RESUMO
Objective To observe value of high frequency ultrasound for inspection of T7-8 paravertebral space and adjacent structures.Methods Color Doppler ultrasonic diagnostic apparatus with linear array transducer (frequency 3-12 MHz) were used.Taking shoulder blade,ribs,thoracic spine and transverse process as anatomical marks,T7-8 paravertebral spaces of 30 normal adult (a total of 60 side) were examined.Ultrasonographic features of T7-8 paravertebral space and the adjacent structures were observed.Results T7-8 thoracic paravertebral showed as similar triangular shape with ultrasonography,interior solid homogeneously hypoechoic was noticed.Adjacent muscles of T7-8 paravertebral space included the trapezius,latissimus dorsi,spinalis,semispinalis,multifidus,rotatores and intercostal muscles.Color Doppler or power Doppler flow imaging could demonstrate posterior intercostal artery in the paravertebral space.Conclusion High frequency ultrasound can clearly show T7-8 paravertebral space and adjacent structures,thus providing ultrasonic references for clinical diagnosis and treatment of lesions of thoracic space and adjacent structures.
RESUMO
ObjectiveTo evaluate the diagnostic value of high-frequency ultrasonography for dorsal wrist cyst.MethodsThe ultrasonographic characteristics of 136 dorsal wrist cysts were retrospectively studied and compared with the pathological results, the locations and the imaging characteristics of the cysts were analysed, hence to conclude the diagnostic value of high-frequency ultrasonography.ResultsBased on the anatomical location diagnosed by high frequency ultrasound, the 136 dorsal cysts were divided into three types: extensor retinaculum cysts, synovial tendon sheath cysts and dorsal interosseous ligament cysts, each accounted for 1.5% (2/136), 24.3% (33/136) and 74.2% (101/136) of the study group. The most frequently detected locations for dorsal cysts were dorsal scapholunate ligament,tendinous sheath of extensor digitorum and extensor indicis, as well as tendinous sheath of extensor carpi radialis longus and brevis,each accounted for 60.3% (82/136), 8.1% (11/136) and 6.6% (9/136) of all dorsal wrist cysts respectively. Dorsal wrist cysts had typical ultrasonographic features on 2-D gray-scale ultrasonography, the extensor retinaculum cyst demonstrated as a well-marginated, small-sized and oval anechoic area, which was commonly located in the oedematous extensor retinaculum, but it had no adjunction with the extensor tendon, and it was accompanied with dorsal scapholunate ligment cyst frequently. Synovial tendon sheath cyst demonstrated as a oval or eggplant-shaped anechoic area which was usually winding around the extensor tendon, but it had no adjunction with the dorsal interosseous ligament and the extensor retinaculum. Meanwhile, the dorsal interosseous ligament appeared to be normal strip-like echo texture with a smooth and clear margin. Dorsal interosseous ligament cyst demonstrated as a out-of-shape anechoic area and located superior to the injured ligament. Meanwhile, the impaired ligament was thickened with uneven margin and decreased echo texture. No blood lfow signals was detected in all dorsal wrist cysts by color doppler lfow imaging.ConclusionHigh-frequency ultrasonography can be used to diagnosis dorsal wrist cysts, and can be served as the preferred imaging modelity to guide the clinical treatment.