Jpn J Radiol DOI 10.1007/s11604-015-0416-3

ORIGINAL ARTICLE

Application of ultrasound elastography for determining carpal tunnel syndrome severity Mahsa Ghajarzadeh1 · Mehrdad Dadgostar2 · Payam Sarraf3 · Seyede Zahra Emami‑Razavi1 · Shahin Miri4 · Mahrooz Malek5 

Received: 23 August 2014 / Accepted: 19 March 2015 © Japan Radiological Society 2015

Abstract  Objective  To evaluate grey-scale and elastography ultrasound imaging findings in patients with CTS compared to nerve conductive studies. Method  Sixty median nerves of 31 cases with confirmed CTS and 44 median nerves in 22 controls (healthy volunteers) who had no clinical evidence of CTS were evaluated. An expert radiologist performed all US evaluations. The RGB image is a three-dimensional matrix. A colour image RGB is an M × N × 3 array of colour pixels. The total pixels, total blue and red pixels, and blue and red indexes were compared between cases and controls. Results  Of the 60 nerves in the cases, 17 (16.3 %) were mildly affected, 30 (28.8 %) were moderately affected, and 13 (12.5 %) were severely affected. Mean CSA, total blue pixels and blue indexes were significantly different between controls and cases with different levels of disease severity. The best cut-off point in the blue index to differentiate patients from controls was 0.1486, with a sensitivity

* Mahrooz Malek [email protected] 1

Brain and Spinal Injury Research Center (BASIR), Tehran University of Medical Sciences, Tehran, Iran

2

Department of Electrical Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran

3

Department of Neurology, Iranian Center of Neurological Research, Imam Khomeini Hospital, Tehran University of Medical Sciences, Tehran, Iran

4

Tehran University of Medical Sciences, Tehran, Iran

5

Department of Radiology, Medical Imaging Center, Advanced Diagnostic and Interventional Radiology Research Center (ADIR), Imam Khomeini Hospital, Tehran University of Medical Sciences (TUMS), Tehran, Iran





and specificity of 80 and 70 % (AUC = 0.79, P 

Application of ultrasound elastography for determining carpal tunnel syndrome severity.

To evaluate grey-scale and elastography ultrasound imaging findings in patients with CTS compared to nerve conductive studies...
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