Table 1.
The various planar and single‐photon emission computed tomography (SPECT) performance characteristics studied and the corresponding reference that describes the measurement procedure, where FWHM is the full width at half maximum, NEMA is the National Electrical Manufacturers Association, and AAPM is the American Association of Physicists in Medicine. (a) Indicates performance characteristics tested without low‐energy, high‐resolution collimators, and (b) indicates performance characteristics not tested for intracamera variability
| Performance characteristic | Units | Reference document |
|---|---|---|
| Planar | ||
| Intrinsic energy resolution(a) | FWHM‐% | NEMA NU 1‐1994 |
| Intrinsic integral flood uniformity(a) | % | NEMA NU 1‐1994 |
| Intrinsic differential flood uniformity(a) | % | NEMA NU 1‐1994 |
| Planar sensitivity | cps/μCi | NEMA NU 1‐1994 |
| Intrinsic spatial resolution(a,b) | FWHM‐mm | Hander method( 6 , 7 ) |
| Extrinsic spatial resolution(b) | FWHM‐mm | Hander method( 6 , 7 ) |
| Count rate at 20% count loss | kcps | AAPM report 6 |
| SPECT | ||
| Spatial resolution(b) | FWHM‐mm | AAPM report 52 |
| Integral uniformity | % | AAPM report 52 |