Медицинская литература. Новинки

 

 

 

 

 

 

Роль градиент-эхо импульсной последовательности в оценке внутренних нарушений височно-нижнечелюстного сустава при магнитно-резонансной томографии

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Литература:

A Meaning of Pulse Sequences of the Gradient Echo for Evaluation of Intrinsic Disturbances of a Temporomandibular Joint at Magnetic Resonance Imaging

The aim of our research was a definition of the role gradient echo pulse sequences (GRE) in an evaluation of intrinsic relations of temporomandibular joint (TMJ). We examined 102 joints in 51 patients with intrinsic disturbances in temporomandibular joints. In images obtained with a use of gradient echo and spin echo (SE) pulse sequences with closed and open mouth, we defined a position of an articulate disk in relation to a condyle head of a mandible and to a surface of an articulate tubercle. A presence of an exudate and anomaly of an articular cartilage was also noticed. Sensitivity and specificity of GRE pulse sequence for an evaluation of anterolateral and anteromedial shifts of an articular disk made 100%, whereas at SE pulse sequence it came to 80% for anterolateral and to 72% for anteromedial shift. GRE pulse sequences were able to reveal more osseous and cartilaginous lesions (67%) while using SE pulse sequences these changes were found only in 35,7% of cases. Besides relying upon GRE pulse sequence it was possible to visualize a cortical plate lesions in 27%, whereas the ability of SE pulse sequence in revealing that didn't exceed 4,9 %. The data testify that images, obtained in sagittal and coronal planes with GRE and SE pulse sequences are comparable with each other for an evaluation of an articular disk's shifts. At the same time SE pulse sequences were poor for a detection of osseous and cartilaginous abnormalities, disk's dystrophia and pathological contents in disk spaces.

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