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What is Grid?
Our
X-ray Grids incorporated the purest aluminum foil for
the inter-spacer and high quality lead foil the X-ray
absorber. The offers lower exposure multiplier and
results in better absorption of scatter radiation. Its
effect produces a general radiographic fog on the film
which reduces the contrast. Our X-ray Grids are
manufactured by highly trained technical experts using
high precision machinery under the strictest quality
control.
Our Grids
has recently developed a brand new grid which is
made of lightweight damage-resistant Polyester fiber
inter-spacer for mammography x-ray systems and will
provide dramatically improved contrast and more
consistent image quality.
Aluminum
Interspaced X-ray Grids
X-ray Grids incorporated the purest aluminium foil for
the inter-spacer and high quality lead foil the X-ray
absorber. The offers lower exposure multiplier and
results in better absorption of scatter radiation. Its
effect produces a general radiographic fog on the film
which reduces the contrast. Our X-ray Grids are
manufactured by highly trained technical experts using
high precision machinery under the strictest quality
control.
Grids come in many different combinations of ratio and
lines per inch. The higher ratio of the grid(dependent
on the height of the lead strips and the thickness of
the inter-spacer) the better clean-up. Grid ratios of 8
: 1, 10 : 1, 12 : 1 are the most common and a range of
lines from 85 to 130 lines per inch (We have a product
of 150, 180 line/inch) the most frequently supplied.
Parallel and focused Grids (focused to various
distances) are all in our product portfolio. When
ordering x-ray grids, please specify size, lines/inch,
ratio, focal Distance.
Mammography X-ray Grids - Polyester interspaced
Scattered radiation reduces subject contrast in
mammography. This results in impaired detection of
calcifications and outlines of tumor masses. To
overcome this problem both moving and stationary grids
have been developed for mammography. General purpose,
moving grids cannot be utilized for mammography because
of high absorption of X-ray by the inter-spaced
material. Moving grids designed for mammography are
thinner than convention grids and have polyester
inter-spacer material. Many of the new mammography X-ray
machines contain these grids mounted in a reciprocating
Bucky mechanism, to make the grid lines invisible.
Our Grid has developed a mammography grid with dower
dose. General specifications of mammo grids are as
below;
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SIZE |
24 X 18 cm, 30 X 24 cm |
|
SID |
48cm, 58cm, 60cm, 66cm, 76cm
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RATIO |
4:1, 5:1, 6:1, 8:1
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LINE/INCH (cm) |
40Lines/cm, 36Lines/cm, 34Lines/cm
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USING MOLY TARGET TUBE WITH BERYLLIUM WINDOW
For more detailed information, please contact us with
your specifications described in hole locations, size
and ratio etc..
How to choose a right grid for your x-ray systems?
Our Grids offers a full line of aluminum
interspaced x-ray grids of the highest and the
most precise quality to the radiologist.
Our grids contain the purest lead
available to ensure superior efficiency in
removing scattered radiation. Superior quality
images are achieved through the use of
aluminum inter-spacers and lead strips which
are precisely milled to uniformity. Grid
strips are sealed between a smooth aluminum
cover and finished in enamel providing
complete resistance to heat and moisture
guaranteeing years of trouble free service.
Our
grids are available in :
Selecting The Right Grid
|
Cleanup |
Type of Grid |
Positioning
attitude |
Recommended To |
Remarks |
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Superlative
|
8:1 ratio
criss-cross |
Distance-fair:
centering & leveling slight
|
120kvp
|
Not recommended for tilted tube
techniques.
|
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Superlative
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15:1 ratio
linear
|
Very slight
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Over 100kvp
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Extra care required for proper alignment.
Usually used in fixed mount.
|
|
Excellent |
6:1 ratio
criss-cross |
Good
|
110kvp
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Not suitable for tilted tube techniques.
|
|
Excellent
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12:1 ratio
linear
|
Very slight
|
110kvp
also for higher kvp's |
Extra care required for proper alignment.
Usually used in fixed mount.
|
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Very Good
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5:1 ratio
criss-cross
|
Extreme
|
110kvp
|
Tube tilt limited 5。
|
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Very Good
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10:1 ratio
linear
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Slight
|
100kvp
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Reasonable care required for proper
alignment.
|
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Good
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8:1 ratio
linear
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Distance-fair:
centering & leveling slight
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100kvp
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For general stationary grid use.
|
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Moderate |
6:1 ratio
linear |
Good
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80kvp
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Least expensive of stationary grids.
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Moderate
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5:1 ratio
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Extreme
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80kvp
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Very easy to use.
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Listed in descending order of cleanup
effectiveness.
Selection
Basis of Cleanup Requirements
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Cleanup
|
Type of grid
|
Positioning
|
Recommended To
|
|
Excellent
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12:1 ratio
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Very slight
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110 Kvp or more higher Kvp
|
|
Very
good
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10:1 ratio
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Slight
|
100 Kvp
|
|
good
|
8:1 ratio
|
Slight
|
100 Kvp
|
|
Moderate
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6:1 ratio
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Good
|
80 Kvp
|
|
Moderate
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5:1 ratio
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Extreme
|
80 Kvp
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Bucky Factor Guide
These graphs show Bucky factors average from
result of test with various phantoms. Bucky
factor vary depending on regions radiographed
so use these graphs only as a guide


When ordering Super-line grids, please specify
size, ratio, focal distance and density
(number of lines). For special sizes, your
order must also state "Overall Dimensions"
Lead strips will always be parallel to the
long dimension unless otherwise ordered.
What is the specification of Grids ?
Grid
Composition Part
|
Density
|
Inter-spacer
|
X-Ray absorbing part
|
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80-85 Line/Inch |
0.25m/m AL-Foil |
0.05 m/m Lead-Foil
|
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100-103 Line/Inch |
0.20m/m AL-Foil |
0.05 m/m Lead-Foil
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120 Line/Inch |
0.15m/m AL-Foil |
0.05 m/m Lead-Foil
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150 Line/Inch |
0.12m/m AL-Foil |
0.05 m/m Lead-Foil
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Marking
|
Center Line, Ratio, Focal Distance, Size,
Tube-side, Serial number, etc.
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Thickness of
80-85 Line/Inch
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5 : 1
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6 : 1
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8 : 1
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10 : 1
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12 : 1
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14 : 1
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1.65m/m
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1.90m/m
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2.40m/m
|
2.90m/m
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3.40m/m
|
3.90m/m
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Thickness of
100-103 Line/Inch
|
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6 : 1
|
8 : 1
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10 : 1
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12 : 1
|
14 : 1
|
|
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1.60m/m
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2.00m/m
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2.40m/m
|
2.80m/m
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3.20m/m
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Thickness of
120 Line/Inch
|
|
6 : 1
|
8 : 1
|
10 : 1
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12 : 1
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14 : 1
|
|
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1.30m/m
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1.60m/m
|
1.90m/m
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2.20m/m
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2.50m/m
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Thickness of
150 Line/Inch
|
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6 : 1
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8 : 1
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10 : 1
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12 : 1
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14 : 1
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1.12m/m
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1.36m/m
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1.60m/m
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1.84m/m
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2.08m/m
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Focal Distances
|
Ratio |
Type |
Focal Distance |
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5 :
1 |
Focused |
28"∼48", 49"∼72" |
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5 :
1 |
Parallel |
48"
to infinity |
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6 :
1 |
Focused |
28"∼48", 49"∼72" |
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