Back to results
US 2026/0306836 A1Published application
Reducing Electrosensation While Treating a Subject Using Alternating Electric Fields by Controlling Ramp-Up Characteristics
AssigneeNovocure GmbH
InventorsYoram WASSERMAN, Michael SHTOTLAND
Life of this patent
Estimating the term…
Abstract
When transducer arrays (i.e., arrays of electrode elements) are used to apply alternating electric fields to a subject's body, the subject may experience electrosensation. This electrosensation can be ameliorated by changing the way the voltage ramps up from zero to its peak when the AC voltage is first applied to any given transducer array, and also when the alternating electric field switches direction.
Claims6
An apparatus for applying electrical signals to first, second, third, and fourth sets of at least one electrode element, the apparatus comprising:
- an AC signal generator having a first output, a second output, and at least one control input;
- and
- a controller configured to apply a sequence of control signals to the at least one control input of the AC signal generator,
- wherein the sequence of control signals commands the AC signal generator to
- (a) apply a first AC output signal to the first output during a first interval of time, wherein the first AC output signal has an amplitude that increases at a first rate during a first subsection of the first interval of time and increases at a second rate that is slower than the first rate during a second subsection of the first interval of time, wherein the second subsection of the first interval of time comes immediately after the first subsection of the first interval of time, wherein the first AC output signal has an amplitude that remains constant during a third subsection of the first interval of time, and wherein the third subsection of the first interval of time comes after the second subsection of the first interval of time.
2 more elements
Dependencies are inferred from the claim text.