Open high-field MRI
Depending on manufacturer, various open MRI systems have been developed. In the construction of such systems substantial technical and physical hurdles have to be overcome. Previous open MR systems typically functioned on the basis of permanent magnets with relatively low field strength. For some part, even resistive magnets haven used in low field environments. Since recently, so called open high-field MR systems are available. The advantages of such systems are not only the increased space and improved accessibility to the patient, but also image quality not withstanding that of conventional tunnel systems.
Ambient Experience
Going to the hospital is not something people look forward to – it’s a time when they may feel frightened and vulnerable. Research has shown that hospital design can be crucial in creating a more reassuring environment, improving the way patients feel during various procedures such as MRI. Patients can feel anxious and intimidated, unsure of what will happen next and concerned about the medical condition that brought them to the hospital. Patients may not have visual contact with clinical staff during some procedures. At the same time, they may be separated from family and loved ones, resulting in feelings of isolation. An individual may feel like “another number” with no control over what’s happening. Hospital procedures can be time consuming and staffing shortages can contribute to long wait times, ensuing in stress for hospital staff and patients alike.
With a combination of light, animation and spatial design, a soothing and comfortable environment is created that can help distract and empower patients. With “Ambient Experience” patients can choose their personal ambience light settings before the scanning procedure.
Patient Comfort
In the open MRI the patient has three times more space, than in a conventional tunnel system MRI. This allows a more pleasant exam for the patient and especially claustrophobic and obese patients find the open MR environment more likable. The examination of children with a patient or close relative in direct contact is also facilitated. Studies show that patients prefer exams conducted in an open MRI.
Interventions in the open HF MRI
MRI, with its excellent soft tissue contrast, has played an important role in the evolution of modern surgical medicine.
Successful interventions under MR-guidance have two requirements. One, the physician has to have adequate access to the patient. And two, fast and qualitative imaging has to be possible during the intervention. Functional assessment in the open HF MRI has similar prerequisites. However, for surgery under MR guidance, further requirements have to be met.
Since many interventional instruments have magnetic properties, they can not be used in an MRI. Therefore, MR-compatible surgical instruments have to be developed. This is the main objective of our research group. Especially instruments for minimally invasive interventions, which were performed under conventional fluoroscopy up until now, are addressed.
With the possibility of choosing any image plane and the open construction of the MRI and the exam conduct with fast imaging sequences, we now have the opportunity to assess the outcome of intervention, directly after MR-guided surgery. Thus, immediate corrections or amendments to the intervention can be performed, if necessary.
Felix Güttler
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