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Table 2 MRI protocol. Synoptic table summarizes the imaging parameters of MR sequences. Axial T2-weighted SSFSE sequence is used as second localiser to identify the longitudinal axis of the uterus. Sagittal T2-weighted FRFSE sequence is oriented parallel to the longitudinal axis of the uterus identified on the previous axial T2-weighted SSFSE sequence. Oblique coronal and oblique axial T2-weighted FRFSE sequences are oriented respectively parallel or perpendicular to the longitudinal axis of the uterus

From: Endometriosis: clinical features, MR imaging findings and pathologic correlation

MRI protocol Axial T2 W SSFSE Sagittal T2 W FRFSE Oblique coronal/axial T2 W FRFSE Axial T2* Axial DWI SE EPI Sagittal, oblique coronal/axial T1 W 3D GRE LAVA
Repetition time/Echo time (ms) 765/59 4675/100 4675/100 650/11.8 3000/74.1 4.4/2.1
Flip angle 90° 90° 90° 20° 90° 12°
Section thickness (mm) 6 4 4 5 5 3.4
Interslice gap (mm) 0.6 0.4 0.4 0 1 −1.7
Bandwidht (kHz) 31.25 41.67 41.67 8.33 250 62.5
Field of view (cm) 38 32 32 25 46 40
Matrix 320 × 288 320 × 224 320 × 224 256 × 256 160 × 160 320 × 192
N. of averages 0.54 4 4 1 16 0.75
N. of images 30 26 26 30 28 104
Frequency direction Right to left Anterior to posterior Right to left Anterior to posterior Anterior to posterior Superior to inferior
Acquisition time 24 s 3 min 49 s 3 min 49 s 1 min 28 s 3 min 18 s 22 s
b-value (s/mm2) 0–800
  1. Sagittal, oblique coronal and oblique axial T1-weighted 3D gradient-echo liver acquisition with volume acceleration (LAVA) sequences with fat suppression are acquired before and after intravenous administration of paramagnetic contrast agent (0.1 mmol/kg at a flow rate of 2 mL/s, followed by 20 mL of saline solution at the same flow rate); in particular, the sagittal sequence is acquired at 60 and 120 s after contrast administration. About 10 min after contrast administration, T1-weighted 3D gradient-echo LAVA sequences are acquired in the sagittal, coronal and axial planes, to obtain an urographic phase
  2. T2-weighted FRFSE, T2* and DW sequences are acquired with patient breathing freely, T1-weighted 3D gradient-echo LAVA sequences are acquired in breath hold. T2* and DW sequences are not routinely performed and represents optional sequences
  3. T2 W T2-weighted, T1 W T1-weighted, SSFSE single-shot fast spin-echo, FRFSE fast relaxation fast spin-echo, DWI diffusion-weighted imaging, SE spin-echo, EPI echoplanar imaging, GRE gradient-echo, LAVA liver acquisition with volume acceleration