3D CT Scan - Skull Test

Computed Tomography scan scan is abbreviated as CT scan. It is a combination of computer processes and X-ray imaging system which helps to generate cross-sectional images of the organs being scanned. This helps us to understand the inner side of the organ as if in cut sections. Adding digital geometry processing to the CT scan helps us in finding volumes of the organs being scanned by taking continuous radiographs around a single rotational axis. CT scan further is of many types such as Positron Emission Tomography, Single Photon Emission Computed Tomography. CT scan has both diagnostic and therapeutic uses.

Performing a CT scan for any organ will take approximately 10-15 minutes of time. During the scanning process, the patient will have to lie in supine, prone or sideways position. The patient should be instructed about the procedure of the process beforehand. The patient should be asked to lie down peacefully without any anxiety. The patient should also be instructed that the procedure is noninvasive. In case there is need to detect about any defects with the blood supply or the blood vessels, the dye should be injected into the blood vessels via the brachial, radial or femoral vein which is then observed through continuous radiographic images.

CT scan is the diagnostic examination done in most of the emergency and serious cases CT scan is usually used to detect infarcts, haemorrhages, tumours, extra growth, calcifications, bone tumours, etc. Edema of meninges of the brain or infarcts in the blood vessels supplying the brain can be detected by hypo dense areas. Hemorrhages and calcifications appear as bright areas.

• The patient is passed through the Ct scan machine. The CT scan machine is circular and is more like a tunnel.
• This machine operates through x-ray generator which rotates around the patient which releases the x-rays. There is x-ray detector placed opposite to the x-ray generator on the circle.
• The raw visual presentation of the data is called sinogram and this is not the interpretation which is sufficient and needs to be processed.
• The processing of the data is done through tomographic reconstruction which produces the outcome of the series of images in cross-sectional view.
• Iodine-based radio contrasts are used to detect structures such as blood vessels which otherwise cannot be differentiated from the surround soft tissue.