Diffusion-Weighted Imaging Combined with Perfusion-Weighted Imaging under Segmentation Algorithm in the Diagnosis of Melanoma

Table 1

Scanning parameters for the head and spine MRI.

Position	Scanning items	Scanning parameters	Sequence
Head	T1WI	Time of repetition (TR): 2000 ms, time of echo (TE): 9 ms
	T2WI	TR: 3000 ms, TE: 98 ms
	Water suppression	TR: 7000 ms, TE: 93 ms; Time of inversion (TI): 2500 ms	Fluid attenuated inversion recovery (FLAIR)
	DWI	TR: 5000 ms, TE: 90 ms
	PWI	TR: 1500 ms, TE: 60 ms; Slice thickness: 5 mm
Spinal canal	T1WI	TR: 420 ms, TE: 9 ms
	T2WI	TR: 3000 ms, TE: 113 ms
	Fat suppression	TR: 330 ms, TE: 41 ms	Turbo inversion recovery magnitude (TIRM)
		TI: 220 ms
		Slice thickness: 3 mm