition
High probability
>=80% chance of PE 


Term
High probability scan
What % have PE? 

Definition


Term
One large plus two moderate mismatched segmental perfusion defect 

Definition
High probability
>= 80% chance of PE 


Term
Four moderate mismatched segmental perfusion defects 

Definition
High probability
>=80% chance of PE 


Term
One large plus one moderate mismatched segmental perfusion defects 

Definition
Intermediate probability
20%79% chance of PE 


Term
A single matched segmental perfusion defect of any size, with clear chest xray 

Definition
Intermediate probability
20%79% chance of PE 


Term
Any perfusion defect with a substantially larger chest xray abnormality 

Definition


Term
Solitary triplematched segmental defect in the mid or upper lung zone 

Definition


Term
Stripe of perfused lung tissue between a perfusion defect and the adjacent pleural surface 

Definition


Term
Pleural effusion, no other defect 

Definition


Term
One to three small segmental perfusion defects (<25% of segment) 

Definition


Term
Solitary triplematched defect in the lower lung zone 

Definition


Term
Specificity of a normal or very low probability VQ scan? 

Definition

