Neuroimaging

Question 1

MacLellan, JAVMA, 2018:

What was predictive of outcome - tumor grade or pre-op tumor volume?

Answer 1

MacLellan, JAVMA, 2018:

Tumor grade was predictive of outcome

Question 2

Ramos, Vet Surg, 2015:

Effect of neck extension and flexion on cervical vertebral canal diameter?

Answer 2

Ramos, Vet Surg, 2015:

Cervical vertebral canal diameter decreased with extension and increased with flexion

Question 3

Allett and Hettlich, VRU, 2016:

1. Common MRI findings in dogs with spinal lymphoma?
2. Which MRI sequences were most useful for identification of spinal and paraspinal lesions?

Answer 3

Allett and Hettlich, VRU, 2016:

1. Multifocal disease (67%), vertebral involvement (83%), spinal cord compression (67%), involvement of >1 spinal compartment (100%)
2. STIR and T1W post-contrast sequences were most useful

Question 4

Specchi, JAVMA, 2016:

MRI characteristics of ANNPE vs FCE?

Answer 4

Specchi, JAVMA, 2016:

ANNPE: meningeal enhancement on post-contrast T1W FSE images, non-longitudinal (oblique/vertical) directional pattern of intramedullary hyperintensity on T2W FSE images
FCE: longitudinal directional pattern of intramedullary hyperintensity on T2W FSE images, greater length of intramedullary hyperintensity

Question 5

Gilmour, VRU, 2017:

Mean ratio of length of CSF attenuation to length of L2 in dogs that developed PMM vs dogs that did not?

Answer 5

Gilmour, VRU, 2017:

Mean ratio of length of CSF attenuation to length of L2 >7.4 was associated with development of PMM

Question 6

Noyes, Vet Surg, 2017:

Size of planned laminectomy defects based on MRI vs CT?

Answer 6

Noyes, Vet Surg, 2017:

Size of planned laminectomy defects tended to be larger based on MRI compared to CT

Question 7

Worth, Vet Surg, 2017:

1. Intervertebral neurovascular foramina volumes in DLSS-affected GSDs vs unaffected GSD vs Greyhounds?
2. Effects of positioning the LS junction in full extension?

Answer 7

Worth, Vet Surg, 2017:

1. Intervertebral foraminal volumes were smaller in affected GSDs
2. Positioning the LS junction in full extension decreases the volume of the LS neurovascular foramina, and was more pronounced in DLSS-affected GSDs than unaffected GSDs

Question 8

Housley, VRU, 2017:

Sagittal STIR sequences accurately identified IVDE in what % of cases where the evaluation of sagittal T2W sequences had provided a false negative diagnosis?

Answer 8

Housley, VRU, 2017:

67% of cases

Question 9

Masciarelli, VRU, 2017:

MRI sensitivity and specificity for diagnosis of intradural spinal cord neoplasia vs intramedullary neoplasia vs vascular myelopathy?

Answer 9

Masciarelli, VRU, 2017:

MRI had good sensitivity and moderate specificity for diagnosis of intradural spinal cord neoplasia but poor sensitivity for detection of intramedullary spinal cord neoplasia and vascular myelopathy

Question 10

Emery, VRU, 2018:

1. What breed of dog was less likely to require additional imaging?
2. What was associated with likelihood of needing additional imaging?

Answer 10

Emery, VRU, 2018:

1. Dachshunds were less likely to require additional imaging
2. Increasing age was associated with likelihood of needing additional imaging