Application of real-time shear wave elastography in the assessment of torsional cervical dystonia

Cervical dystonia (CD) is the most common type of focal dystonia and characterized by abnormal head and neck movement and abnormal posture due to intermittent or persistent involuntary contraction of neck muscles, causing a significant physical and psychological burden or even loss of working ability (1). Botulinum toxin type A is still the treatment of choice for CD (2). In the anti-dystonia treatment, objective and accurate assessment of muscular tension and monitoring of muscular function is crucial for the treatment, efficacy assessment and guidance for further treatment