MIDTERM PT. 2 Flashcards
Equipment parts: (mammogram)
- x-ray tube
- tube port
- filter
- .collimator
- compression paddle
- grid
- x-ray detector
- phototimer detector
Components of : (mammogram)
- c-arm x-ray tube stand
- mammography tube
- beam restricting device
- grid
- casette holder
- others
Patient support includes:
- lead apron
- holding support
- seating table
- patient gown
mammography tube consists of: (2)
anode +
cathode -
cathode has a ___ and ___
focusing cup
filament
The mammography x-ray tube is configured with dual-filaments in the
focusing cup to produce 0.3mm and 0.1mm focal spot size(fss)
cathode
dual-filaments in the focusing cup to produces ____and____ focal spot size (fss)
0.3mm
0.1mm
Anode Target Materials:
1.Molybdenum
2. Rhodium
3. Tungsten
most common anode target material used in mammography x-ray tube (soft tissue imaging)
molybdenum
“Dual Targets are also used ____”
Mo/Rh
what type of x-ray tube:
-glass envelope
-tungsten anode
-anode angle 7 degrees to 16 degrees
-axis of rotation- horizontal
-Al filter for dose reduction
Conventional x-ray tube
what type of x-ray tube:
-metal tube housing
-grounded Mo, Rh anode
-anode angle is o degree- tube tilt 16 degrees-
-axis of rotation- vertical
-Mo and Rh filters for special shaping
Mammography x-ray tube
used for special shaping
Mo and Rh
Made up of Beryllium (Beryllium Window / Be Window)
exit window
____ proximal collimator for the reduction of extra focal radiation
focus
used as it has a low atomic number of 4
Beryllium
Beryllium has a low atomic number of ____ and lower absorption of less than ____.
4
5kVp
___ of Be is equivalent to ____ Al material (inherent filtration)
1mm
0.1mm
Mo target with 0.03 mm Mo filter (atomic no. _____)
42
Rh target with 0.02mm Rh filter (atomic no. _____)
45
___ Target with ____ Rh filter
W
0.05mm
Target filter recommendations are for:
- fatty breast up to ~4 cm thick
- glandular breast~ 5 to 7 cm
- breast thickness > 7 cm