This work was supported by the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea government (MEST) (R11-2002-103) and Bio R&D program through the Korea Science and Engineering Foundation funded by the Ministry of Education, Science and Technology (M10530010001-06N3001-00110).
MAGNETIC RESONANCE IMAGING OF THE CANINE BRAIN AT 7 T
Article first published online: 26 OCT 2009
© Copyright 2009 by the American College of Veterinary Radiology
Veterinary Radiology & Ultrasound
Volume 50, Issue 6, pages 615–621, November/December 2009
How to Cite
KANG, B.-T., KO, K.-J., JANG, D.-P., HAN, J.-Y., LIM, C.-Y., PARK, C., YOO, J.-H., KIM, J.-W., JUNG, D.-I., KIM, Y.-B., WOO, E.-J., CHO, Z.-H. and PARK, H.-M. (2009), MAGNETIC RESONANCE IMAGING OF THE CANINE BRAIN AT 7 T. Veterinary Radiology & Ultrasound, 50: 615–621. doi: 10.1111/j.1740-8261.2009.01591.x
Kang and Ko contributed equally to this work as cofirst authors.
- Issue published online: 26 OCT 2009
- Article first published online: 26 OCT 2009
- Received January 31, 2009; accepted for publication May 11, 2009.
- 7 T;
- magnetic resonance imaging
The purpose of this study was to describe relevant canine brain structures as seen on T2-weighted images following magnetic resonance (MR) imaging at 7 T and to compare the results with imaging at 1.5 T. Imaging was performed on five healthy laboratory beagle dogs using 1.5 and 7 T clinical scanners. At 1.5 T, spin echo images were acquired, while gradient echo images were acquired at 3 T. Image quality and conspicuity of anatomic structures were evaluated qualitatively by direct comparison of the images obtained from the two different magnetic fields. The signal-to-nose ratio (SNR) and contrast-to-noise ratio (CNR) were calculated and compared between 1.5 and 7 T. The T2-weighted images at 7 T provided good spatial and contrast resolution for the identification of clinically relevant brain anatomy; these images provided better delineation and conspicuity of the brain stem and cerebellar structures, which were difficult to unequivocally identify at 1.5 T. However, frontal and parietal lobe and the trigeminal nerve were difficult to identify at 7 T due to susceptibility artifact. The SNR and CNR of the images at 7 T were significantly increased up to 318% and 715% compared with the 1.5 T images. If some disadvantages of 7 T imaging, such as susceptibility artifacts, technical difficulties, and high cost, can be improved, 7 T clinical MR imaging could provide a good experimental and diagnostic tool for the evaluation of canine brain disorders.