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Table 3 Sensitivity, specificity and accuracy of CTA and MRA in detecting significant stenoses (≥50 %) using DSA as the reference standard

From: The diagnostic value of non-contrast enhanced quiescent interval single shot (QISS) magnetic resonance angiography at 3T for lower extremity peripheral arterial disease, in comparison to CT angiography

 

Reader 1

Reader 2

CTA

MRA

P

CTA

MRA

P

All segments

 Sensitivity

90.11 % (82/91)

94.25 % (82/87)

0.305

89.13 % (82/92)

93.26 % (83/89)

0.328

 Specificity

96.55 % (84/87)

96.70 % (88/91)

0.955

96.51 % (83/86)

97.75 % (87/89)

0.622

 Accuracy

93.26 % (166/178)

95.51 % (170/178)

0.357

92.70 % (165/178)

95.51 % (170/178)

0.261

Heavily calcified segments

 Sensitivity

74.19 % (23/31)

95.83 % (23/24)

0.031

76.67 % (23/30)

95.83 % (23/24)

0.049

 Specificity

90.00 % (9/10)

94.12 % (16/17)

0.693

90.91 % (10/11)

94.12 % (16/17)

0.747

 Accuracy

78.05 % (32/41)

95.12 % (39/41)

0.023

80.49 % (33/41)

95.12 % (39/41)

0.043

  1. CTA computed tomography angiography, MRA magnetic resonance angiography