Comparison of STAND and HAND specifications and functionality
| STAND | HAND* | |
|---|---|---|
| Cost (US$) | 60 000–100 000 | 7000 |
| Weight (kg) | 10–15 | 0.390 |
| Size | Large laptop | Large smart-phone |
| Display resolution (pixels) | 800×600 | 320×240 |
| Image sector | 90° | 75° |
| Colour Doppler | Yes (adjustable scale) | Yes (fixed scale) |
| Spectral Doppler | Yes | No |
| Transducers | Multiple | Single |
| Frequency | Multiple | Single |
| Battery charge time (min) | 120 | 60 |
| Battery life (scan time) (min) | 45 | 90 |
| Overheat tendency | Rare | Common |
| Patient information | Multiple data fields | Voice file only |
| Measurements | Multiple (linear, volume, Doppler) | Linear only—cumbersome |
| File format | Any, DICOM compatible | .jpg, .mpg, .wav, not DICOM compatible |
| File size (MB) | 25–100/study | 1–2/study |
| File transfer | Wired, wireless, manual, network | Wired, manual |
| Offline viewing | Compatible with any DICOM viewer | Propriety software |
*GE VScan—only handheld echocardiography machine used in published RHD studies.
DICOM, digital imaging and communications medicine; RHD, rheumatic heart disease; STAND, standard portable echocardiography machine; HAND, handheld devices.