Selection criteria used to determine concept scoring
| Selection criteria | Design input | Weight (%) | Description |
| Weight capacity | <1200 lbs | 25 | Effect of modification on weight capacity. |
| Radiation attenuation | <1% increase | 15 | Effect of modification on reducing radiation penetration. |
| Durability | <6 hours continuous, repeat use | 15 | Ability of modification to support large weight loads for continuous periods of time repeatedly. |
| Staff manoeuvrability | – | 15 | Effect of modification on physicians’, techs’ and nurses’ ability to move around the patient and access certain parts of the body. |
| Fluoroscope manoeuvrability | – | 10 | Effect of modification on fluoroscope’s ability to move as needed. |
| Ease of use | – | 5 | Time, effort and number of potential complications associated with modification during procedure. |
| Ease of set up | <10 min <5 parts | 5 | Time, effort and number of potential complications associated with modification prior to procedure. |
| Ease of manufacturing | – | 2 | Time and resources associated with manufacturing modification. |
| Lateral rotation of patient | – | 5 | Effect of modification on ability to turn patients laterally for better access to certain areas of the body. |
| Patient comfort | ASTM Standards | 3 | Degree of comfort offered to patients by modification. |