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Table 3 Percentage of students in each year associating ionising radiation with various modalities. The figures in parentheses represent the student numbers. Students were most knowledgeable about plain film radiography. Imaging studies encountered less frequently by students such as mammography and barium studies were less well understood.

From: An assessment of medical students’ awareness of radiation exposures associated with diagnostic imaging investigations

Imaging study

Year 0

Year 0 (postgrad)

Year 1

Year 2

Year 3

Year 4

Year 5

Chest radiograph

91 (101)

100 (100)

91.1 (111)

98.9 (86)

99.1 (112)

99.1 (109)

99 (99)

CT

41.4 (46)

33.3 (12)

50 (56)

56.3 (49)

62.8 (71)

82.7 (91)

87 (87)

MRI

29.7 (33)

11.1 (4)

24.1 (27)

16.1 (14)

10.6 (12)

16.4 (18)

2 (2)

Ultrasound

9 (10)

5.6 (2)

4.5 (5)

3.4 (3)

5.3 (6)

3.6 (4)

1 (1)

Mammography

36.9 (41)

55.6 (20)

44.6 (50)

54 (48)

77 (87)

74.5 (82)

82 (82)

Barium Studies

36 (40)

38.9 (14)

46.4 (52)

71.3 (63)

71.7 (81)

82.7 (91)

88 (88)

Angiography

25.2 (28)

22.2 (8)

44.6 (50)

62.1 (54)

69 (78)

80.9 (89)

81 (81)