DIGITAL MAMMOGRAPHY AND QUALITY ASSURANCE

Film-screen image receptor

is replaced by digital detectors that converts x-rays into electrical signals

electrical signals

The ___ are used to produce images of the breast that can be seen on a computer screen, or printed on special films to look like screen-film mammograms

20%-30% pathologie

Although the conventional mammography (film-screen) is effective ___of ___s are still missed.

digital mammography

Studies shown that ___ can detect 28% more cancers than conventional mammography

28%

Studies shown that digital mammography can detect ___ more cancers than conventional mammography

conventional mammography

Studies shown that digital mammography can detect 28% more cancers than ___

Full Field Digital Mammography

Cassetteless

Computed Mammography

Still uses a cassette

Computed Mammography

Adapts both conventional and digital mammography

Image Matrix

Layout of column and rows

Pixel

Corresponds to each cells in the matrix

Pixel

The number in the cells represents the brightness or intensity at that location.

Field of View

An operator dependent parameter that controls the size of the part to be imaged

Noise

Random background information that is detected but does not contribute to image quality

Noise

Imaging noise will decrease the ability to see tiny structure like microcalcification

Indirect Conversion, Direct Conversion

TYPES OF DIGITAL DETECTORS (2)