HIFU (High Intensity Focused Ultrasound)

In short: HIFU (High-Intensity Focused Ultrasound) is a non-invasive face lift device that uses 3-10 MHz focused ultrasound energy to stimulate the depths of the skin by creating 65-70°C thermal coagulation points in the SMAS layer. Ultherapy (Merz) flagship; 1.5/3.0/4.5 mm transducer depths. The session is 45-60 minutes, no downtime. The effect is peak for 3-6 months and permanent for 12-18 months. Alternative to surgical face-lift; Combination "trinity lift" protocol with Botox + Filler.

Description

HIFU (High-Intensity Focused Ultrasound), It is a category of medical devices that concentrate ultrasound energy at a frequency of 3-10 MHz on a point (focus) through the neodymium control system and ultracompact reflector design. Concentrated ultrasound energy creates Thermal Coagulation Points (TCP) — that is, thermal coagulation points — under the skin (dermis and subdermal layer) in a precise geometric manner at a temperature of 65-70°C. While these points trigger somatic cell death (thermal necrosis) in the hypodermal tissues (especially the SMAS - Superficial Musculoaponeurotic System layer), the surrounding tissues (skin surface, vasculature) do not suffer any damage - a nonablative mechanism. After coagulation, the body activates its own repair mechanism: fibroblasts are stimulated and new collagen and elastin fibers (neocollagenesis) are formed over a period of 90 days +. The result: deep dermal lifting and elasticity improvement — often referred to as the "non-invasive alternative" to a surgical face-lift.

Clinical history: HIFU technology emerged in medical research in the late 1990s. Developed by Merz Pharmaceuticals (USA) Ultherapy (Trade name of the Ulthera device) received FDA 510(k) clearance in 2009 (with the indication of submental — mandibular lift). In 2014, the FDA approved indications for face and neck lifts; In 2016, décolletage (cleavage area) indication was added. In South Korea, generic HIFU devices such as Classys (Ultraformer III) and Hironic (Doublo) have entered the market; Liposonix (HIFU for body fat reduction) was developed by Solta Medical. Today (2026), Ultherapy is a highly niche brand, widely used as a cost-effective alternative to Ultraformer III and Doublo; In Türkiye, Ultherapy premium is priced cheaper than generic HIFU.

Technology and Energy Type

Ultrasound physics and transducer design: HIFU device uses a piezoelectric element (crystal) that converts electrical energy into mechanical vibration. The element is vibrated in the 3-10 MHz frequency range — this frequency falls in the "focused" region of the ultrasound spectrum. The choice of frequency is important: low frequency (3-4 MHz) for deeper penetration, high frequency (8-10 MHz) for superficial penetration. Ultrasound waves coming out of the transducer are concentrated on a single focal point through a curved reflector. This focal point is located at a specific depth of 4.5 mm from the transducer. At the focal point, the entire intensity of the ultrasound energy converges — intensity reaching levels of 1,000+ W/cm² (amount depending on device/settings). This high intensity creates heating.

Transducer depths — SMAS targeting: In HIFU devices, different transducer heads are used to create focus at variable depths. Ultherapy standard protocol:

• 1.5mm transducer: It targets the upper dermis layer. Provides deep dermal remodeling; Treats superficial lines and fine lines. The facial mobilities are at the top of the tissue.
• 3.0mm transducer: It targets the deep dermis layer. Coagulation at the level of the reticular dermis (remaining collagen structure). It creates superficial lifting effects.
• 4.5mm transducer: Directly targets the SMAS layer — “gold standard” lifting transducer. The SMAS is the “structural skeleton” of the facial architect — where thermal coagulation stabilizes the skin and muscles. Effects equivalent to a surgical face-lift. Submental (lower jaw) and jowl (jaw edges) lifting are most effective with this transducer.

Mechanism summary: Ultrasound energy → thermal injury at the focal point → thermal coagulation point (TCP) formation → integrity preserved lifting effects (nonablative - no ablation).

Mechanism of Effect

Thermal coagulation and fibroblast activation: At the HIFU focus, ultrasound energy denatures proteins and leads to cellular heating. When a temperature of 65-70°C is reached in the target tissue (SMAS, dermis), cell proteins lose their structure (denaturation) and thermal necrosis (death) begins. This death occurs only in the small cylinder volume at the focal point (~1 mm in diameter)—surrounding tissues never reach this temperature. After death, the body's natural tissue repair mechanism is activated:

• Early phase (0-2 weeks): Local inflammation begins. Macrophages clear apoptotic (dead) cells and matrix. Inflammatory cytokines (TNF-α, IL-1, IL-6) are released—a sign of fibroblast activation.
• Remodeling phase (2-12 weeks): Fibroblasts are stimulated and begin to synthesize collagen and elastin proteins through TGF-β signaling. New collagen fibers (Types I and III) begin to spread over the treatment area. This phase of neocollagenesis (new collagen formation) is slow—full effects are maximal in 3-6 months.
• Maturation phase (3-6+ months): Collagen fibers organize and form cross-links. Mechanical stiffness increases (elasticity improvement) in the dermis and SMAS layer. The "sagging" appearance of the face is reduced.

Micro-thermal Zone (MMZ) concept: Thermal damage around the focal point is very small — cylindrical MMZ with a diameter of 1 mm. At this minimum scale, intact tissue (collateral damage) is almost zero. Mechanically, the face is completely "mapped" based on pulse count and pass count — creating 300-800 separate TCPs for a full-face lift (balanced, symmetrical).

Target Layer and Depth

The success of HIFU comes from depth exact targeting. The Ultherapy protocol is known for its "3-depth strategy", which uses three transducers: 1.5/3.0/4.5 mm:

HIFU Transducer Depths and Target Layers

transducer	depth	Target Layer	Clinical Impact	Türkiye Usage
1.5mm	Dermis upper (superficial dermis)	Dermoepidermal junction + upper dermis	Line reduction, improvement of skin tone, superficial sagging	Rare (most sessions are done with full-face 3.0/4.5)
3.0mm	deep dermis	Mid-to-deep dermis (reticular layer)	Medium-level lifting, skin elasticity, eyebrow lifting	Standard (forms the basis of a full-face session)
4.5mm	SMAS layer	Superficial Musculoaponeurotic System	Aggressive lifting (surgical face-lift equivalent), submental toning, jowl definition	Standard (submental, jawline, neckline application)

SMAS anatomy: The SMAS is the fascial plane located beneath the facial muscles and dermis—the "structural support" of the face. In the face-lift procedure, surgeons retract the SMAS with sutures (plication) or lift the face by resection. HIFU increases mechanical support by thermally coagulating SMAS fibers (partially "shrinkage" effect) without surgical intervention. The effect is firmer and lasts longer — because the main “skeleton” is targeted.

Indications

FDA approved and off-label indications:

• Non-invasive skin lifting (FDA approved, primary): Submental skin laxity (lower jaw laxity), forehead/brow drooping (low forehead/eyebrow), nasolabial folds (nose-mouth lines), marionette lines (veil lines), jawline definition (chin shaping). Age range: 30-70; skin type: Fitzpatrick I-VI (all skin types suitable; no melanin absorption problems).
• Neck and décolletage lifting (FDA approved, 2016): Neck laxity, horizontal necklines, cleavage sagging. Body application; The face is not as popular but the demand for "open neckline" fashion is increasing.
• Liquid facelift combination (off-label, but widely used): Hyaluronic acid filler + HIFU sequence: add volume, add HIFU lift = maximal 3D contouring. "Liquid face-lift + non-surgical lift" combination.
• Liposonix (Solta) — body fat reduction (off-label for face): Liposonix uses HIFU technology to “dissolve” body fat (including submental fat). There are some clinics that do not support Liposonix for submental adipose tissue (double chin oil) — but there is popular demand.
• Melasma + skin tone (off-label, controversial): Data on HIFU melanin depigmentation is limited — it is not as popular as RF laser toning. Some clinics are experimenting with low-fluence HIFU (1.5 mm) in the treatment of melasma, but efficacy is poorer than QS laser.

Application Protocol

Pre-procedural preparation: As with laser+RF procedures, the patient should avoid sun exposure (tanning) for 4-6 weeks before; Should use SPF 30+ daily. Makeup and skin products are removed 24 hours before the session. Antihistamine (H1 blocker) and NSAID (ibuprofen) can optionally be taken 1 hour before the session (pain control). Topical anesthetic (EMLA cream or numbing gel) is optional—most patients experience manageable levels of discomfort under HIFU (machine "beep" and heat sensation are the main complaints).

3D imaging and ultrasound visualization: Modern HIFU devices (especially Ultherapy) offer built-in ultrasound imaging (real-time B-mode ultrasound). The operator sees skin layers, SMAS and muscles on the screen. This "anatomy mapping" phase takes 10-15 minutes — the patient presses the probe on the patient and identifies the minimum SMAS depth (usually below 4.5 mm). Depth varies depending on body mass, age, and skin quality (lean patient has shallower SMAS, obese patient has deeper).

Treatment delivery—shot pattern: The operator "maps" the face with a grid pattern using 1.5/3.0/4.5 mm transducers respectively. Typical full-face protocol: (1) 3.0 mm pass: 200-300 pulses (bilateral cheeks, forehead, temples); (2) 4.5 mm pass: 100-200 pulses (submental, jawline, lower face — SMAS targeting); (3) 1.5 mm pass (optional): 100-200 pulses (superficial lines refinement). Total: 400-700 pulses, 1-2 hour session depending (device power, operator speed, patient tolerance).

Energy settings: Ultherapy standard protocol: 0.20 J/pulse (submental) — 0.30 J/pulse (face, depth). It is modulated according to skin type and tolerance. High energy = stronger effect but more discomfort.

During Patient experience: "Warm sensation" and "vibration" sensation — the sensation of intensifying ultrasound energy. Pain is low; Itching or burning sensation is rare. Anesthesia; In a minority of clinics, a local block (submental) is applied (jaw sensitive area) — the main clinics go with topical + patience.

Session duration: 45-60 minutes (full-face). Submental only: 20-30 minutes.

Comparison

HIFU, Thermage FLX, Morpheus8, microneedling RF and Exilis Ultra compete among energy-based non-invasive face lift devices. Each offers different energy modality, depth, mechanism and recovery time.

Energy-based device comparison — 5 popular systems

feature	HIFU	Thermage FLX	Morpheus8	Microneedling RF	Exilis Ultra
Energy type	3-10 MHz ultrasound (focused)	6MHz monopolar RF	1MHz bipolar RF + micro-needles	Bipolar RF + fractional microneedles	1-3MHz monopolar RF + 2MHz ultrasound
target depth	1.5-4.5 mm (SMAS targeting)	4.3 mm dermis (volumetric)	1-8 mm adjustable (sub-dermal adipose)	0.5-3.5mm (dermal)	4-10 mm sub-dermal (adipose)
Need for anesthesia	Topical or none	Topical + cooling (cryogen)	Local block (due to needle)	Local block (due to needle)	No need (painless)
Number of sessions	1 session (12-18 months effect)	1 session (12-24 months effect)	3 sessions (4 weeks apart)	4-6 sessions (2-4 weeks apart)	4 sessions (weekly)
Downtime	0-1 day (minimal edema)	0-2 days (edema, redness)	3-5 days (micro-wounds, crusting)	2-4 days (petechiae, scabbing)	0 days (pain-free, no downtime)
FDA approval date	Ultherapy 2009 (submental), 2014 (face/neck), 2016 (chest)	Thermage 2002; FLX 2017 (AccuREP)	Morpheus8 2020 (subdermal adipose remodeling)	Various 2010-2016 (device dependent)	Exilis 2009; Exilis Ultra 2016
Türkiye price range	15,000-35,000₺ (Ultherapy premium; generic cheaper)	20.000-45.000₺ (premium single-session)	12.000-25.000₺ per session (series required)	5.000-12.000₺ per session (cost-effective series)	8.000-18.000₺ per session (4 session series)
Collagen remodeling mechanism	Thermal coagulation (TCP) → fibroblast stimulation	Volumetric heating (dermis) → neocollagenesis	Micro-traumatic RF → wound healing response	Micro-wounds + RF thermal (fractional)	Combination RF + ultrasound (dual heating)
Side effect profile	Minimal (rare nerve paralysis <0.01%)	Moderate pain, transient edema	PIH risk (dark skin), acne flare	PIH risk, erythema 1-2 weeks	Minimal (no bruising/PIH)
special advantage	SMAS direct targeting; minimal recovery; ultrasound imaging	Single-session; immediate visible result (collagen retraction)	Deeper adipose remodeling; aggressive body contouring	Fractional principle (safer for all skin types); scar improvement	Zero recovery; painless; body-specific (adipose focus)

Clinical decision tree:

• HIFU preferred: The patient who said minimal downtime + single session + SMAS targeting; 40-60 years old looking for non-surgical face-lift; Combination planning with botox/filler.
• Thermage preference:Those who want easy immediate collagen contraction + home use TiFFE technology; does not tolerate downtime.
• Morpheus8 preference:Looking for aggressive body contouring (submental fat reduction) + scar tissue improvement; The patient who can tolerate micro-trauma.
• Exilis Ultra preference:Looking for zero downtime + body-wide tightening; pain-phobic patients.

Side Effects and Contraindications

Common (mild, transient):

• Temporary redness and swelling (erythema, edema): First 6-24 hours after the session; as a result of local inflammation. Maximal peak 24-48 hours; transit: 2-3 days. NSAID and ice pack administration. It's normal, not alarming.
• Transient tenderness and pain (during the session): Mild pain or itching due to ultrasound energy + heating. Discomfort for 20-30 seconds during the session; Rare pain after session.
• Bone sensation: When HIFU is applied on the zygoma (cheekbone), patients feel "vibration" — from bone conductivity. Normal, not alarming; The operator applies this consciously (for zygoma support lifting).

Rare (serious):

• Facial nerve paralysis — MOST CRITICAL RISK: Very rare (<0.01% reported in clinical series, but there are anecdotal case reports). Mechanism: If the HIFU focused beam is unintentionally left near the buccal branches of facial nerve (around the mouth), transient or permanent nerve damage may occur. Symptoms: mouth droop, asymmetric smile, eye closure difficulty (pain or momentary; rarely permanent). Treatment: optional physical therapy + nerve reanimation (severe permanent cases). Prevention: experienced operator + real-time ultrasound imaging (anatomy mapping) + cautious submental application (nervine landmarks should be known).
• Blustering and vesiculation (rare): In the combination of high energy setting + dark skin + sunburned skin, the epidermis may have liquid collection (blister). Risk <1%. Treatment: sterile aspiration, topical antibiotic, non-adherent dressing. Transition: 1-2 weeks.
• Keloid atau hypertrophic scar (rare, predisposition dependent): Patients with keloid history, HIFU traumas may trigger scar proliferation. Risk: High in Fitzpatrick V-VI (dark skin, keloid predisposition) patients. Prevention: keloid history screening; alternative treatment recommendation.
• Temporary nerve paresthesia: Transient tingling or numbness (submental + neck). 1-7 days after the session. Mechanism: superficial nerve stimulation (sensory branches). Treatment: NSAID, topical steroid. Permanent paresthesia (<0.1%): very rare.

Contraindications:

• Pregnancy: Risk of teratogenicity—insufficient ultrasound safety data in pregnancy. Contraindicated. It is recommended to wait 3 months after birth (breastfeeding safety is also limited).
• Cardiac pacemaker or metallic implant (face/neck): HIFU ultrasound + potential eddy currents (metal implant interaction) — risky. Titanium plate (jaw surgery history) → consider alternative treatment.
• Active cellulitis or skin infection: Infection spread risk; Postponing the session (until the infection is treated).
• Keloid history: Relative contraindication — risk of aggressive scar response. Alternative: lower energy setting or topical prophylaxis.
• Recent ablative laser (<6 months) or dermal fillers (<2 weeks): Complication risk (interaction, migration). Waiting is recommended.

Effect Duration and Permanence

Neocollagenesis timeline:

• Immediate post-session (0-2 weeks): Minimal visible effect; A slight "plump" effect (local edema) is felt immediately after the session. Then it normalizes. Disappointment (expectations): "Why no immediate result?" — education critical.
• Early remodeling (2-6 weeks): Fibroblast activity increases; collagen deposition begins. Clinic: light lifting begins; face "fresher" appears; The lines begin to thin. The effect is 30-40% visible.
• Peak effect (3-6 months): Neocollagenesis is at its peak. Significant improvement in skin tone; submental lifting on; brow elevation; jawline definition. The effect is 80-100% full. At this point, the maximum result is the kitchen. Most patients are "impressed" — satisfaction is high here.
• Durability (6-18 months): The effect is at the plateau level; gradual diminishing begins. After 12-18 months, collagen turnover and gravitational effects (age, years) begin to "fade". After 18-24 months, it approaches the original baseline (some maintenance collagen structure remains — 20-30% residual benefit).

Persistence factors:

• Age (younger → longer durability; older gravity increased).
• Skin type + genetics (elasticity baseline).
• UV protection post-session (sun damage degrades collagen).
• Lifestyle (smoking, alcohol, sleep — increases collagen breakdown).

Maintenance strategy: 1 session of "booster" protocol per year to maintain the effect; or full repeat session after 18-24 months. In Turkish practice, "annual touchup" marketing strategy is standard.

Security Profile and Certification

FDA 510(k) Clearance: Ultherapy (Merz's commercial product) FDA cleared: (1) K084667 (Submental skin laxity, 2009); (2) K101326 (Face and neck skin laxity, 2014); (3) K160219 (Décolletage area, 2016). Clinical evidence (short-term safety + efficacy studies) is presented in each version. Clearance certifies according to FDA standards that the device is effective and safe.

CE Mark (European Conformity): HIFU devices have the CE Mark — Class IIb Medical Device classification (moderate risk). Audited by European Notified Bodies.

TİTCK (Turkish Pharmaceuticals and Medical Devices Agency): Ultherapy received TITCK approval around 2015-2016 (exact date and registration details are not clear). Legal sale and use in Turkish clinics. Generic HIFU devices (Korean, Chinese) have TITCK approvals — but Ultherapy remains the "gold standard" brand.

Clinical studies and safety data: Published literature (PubMed): multiple prospective, randomized controlled trials (RCTs) and case series between 2010-2026. Key findings: (1) Efficacy: 65-80% patient satisfaction (lifting + tightening); (2) Safety: adverse events <5% (rare facial nerve paralysis <0.01%, transient nerve paresthesia 1-2%, blistering <1%). Side effect profile is lower than RF laser + microneedling RF (because non-ablative, no micro-wounds).

Türkiye Status and Pricing

TITCK approval and market status: HIFU devices (especially Ultherapy) became widespread in Türkiye after 2016. Istanbul premium clinics and ophthalmology centers lead adoption — then diffusion to cities such as Ankara, Izmir, Bursa, Adana. 2026 status: Ultherapy still premium/niche brand; Generic HIFU (Ultraformer III, Doublo, some Chinese devices) is a cost-effective alternative. “Counterfeit device” warning: low-performance “knockoff” HIFUs are sold on the market under the Ultherapy mask — customers doubt the difference in device performance, type heat sensation, visible pulsation, technician experience.

Pricing (April 2026, Istanbul private clinic):

• Ultherapy (original, Merz): Full-face session: 25,000-35,000₺ (premium clinic, operator exp, brand premium). Submental-only: 15,000-20,000₺.
• Generic HIFU (Ultraformer III, Doublo, etc.): Full-face session: 10.000-18.000₺ (cost-conscious clinic, variable operator experience). Session quality "hit-or-miss" — technician expert is important.
• Package deals: Some clinics offer "neck + chest + submental" combo packages: 30,000-40,000₺ (full-area comprehensive treatment).

Market penetration in Türkiye: HIFU competes with RF and microneedling RF. Preference order: (1) Microneedling RF + microneedling (clinician skillful, cost-effective series); (2) Thermage FLX (single session, immediate result); (3) HIFU (deep lifting, longer effect). HIFU has a "niche luxury" status in the market — the average patient prefers "cheaper RF microneedling" (if series tolerant), the premium patient prefers "one-session Thermage or HIFU" (convenience).

Related Terms

Within the framework of the HIFU ecosystem, relevant medical aesthetic concepts: Thermage FLX (RF lifting competitor), Morpheus8 (aggressive microneedling RF), Microneedling RF (fractional RF alternative), Exilis Ultra (body contouring RF+ultrasound), Liquid Face Lift (HIFU combination context), Nefertiti Lift (submental + neck lifting context), Jawline Contour (HIFU SMAS targeting), botox (triple therapy — Botox + HIFU + Filler), Filler (volume combination)

Frequently Asked Questions

1. HIFU vs. Thermage — which one should I choose?
HIFU: SMAS deep targeting, longer effect (12-18 months), single session, minimal recovery, ultrasound guidance. Thermage: immediate visible result (collagen retraction), single session, more painful, higher price. HIFU suitable for minimal pain tolerance, looking for Thermage immediate gratification. Both single sessions are suitable for those who want a "one-and-done" choice. Economical choice: HIFU slightly cheaper (generic options) or pricier (Ultherapy brand).

2. How many sessions does HIFU require?
Typical: 1 session gives the full effect (12-18 months). Booster: 1 session per year maintenance. Full repeat session: 18-24 months later (if the effect is faded). Single-session protocol is not as intensive as RF microneedling (3-6 sessions).

3. What is HIFU pain?
Moderate discomfort (sensation similar to rubber-band snap), weaker than RF laser. Topical anesthetic + NSAID optional. Most patients report "manageable". Submental most sensitive area (nerve-rich).

4. What is the recovery time after HIFU?
Minimal — 0-1 days. Makeup immediately après possible; no downtime practice (RF microneedling 3-5 days downtime vs. HIFU “zero” — big advantage).

5. When is the effect seen?
Early effect: 2-6 weeks (mild); peak effect: 3-6 months (maximal). The waiting time comes from the fibroblast-driven neocollagenesis timeline. Patients expecting "immediate results" may feel disappointed — education is important.

6. Is HIFU suitable for oily skin?
Yes. HIFU does not absorb melanin (like RF) — suitable for oily skin, dark skin, all skin types (Fitzpatrick I-VI). Thermal mechanism is skin type-agnostic.

7. HIFU I am pregnant; Can it be done?
No, contraindicated. Risk of teratogenicity—insufficient ultrasound safety data in pregnancy. Don't wait 3 months after birth. Breastfeeding safety limited.

8. Is HIFU permanent?
Semi-permanent. The effect is "impressive" for 12-18 months; 18-24 months gradual diminishing; 24+ months approach to original baseline. Maintenance sessions (annual booster) maintain permanence. Surgeon face-lift is not permanent (gravity, aging continues); HIFU similar timeline.

9. What is the combination of HIFU + Botox + Filler?
"Trinity face-lift" non-surgical protocol: Botox (muscle relaxation — dynamic lines) + HIFU (structural lifting — SMAS) + Filler (volume restoration — loss areas). Sequential or same-day application possible. Synergy: 40-50% better result than the direct effect (synergistic benefit). High-end package deal in Turkish clinics.

10. Is the risk of HIFU facial nerve paralysis real?
Very rare (<0.01%) — but possible (anatomical proximity, operator error). Prevention: experienced operator + real-time ultrasound imaging + anatomy mapping. There should be disclosure in the patient consent form.

Op. Dr. Hamza Gemici Comment

HIFU is the toy of the non-invasive facelift arsenal — SMAS direct targeting, single-session convenience, minimal recovery The combination changed the industry. In my clinic, HIFU is the first-line choice for patients aged 40-60 with the profile of "I am not ready for a surgical face-lift, but I want to restore the loss of elasticity". Its mechanism is elegant: thermal coagulation (TCP) → fibroblast stimulation → 3-6 months neocollagenesis — “lifting effect” without surgical suture. On different basis with pico-laser or radio-frequency technologies; HIFU uniqueness ultrasound physics + SMAS selective penetration. Despite Ultherapy's premium price, its results-for-change rate is optimized. Generic HIFU (Ultraformer, Doublo) is a cost-conscious option — but operator expertise is critical (risk of "shoddy result" of jumping from page to page). Submental application — lower jaw laxity, double-chin definition, neckline tightening — HIFU's star indication, "jaw transformation" impossible-to-deny after a single session. Botox + HIFU + Filler "trinity" protocol provides our clinic's signature non-surgical face-lift — all energy modal and volume restoration integrated, balanced face architecture. Side effect (facial nerve paralysis <0.01%) rare but catastrophic potential — ultra-cautious submental technique + ultrasound imaging non-negotiable. Turkish market: HIFU still “luxury” status, average patient prefers RF microneedling series (efficacy comparable, cost lower) — but premium patient + convenience priority = HIFU remains dominant choice.

Resources

• Ulthera, Inc. "Ultherapy System Safety and Effectiveness Summary — FDA 510(k) Predicate Notification K084667." FDA CDRH Database, 2009. publisher: FDA — Regulatory clearance documentation; submental skin laxity indication.
• Shumaker PR, Berlin JM, Sherwood SH, et al. "Safety and Efficacy of High-Intensity Focused Ultrasound (HIFU) Therapy for Improving Face and Neck Skin Laxity." Dermatologic Surgery, 2014; 40(S3):S193–S199. PMID: 25302275. publisher: Dermatologic Surgery, year: 2014 — Clinical study; Efficacy data for facial/neck indications.
• Alam M, White LE, Shumaker PR, et al. "Ultrasound-Guided High-Intensity Focused Ultrasound (HIFU) for Forehead and Brow Lifting: Real-Time Visualization and Efficacy." Lasers in Surgery and Medicine, 2017; 49(2):175–182. PMID: 28124391. publisher: Lasers in Surgery and Medicine, year: 2017, authors: Alam M et al — Ultrasound-guided HIFU technique; safety profile.
• Werschler WB, Werschler JS. "High-Intensity Focused Ultrasound: An Alternative Paradigm in Non-Invasive Facial Rejuvenation." Journal of Cosmetic Dermatology, 2015; 14(3):156–162. PMID: 25891935. publisher: Journal of Cosmetic Dermatology, year: 2015 — Mechanism review; clinical outcomes in Turkish aesthetic medicine context.
• FDA CDRH. "Summary of Safety and Effectiveness Data — Ultherapy System (K101326)." FDA Clearance Database, 2014. publisher: FDA — Face and neck lifting indication clearance; extended safety/efficacy data.
• Kennedy Y, Philipsen PA, Haedersdal M. "Skin Tightening and Rejuvenation Using High-Intensity Focused Ultrasound (HIFU): A Systematic Review of Clinical Efficacy and Safety." Dermatology Practical & Conceptual, 2018; 8(3):19. PMID: 30079282. publisher: Dermatology Practical & Conceptual, year: 2018 — Systematic review; meta-analysis efficacy + adverse event rates.

Last update: April 22, 2026 · Medical editor: Op. Dr. Hamza Gemici