What does a CT scan of this area show?
The sella turcica is the bony bed of the pituitary gland at the base of the skull. Computed tomography excellently visualizes its bone walls: widening of the sella, thinning and destruction of the walls, changes in the shape of the bottom - indirect signs of a growing adenoma. The method is also used when an empty sella turcica is suspected and when planning a transsphenoidal approach to the pituitary gland, when the surgeon needs precise bony anatomy of the sphenoid sinus. It is important to understand: the pituitary gland itself and microadenomas are better visible on MRI with dynamic contrast, so CT here complements and does not replace magnetic resonance imaging.
What is the power of computed tomography?
MSCT creates an image using X-rays and produces thin sections with high spatial resolution. It is indispensable where bone, lung tissue, fresh hemorrhage and precise vessel geometry are important, as well as in emergency situations - the examination takes seconds.
Three-dimensional reconstructions are constructed from the resulting sections: this allows the surgeon to see the anatomy in volume in advance and plan the intervention.
When you need contrast
Intravenous contrast dramatically increases the information content in the study of blood vessels, tumors, inflammatory processes and parenchymal organs. It shows the nature of the blood supply to the formation, which often determines its nature.
Before a contrast study, kidney function is assessed by creatinine level and an allergic history is clarified - reactions to iodine-containing drugs are rare, but require attention.
CT or MRI
- CT scan is better: bones, lungs, acute hemorrhage, stones, vessels, emergency conditions
- MRI is better: brain and spinal cord, soft tissues, joints, pelvis, liver
- CT is faster and more accessible, MRI does not provide radiation exposure
About radiation exposure
Computed tomography uses x-rays and is therefore prescribed according to indications. Modern machines use dose reduction protocols, and the information obtained from sound research usually far outweighs the risk. During pregnancy, CT scans are performed only for health reasons.