Yes, but depending on your application, the required amount may be significantly reduced. A small amount of ultrasound gel needs to be applied between the transducer and the aiSon Focus to ensure coupling between the transducer and the pad. You also need a coupling medium between the patient’s skin and the aiSon Focus. However, while you may use ultrasound gel in small amounts on the skin, you can also use disinfectant or other liquids instead, while still getting great image quality.