Macchi Veronica, Tiengo Cesare, Porzionato Andrea, Stecco Carla, Galli Sergio, Vigato Enrico, Azzena Bruno, Parenti Anna, De Caro Raffaele
Department of Human Anatomy and Physiology, Section of Anatomy, University of Padova, Italy.
Ital J Anat Embryol. 2007 Oct-Dec;112(4):247-53.
The aim of the study was to analyse the appearance of the superficial muscolo-aponeurotic system (SMAS) in radiological images (Magnetic Resonance -MR- and Computed tomography -CT- scans, 10M, 10F randomly selected) in the three regions of the face (the parotid and cheek regions and the nasolabial fold). In axial CT images, the SMAS appears as a relatively hyperdense tortuous line between the hypodense superficial fibroadipose tissue (SAT) and the hypodense deep adipose tissue (DAT). In parotid region SAT is well represented (mean thickness 4.32 +/- 2.9 mm), whereas DAT is very thin (0.33 +/- 0.48 mm); SMAS appears as a thin hyperdense line, close to the parotid gland (0.76 +/- 0.43 mm). In cheek region, SAT is well represented (5.57 +/- 1.17 mm), whereas DAT is thinner (2.94 +/- 0.62 mm), and SMAS is well recognisable (1.69 +/- 0.52 mm). At the level of the nasolabial fold, the SAT is poorly represented (0.37 +/- 0.06 mm); the SMAS continues in the mimic muscles (2.41 +/- 0.05 mm), and DAT shows a mean thickness of 2.15 +/- 0.63 mm. In the MR examination, the SMAS appears as a thin continuous line hypointense in the T1-and T2-weighted sequence, from parotid region to nasolabial fold, comprising mimic muscles in the anterior region of the cheek and at the level of the nasolabial fold. No significative differences in thickness between CT and MR were found. Our anatomo-radiological study confirms that the subcutaneous architecture of the face consists of multiple layers of tissues that connect facial muscles with the dermis. This pattern of arrangement shows a progressive centrifugal thinning towards the adjacent regions.
本研究的目的是分析放射影像（磁共振成像 -MR- 和计算机断层扫描 -CT-，随机选取10名男性和10名女性）中面部三个区域（腮腺和颊部区域以及鼻唇沟）的表浅肌肉腱膜系统（SMAS）的表现。在轴向CT图像中，SMAS表现为低密度的表浅纤维脂肪组织（SAT）和低密度的深部脂肪组织（DAT）之间相对高密度的迂曲线条。在腮腺区域，SAT表现明显（平均厚度4.32±2.9毫米），而DAT非常薄（0.33±0.48毫米）；SMAS表现为靠近腮腺的细高密度线条（0.76±0.43毫米）。在颊部区域，SAT表现明显（5.57±1.17毫米），而DAT较薄（2.94±0.62毫米），且SMAS易于辨认（1.69±0.52毫米）。在鼻唇沟水平，SAT表现不明显（0.37±0.06毫米）；SMAS延续至表情肌（2.41±0.05毫米），且DAT平均厚度为2.15±0.63毫米。在MR检查中，SMAS在T1加权和T2加权序列中表现为从腮腺区域到鼻唇沟的细连续低信号线条，包括颊部前部区域和鼻唇沟水平的表情肌。未发现CT和MR在厚度上有显著差异。我们的解剖放射学研究证实，面部的皮下结构由将面部肌肉与真皮相连的多层组织组成。这种排列模式显示出向相邻区域逐渐离心变薄。
