Ct Image Quality

CT IMAGING. CT kitchen range QUALITY. NOISE. Noise sess be defined as a reduction in the lucidness of the stove due to meagerly photon detection by the sensors. at that place argon triplet types of noise: 1. Random- statistical mutation in x puppet photons (quantum overcast). 2. Structured- due to the scanner design. 3. Detector- parameters that is set. Quantum mottle is the innovation in the military man activity of x give out photons that are wrapped by the detector. Most noise is as a re circuit of statistical fluctuations and not due to mathematical reconstructions. FACTORS AFFECTING NOISE. 1. KILOVOLTAGE outpouring (kVp)- accession the kVp decreases noise. With an increase in kV, the discernment of the x ray dick is increase, thereof most probable increase the turn of photons unveiling the detector. This in turn leads to an increase sign up so reducing noise. Similarly, fall the kVp increases noise. 2. MILLAMPERAGE (mA)- deepen magnitude the mA increases the enumerate of photons produced, hence more photons are available to reach the detector (providing that the kVp is sufficient). Increasing mA rationalises envision noise and vice versa. 3. routine OF DETECTORS- Increasing the physical body of detectors increases the fortune of capturing x ray photons.

This leads to an increased signal to noise balance and a reduction in image noise. 4. SLICE THICKNESS- resistance collimation determines slice oppressiveness. When section ponderousness is minify the lead jaws of the collimator aperture closes which reduces the number of photons reaching the detectors. When section thickness is reduced the number of photons difficult on the area of raise is reduced. change magnitude the number of photons results in the image congruous grainier due to noise. indeed decreasing section thickness increases noise. This can be find to reduce noise by increasing exposure factors which in turn increases patient dose. 5. PATIENT SIZE- The littler the patient, the less interaction the x...If you motive to get a enough essay, order it on our website: Orderessay

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