Introduction
Material and methods
The survey
1. Do you (as a representative of your center) agree that ultrasound (US) is the preferred imaging modality for definition of anatomy and to plan liver transplant surgery in children? | |
yes/no | |
2. Do you perform abdominal computed tomography (CT) imaging in children in preparation of liver transplantation? | |
no/yes, in all patients/yes, in selected patients: In children <1 year, in children <6 years, in children not requiring sedation, in children with prior abdominal surgery (e.g., Kasai), in children with abnormalities on US, other: (free text) | |
3. If yes, please specify your main indications for CT in pre-transplant evaluation: | |
vascular anatomy/vascular patency/organ sizes/tissue and lesion characterization/other (free text) | |
4. If yes, please specify the usual CT scan area: | |
upper abdomen (liver)/complete abdomen | |
5. If yes, please specify the CT phases you perform: | |
native (no contrast)/arterial phase/parenchymal phase/late phase | |
6. Do you perform abdominal magnetic resonance imaging (MRI) in children in preparation of liver transplantation? | |
no/yes, in all patients/yes, in selected patients: In children <1 year, in children <6 years, in children not requiring sedation, in children with prior abdominal surgery (e.g., Kasai), in children with abnormalities on US, other: (free text) | |
7. If yes, please check your main indications for MRI in pre-transplant evaluation: | |
anatomy/vascular patency and flow/organ sizes/tissue and lesion characterization/other: (free text) | |
8. If yes. Which MR vascular imaging technique do you use? | |
Contrast-enhanced MR-Angiography (CE-MRA): 2-D/3-D/time resolved (4-D, temporal resolution below 5 seconds); Noncontrast MR-Angiography (NCE-MRA): Time of flight (TOF)/balanced steady state free precession (bSSFP: True FISP, Fiesta, b-FFE, B-Trance)/arterial spin labeling (ASL)/phase contrast angiography (PCA)/4-D Flow/other: (free text) |