MRI artifacts following anterior cervical diskectomy

Salazar, Jose L.; Misra, Mukesh; Bloom, Donna; Dobben, Glen D.

doi:10.1016/s0090-3019(96)00418-1

Cited by 15 publications

(17 citation statements)

References 5 publications

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“…Therefore, both ferromagnetic and nonferromagnetic substances can distort the local magnetic field and create a susceptibility artifact 3 . A susceptibility artifact occurs when there is a local deformity in the magnetic field due to magnetization of a tissue and results in spatial misregistration 1,3–5 . Magnetic susceptibility artifact also is characterized by large areas of signal void caused by spatial misregistration and a crescentic bright rim (inflection zone) due to overlap of signals from displaced structures.…”

Section: Discussionmentioning

confidence: 99%

“…The presence of magnetic susceptibility artifacts on postoperative MR images is documented in humans 1,2,6,7 . Susceptibility artifacts can be anticipated when metal implants are inserted 7 .…”

Section: Discussionmentioning

confidence: 99%

“…Susceptibility artifacts can be anticipated when metal implants are inserted 7 . When no implants are used, metallic susceptibility artifacts can still be detected in the surgical field 1,2 . In some patients these artifacts prevent accurate image interpretation, while in others the artifact may lead to a false diagnosis of spinal cord compression.…”

Section: Discussionmentioning

confidence: 99%

“…O ccasionally postoperative magnetic resonance (MR) imaging is required in patients that are not responding to treatment or whose neurologic condition is declining. In humans that have undergone cervical diskectomy, magnetic susceptibility artifacts are often found postoperatively 1,2 . In some patients the artifacts interfere with image interpretation, while in others the artifacts lead to a false diagnosis of spinal cord compression.…”

Section: Introductionmentioning

confidence: 99%

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Postoperative Susceptibility Artifact During Magnetic Resonance Imaging of the Vertebral Column in Two Dogs and a Cat

Freer¹,

Scrivani²

2008

Vet Radiology Ultrasound

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In humans that have undergone cervical diskectomy, magnetic susceptibility artifacts are often found on postoperative magnetic resonance (MR) images of the affected region. In some patients, these artifacts complicate image interpretation, while in others the artifacts lead to a false diagnosis of spinal cord compression. We describe two dogs and one cat that had susceptibility artifacts visible in postoperative MR images. In each patient, multiple, small-to-large, distinct, magnetic susceptibility artifacts were visible along the surgery site. In both dogs, interpretation was impossible and subsequently computed tomography (CT) was performed. During CT, no cause for the MR artifact was identified. The most likely source of the artifact is microscopic metal fragments from the burr, suction tip or other surgical instruments, but other possible causes include hemorrhage or paramagnetic suture material. These artifacts may cause difficulty in interpretation or suggest a clinical problem. MR imaging therefore might not be the most appropriate examination for patients following certain types of surgery due to the possibility of susceptibility artifacts. Although this artifact probably is common in the postoperative patient, the frequency that this finding will prevent accurate diagnosis is unknown.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Postoperative Susceptibility Artifact During Magnetic Resonance Imaging of the Vertebral Column in Two Dogs and a Cat

Freer¹,

Scrivani²

2008

Vet Radiology Ultrasound

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show abstract

“…MRI was considered the most useful tool and should be the modality of choice when determining causes of failed back surgery and when evaluating recurrent pain after lumbar interbody fusion. 2 However, the presence of artifacts can limit the usefulness of MRI alone, 3,4 and, at times, it can lead to misdiagnosis and malpractice, especially if the localization of the recurrent symptoms corresponds to that of the "false pathology" caused by artifacts. In our case, we did not even notice the presence of artifacts in the initial evaluation, and we mistook the artifact for pathology because the clinical symptom was well explained by the abnormal signal on MRI.…”

mentioning

confidence: 99%

MRI Artifact Mimicking Root Compression by Interbody Cage Displacement

Kwon

Kim

Park

2008

American Journal of Physical Medicine &Amp; Rehabilitation

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Artifacts in musculoskeletal magnetic resonance imaging: identification and correction

2001

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A large number of artifacts occur in magnetic resonance (MR) imaging of the musculoskeletal system. These artifacts may potentially affect the quality of MR images, and may also simulate pathologic conditions and produce pitfalls in interpretation. Motion artifacts may be periodic or random. Protocol-error artifacts include saturation, wraparound, radiofrequency (RF) interference, shading, and partial volume averaging artifacts. Truncation artifacts occur when the number of phase-encoding steps of high spatial frequencies is insufficient (or under-sampled) for faithful reproduction of the true anatomic detail of the original image. Chemical shift artifacts are due to the protons in fat being mismapped relative to water protons. Susceptibility artifacts occur at the interfaces of structures with different magnetic susceptibilities. Artifacts special to the musculoskeletal system include the magnic angle phenomenon and spurious signal induced at very short echo times, both of which affect anisotropic structures such as tendon, ligament, and cartilage. Recognition and, if possible, correction of these artifacts are an important aspect of practical musculoskeletal MR imaging.

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MRI artifacts following anterior cervical diskectomy

Cited by 15 publications

References 5 publications

Postoperative Susceptibility Artifact During Magnetic Resonance Imaging of the Vertebral Column in Two Dogs and a Cat

Postoperative Susceptibility Artifact During Magnetic Resonance Imaging of the Vertebral Column in Two Dogs and a Cat

MRI Artifact Mimicking Root Compression by Interbody Cage Displacement

Artifacts in musculoskeletal magnetic resonance imaging: identification and correction

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