TABLE 2

2 × 2 Tables of the Imaging Modalities

ModalityPositiveNegativeTotal
V/Q SPECT
 PE28129
 No PE64248
 Total344377
V/Q SPECT plus low-dose CT
 PE30131
 No PE05050
 Total305181
Perfusion SPECT plus low-dose CT
 PE26228
 No PE202141
 Total462369
Pulmonary MDCT angiography
 PE211031
 No PE05050
 Total216081