Funding sources: None.
MAGNETIC RESONANCE IMAGING METALLIC ARTIFACT OF COMMONLY ENCOUNTERED SURGICAL IMPLANTS AND FOREIGN MATERIAL
Article first published online: 26 JAN 2012
© 2012 Veterinary Radiology & Ultrasound
Veterinary Radiology & Ultrasound
Volume 53, Issue 3, pages 312–317, May/June 2012
How to Cite
Sutherland-Smith, J. and Tilley, B. (2012), MAGNETIC RESONANCE IMAGING METALLIC ARTIFACT OF COMMONLY ENCOUNTERED SURGICAL IMPLANTS AND FOREIGN MATERIAL. Veterinary Radiology & Ultrasound, 53: 312–317. doi: 10.1111/j.1740-8261.2011.01916.x
- Issue published online: 16 MAY 2012
- Article first published online: 26 JAN 2012
- Manuscript Accepted: 15 DEC 2011
- Manuscript Received: 17 AUG 2011
- magnetic resonance imaging;
- susceptibility artifact;
- veterinary implants
Magnetic resonance imaging (MRI) artifacts secondary to metallic implants and foreign bodies are well described. Herein, we provide quantitative data from veterinary implants including total hip arthroplasty implants, cranial cruciate repair implants, surgical screws, a skin staple, ligation clips, an identification microchip, ameroid constrictor, and potential foreign bodies including air gun and BB projectiles and a sewing needle. The objects were scanned in a gelatin phantom with plastic grid using standardized T2-weighted turbo-spin echo (TSE), T1-weighted spin echo, and T2*-weighted gradient recalled echo (GRE) image acquisitions at 1.5 T. Maximum linear dimensions and areas of signal voiding and grid distortion were calculated using a DICOM workstation for each sequence and object. Artifact severity was similar between the T2-weighted TSE and T1-weighted images, while the T2*-weighted images were most susceptible to artifact. Metal type influenced artifact size with the largest artifacts arising from steel objects followed by surgical stainless steel, titanium, and lead. For animals with metallic surgical implants or foreign bodies, the quantification of the artifact size will help guide clinicians on the viability of MRI.