Page 17 - Atlas of Small Animal CT and MRI

Nasal Cavity and Paranasal Sinuses 7

Figure 1.1.2 Normal Nasal Cavity (Canine) MR

MR images of the nose provide good
detail of the nasal turbinates. Normal turbi-
nates are scrolled and symmetrical. They
appear moderately intense on T1 images
(a) and hyperintense on T2 (c), PD (d), and T1
contrast-enhanced (b) images.

(a) T1, TP (b) T1+C, TP

(c) T2, TP (d) PD, TP

Figure 1.1.3 Normal Nasal Cycle (Canine) CT
Typical appearance of normal ectoturbinates
in the midnasal cavity (a). The nasal cycle
results in turbinate asymmetry due to nonuni-
form mucosal perfusion (b). This is a normal
physiologic phenomenon that is thought to
accelerate the rate of nasal mucosal healing
from minor injury due to nasal airflow. The
nasal cycle has a periodicity of 2–3 hours in
dogs.

(a) CT, TP (b) CT, TP

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