Dualsonic HIFU in Korea is a focused ultrasound lifting treatment offered under that device name by some clinics, and like other HIFU systems it heats small points beneath the skin to prompt gradual firming. It sits in the same energy class as Ultherapy and Shurink Universe: ultrasound, not radiofrequency or laser. Published specifications for Dualsonic, such as its maker, cartridge depths and any imaging, are not part of the device information summarized here, and specifics vary from one HIFU system to another. What can be described is how HIFU sessions generally run: numbing cream, roughly 20 to 60 minutes for a face depending on the plan, short-lived redness or swelling, and firming that builds over months.
Merz Aesthetics · Ultherapy PrimeGuide
What the device name tells you, and what it leaves open
A brand name on a clinic menu confirms the energy type at most. It does not say who made the machine, which depths its cartridges reach, or whether the operator sees the tissue on a screen. Those details shape the plan more than the name.
Treat Dualsonic like any less familiar device: ask the clinic to state the maker, the cartridge depths it will use on each zone, and whether the unit is cleared by Korea's Ministry of Food and Drug Safety (MFDS). A clinic that uses the device regularly should answer these quickly and in writing.
Guide
Yardsticks from established ultrasound devices
The useful move is to compare what the clinic tells you with how established systems are built. Ultherapy and its Prime version use transducers at 1.5, 3.0 and 4.5 mm, the deepest reaching the SMAS. Shurink Universe adds a 2.0 mm cartridge. Sofwave sends parallel cylindrical beams into the dermis at about 1.5 mm instead of to a focal point.
Design changes how a session runs, not always the outcome. In a 2025 blinded, split-body randomized trial in Dermatologic Surgery, Loyal and colleagues treated the upper inner arms of 14 women with a parallel-beam high-intensity ultrasound device on one side and microfocused ultrasound with visualization on the other. Both sides improved by day 90, pain scores did not differ significantly, and the visualized side took longer.
| Question for the clinic | Why it matters | Reference point |
|---|---|---|
| Which depths will each zone receive? | Depth decides whether the SMAS or only the skin is heated | Point-focus systems commonly list 1.5, 3.0 and 4.5 mm |
| Is there live imaging? | Imaging lets the operator check layers before each pass | Ultherapy shows an on-screen ultrasound view |
| Point focus or parallel beams? | Beam shape changes the treated layer and session time | Sofwave uses parallel beams near 1.5 mm |
| How are shots counted? | The count per zone sets the size of the plan | Clinics list shots or lines per area |
Guide
How a session usually runs
The day follows the same outline as most ultrasound lifts. Clinics price these sessions by shots or lines per area, and the price page on this site covers that separately.
- Assessment: the doctor checks laxity, skin thickness and the zones to treat.
- Numbing: anesthetic cream sits on the skin for a period before treatment.
- Passes: the handpiece is placed zone by zone, with deeper rows over the jaw and lower cheek.
- Soothing: the skin is cleaned and cooled, and aftercare is explained.
Guide
Recovery, side effects and who should wait
Most people return to ordinary plans the same day. Redness, mild swelling and tenderness along the jaw are common for a few days; bruising is less common. Temporary numbness or nerve irritation near the jaw can occur and usually settles over weeks.
Deeper passes feel like sharp heat even after numbing. The treatment is not suitable during pregnancy, over active acne or infection in the area, or over metal implants in the zone, and marked sagging may need surgery instead.
Guide
What the research covers, and what it does not
No assigned study tests Dualsonic itself. The evidence here concerns focused ultrasound in general. In a 2017 study in Plastic and Reconstructive Surgery Global Open, Casabona and Pereira treated 20 women with skin laxity and cellulite on the buttocks and thighs using microfocused ultrasound with visualization followed by diluted calcium hydroxylapatite, and blinded evaluators reported significant improvement in cellulite severity at 90 days.
That result belongs to a specific device paired with an injectable and cannot be transferred to another machine. Judge any device on the details the clinic puts in writing.
Evidence
Research behind this page
- A Single-Center, Blinded, Split-Body, Randomized Clinical Trial of High-Intensity, Parallel Ultrasound Beams Versus Microfocused Ultrasound With Visualization for the Treatment of Upper Inner Arm Skin LaxityDermatologic Surgery · 2025 · doi:10.1097/dss.0000000000004881
In a blinded split-body randomized trial of 14 women, a parallel-beam high-intensity ultrasound device and microfocused ultrasound with visualization both improved upper inner arm laxity at day 90, with similar pain scores.
- Microfocused Ultrasound with Visualization and Calcium Hydroxylapatite for Improving Skin Laxity and Cellulite AppearancePlastic and Reconstructive Surgery - Global Open · 2017 · doi:10.1097/gox.0000000000001388
In 20 women treated on the buttocks and thighs, microfocused ultrasound with visualization followed by diluted calcium hydroxylapatite was linked to significant improvement in blinded cellulite severity ratings at 90 days.
FAQ
Questions about Ultherapy in Gangnam
Is Dualsonic the same machine as Ultherapy?
No, Dualsonic is a different device name, although both belong to the focused ultrasound family. Ultherapy is made by Merz Aesthetics and pairs its transducers with live imaging. Whether Dualsonic offers imaging, and which depths it uses, should be confirmed with the clinic in writing rather than assumed.
Does a Dualsonic session hurt?
Expect real discomfort during the deeper passes, even with numbing cream applied beforehand. Focused ultrasound heats small points beneath the surface, and over bone along the jaw this can feel like sharp heat or a brief ache. Tell the treating doctor if a pass feels too strong, since energy and spacing can be adjusted.
Can the device be used on the body as well as the face?
That depends on whether the machine has body cartridges, so ask the clinic before planning a body area. Some focused ultrasound systems, Ultherapy among them, have body versions with their own settings and counts. A body session takes longer and covers more surface. Confirm which cartridge will be used for each area, how the shots are counted, and what the clinic expects the treatment to change.
How can I check that the cartridge is genuine and new?
Ask to see the cartridge unsealed in front of you, with the maker's label visible before it is fitted to the handpiece. A genuine cartridge comes from the manufacturer of the machine itself, not a third party. A clinic used to international visitors will usually show this without fuss, and hesitation on this point is a fair reason to ask more questions before treatment starts.
When do results appear, and how long do they last?
Some tightness can be felt within days, but visible firming usually develops gradually over the following months. Ultrasound energy prompts new collagen to form, and that process takes time. How long the change lasts varies with age, skin quality and lifestyle, and many people plan a review before deciding on another session. Results vary from person to person.
What should I do if the clinic cannot name the maker?
Pause and ask for the device details in writing before agreeing to treatment. The maker, the cartridge depths and regulatory clearance are basic facts any clinic using a machine should know. Without them it is hard to judge whether the plan suits your face or how it compares with other options.