Table 6 The location of pulmonary emboli in two groups (A, double low group; B, contrast group).

From: Use of pulmonary CT angiography with low tube voltage and low-iodine-concentration contrast agent to diagnose pulmonary embolism

Pulmonary arterial branch level

1

2

3

4

5

Group A

9

34

50

33

6

Group B

9

36

59

44

7

P value

1.000

0.857

0.332

0.185

0.985

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