24/08/2026
๐๐ข๐ก๐ ๐๐๐๐ข๐ก๐๐ฆ ๐ข๐ก ๐ง๐๐ ๐ง๐ฅ๐๐๐ง๐ ๐๐ก๐ง ๐ ๐๐ฃ
On the mid-forehead, MRI measurements put roughly 5 mm between the skin surface and the outer cortex of the frontal bone. Several facial depth options reach further than that.
๐๐ผ๐ป๐ฒ ๐ถ๐ ๐ฎ๐ป ๐ฎ๐ฐ๐ผ๐๐๐๐ถ๐ฐ ๐ฏ๐ผ๐๐ป๐ฑ๐ฎ๐ฟ๐, ๐ป๐ผ๐ ๐ฎ ๐ฏ๐ฎ๐ฐ๐ธ๐ฑ๐ฟ๐ผ๐ฝ
Soft tissue and cortical bone sit far apart acoustically โ published measurements cite about 1.62 MRayl for soft tissue against 6.27 MRayl for cortical bone (Pham et al., Proc Inst Mech Eng H 2022;236(9):1403โ1413). At that mismatch, a substantial part of the incident energy does not continue into bone: some is absorbed right at the surface, some is reflected back into the tissue just above it. Therapeutic ultrasound literature, working at far higher intensities, names the consequence plainly โ the periosteum, the most innervated structure of mature bone, is heated by that absorbed and reflected energy (Scipione et al., Semin Intervent Radiol 2018;35(4):261โ267).
๐๐ผ๐ ๐บ๐๐ฐ๐ต ๐ฟ๐ผ๐ผ๐บ ๐๐ต๐ฒ ๐ฎ๐ป๐ฎ๐๐ผ๐บ๐ ๐ฎ๐ฐ๐๐๐ฎ๐น๐น๐ ๐ด๐ถ๐๐ฒ๐ ๐๐ผ๐
An MRI study of 160 adults measured forehead soft tissue from skin to the external cortical lamina: about 5.7 mm midline in men and 5.3 mm in women, 7.4 and 6.8 mm laterally, with thinning after the fifth decade (Cakmakoglu et al., Aesthetic Plast Surg 2025;49(19):5275โ5283). The depth budget is regional and individual, not universal.
๐ช๐ต๐ ๐ถ๐ ๐๐๐ฟ๐ณ๐ฎ๐ฐ๐ฒ๐ ๐ฎ๐ ๐ฑ๐ถ๐๐ฐ๐ผ๐บ๐ณ๐ผ๐ฟ๐ ๐ณ๐ถ๐ฟ๐๐
Published data on the technology report higher discomfort over submental and submandibular areas than over the cheek, with proximity to underlying bone the usual explanation. Regional differences are a mapping signal, not a patient-tolerance signal.
๐ช๐ต๐ฒ๐ฟ๐ฒ ๐ก๐ฒ๐ ๐๐ผ๐๐ฏ๐น๐ผ ๐ฎ.๐ฌ ๐ณ๐ถ๐๐
Officially stated: depth is a hardware choice โ 20 cartridge types across 1.5โ9.0 mm, LINE and DOT modes, up to 4 handpieces connected at once, and patented contact and movement sensors that stop cartridge operation when contact is lost or the handpiece stalls in one spot.
๐ข๐ป๐ฒ ๐พ๐๐ฒ๐๐๐ถ๐ผ๐ป ๐ฏ๐ฒ๐ณ๐ผ๐ฟ๐ฒ ๐๐ต๐ฒ ๐๐ผ๐ป๐ฒ
How many millimetres of soft tissue sit above bone here โ and does the cartridge range let you stay inside them?
#๋ธ์ด๋ก๋ฆฌํํ