The first (and to my knowledge only fatal event) occurring in an MRI patient with a cerebral aneurysm clip occurred in Texas in 1993. The details of this case are worth reviewing, as they provide some lessons for MR safety. Fatal intracranial hemorrhage from movement of a ferromagnetic aneurys...
There is an unmet need for an automated system which can flag aneurysm clips prior to MRI appointments. We assess the accuracy with which a machine learning model can classify the presence or absence of an aneurysm clip on CT images. A total of 280 CT head scans were c...
CT scans in these patients demonstrated no evidence for hemorrhage or visible change in clip position. We documented no objective adverse outcome of patients undergoing MRI with NFAC, confirming that MRI can be performed safely in patients with nonferromagnetic aneurysm clips. The cause of subjective...
The holographic clipping simulation included a real-time finite-element-model of the aneurysm sac, allowing interaction with a virtual clip and its occlusion. Validity, usability, usefulness and applications of the simulators have been assessed through clinical scores for aneurysm occlusion and a ...
Figure 4. Aneurysms may be either (a) clipped via craniotomy with a small metal clip which closes the aneurysm neck, or (b) coiled by filling the dome with a small filament delivered through an intraarterial catheter.Reproduced with permission from Barrow Neurological Institute. Ruptured aneurysms...
21 Small aneurysmal remnants tended to occur within 2 mm around the clip, where the artifacts from titanium clips covered, which resulted in a relative lower detection ratio of 66% by postoperative CTA.22,23 The evaluation of aneurysmal remnants shows an increasing reliance on the imaging quality...
CT scans in these patients demonstrated no evidence for hemorrhage or visible change in clip position. We documented no objective adverse outcome of patients undergoing MRI with NFAC, confirming that MRI can be performed safely in patients with nonferromagnetic aneurysm clips. The cause of subjective...
CT scans in these patients demonstrated no evidence for hemorrhage or visible change in clip position. We documented no objective adverse outcome of patients undergoing MRI with NFAC, confirming that MRI can be performed safely in patients with nonferromagnetic aneurysm clips. The cause of subjective...
Conclusion Safe scanning conditions with respect to RF‐induced heating can be applied depending on the information about the clip gained during screening interviews. However, force and torque measurements in the MR system shall be conducted to give a final statement on the MR safety of aneurysm ...
For 15 of 60 scenarios with the 51.5‐mm‐long clip, limits were slightly exceeded (less than 1°C). The conservative approach led to a maximum time‐averaged input power of the RF coil of 3.3W. The corresponding B 1 + is 1.32 μT. A decoupling distance of 35 mm allows the aneurysm...