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 … Show more
“…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…”
Section: Artifactsmentioning
confidence: 99%
“…[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.…”
Section: Artifactsmentioning
confidence: 99%
“…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.…”
BACKGROUND AND PURPOSE:Aneurysm clips need to be tested at 3T to characterize MR imaging concerns, including magnetic field interactions, MR imagingϪrelated heating, and artifacts. Therefore, we evaluated these risks for 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…”
Section: Artifactsmentioning
confidence: 99%
“…[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.…”
Section: Artifactsmentioning
confidence: 99%
“…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.…”
BACKGROUND AND PURPOSE:Aneurysm clips need to be tested at 3T to characterize MR imaging concerns, including magnetic field interactions, MR imagingϪrelated heating, and artifacts. Therefore, we evaluated these risks for aneurysm clips.
“…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.…”
A new implant technique for bone flap fixation after magnetic resonance image-guided neurosurgical procedures in the first vertical open 0.5T MRI scanner is described. Between May 1998 and December 1998 cranial bone flap refixation was performed in 20 patients using rivet-like titanium cranial bone flap fixation clamps. In all cases, a safe and solid refixation of the bone flap was achieved. Intraoperative and postoperative MRI quality was not influenced. Rivet-like titanium clamp bone fixation is a safe procedure which can be easily performed under the special circumstances during neurosurgical operations with interventional MRI.
“…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.…”
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.