Mammograpgy
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| show | Requires different techniques from conventional radiography due to the structures subject contrast that is being imaged
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| 1920 | show 🗑
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| show | First utilized low kVp and high mAs techniques.
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| 1960 | show 🗑
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| 1990 | show 🗑
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| show | ACR volunteer accreditation program.
MQSA federally mandated act.
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| show | Eight.
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| Diagnostic Mammography | show 🗑
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| show | - Performed as a preventative measure.
- Usually done between the ages of 40 and 49.
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| Baseline Mammogram | show 🗑
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| Fibrous Tissue | show 🗑
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| show | - Mainly in pre-menopausal women.
- The most sensitive tissue to cancer induction by radiation.
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| show | Replaces fibrous and glandular tissue in postmenopausal women.
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| show | Dedicated mammographic imaging systems are designed for flexibility in patient positioning and have an integral compression device, low-ratio grid, AEC and micro-focus x-ray tubes.
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| High Voltage Generation | show 🗑
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| Target composition is composed of either: | show 🗑
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| show | -Must be very small: .3 mm or .1 mm.
-Preferably round.
- Anode angle of approximately 23.
- Tube tilt of 6 degrees.
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| show | Tilted.
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| show | - The window must be equivalent of .1 mm Al.
- Total beam filtration should not be less than .5 mm Al.
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| Heel Effect | show 🗑
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| Vigorous ______________ must be used to provide an even tissue density to be radiographed. | show 🗑
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| show | - The act of flattening the soft tissue to improve optical density is important.
- Improves spatial resolution and contrast resolution.
- Will also lower patient dose.
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| show | - Composed of copper as grid strip material and air for interspace material.
- Uses a honeycomb design for its construction.
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| show | - Designed to measure x-ray intensity and x-ray quality.
- Positioning of photocell depends on patient anatomy.
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| Magnification Mammography | show 🗑
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| show | 1. Direct-exposure film.
2. Xeroradiography.
3. Screen film radiography.
4. Digital radiography.
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| Types of Mammograms that are used today: | show 🗑
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| Magnification Factor | show 🗑
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| Screen Film Mammography | show 🗑
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| Screen Film Mammography: | show 🗑
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| show | - Replaces the screen and film with a scintillator attached to a charged couple device (CCD) or a thin film transistor (TFT).
- CCD and TFT converts light from scintillator plate into and electronic signal.
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| Digital Mammography: | show 🗑
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| show | - A digital mammogram is repeated several times at various angles.
- Each image is available in digital form and may be
reconstructed as a 3D image.
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| show | The accentuation of interface between different tissues.
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| Focal spot anode angle of how much? | show 🗑
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| Dedicated mammographic imaging systems are designed for | show 🗑
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| show | .5 mm Al.
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| show | The patient's anatomy.
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| show | - Ionization chambers.
- Solid state diode.
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| show | 6 degrees.
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| What three beneficial things does compression also do? | show 🗑
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| show | When the x-ray tube is tilted in its housing, the
effective focal spot is small, the x-ray intensity
is more uniform, and tissue against the chest is
imaged.
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| SID for Mammography | show 🗑
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| What does magnification mammography use? | show 🗑
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