Raw Data (Pre-Processing)
This process converts analog signals from detectors into digital data.
What is Analog-to-Digital Converter (ADC)?
This assigns different shades of gray to pixels based on their intensity.
What is grayscale?
This graphical tool displays the distribution and frequency of pixel values in an image.
What is a histogram?
This adjustment shifts the histogram left or right to change image lightness
What is brightness adjustment?
This system manages overall patient information in a hospital.
What is HIS (Hospital Information System)?
A pixel with a malfunction or sensor error.
What is a dead pixel?
This process increases the visibility of tissue borders but may cause halo artifacts if overused.
What is edge enhancement?
These define which part of the histogram should be used in displaying the final image.
What are values of interest (VOI)?
This stretches or compresses the histogram to alter the difference between structures.
What is contrast adjustment?
This system manages radiology-specific data like orders and reports.
What is RIS (Radiology Information System)?
This process assigns a gray-level number to each picture during image sampling.
What is quantization?
This technique improves visibility in both over- and under-exposed areas of an image.
What is equalization?
This series of equations adjusts original image brightness and contrast to match the desired output.
What is a Look-up Table (LUT)?
This is the ability to distinguish between similar tissues in an image.
What is contrast resolution?
This standard ensures compatibility of medical images across systems and vendors.
What is DICOM?
This correction method adjusts varying exposure levels to ensure consistent image brightness.
What is rescaling?
This type of filtering reduces noise but may slightly decrease spatial resolution.
What is smoothing or low-pass filtering?
This improves visualization, consistency, and detail enhancement.
What is a Look-Up Table?
This tool isolates and measures a specific part of an image
What is region of interest (ROI)?
This system allows for storing, retrieving, and viewing images across a network.
What is PACS (Picture Archiving and Communication System)?
This image correction method eliminates inconsistencies in the detector, including dead pixels.
What is flat fielding?
Overuse of this process can exaggerate structures and increase image noise.
What is edge enhancement?
This defines VOIs with high or low contrast.
What is a narrow and wide VOI?
This technique combines multiple images into one for areas like scoliosis series.
What is stitching?
This plan ensures continued workflow during system failures or outages.
What are downtime procedures?