The goal of this observational, cross-sectional, prospective study is to compare the quality of the image obtained on the upper abdomen organs with a low-field 0.4 T MRI system with the one obtained with a high-field 1.5 T MRI system, taken as a comparator and reference device.

The study is conducted on 40 consecutive adults, not vulnerable, patients who are already scheduled for diagnostic imaging examinations on the upper abdominal organs with the reference device.

The Primary endpoint of the study is to :

a) compare the image quality of the upper abdominal organs obtained with 0.4 T systems and with 1.5 T systems; This will be assessed via a noninferiority study on image quality. The image quality will be assessed by two experienced radiologists (more than 5 years' experience) and a trainee radiologist (at least 2 years) via blinded independent readings of the diagnostic images acquired both on the low-field 0.4T MRI device and on reference device e.g. the high-end 1.5T MRI device

Secondary endpoints of this study are:

1. evaluate the accuracy of representation and measurement (diameters, volumes) of the gallbladder and bile and pancreatic ducts;
2. compare the exam comfort with 0.4 T systems and with 1.5 T systems by means of questionnaires on the exam comfort provided to the subjects

Inclusion Criteria:

• all subjects (in-patients or out-patients) who go to the diagnostic clinical center with the indication of performing an upper abdomen MRI examination with MRI 1.5T
• age :18 years old or higher
• the subject must be capable and willing to fulfill all study requirements

Exclusion Criteria:

• pregnancy,
• poor cooperation
• claustrophobia (only for 1.5T MRI)

in-patients or out-patients, who go to the diagnostic clinical center with the indication of performing an upper abdomen MRI examination with MRI 1.5T

There's no plan to make individual partecipant data (IPD) available to other researches