NON UNIFORMITY FAT SUPPRESSED IMAGES

MRINAWAS · Joined: 30 Nov 2009 Posts: 5

Dear MR Experts

An one and half years old, female patient was diagnosed as Congenital lymphadenoma and referred as MRI for Both lower limbs.(Right side lower limb was thickened than left clinically)

SIEMENS, MAGNETOM SYMPHONY 1.5 T

Yesterday, i perform this study, under oral sedation with PA coil plus body coil are used with patient supine, head first position. All acquired images are good SNR except the non uniformity fat suppressed images of T2 PD fat suppression either in coronal and transverse plane. Those T2 PD fat suppressed images shows superior images (above center of the images) are nicely fat suppressed whereas the inferior (below center of the images) are not fat suppressed.

what's the cause for this artifact and how should i overcome these artifacts in future.Any remedies from experts please....

Although i repeated the scan with Manual shimming, changed to Fat suppression mode to Strong/weak, RF type as Normal....,increased TR ..........
This patient was performing under sedation,so i don't want to try other ways,,,,
Note: S1 to S6 phased array coils are activated during study but i perform with T1 TIRM shows uniform suppression

hope for the solution

NAWAZ[/img]