
The Secret Behind Actress Son Ye-jin's Firm Skin: ULTLINE
- 5th-Generation High-Intensity Focused Ultrasound (HIFU)
- Targeted Lifting for the Face and Body
- Customized Lifting for Different Skin Layers
ULTLINE
Seoul Gangnam HIFU: ULTLINE vs Ultherapy PRIME
Let’s compare the key differences between ULTLINE and Ultherapy PRIME, two HIFU lifting options available in Gangnam, Seoul.

The Secret Behind Actress Son Ye-jin's Firm Skin: ULTLINE
Key Features
- 5th-Generation High-Intensity Focused Ultrasound (HIFU)
- Targeted Lifting for the Face and Body
- Customized Lifting for Different Skin Layers
ULTLINE
Hello,
I’m Dr. Ki-beom Park,
Medical Director of GU Clinic Gangnam.
When the facial contours begin to look softer or the cheeks
and jawline feel less firm than before,
many people start searching for HIFU lifting treatments.
HIFU lifting delivers focused ultrasound energy to targeted
depths beneath the skin without making incisions.
Even among ultrasound lifting devices, the available treatment depths,
delivery methods, and tissue visualization features can differ.
In this article, we will explain the principles and differences between ULTLINE and Ultherapy PRIME,
along with the points to consider when choosing an ultrasound lifting treatment in Gangnam, Seoul.

"How Does HIFU Lifting Work?"
HIFU lifting concentrates ultrasound energy at specific depths beneath
the skin to create thermal coagulation points.
By delivering energy to the targeted tissue layer,
it induces tissue contraction and supports collagen remodeling.
The face consists of several layers, including the skin, subcutaneous fat,
and the superficial musculoaponeurotic system.
Thin-skinned areas such as the forehead and around the eyes
may require different treatment depths from thicker areas such as the jawline.

FACE to BODY, ULTLINE
| Feature | Description |
|---|---|
| Targeted Body Contouring Care | Delivers energy to the fat layer at a depth of 13 mm |
| Customized Lifting by Skin Depth | Uses four cartridges for different treatment depths |
Personal Beauty · GU clinic .
"Son Ye-jin Lifting:
How Does ULTLINE Work?"
ULTLINE in Gangnam, Seoul uses multiple cartridges designed to deliver
ultrasound energy to various tissue depths across the face and body.
For facial treatments, energy can be distributed according to the area of concern,
from layers close to the skin’s surface to the dermal and superficial musculoaponeurotic layers.
ULTLINE can also deliver energy in either dot or line modes. Narrow areas can be treated in greater detail,
while energy can be distributed at regular intervals across wider areas.
Separate cartridges are available for the face and body,
allowing the device to be used for facial contours as well as areas
such as the abdomen, arms, and thighs.
👉 Learn More About ULTLINE HIFU Lifting

Ultherapy Prime
Key Features
- Real-time skin visualization is possible with 3D ultrasound imaging
- More even energy delivery with a wider handpiece
- More precise energy distribution technology
An upgraded version of the existing Ultherapy that precisely delivers energy to the SMAS layer, helping contract sagging tissue and restore skin elasticity.
Personal Beauty · GU clinic .
"How Is Ultherapy PRIME Different?"
Ultherapy PRIME is a focused ultrasound lifting device
that delivers energy while allowing the practitioner to
visualize the tissue beneath the skin.
Its DeepSEE™ ultrasound imaging technology provides real-time visualization of
the skin, fat, and superficial musculoaponeurotic layers.
The practitioner uses the tissue depth and condition shown on the screen to determine
the appropriate cartridge and treatment position.
Energy can then be delivered according to the area of concern,
from the superficial skin layers to the dermis and deeper supportive tissue.
However, the imaging feature does not mean that the same cartridge or
number of treatment lines is used for every face.
The treatment range should be planned after assessing skin thickness,
fat distribution, and the location of tissue laxity.
👉 Learn More About Ultherapy PRIME HIFU Lifting
Category | ULTLINE | Ultherapy PRIME |
|---|---|---|
Energy type | Focused ultrasound energy | Microfocused ultrasound energy with real-time imaging |
Facial treatment depths | 1.5·2.0·3.0·4.5mm | 1.5·3.0·4.5mm |
Delivery method | Dot and line modes | Thermal coagulation points delivered in lines |
Key feature | Combines multiple depths and delivery modes | Real-time ultrasound visualization of tissue layers |
Treatment areas | Customized planning for the face and body | Customized planning for areas including the face and neck |
Selection criteria | Skin thickness, fat distribution, and treatment area | Tissue depth, location of laxity, and the need for real-time visualization |
"ULTLINE vs Ultherapy PRIME:
What Are the Differences?"
Neither device can be considered the better choice for every person.
A thin face with fine lines and early loss of elasticity requires
a different treatment depth and delivery method from a face with
fuller cheeks and noticeable heaviness in the lower face.
Even when treating the entire face, the forehead, eye area, front cheeks,
side cheeks, and jawline may require different depths and energy settings.
Applying excessive energy to areas with little facial fat or targeting
a layer unrelated to the cause of laxity may result in changes that fall short of expectations.

"Your Facial Anatomy Should Come
Before the Device Name"
When searching for HIFU lifting in Gangnam, it is easy to compare
the device, price, or number of treatment lines first.
However, even with the same device, the treatment plan may vary depending on skin thickness,
facial fat, the location where laxity begins, and previous lifting treatments.
At GU Clinic Gangnam, we assess the skin, fat, and deeper supportive structures
before selecting between ULTLINE and Ultherapy PRIME and planning
the cartridge depth and treatment range.
If you want more defined facial contours and firmer-looking skin,
begin with a detailed consultation to identify the lifting approach suited to your facial anatomy.

Come as you are
"GU Clinic Gangnam Information"
Designated by the Ministry of Health and Welfare
as an Advanced Regenerative Medicine Institution
(Designation No. Regeneration-1-0036)
54 Seocho-daero 77-gil, Seocho-gu, Seoul
W Tower, 3rd and 4th Floors
* Near Sinnonhyeon Station Exit 7 and Gangnam Station
* Main line: +82-2-6241-0096
* Weekdays: 10:30 AM–9:00 PM
* Saturdays, Sundays, and public holidays: 10:30 AM–7:00 PM
(Closed on Lunar New Year’s Day and Chuseok)
*25 physicians
(Including specialists in plastic surgery,
dermatology, and family medicine)
Consultations available in
Korean · English · Simplified Chinese · Traditional Chinese · Japanese
* GU Clinic also operates an Ilsan location
Care is led by Dr. Ki-beom Park, Chief Medical Director.
B.S. in Biotechnology, College of Engineering, Yonsei University
M.D., Yonsei University College of Medicine
* Adjunct Professor, Graduate School of Integrative Medicine, CHA University
* Co-founder of Gangnam Unni, a medical aesthetics information platform
* Founder and CEO of Healing Breeze, a medical service organization (MSO)
* Developer of GENABELLE, a K-derma cosmetics brand
* Developer of CELLORA of GU







