Keywords:
Technical aspects, MR-Diffusion/Perfusion, MR, Abdomen, Image verification
Authors:
D. Cavalli1, S. Tambalo2, G. Todesco1, N. Cardobi3, R. Pozzi-Mucelli1; 1VERONA/IT, 2Rovereto/IT, 3Peschiera del Garda /IT
DOI:
10.1594/ecr2018/C-2763
Methods and materials
The study population consists in 10 healthy volunteers (6 males and 4 females,
mean age 25±3 years).
All of them were scanned in 1,5 T Magnetic Resonance,
using phased array coils (32 channels in total).
The volunteers have been acquired with three triggered SE DW EPI [2],
each one with the same parameters and six different b values (0,
50,
400,
800,
1000,
1500 s/mm2),
using three different fat suppression methods: Inversion Recovery (IR),
Spectral Pre-saturation with Inversion Recovery (SPIR) and Spectral Attenuated Inversion Recovery (SPAIR) (Fig.1).
For every sequence,
the ADC maps were reconstructed and then analysed with ImageJ software (version 1.51j8).
Using the ROI Manager tool,
six Region of Interest (ROI) have been drawn: two in the liver parenchyma,
one in the pancreas,
one in the spleen,
one in the gallbladder and one in the kidneys.
This process was repeated three times by two different operators,
in order to reduce operator-related bias.
Mean intensity value was calculated and reported together with the Standard Deviation.
Therefore,
all datas had been collected together,
grouped by fat saturation method and ROI position.
For each ROI position,
the mean intensity value was calculated considering all the volunteers and it had been reported with the Standard Error of the Mean (SEM).The obtained values had been compared to the ones reported by Maysam and colleagues’ [3],
chosen as reference.
Finally,
an ANalysis Of VAriance (ANOVA) was performed.