Table 2 Search strategy in PubMed for image quality

1

“diagnostic” AND (“radiography” OR x ray* OR radiotherapy*)

2

mobile AND (“radiography” OR x ray* OR radiotherapy*)

3

transportable AND (“radiography” OR x ray* OR radiotherapy*)

4

portable AND (“radiography” OR x ray* OR radiotherapy*)

5

“Radiography” [Mesh] OR (#1) OR “x-rays” [Mesh]

6

Portable OR transportable OR mobile

7

#6 AND “Radiography” [Mesh] OR #1 OR “X-rays” [Mesh]

8

#1 OR #3 OR #4 AND #7

9

“diagnostic quality”

10

#quality”

11

“image quality”

12

#10 AND #8

13

“mammography” OR “ultrasound” OR “computered tomography” OR “Magnetic resonance” OR “Positron Emissions Tomography”

14

#12 NOT #13

15

#14 filters from publication date 2009/01/01

16

#15 filters English; Danish; Norwegian; Swedish