Spetzler titanium aneurysm clips: compatibility at MR imaging.

Abstract

To evaluate the compatibility of a commercially pure titanium aneurysm clip associated with magnetic resonance (MR) imaging at 1.5 T. Artifacts of the Spetzler titanium aneurysm clip were compared with those produced by six different nonferromagnetic aneurysm clips. With the titanium clip, no magnetic attraction was present, heating was minor, and the artifacts involved a small signal void. With the six other aneurysm clips, artifacts were larger. The presence of Spetzler titanium aneurysm clips is safe at MR imaging at 1.5 T or less.

In Vitro Evaluation of MR Imaging Issues at 3T for Aneurysm Clips Made from MP35N: Findings and Information Applied to 155 Additional Aneurysm Clips

“…This test was performed by MR imaging with each aneurysm clip attached to a plastic frame and then placed in a gadolinium-doped saline-filled plastic phantom. 13,[20][21][22]25 MR imaging was conducted by using a 3T…”

“…[8][9][10]13,15,28,29 Therefore, the associated artifacts may affect the diagnostic use of the MR imaging examination if the area of interest is the same as or close to that in the proximity of the aneurysm clip made from MP35N. Optimization of pulse-sequence parameters to minimize artifacts size is, thus, recommended.…”

“…1,2 While the presence of a ferromagnetic aneurysm clip in an individual is a strict contraindication for an MR imaging procedure, [3][4][5][6][7][8] aneurysm clips classified as "nonferromagnetic" or "weakly ferromagnetic" cause no known MR imagingϪrelated problems. [5][6][7][8][9][10][11][12][13][14][15][16][17] The clinical use of 3T MR systems continues to grow, with certain advantages reported at 3T compared with lower field strength scanners. 18 Biomedical implants pose possible risks and other concerns for patients referred for 3T MR imaging examinations, which include movement or displacement of the device, excessive heating of the object, and substantial artifacts, which may impact the diagnostic use of MR imaging.…”

Rivet-like titanium clamp fixation of cranial bone flaps during open magnetic resonance-guided neurosurgery

“…The predominant safety concern is that the implant may not be moved. 17,[23][24][25][26][27] Movement of metallic implants is the result of a translational force, which is proportional to the strength of the magnetic field, and a torque force, which attemps to align or rotate the object parallel to the static magnetic field. 23,28,29 Translational force causes the highest potential risk to a patient and occurs at the position in the MRI system where the inhomogeneous magnetic fields are the greatest, close to the entrance and at the exit of the magnets bore.…”

Magnetic susceptibility artifacts by titanium surgical clips mimicking fibromuscular dysplasia of the renal artery in a kidney transplant

“…Furthermore, the type and size of the surgical implant determine the size of the artifact seen on the MR images. In the case of surgical clips, it is known that a reduction in MR artifacts can be achieved by using titanium alloys [1,2]. Two main physical effects are basically considered to cause artifacts induced by surgical clips.…”