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MAMMOGRAPHY > Midterm 2 > Flashcards

Midterm 2 Flashcards

1
Q

Target filter recommendation
4cm fatty breast
__ target &__ micron __ filter
__-__ kvp

A

Mo 30 Mo
24-26

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2
Q

Glandular breast 5-7 cm
Mo target & __ micron __ filter
__ kVp

A

25
27-31

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3
Q

Breast thickess higher 7cm
__ target & __ micron Rh filter

A

Rh
25

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4
Q

It is used to magnify small
area of the breast for better
visualization

A

SPOT COMPRESSION

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5
Q

Reduces breast thickness, motion, geometric unsharpness, xray scatter & beam hardening
- lowers radiation dose
-spreads breast tissues apart
-produces a more uniform thickness
- allows use of narrow latitude, high contrast film.
- improve contrast

A

Breast Compression

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6
Q

Breast biphasic compression Advantages:
1. Provides
2.produces
3. Improves
4. Reduces

A

Produces radiograph of uniform
density
Improves contrast
Reduces tissue overlap and
improves resolution
Provides immobilization of the part
during exposure

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7
Q

• Flat surface plate used for
uniform compression.

A

COMPRESSION
DEVICE

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8
Q

Year___who__ uruguanian Radiologists 1st uses breast compression

A

1949 R.Leborgne

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9
Q

Year__compression devices common on dedicated mammo unjts

A

1970

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10
Q

2 type of screen film cassette

A

Conventionql Screen Film
Computed Radiography

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11
Q

must be a moving grid.
•Focused grid, with a
grid ratio 3:1 or 5:1

A

anti-scatter grids

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12
Q

Chest wall-side
Nipple-side

A

Cathode
Anode

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13
Q

THE SMALLER THE ANODE ANGLE, THE
___ THE ANODE HEEL EFFECT:

A

GREATER

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14
Q

One fortunate
consequence of the
line focus principle
• Radiation Intensity
on the cathode side
of the x-ray tube is
higher that the
anode side

A

ANODE HEEL
EFFECT

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15
Q

__mm for contact mammography (breast compressed against the grid and image receptor

A

0.3 to 0.4

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16
Q

__ mm for magnification mammography, it
reduces geometric blurring so that
microcalcifications can be resolved.

A

0.1

17
Q

source-toimage planedistance (SID)
typical – __ cm

A

60-65

18
Q

Mo target with 0.__ mm Mo filter (atomic no. 42)

A

03

19
Q

Rh target with __mm Rh filter (atomic no. 45)

A

0.02

20
Q

W Target with 0.__mm Rh filter

A

05

21
Q

FILTRATION
A. E X IT WINDOW
•Made up of
___

A

Beryllium

22
Q
  • most common anode target materialused in mammography x-ray tube (soft tissue imaging)
A

Molybdenum

23
Q

Dual Targets of Anode

A

Mo/Rh”

24
Q

focusing cup to produce 0.__mm

A

3

25
Q

0.__mm focal spot size (fss)

A

1

26
Q

•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)

A

CATHODE

27
Q

CO MP O NENT S:CCCBMG
▪

A

C-Arm X-ray Tube Stand
▪ Mammography Tube
▪ Beam Restricting Device
▪ Compression Device
▪ Grid
▪ Cassette Holder
▪ Others

28
Q

CONVENTIONAL XRAY UNIT

TARGET MATERIAL:
Housing:
Exit window:
Tube target:
Axis of rotation:
Anode Angle:
Filtration:
FSS:
TYPE OF XRAY GENERATOR:
SID:

A

Tungsten anode
Glass envelope
Pyrex
Tungsten
Horizontal
7-16 degrees
Al
0.1mm
High frequency
Short as possible

29
Q

Mammography unit

TARGET MATERIAL:
Housing:
Exit window:
Axis of rotation
Tube target:
Anode Angle:
Filtration:
FSS:
TYPE OF XRAY GENERATOR:
SID:

A

Grounded Mo, Rh anode
Metal tube
Beryllium
Vertical
Mo
0-26 deg.
Mo or Rh filter
0.3-0.4mm
Grids
60-65 cm

30
Q

• used as it has a low atomic number of
_ and lower absorption of less than _ kVp.
• 1mm of Be is equivalent to __mm
Al material (__
filtration)

A

4
5
0.1mm
inherent

MAMMOGRAPHY (7 decks)

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