How does a radiologist read a CT scan?
Each color represents a distinct part of your body: soft tissues, fat, air, and bone.
A change in color in a specific area of your body might indicate the presence of an abnormality.
Dense tissues, such as bone, are seen as white patches.
Both fat and air appear as black or dark gray in the image..
What are the 7 generations of CT scan?
generations of CT scanners. helical CT scanning. step and shoot scanning. ultra-high-resolution CT (UHRCT)CT x-ray tube.CT fluoroscopy.cone-beam CT..
What is CT number in radiology?
CT number is a special number which is a normalized value of the calculated X- ray absorption coefficient of a pixel (picture element), in a computed tomogram.
The absorption coefficient of a tissue varies with the nature of the tissue and the. energy (kV) of X-ray beam..
What is the detector in CT scanner?
A key component of a modern multi-slice CT scanner is the detector array: this senses the X-ray radiation which is partially attenuated by tissues in the patient's body and converts them into a digital signal..
What is the key advantage of computed tomography CT over conventional projection radiography?
In conventional x-rays, the structures overlap.
For example, the ribs overlay the lung and heart.
In an x-ray, structures of medical concern are often obscured by other organs or bones, making diagnosis difficult.
In a CT image, overlapping structures are eliminated, making the internal anatomy more apparent..
What is the purpose of the detector in a CT unit?
Detectors collect information regarding the degree to which each anatomic structure attenuated the beam during a CT Scan Machine.
Instead of film to record the attenuated beam digital x-ray detectors collect the information in CT Scans. “Detector” refers to a single element or type of detector used in a CT Scan system..
- Solid state crystal detectors are made from a variety of materials, like cadmium tungstate, cesium iodide, bismuth germinate and ceramic rare earth compounds like gadolinium of yttrius.
