Table 4.

Parameters and corresponding thermal dosimetry described for endoluminal ultrasound hyperthermia simulations of four patient-specific patient anatomies and three applicator geometries. Values listed in the table are for nominal attenuation $\left(11.09 Np{m}^{-1}MH{z}^{-1}\right)$ and nominal perfusion rate $\left(2.2kg{m}^{-3}{s}^{-1}\right)$, values in parentheses are for lower and higher perfusion rates $\left(0.5-5 kg{m}^{-3}{s}^{-1}\right)$, respectively, while values in highlighted rows are for low attenuation $\left(4.37 Np{m}^{-1}MH{z}^{-1}\right)$. The frequency of operation in all the simulations was $3.4 MHz$. The input power was modulated to achieve the maximum temperature of $45.0°\text{C}$ in all cases.

I₀ : Input surface intensity; Pr: Proximal transducer; Di: Distal transducer; V: Heated volume; $P{D}_{min}$: Minimum penetration depth of therapeutic zone from luminal wall inside the pancreas; $P{D}_{max}$: Maximum penetration depth of therapeutic zone; LH: Lateral extent of heating; PTV: Percentage of heated tumor volume

^**Low attenuation

^*Distal element inactive