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.
What is Magnetic Resonance Angiography (MRA)? Magnetic resonance imaging (MRI) is a radiological technique of producing fine detailed images of the body without exposure to radiation. The radiofrequency waves generated in the presence of a strong magnetic field can generate cross sectional images which are then reconstructed as 3 dimensional pictures by a computer.