Question

Which of the following is the appropriate range of coverage for a coronal sinus study?

a. from the internal auditory canals to the ethmoid sinus
b. from the clivus to the anterior clinoid process
c. from the fourth ventricle to the sphenoid sinus
d. from the dorsum sella to the anterior aspect of the frontal sinus

Answer 1

The correct range for a coronal sinus study is from the dorsum sella to the anterior aspect of the frontal sinus, covering key areas including the sphenoid and frontal sinuses as well as the ethmoid bone's crista galli and cribriform plates.

Step-by-step explanation:

The appropriate range of coverage for a coronal sinus study is from the dorsum sella to the anterior aspect of the frontal sinus. This range includes the sphenoid sinus, which is the most posterior of the paranasal sinuses located anterior and inferior to the sella turcica, and extends to the frontal sinus, which is the most anterior. The area of the ethmoid bone, consisting of the crista galli and cribriform plates, is also included, dividing the anterior cranial fossa at the midline.