Required temporal resolution for accurate thoracic aortic pulse wave velocity measurements by phase-contrast magnetic resonance imaging and comparison with clinical standard applanation tonometry

Table 2 The PWV median errors for different number of time frames/temporal resolution based on 210 computer phantoms

Time frames	Temporal resolution [ms]	Median error [m/s]	Median error [%]
20	50.0	2.36	21.3
21	47.6	1.51	17.2
22	45.5	0.72	10.4
23	43.5	0.16	9.1
24	41.7	-0.02	6.5
25	40.0	-0.39	4.4
26	38.5	-1.61	10.8
27	37.0	-2.74	18.1
28	35.7	-2.39	21.3
29	34.5	-1.83	16.2
30	33.3	-1.29	11.4
31	32.3	-0.76	6.7
32	31.3	-0.42	5.1
33	30.3	-0.20	2.6
34	29.4	-0.11	1.3
35	28.6	0.10	0.9
36	27.8	0.48	3.6
37	27.0	0.46	4.1
38	26.3	0.30	3.0
39	25.6	0.23	2.4
40	25.0	0.17	1.8

Errors are expressed as median errors for all velocities in the range of 2–20 m/s

ISSN: 1471-2261