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Console screen showing the live ultrasound image of the skin layers during a focused-ultrasound lifting session at Dear Clinic
Dear Clinic · Procedure Guide · Lifting
Two energy families, four installed platforms · Cheongdam, Gangnam, Seoul

HIFU vs RF Lifting in Korea

Focused ultrasound concentrates energy into separate points at a set depth. Monopolar radiofrequency warms a whole volume of tissue that its field passes through. Every other difference between the two families — the layer treated, the unit you are billed in, how a session feels — follows from that one distinction.

Focused ultrasound · 2 platforms Monopolar RF · 2 platforms Open 365 days
Ask Which Family Fits See the Comparison
The Short Answer

Focused points against a heated field

Focused ultrasound sends sound waves that converge on a tiny focal point, and only that point gets hot enough to matter. Monopolar radiofrequency passes current through tissue, and everything in the path of the field warms together. Concentration against distribution: that is the whole of it.

Follow the consequence and the rest of the comparison writes itself. Because ultrasound converges, the depth of the focal point can be selected, which is how a treatment reaches the fibrous support layer beneath the fat while leaving the skin above it alone. Because radiofrequency spreads, depth is governed by field geometry and surface cooling, so what it reliably treats is the thickness of skin the field crosses.

Both families are installed on these two floors and both are run daily, which is why this page can afford to describe them plainly. The full list of lifting platforms sits on the lifting and tightening page, and the lifting guide starts further back than this comparison does.

Shurink Universe focused ultrasound system with its face and body handpieces docked on either side of the console at Dear Clinic
One of the two focused-ultrasound platforms in the building. A transducer cartridge fixes the depth the sound converges at; the console counts the lines it places.
The Two Families

Each family runs at two tiers in these rooms

Neither family is a single product. Each holds an accessible platform and a premium one, so choosing a family is only half the decision.

FAMILY A — FOCUSED ULTRASOUND

Ultherapy Prime and Shurink Universe

Ultherapy Prime is micro-focused ultrasound with visualization. DeepSEE imaging puts the layers under the transducer on screen during the session and reads to 8 mm before a line is placed. Its focal depths are 1.5, 3.0 and 4.5 mm, the deepest reaching the SMAS, and sessions are billed in 100-shot increments.

Shurink Universe is focused ultrasound without live imaging, positioned here for entry and for maintenance between larger sessions. It is quoted by the 300-shot block, which keeps a first ultrasound session or a routine top-up within reach.

FAMILY B — MONOPOLAR RADIOFREQUENCY

Thermage FLX and Density

Thermage FLX is monopolar radiofrequency aimed at tightening and texture through the thickness of the skin. AccuREP calibrates every pulse to the tissue in front of it, and a full-face session runs through a single 600-shot tip, which is why it is priced as one session.

Density is high-density monopolar radiofrequency built around three tip grades — Classic, High and Alpha — each quoted per 300 shots at its own rate. That turns radiofrequency into something you can start gently and escalate.

So there are four answers on this floor. A reading that points at ultrasound still has to choose between imaging-guided precision and accessible upkeep, and one that points at radiofrequency still has to choose between a single calibrated tip and a three-grade escalation.

Side by Side

HIFU against RF, row by row

The two families as they are actually run here. On a phone the table slides sideways while the row labels hold their place.

 Focused ultrasound (HIFU)Monopolar radiofrequency (RF)
Platforms hereUltherapy Prime, Shurink UniverseThermage FLX, Density
How energy arrivesSound waves converge on separate focal pointsCurrent flows through a field and warms the volume inside it
What that does to tissueDiscrete points of coagulation on a planned lineBulk heating across a treated zone
Depth selected byThe transducer cartridge — 1.5, 3.0 and 4.5 mm on Ultherapy PrimeField geometry and surface cooling, across the thickness of skin
Layer usually addressedFibrous deep support, down to the SMAS on the deepest lineThe dermis, broadly and evenly
Operator sees the layerOn Ultherapy Prime, yes — DeepSEE imaging to 8 mmNo imaging; calibration and cooling govern the pass
Billed inShots — 100-shot increments, or a 300-shot blockTips and shot blocks — a 600-shot tip, or 300 shots per tip grade
Complaint it answersSupport that has loosened and contour that has descendedSkin that has gone slack and finely crepey across a whole area
Sensation, in principleBrief deep pricks of heat, one per line placedWaves of warmth with cooling between pulses
Recovery, in principleRedness and warmth; tenderness along the treated linesRedness and warmth; a tight feeling across the zone
Listed rate at Dear₩400,000 / 100 shots · ₩150,000 / 300 shots₩1,900,000 / 600-shot tip · ₩700,000 / 300 shots, entry tier
Used togetherYes — different depths, sequenced from one readingYes — sequenced, never stacked on the same spot

The table describes the physics and the price card. Which row ends up on your chart is settled after the EVE Muse capture measures your skin thickness and locates the depth your slackness actually sits at.

Case by Case

Which slack face belongs to ultrasound, and which to radiofrequency

A reading places you in one of four groups, and the fourth is the one worth reading carefully.

POINTS AT ULTRASOUND

Contour that has come down

A jaw border blurring into the neck, a mid-face that has slid, heaviness gathering low by evening. Descent is a deep-support problem, and support is where converging sound can put energy without cooking the skin above it.

POINTS AT RADIOFREQUENCY

Skin gone slack across a whole area

Fine crepe on the cheek, a surface that no longer springs back when pressed, looseness spread evenly with no single line dropped. A broad heated field matches a broadly distributed complaint.

POINTS AT BOTH

Two findings at two depths

Descended support and a slackened surface often arrive together, and one family cannot reach both. The families are then sequenced in an order your director writes, with the interval set at review.

POINTS AT NEITHER

Findings that heat will not fix

Emptied volume reads as sagging in a mirror and answers to a filler plan. A clear vector of descended tissue may belong to threads. Where the reading says either of those, we do not recommend an energy session and the reason is given in the room.

Feel and Recovery

Why the two families feel different in a predictable way

Sensation follows the physics, not the badge on the console. Focused ultrasound concentrates energy into brief events at depth, so it is usually described as short, deep pricks of heat, each arriving as a line is placed and fading at once. Radiofrequency spreads energy over an area and over time, so it is usually described as building warmth with a cool interval between pulses. Neither description promises anything about your own tolerance.

Recovery follows the same logic. Neither family breaks the surface, so what people typically report afterwards is redness and warmth that settles, sometimes with tenderness where the deepest lines went or a tight feeling across a heated zone. Both are low-downtime treatments and neither is risk-free. Burns, a hollow where energy has been over-concentrated, and temporary numbness along a nerve branch are the failures both technologies share, and each is a question of depth, spacing and energy.

Timing is the other shared trait. Both families work by provoking tissue to remodel, so the visible part of the change accumulates in the weeks after a session instead of appearing as you leave. How long it holds varies with age, skin quality and how you live, and Dear Clinic publishes no fixed figure for it. Comfort measures are confirmed at your consultation.

Sequencing

Running an ultrasound line and a radiofrequency pass in one plan

Two findings at two depths take two tools, and a combination is legitimate precisely because the families do not overlap. What makes it illegitimate is stacking energy on the same spot in one sitting. So combinations here are sequenced with an interval, planned from a single capture, and written down before the first handpiece is lifted.
One EVE Muse capture plans both halves, so the sequence is designed as a single course
The interval between the two sessions is set by your director and recorded at review
Where the capture finds one depth involved, one platform is quoted and the second is left off the plan
Energy is never re-passed over a zone that has already had its allocation in the same sitting
Dear, Knowhow

How a director picks an energy family before picking a device

Four of the eight lifting options in this building are on this page; XERF, Onda, New Titanium and thread lifting make up the rest. The capture is what narrows that list.

01 — DIAGNOSIS FIRST

The capture names a depth before a brand

EVE Muse images the face in 3D under five light sources with AI analysis, mapping skin thickness zone by zone. A reading weighted toward deep descent argues for a focal line; one weighted toward surface slackness argues for a heated field. The measurement comes before any platform is named.

02 — THE FULL ARSENAL

Four energy platforms, no quota on any of them

Both families are already installed and paid for here, so the recommendation is not steered by what needs using. That includes recommending the entry tier, or recommending that you leave without booking an energy session at all.

03 — DIRECTOR-PERFORMED

Certified platforms, and the settings behind them

Dear holds Merz certification for Ultherapy under Dr. Jemin Kim and Dr. Seonhaeng Lee, and Thermage certification for three consecutive years. Every session here is director-performed, because a focal line placed at the wrong depth spends shots for nothing and a field held too long in one place can burn.

Ultherapy Certified Treatment Provider certificate issued by Merz, held at Dear Clinic
Ultherapy Certified Treatment Provider certificate from Merz — two directors hold it, and both are named above.
Thermage system viewed head-on with its handpiece and treatment tip in the cradle
Thermage system viewed head-on with its handpiece and treatment tip in the cradle
In the clinic

The devices and hands behind this treatment

Ultherapy Prime system at Dear Clinic Cheongdam, seen from the front with its treatment screen
The planning screen is read before the first focal line is placed
Hand in a white coat holding the Thermage handpiece with a treatment tip fitted at Dear Clinic
A radiofrequency tip is opened only after the session on the quote has been agreed
Pricing

What the two energy families are listed at in Cheongdam

Focused ultrasound is sold by the shot and radiofrequency by the tip, so the two families cannot be compared on their headline numbers alone. Ultherapy Prime is ₩400,000 (≈ $285) per 100 shots and is planned in 100-shot units; Shurink Universe is ₩150,000 (≈ $105) per 300 shots. Thermage FLX is ₩1,900,000 (≈ $1,355) for a 600-shot tip, and Density starts at ₩700,000 (≈ $500) for 300 shots on the entry tip grade.
SessionUnit it is sold inPrice
Ultherapy Prime100 shots; the shot count for a face is set from the capture₩400,000 (≈ $285)
Shurink Universe300 shots; the accessible ultrasound tier for a first session or upkeep₩150,000 (≈ $105)
Thermage FLXOne 600-shot tip, AccuREP calibrated, for a full-face session₩1,900,000 (≈ $1,355)
Density — Classic tip300 shots on the entry grade; the High and Alpha grades are quoted separately₩700,000 (≈ $500)

One published card covers everybody, with the same figure whether you live in Gangnam or arrived last night. KRW is the amount that settles at the desk; the USD figure beside it is for reference. Your shot count, tip grade and total are approved at the consultation, and the full card is on the published price list.

Caution

How either energy family goes wrong, and who we turn down

The two technologies fail in the same ways, because both of them are heat delivered into living tissue.

The ordinary reactions. Redness and warmth immediately afterwards, tenderness along treated lines or across a heated zone, and occasional swelling or bruising. These settle on their own.
The uncommon ones. Temporary numbness or tingling along a nerve branch, a blister or burn where energy was over-concentrated, and a hollow in a thin area that received more than it should have. Depth, spacing and energy prevent all three.
Who is postponed or declined. Active skin infection or inflamed acne in the zone postpones a session. Pregnancy changes what is appropriate. An implanted electronic device in the field rules out radiofrequency. Where the capture reads volume loss or a clear descended vector, we do not recommend either family.
What the week after asks of you. Keep away from saunas, hot yoga and alcohol while the heat response settles, and leave acids, retinoids and abrasive scrubs out of the routine for the first days.
Call, do not wait it out. Any mark, blister, numbness or asymmetry that outlasts a few days is reviewed by the director who ran the session, ahead of the booked follow-up.
Medical Team

Five doctors, one standard

Director-performed treatment is a Dear promise — your procedure is planned and performed by the doctors below.

Dr. Jemin Kim — Medical Director and Founder, Dear Clinic
Dr. Jemin Kim
Yonsei University College of Medicine
Medical Director · Founder
Dr. Sanghyun Lee — Director, Dear Clinic
Dr. Sanghyun Lee
Seoul National University College of Medicine
Director
Board-certified · Family Medicine
Dr. Seonhaeng Lee — Director of Aesthetic Medicine, Dear Clinic
Dr. Seonhaeng Lee
Chosun University College of Medicine · Residency, Samsung Medical Center
Director, Aesthetic Medicine
Dr. Daeun Jung — Director, Dear Clinic
Dr. Daeun Jung
Ajou University College of Medicine
Director
Board-certified · Family Medicine
Dr. Woojae Jung — Director of Aesthetic Medicine, Dear Clinic
Dr. Woojae Jung
Seoul National University — B.S. in Medicine
Director, Aesthetic Medicine
Patient Reviews

What our patients say

Real verified reviews from our Google Business Profile.

4.9★★★★★ 310 Google Reviews
FAQ

HIFU against RF lifting, question by question

What is the actual difference between HIFU and RF lifting?
Focused ultrasound converges sound waves on separate focal points, so only those points are treated and their depth can be selected. Monopolar radiofrequency drives current through tissue and warms the whole volume the field crosses. Concentration against distribution is the root difference.
Which of the two families treats the deeper layer?
Focused ultrasound, when it is set to do so. On Ultherapy Prime the focal depths are 1.5, 3.0 and 4.5 mm, and the deepest of those reaches the SMAS, the fibrous support layer beneath the fat. Monopolar radiofrequency works above that, through the thickness of the skin, which is a different target and not a lesser one.
My jawline has dropped. Which family should I be asking about?
Descent is a deep-support finding, so the reading usually points at focused ultrasound. Radiofrequency firms the skin lying over the jaw without moving the structure underneath. Where the capture finds descent and surface slackness together, the two families are sequenced from one plan.
Is radiofrequency just a cheaper version of HIFU?
No, and the price card shows why that assumption breaks: a 600-shot radiofrequency tip is the highest single-session figure on this page. They are separate technologies aimed at separate depths, and the cheaper choice within either family is its accessible platform.
What do the four platforms cost at Dear Clinic?
Ultherapy Prime is ₩400,000 per 100 shots, Shurink Universe ₩150,000 per 300 shots, Thermage FLX ₩1,900,000 for a 600-shot tip, and Density ₩700,000 for 300 shots on the Classic tip grade. The High and Alpha grades carry their own rates, quoted at the consultation.
Does focused ultrasound hurt more than radiofrequency?
They are felt differently and the difference is structural. Ultrasound concentrates energy into brief events at depth, so it reads as short, deep pricks of heat as each line goes in. Radiofrequency spreads energy over an area, so it reads as building warmth with cooling between pulses. Comfort measures are confirmed at your consultation.
How much recovery does each family need?
Neither breaks the surface, so most people report redness and warmth that settles, sometimes with tenderness along the treated lines or a tight feeling across the zone. Both are low-downtime treatments and neither is risk-free. Leave saunas, hot yoga and alcohol alone while the heat response settles.
Can a HIFU device and an RF device go into one plan?
Yes, in sequence, and only because the families reach different depths. What is never done is stacking energy on the same spot in one sitting. Both halves are planned from a single EVE Muse capture, the interval is set by your director, and if only one depth is involved only one platform is quoted.
Why are there two machines inside each family?
Because the family answers the question of depth and the platform answers precision and budget. Within ultrasound, Ultherapy Prime adds DeepSEE imaging that reads your layers to 8 mm while treating; Shurink Universe is the accessible tier. Within radiofrequency, Thermage FLX is a single calibrated tip and Density a three-grade escalation.
When is neither HIFU nor RF the right answer?
When the finding is not laxity. Emptied volume in the mid-face reads as sagging in a mirror but responds to a filler plan, and a single clearly descended vector may belong to threads. In both cases we do not recommend an energy session and say which category the answer sits in.
What can go wrong, and who do you refuse to treat?
Redness, warmth, tenderness, swelling and bruising are the common ones. Temporary numbness along a nerve branch, a burn, or a hollow where energy was over-concentrated are the uncommon ones, and both families share them. We postpone over active infection or inflamed acne in the zone, treat pregnancy as a reason to wait, and do not run radiofrequency where an implanted electronic device sits in the field.
Can I be scanned and treated on the same day, and do visitors pay the same?
Usually yes to both. The capture and the director consultation take about half an hour between them and all four platforms are kept ready, so a session can follow the same afternoon once suitability is confirmed. One card covers every passport, and we are open 365 days a year, answering English enquiries as soon as possible.
Consultation

Ask which energy family your own reading points to

Describe what has changed and we will name the layer it is coming from. Answered in English as soon as possible.

Scientific Evidence

Published work behind focused ultrasound and radiofrequency tightening

Six indexed entries are listed below. Three concern focused ultrasound: a review of non-invasive ultrasound tightening techniques, a quantitative study of face and neck tightening with micro-focused ultrasound with visualization in Asian patients, and a prospective study of intense focused ultrasound on the neck and lower face. Three concern radiofrequency, including a randomised split-face trial that compared monopolar radiofrequency directly against micro-focused ultrasound with visualization.

Each is given as title, journal and year with a verifiable DOI. No outcome figure from any of them is reproduced here, and none of them predicts what either family will do in your own face.

  1. Guillen Fabi S. Noninvasive skin tightening: focus on new ultrasound techniques. Clinical, Cosmetic and Investigational Dermatology. 2015. doi:10.2147/ccid.s69118
  2. Lu P, et al. Quantitative Analysis of Face and Neck Skin Tightening by Microfocused Ultrasound With Visualization in Asians. Dermatologic Surgery. 2017. doi:10.1097/dss.0000000000001181
  3. Friedman O, et al. Intense focused ultrasound for neck and lower face skin tightening a prospective study. Journal of Cosmetic Dermatology. 2020. doi:10.1111/jocd.13313
  4. Alhaddad M, et al. A Randomized, Split-Face, Evaluator-Blind Clinical Trial Comparing Monopolar Radiofrequency Versus Microfocused Ultrasound With Visualization for Lifting and Tightening of the Face and Upper Neck. Dermatologic Surgery. 2019. doi:10.1097/dss.0000000000001653
  5. Alexiades-Armenakas M, et al. Prospective Multicenter Clinical Trial of a Minimally Invasive Temperature-Controlled Bipolar Fractional Radiofrequency System for Rhytid and Laxity Treatment. Dermatologic Surgery. 2013. doi:10.1111/dsu.12065
  6. Kim J, et al. Fractionated microneedle radiofrequency for the treatment of periorbital wrinkles. The Journal of Dermatology. 2012. doi:10.1111/1346-8138.12046

References are provided for information — outcomes vary by individual and are assessed at your diagnosis. The last two describe fractional and microneedle delivery of radiofrequency, which are research contexts for the technology and not the monopolar platforms listed on this page.

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