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1.	Lagerstrand, Kerstin M, et al. (författare) Reliable phase-contrast flow volume magnetic resonance measurements are feasible without adjustment of the velocity encoding parameter 2020 Ingår i: Journal of Medical Imaging. - 2329-4310 .- 2329-4302. ; 7:6 Tidskriftsartikel (refereegranskat)abstract Purpose: To show that adjustment of velocity encoding (VENC) for phase-contrast (PC) flow volume measurements is not necessary in modern MR scanners with effective background velocity offset corrections. Approach: The independence on VENC was demonstrated theoretically, but also experimentally on dedicated phantoms and on patients with chronic aortic regurgitation (n = 17) and one healthy volunteer. All PC measurements were performed using a modern MR scanner, where the pre-emphasis circuit but also a subsequent post-processing filter were used for effective correction of background velocity offset errors. Results: The VENC level strongly affected the velocity noise level in the PC images and, hence, the estimated peak flow velocity. However, neither the regurgitant blood flow volume nor the mean flow velocity displayed any clinically relevant dependency on the VENC level. Also, the background velocity offset was shown to be close to zero (

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