Table 3.

Summary of the key challenges that cause barriers in clinical adoption and use of DIR

Answer Choices	Responses
Lack of time or staff resource	63%	32
Determining quantitative methods of ensuring deformation is OK	51%	26
Lack of deformable physical phantoms	51%	26
Determining when a registration is satisfactory	45%	23
Lack of guidance document	41%	21
Determining what to do when registration is not satisfactory	39%	20
Determining qualitative methods of ensuring deformation is OK	39%	20
Lack of knowledge locally	33%	17
Software DIR results not acceptable	29%	15
Lack of software, or funds for software	26%	13
Lack of tariff for using DIR in the clinic	24%	12
Lack of local interest from clinicians	18%	9
Software user friendliness	4%	2
Use cases not always clear	2%	1
Lack of training and/or workshops	2%	1
None	2%	1

DIR, deformable image registration.

The percentages are relative to the 51 centres who responded to the survey.