Notes in 10 Mammography physics

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Published	05/01/2023	Imaging Physics: Mammography PhysicsIn contact mammography, the kV is {{c1::decreased::increased/decreased}}, which improves image {{c2::con…
Published	05/01/2023	Imaging Physics: Mammography PhysicsContact mammography utilizes a {{c1::smaller::smaller/larger}} focal spot, which improves image {{c2::resolut…
Published	05/01/2023	Imaging Physics: Mammography PhysicsIn contact mammography, {{c2::more::more/less}} photons are deposited on the detector, resulting in lower&nbs…
Published	05/01/2023	Imaging Physics: Mammography PhysicsContact mammography utilizes {{c1::more::more/less}} exposure
Published	05/01/2023	Imaging Physics: Mammography PhysicsContact mammography utilizes {{c1::more::more/less}} mAs
Published	05/01/2023	Imaging Physics: Mammography PhysicsContact mammography utilizes a {{c1::smaller::larger/smaller}} grid ratio.
Published	05/01/2023	Imaging Physics: Mammography PhysicsContact mammography utilizes a {{c1::higher::higher/lower}} Film gradient.
Published	05/01/2023	Imaging Physics: Mammography PhysicsContact mammography utilizes {{c1::higher::higher/lower}} luminance viewboxes
Published	05/01/2023	Imaging Physics: Mammography PhysicsContact mammography utilizes {{c1::single}}-emulsion films, which improves image {{c2::resolution}}
Published	05/01/2023	Imaging Physics: Mammography PhysicsContact mammography takes advantage of the {{c1::anode heel}} effect
Published	05/01/2023	Imaging Physics: Mammography Physics{{c1::Anode heel}} effect refers to the lower field intensity towards the {{c2::anode::anode/cathode}} in com…
Published	05/01/2023	Imaging Physics: Mammography PhysicsBreast compression in mammography results in {{c1::improved::improved/worsened}} contrast and resol…
Published	05/01/2023	Imaging Physics: Mammography PhysicsIn contact mammography, there is {{c1::increased::increased/decreased}} gamma film, which improves image…
Published	05/01/2023	Imaging Physics: Mammography Physics{{c1::Molybdenum (Mo)}} targets (K-edge {{c2::20}} keV) generate characteristic X-rays at {{c3::17}} and {{c3…
Published	05/01/2023	Imaging Physics: Mammography Physics{{c3::Mo}} filters greatly {{c1::reduce::reduce/increase}} low-energy X-rays, which do not contribute to imag…
Published	05/01/2023	Imaging Physics: Mammography Physics{{c3::Mo}} filters {{c1::reduce::reduce/increase}} high-frequency X-rays, which {{c2::decreases}} contra…
Published	05/01/2023	Imaging Physics: Mammography Physics{{c1::Rhodium (Rh)}} filters shift the spectrum to the {{c2::right}}, and are used for {{c3::thicker/denser::chara…
Published	05/01/2023	Imaging Physics: Mammography Physics{{c1::Rh}} targets and {{c1::Rh}} filters are used in conjunction for even thicker breasts.
Published	05/01/2023	Imaging Physics: Mammography PhysicsBreast compression in mammography results in {{c1::greater::greater/lesser}} x-ray penetr…
Published	05/01/2023	Imaging Physics: Mammography PhysicsBreast compression in mammography results in {{c1::improved::improved/worsened}} density unifo…
Published	05/01/2023	Imaging Physics: Mammography PhysicsBreast compression in mammography results in {{c1::decreased::increased/decreased}} scatter.
Published	05/01/2023	Imaging Physics: Mammography PhysicsBreast compression in mammography results in {{c1::lesser::greater/lesser}} dose.
Published	05/01/2023	Imaging Physics: Mammography PhysicsBreast compression in mammography results in {{c1::decreased::increased/decreased}} tissue ove…
Published	05/01/2023	Imaging Physics: Mammography PhysicsBreast compression in mammography results in {{c1::decreased::increased/decreased}} focal spot…
Published	05/01/2023	Imaging Physics: Mammography PhysicsDigital mammography utilizes a pixel size of ~{{c1::80}} μm, with the smallest visible microcalcificatio…
Published	05/01/2023	Imaging Physics: Mammography PhysicsDigital mammography: Resolution ~3,000 x 4,000 pixels → at 2 bytes/pixel = {{c1::24}} MBFor viewing, nee…
Published	05/01/2023	Imaging Physics: Mammography PhysicsMammography {{c4::Magnification}} = {{c3::SID/SOD::equation}}, where: SID = {{c2::source-image}} distance SOD = {{…
Published	05/01/2023	Imaging Physics: Mammography PhysicsIn magnification mammography, the SID is typically {{c1::65}} cm, and the SOD is {{c2::35}} cm
Published	05/01/2023	Imaging Physics: Mammography PhysicsSource-image distance (SID) is is {{c1::directly::directly/inversely}} proportional to exposure time.
Published	05/01/2023	Imaging Physics: Mammography PhysicsSource-image distance (SID) is is {{c1::inversely::directly/inversely}} proportional to focal spot blur.
Published	05/01/2023	Imaging Physics: Mammography PhysicsIs a grid required for magnification mammography?{{c1::No; air gap introduced}}
Published	05/01/2023	Imaging Physics: Mammography PhysicsMagnification mammography utilizes a focal spot of {{c1::0.1}} mm
Published	05/01/2023	Imaging Physics: Mammography PhysicsMagnification mammography technique summary: {{c1::25}} mA current {{c2::3}} second exposure {{c3::70}} mAs
Published	05/01/2023	Imaging Physics: Mammography PhysicsMagnification mammography utlizes {{c1::lesser::greater/lesser}} total mAs than contact mammography
Published	05/01/2023	Imaging Physics: Mammography PhysicsThe {{c1::Mammography Quality Standards Act of 1992 (MQSA)}} was enacted by the United States Congress to regulate…
Published	05/01/2023	Imaging Physics: Mammography PhysicsPer the MQSA, the interpreting physician needs to have read {{c1::240}} mammograms in the last {{c2::24}} months o…
Published	05/01/2023	Imaging Physics: Mammography PhysicsPer the MQSA, a {{c1::quality control}} program must be in place.
Published	05/01/2023	Imaging Physics: Mammography PhysicsPer the MQSA, phantom must be tested {{c1::weekly::frequency}} with an average glandular dose <{{c2::3}} mGy wi…
Published	05/01/2023	Imaging Physics: Mammography PhysicsFor mammography, there is a federal requirement that the average glandular dose be <{{c1::3 mGy per view per br…
Published	05/01/2023	Imaging Physics: Mammography PhysicsFor mammography, a typical average glandular dose is ~{{c1::1.5-1.8}} mGy per view per breast (digital slightly {{…
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