Table 4 –

MRI Studies by Imaging Technique

Conventional MRI (N = 2)
Author	Population	Total No. of participants No. of sites/images Males : Females	Use of Control Groups	Use of Travell and Simons’ criteria	MTrP property measured
Luiza da Silva Queiroz et al. 2020	Female migraine patients (ICHD-3), aged 18–30	N = 14 Not reported All female	Six controls without migraine	Yes	T1signal intensity at and around MTrPs with and without gadolinium contrast
Sollmann et al. 2019	Migraine patients (ICHD-3) with clinically confirmed MTrPs in the upper trapezius muscles	N = 10 N = 38 images 1:9	No control group of participants, adjacent muscle tissue used for comparison	Not reported	T2 mapping with prepared TSE sequence
Magnetic Resonance Elastography (N = 2)
Author	Population	Total No. of participants No. of sites/images Males : Females	Use of Control Groups	Use of Travell and Simons’ criteria	MTrP property measured
Chen et al. 2008	Women with and without myofascial pain	N = 8 Not reported All female	Four healthy controls recruited, no mention of age matching	Not reported	Shear stiffness in taut bands, in adjacent muscle and in controls
Chen et al. 2016	Participants with myofascial pain in trapezius muscles aged 21–70 years	N = 65 N = 140 MRE scans 20:45	No control group of participants, adjacent or contralateral muscle tissue used for comparison	Not reported	Stiffness and stiffness ratio of taut bands and adjacent muscle, intra- and inter-rater reliability, comparison of MRE with clinical detection of taut bands