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Focal Spot
the area of an X-ray tube that emits X-rays to create an image -
XRay Tube
located in the gantry of CT scanner
emits beams of X-rays that pass through the patient's body -
Beam Shaping Filter
bow tie” (BT) filters are used to spatially modulate the x-ray beam in a CT scanner -
Pre patient collimation
a device in a CT scanner that limits the area of the patient exposed to the X-ray beam -
Xray beam
passes through the patient's body, and detectors measure how the beam changes as it passes through different tissues -
Scan Field of View
refers to the actual area of anatomy that is scanned by the machine during data acquisition -
Patient
patient lies on a bed that slowly moves through the gantry while the x-ray tube rotates around the patient, shooting narrow beams of x-rays through the body -
Pre detector collimator
The collimator is located between the patient and the detectors.
It absorbs low-energy X-rays and reduces scattered radiation.
This reduces image noise and improves contrast.
It also decreases the number of photons needed for image production, which lowers the patient's total radiation exposure -
Detector
a digital X-ray device that captures X-rays that pass through a patient's body. The detector converts the X-rays into electrical signals that are sent to a computer to create an image. -
Electrical signal
created when x-rays pass through a patient's body and hit detectors. These signals are then converted into images by a computer. -
ADC
Apparent diffusion coefficient (ADC) is a measurement of cellularity that can be used in conjunction with CT scans in radiation therapy -
Digital Data
series of image files that are created from X-ray images of a patient -
Computer array processor
high-speed computer that processes large amounts of digital data to create images. Array processors are used to perform repetitive operations like image processing and reconstruction. -
DAC
for "Digital-to-Analog Converter," which is the component responsible for converting the digital data acquired by the CT scanner into an analog signal that can be displayed on a monitor, essentially creating the visible image on the screen -
Monitor
Where images collected are displayed