Table 1.
List of parameters and variables.
| Label | Definition (typical value) |
|---|---|
| Constraints | |
| Tmax | maximum allowable temperature (5.25 °C) |
| Tz | desired peak temperature in a treatment zone (5 °C) |
| tp | pulse length (period = tp/dc) (50 ms) |
| M | number of treatment zones (4-6) |
| m | number of focal spots per treatment zone (8) |
| tq | time of mechanical motion (30 s); q = tq/tp |
| N | total number of pulses per focal spot (100) |
|
| |
| Variables & Symbols | |
|
| |
| T | temperature |
| dc | device duty cycle |
| DCz | local ‘treatment zone’ duty cycle |
| DCN | net duty cycle |
| nz | pulses per focal spot in a single pass |
| n | pulse number, from 0 to N |
| theat = mnztp/dc | time spent treating (heating) a single treatment zone |
| tM = M (mnztp/dc + tq) | time required to treat M treatment zones |
| tcool = tM – theat | time between treatments of a single treatment zone |
| Δ | increase in Tmax over Tz: |