Headache frequency and neck pain are associated with trapezius muscle T2 in tension-type headache among young adults

Table 1 Imaging protocol

Sequence description	T2‐prepared three-dimensional (3D) turbo spin-echo (TSE)
Fat suppression	Spectral inversion recovery
Repetition time	1500 ms
Echo time	16 ms
Field of view (FOV)	480 × 200 × 84 mm³
Acquisition voxel	1.75 × 1.75 × 2.0 mm³
Reconstruction voxel	1.5 × 1.5 × 2.0 mm³
Echo train length	55
Echo spacing	2.3 ms
Compressed sensitivity encoding	SENSE, reduction factor R = 5.5
Partial Fourier	None
T2 preparation	15 – 30 – 45 ms
Acquisition time	7 min 53 s

This table shows the pulse sequence parameters for 3-Tesla magnetic resonance imaging (MRI) of the neck and shoulder region. The same MRI machine and sequence was used in subjects with tension-type headache (TTH-), TTH plus migraine episodes (TTH+), and healthy controls (HC). The images at the different T2 preparations were reconstructed online using the reconstruction software of the scanner combining SENSE and compressed sensing. An additional saturation preparation scan was acquired to limit errors due to B0 inhomogeneities [17]. The flip angle train was chosen according to the vendor's routines, establishing a constant signal over the entire shot for the relaxation properties of skeletal musculature [17,18,19]

ISSN: 1129-2377