Midterm 2

Question 1

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

Answer 1

Mo 30 Mo
24-26

Question 2

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

Answer 2

25
27-31

Question 3

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

Answer 3

Rh
25

Question 4

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

Answer 4

SPOT COMPRESSION

Question 5

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

Answer 5

Breast Compression

Question 6

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

Answer 6

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

Question 7

• Flat surface plate used for
uniform compression.

Answer 7

COMPRESSION
DEVICE

Question 8

Year___who__ uruguanian Radiologists 1st uses breast compression

Answer 8

1949 R.Leborgne

Question 9

Year__compression devices common on dedicated mammo unjts

Answer 9

1970

Question 10

2 type of screen film cassette

Answer 10

Conventionql Screen Film
Computed Radiography

Question 11

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

Answer 11

anti-scatter grids

Question 12

Chest wall-side
Nipple-side

Answer 12

Cathode
Anode

Question 13

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

Answer 13

GREATER

Question 14

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

Answer 14

ANODE HEEL
EFFECT

Question 15

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

Answer 15

0.3 to 0.4

Question 16

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

Answer 16

0.1

Question 17

source-toimage planedistance (SID)
typical – __ cm

Answer 17

60-65

Question 18

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

Answer 18

03

Question 19

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

Answer 19

0.02

Question 20

W Target with 0.__mm Rh filter

Answer 20

05

Question 21

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

Answer 21

Beryllium

Question 22

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

Answer 22

Molybdenum

Question 23

Dual Targets of Anode

Answer 23

Mo/Rh”

Question 24

focusing cup to produce 0.__mm

Answer 24

3

Question 25

0.__mm focal spot size (fss)

Answer 25

1

Question 26

•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)

Answer 26

CATHODE

Question 27

CO MP O NENT S:CCCBMG ▪

Answer 27

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

Question 28

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

Answer 28

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

Question 29

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

Answer 29

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

Question 30

• 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)

Answer 30

4 5 0.1mm inherent