Table 4 Number of patients with diagnostic procedures in study in years 1972, 1982, 1992 and 2002

From: Diagnostic errors in the new millennium: a follow-up autopsy study

Procedure

1972

1982

1992

2002

Non-contrast radiological procedures

92

87

81

80

Contrast radiological procedures

13

2

11

7

Endoscopies

14

18

32

36

Biopsies, fine-needle aspirations and surgical explorations

13

10

15

34

Scintigraphy

12

2

3

5

Ultrasound

0

15

49

42

Echocardiography

0

2

24

26

Computed tomography

0

11

17

45

Magnetic resonance imaging

0

0

3

6

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