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Artefacts phantoms

EXORCYCLE Phase cycle to suppress ghost and phantom artefacts in spin-echo sequences 7.2.2... [Pg.373]

Contour plot of the J(C, H) resolved spectrum of bromomethane using a minimum phase cycling and incorrectly set 180° (IH, l C) pulses (G = ghost peaks, P = phantom peaks and U = unnamed artefacts). [Pg.230]

Fig. 6.1a,b. Colonic phantom containing three different simulated lesions 9.6-mm and 5.5-mm sessile polyps and 8-mm flat lesion. Using a a thick collimation protocol lesions sharpness is definitely reduced compared with b a thin collimation protocol. Note edge blurring (arrow) directly related to the increase of effective slice thickness as well as geometric distortion. This artefact particularly affects simulated flat lesion (arrowhead)... [Pg.63]

Fig. 6.4. Example of rippling artefacts induced by high pitch value. The small sessile polyp in a simulated colonic phantom (arrow) is barely seen... Fig. 6.4. Example of rippling artefacts induced by high pitch value. The small sessile polyp in a simulated colonic phantom (arrow) is barely seen...
See other pages where Artefacts phantoms is mentioned: [Pg.95]    [Pg.48]    [Pg.230]    [Pg.48]    [Pg.10]    [Pg.65]    [Pg.144]    [Pg.146]   
See also in sourсe #XX -- [ Pg.266 ]

See also in sourсe #XX -- [ Pg.238 ]



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