Magnetic resonance imaging (MRI) is a modern imaging process used for the creation of sectional views of the interior of the body at various levels. This procedure takes place at our Location 2, Bahnhofstrasse 7.
Nuclear magnetic resonance imaging (NMRI)
Magnetic resonance tomography (MRT)
The advantage of MR is the lack of ionizing radiation such as X-rays. MRI essentially leverages the intrinsic spinning of hydrogen protons, which enable the imaging when subjected to a targeted magnetic field. The pro-cess also takes advantage of the fact that the various tissues in the human body contain different quantities of hydrogen protons. In particular, MRI produces considerably better images of the body’s soft tissue structures than computed tomography (CT).
The generation of MR images takes longer, however – between 15 and 45 minutes. This is due to the number of sequences and procedures involved in producing the images.
Prior to the MRI scan, patients receive an information sheet and questionnaire. This ensures that we are aware of any particular risks before we proceed. Before the scan, you are required to remove metallic or magnetic items from your person, such as keys, bank cards, jewellery and watches. You are then placed in the scanner with the part of the body being imaged lying at the centre of the magnet, which is at the absolute centre of the tunnel. The latter remains open, ventilated and lit throughout the scan. An intercom allows you to speak to the technicians at any time. They can also see you thanks to a camera incorporated into the scanner. Good quality images depend on you keeping very still during the scan. The process produces a repetitive knocking noise. For patients who prefer not to hear this we can provide ear protectors or headphones with music. As a general rule, no special preparation is needed for the scan. You may eat and drink prior to the procedure. By way of exception, the examination of inflammatory bowel diseases using the Sellink method calls for a special preparation of the bowel. Patients are asked to observe the instructions of their doctor. Patients with pacemakers (with the limited exception of MR-compatible pacemakers, subject to prior consultation with cardiologists), internal ear prostheses (cochlear implants) and nerve stimulators cannot be scanned, since the strong magnetic fields involved could interfere with the implants. MRI does not present a problem for patients with an artificial heart valve, provided it is a biological valve. If you have been fitted with an artificial heart valve, please bring documentary evidence of the type of valve to the scanning session. MRI scanning does not present a problem for artificial joints, vascular prostheses (stents) or amalgam tooth fillings. Patients who have been operated on up to six weeks prior to the scan should consult their doctor. If you have any doubts, do please talk to our staff.