1998
DOI: 10.1148/radiology.207.3.9609911
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Cranial bone flap fixation clamps: compatibility at MR imaging.

Abstract: Metallic cranial bone flap fixation clamps were tested for compatibility at 1.5-T magnetic resonance (MR) imaging with standardized techniques. There was no magnetic field attraction, heating was minor, and artifacts involved a relatively small signal void. These data indicate that bone flap fixation clamps will not present risks to patients undergoing MR imaging procedures with MR systems of 1.5 T or less.

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Cited by 26 publications
(45 citation statements)
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“…Like mini-plates, burr-holes can be covered using larger clamps of 16 mm diameter. According to the findings of Shellock & Shellock 17 MRI of the brain will not substantially be affected by the presence of titanium bone flap clamps. On the basis of cross-sectional areas, the fast spoiled gradient sequences produced the largest artefacts, followed by T1-weighted fast SE sequences.…”
Section: Discussionmentioning
confidence: 97%
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“…Like mini-plates, burr-holes can be covered using larger clamps of 16 mm diameter. According to the findings of Shellock & Shellock 17 MRI of the brain will not substantially be affected by the presence of titanium bone flap clamps. On the basis of cross-sectional areas, the fast spoiled gradient sequences produced the largest artefacts, followed by T1-weighted fast SE sequences.…”
Section: Discussionmentioning
confidence: 97%
“…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.…”
Section: Discussionmentioning
confidence: 99%
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“…The CT and MRI compatibility of titanium clamps and miniplates due to artifacts is absolutely identical [8]. Experiments in a 1.5 T MR tomograph with titanium clamps revealed no magnetic field attraction and that heating was minor and artifacts involved a relatively small signal void [14]. Table 2 compares the advantages and disadvantages of titanium clamps and miniplates.…”
Section: Discussionmentioning
confidence: 98%