Microwave Treatment for Actinic Keratosis

"Localized microwave energy applied to the distinct AK lesion. Each subject will receive treatment for a maximum of 2 visits (4-week interval between treatment).~For AK lesions assessed as Thin AK (Olsen Grades 1 and 2): Set at 3W and apply locally for up to a 3 second burst and adjust the dose and duration. Repeat on the same AK lesion as is tolerable for the subject (3 repetitions). There will be approximately 20 seconds between each repeat dose.~For AK lesions assessed as Thick AK (Olsen Grade 3): Set at 4W and apply locally for up to a 3 second burst and adjust the dose and duration. Repeat on the same AK lesion as is tolerable for the subject (3 repetitions).~As the AK lesions may be larger than 3mm in diameter, the dose administered to one AK lesion may require overlapping applications with the applicator tip. Ensure there is approximately 20 seconds between each repeat dose administered"