The patient is automatically moved head first into the CT gantry, and the x-ray tomogram is acquired. Now the patient is automatically moved through the PET gantry, which is mounted in parallel with the CT gantry, and the PET slices are acquired. The patient may now leave the device, and the PET-CT software starts reconstructing and aligning the PET and CT images.
Diagnostic Procedures. Three common diagnostic procedures, tonometry, visual field tests, and ophthalmoscopy, enable ophthalmologists to screen patients for glaucoma. To make a definitive diagnosis, ophthalmologists often use all 3 procedures as part of an overall eye examination. The procedures are simple, relatively quick, and virtually painless.
This is called low pressure or normotensive glaucoma. Routine eye exams are important to check for glaucoma and detect it in its earliest stages. A dilated exam and check of eye pressure is done as well a variety of other scheduled tests such as optic nerve function, imaging tests, and peripheral vision exams.laucoma is a disease of the optic nerve. It causes a characteristic loss of nerve tissue manifested by loss of the nerve cells or axons going into the optic nerve.