The estimation of instantaneous frequency (IF) method is introduced to compensate for the group velocity of electromagnetic wave in dispersive medium. The location of the reflected signal can be obtained by using the time-frequency cross correlation (TFCC), following which it is used to extract the transmitted signal from the total signal acquired. The signal propagated in the dispersive medium...

Ulnar sided wrist pain is a common site for upper extremity disability. Ulnar impaction syndrome results in a spectrum of triangular fibrocartilage complex (TFCC) injuries and associated lunate, triquetrum, and ligamentous damage. Patients commonly present with insidious ulnar sided wrist pain and clicking, and a history of trauma or repetitive axial loading and rotation. In this case series, t...

The authors retrospectively compared the diagnostic accuracy of clinical examination and magnetic resonance imaging for intra-articular wrist pathology (triangular fibrocartilage complex, lunotriquetral and scapholunate injuries), using wrist arthroscopy as the gold standard. Sixty-six patients had clinical examination and arthroscopy; 38 of them also had magnetic resonance imaging. The diagnos...

Introduction Fractures of the ulnar styloid frequently accompany fractures of the distal radius, however, there is no conclusive evidence whether it influences the final outcome of the treatment. The majority of studies show no negative effect of ulnar styloid fractures on final outcome, when the fracture of the distal radius is fixed, preferably by a locking plate [1,2]. Some authors, however,...

The fovea ulnaris is considered to be the center of rotation on ulnar head during forearm rotation. purpose this study was investigate whether truly isometric in vivo. three-dimensional reconstruction models 21 wrist computed tomography images taken supination and pronation were investigated. superimposed so that two heads same position. Numerous points set surface with a mean distance 0.2 mm b...

Giant cell tumour of the bone (GCT) is a rare locally aggressive primary bone tumour with an incidence of 3% to 5% of all primary bone tumours. The most common location for this tumour is the long bone metaepiphysis especially of the distal femur, proximal tibia, distal radius, and the proximal humerus. Involvement of distal ulna is rare accounting for 0.45% to 3.2%. Considering local aggressiv...

A 16-year-old boy presented with left wrist pain of 8 months’ duration. There was a remote history of a hyperextension injury to the wrist while weight lifting. He denied all constitutional symptoms. He had taken NSAIDs intermittently with no resolution of symptoms. He was an otherwise healthy adolescent with no significant medical history. His family history was noncontributory. The patient ha...