The significance of muscle echo intensity on ultrasound for focal neuropathy: The median- to ulnar-innervated muscle echo intensity ratio in carpal tunnel syndrome

Quantitative muscle ultrasound is useful for evaluating secondary axonal degeneration in chronic inflammatory demyelinating polyneuropathy

“…MUS findings including EI and MT in denervated hand muscles correlated with the severity of EMG abnormalities and facilitated the discrimination between moderate-to-severe muscle denervation and healthy hand muscles (Kim et al, 2016;Pillen et al, 2008;Simon et al, 2015). In this study, the quantitative MUS assessment on small hand muscles in patients with CIDP revealed that six out of 45 muscles with abnormally high EI and/or low MT suggested denervation following secondary axonal degeneration.…”

Split hand muscle echo intensity index as a reliable imaging marker for differential diagnosis of amyotrophic lateral sclerosis

“…The ROI of the ML muscle group was determined in the same manner as described in a previous study: (1) the line connecting the upper tip of the first metacarpal bone and the flexor pollicis longus tendon was the inferior border; (2) the line along the superior part of the ML muscle fascia was the superior border; (3) a vertical line passing the upper tip of the first metacarpal bone was the left border; and (4) a vertical line passing the upper tip of the flexor pollicis longus tendon was the right border 21. Cross-sectional images of the UL and UM clearly showed the hyperechoic epimysium, and the ROIs of the UL and UM muscles were determined by tracing just inside of the epimysium, respectively.…”

“…Muscle EI of the hand muscles was measured on both hands by an expert (HYS) according to the method described in a previous study21 using B-mode US equipment (HD15 System, Philips Ultrasound, Bothell, Washington, USA) with a 5–12 MHz transducer and the following equipment settings: 50 dB gain, 56 dB dynamic range and 3 cm depth. During the measurements, subjects were asked to fully relax in the supine position with their forearm in full supination.…”

Quantitative muscle ultrasound is useful for evaluating secondary axonal degeneration in chronic inflammatory demyelinating polyneuropathy

“…Several recent studies reported that the determination of EI and MT by quantitative MUS was highly accurate and reproducible in detecting hand muscle denervation (Kim, Seok, & Kim, 2016; Lee et al.,2016; Shahrizaila et al., 2017; Simon et al., 2015). MUS findings including EI and MT in denervated hand muscles correlated with the severity of EMG abnormalities and facilitated the discrimination between moderate‐to‐severe muscle denervation and healthy hand muscles (Kim et al., 2016; Pillen et al., 2008; Simon et al., 2015).…”

“…MUS findings including EI and MT in denervated hand muscles correlated with the severity of EMG abnormalities and facilitated the discrimination between moderate‐to‐severe muscle denervation and healthy hand muscles (Kim et al., 2016; Pillen et al., 2008; Simon et al., 2015). In this study, the quantitative MUS assessment on small hand muscles in patients with CIDP revealed that six out of 45 muscles with abnormally high EI and/or low MT suggested denervation following secondary axonal degeneration.…”