Areas of the lungs outside the alveoli where gas exchange with the blood does not take place. During adulthood, explain why vital capacity changes with age. As one ages, the elastic fibers in the lung gradually decrease as well. elastance and greater compliance of the lungs.
Brain aneurysm: An mri/mra of the brain is an excellent screening test for the detection of even small (2-3 mm) brain aneurysms. Some neurosurgeons may recommend a ct angiogram of the brain or even a cerebral angiogram to be absolutely sure of the initial test results. Discuss the best option for you with a cerebrovascular neurosurgeon.
MRA is typically used to detect aneurysms, atherosclerosis, dissection, vasculitis, and other congenital malformations. On the other hand, MRI is used to detect injuries, abnormalities or diseases in internal organs. MRIâs are particularly helpful in diagnosing tumors and cancers inside body.