Keywords:
Interventional non-vascular, Neuroradiology brain, MR, Ablation procedures, Physics
Authors:
L. Panebianco1, M. V. M. Micelli1, F. Bruno1, A. Catalucci1, M. Varrassi1, F. Arrigoni1, P. Sucapane1, A. Ricci2, C. Masciocchi1; 1L'Aquila/IT, 2Rome/IT
DOI:
10.26044/ecr2019/C-3020
Aims and objectives
Thermoablation of ventral intermediate thalamic nucleus by magnetic resonance-guided focused ultrasounds is a non-invasive interventional procedure in the treatment of tremors,
particularly essential tremor and Parkinson-related.
Ultrasound administration is performed by a variable number of controlled deliveries called "sonications".
When setting sonications up,
to obtain an oprtimal result many factors are to be taken in account; they include fixed,
non-modifiable indexes,
and modifiable physical parameters:
- energy delivered,
expressed in Joule;
- sonication power,
expressed in Watt
- sonication effective time,
in seconds;
- target temperature reached,
in Celsius degrees;
- skull score,
a proprietary index assessing skull density ratio,
ranging 0-1;
- skull area,
in cm2;
- active sonication elements,
the number of elements supplying the ultrasounds.
The ultrasound supply algorithm is programmed by manually setting the physical parameters,
matched to the patient-specific indexes.
The purpose of the study was finding correlations between sonication physical parameters and patient indexes, to obtain practical suggestions.