Magnetic resonance (MR) enterography has the potential to safely and noninvasively meet the imaging needs of patients with bowel diseases without exposing them to ionizing radiation. MR Enterography can provide high resolution dynamic images of bowel motility without exposing the patient to radiation.
Patient preparation
Bowel prep day before – low residue diet, fluids, laxative.
Overnight fasting or NPO 4-6 hrs prior to study
Technical preparations
All adults and kids should get 3 bottles of oral contrast (VoLumen (low-conc barium (0.1% weight/volume) that contains sorbitol) - each bottle is 450 ml.
The patient receives an IV antispasmodic to stop bowel motion.
Prone position preferred to spread and better visualize the bowel loops.
Spasmolytics are useful for reducing bowel peristalsis and motion artifacts. Reduction of peristalsis is most important for fast gradient-echo sequences performed after the administration of intravenous contrast material and also may help reduce intraluminal flow artifacts on half-Fourier acquisition single-shot turbo spin-echo images.
MR Enterography Sequences
POST CONTRAST
Optional:eDWI coronal with 1400 b-value,demonstrating Crohn’s disease,Lymphadenopathy
ADC mapping will be useful to assess ADC marking Malpighi cell proliferation, thus we can identify the surge of infl ammatory Crohn’s disease.Also LAVA images fused with ADC maps is possible.
SSFSE-Single shot fast spin echo, FIESTA-fast imaging employing steady state precession,LAVA-Liver Acquisition with Volume Acquisition(3 dimensional spoiled gradient echo pulse sequence)
Patient preparation
Bowel prep day before – low residue diet, fluids, laxative.
Overnight fasting or NPO 4-6 hrs prior to study
Technical preparations
All adults and kids should get 3 bottles of oral contrast (VoLumen (low-conc barium (0.1% weight/volume) that contains sorbitol) - each bottle is 450 ml.
The patient receives an IV antispasmodic to stop bowel motion.
Prone position preferred to spread and better visualize the bowel loops.
Spasmolytics are useful for reducing bowel peristalsis and motion artifacts. Reduction of peristalsis is most important for fast gradient-echo sequences performed after the administration of intravenous contrast material and also may help reduce intraluminal flow artifacts on half-Fourier acquisition single-shot turbo spin-echo images.
MR Enterography Sequences
- Scano
- Coronal T2 SSFSE Abdomen&Pelvis
- Axial T2 SSFSE Abdomen&Pelvis
- Coronal 2D FIESTA Abdomen&Pelvis
- Axial2D FIESTA Fat Sat Abdomen&Pelvis
- Axial LAVA BH Abdomen&Pelvis
POST CONTRAST
- COR LAVA BH MP Abdomen&Pelvis
- Axial LAVA BH Abdomen&Pelvis(90 seconds after injection and covering the entire abdomen)
- Coronal 3D-MRCP upper and lower (done for bowel, not for bile ducts)
Optional:eDWI coronal with 1400 b-value,demonstrating Crohn’s disease,Lymphadenopathy
ADC mapping will be useful to assess ADC marking Malpighi cell proliferation, thus we can identify the surge of infl ammatory Crohn’s disease.Also LAVA images fused with ADC maps is possible.
SSFSE-Single shot fast spin echo, FIESTA-fast imaging employing steady state precession,LAVA-Liver Acquisition with Volume Acquisition(3 dimensional spoiled gradient echo pulse sequence)
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