<*n style="color:#ff0000; font-size:16pt">深圳湾边贸易公司原装进口美国Gammex 156*模体价格优惠！

<*n style="color:#ff0000; font-size:16pt">厂家：Gammex, Inc.

<*n style="color:#ff0000"><*n style="font-size:16pt">品名：Mammographic<*n style="font-size:16pt">Accreditation Pha*m Model 156

<*n style="color:#ff0000"><*n style="font-size:16pt">型号：Gammex 156,   Gammex Model 156

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尺寸：

<*n style="font-size:11.5pt"><*n style="font-size:11.5pt"> 

Dimensi*

Pha*m Body
Material . . . . . . . Acrylic
Pha*m Dimensi* . . . . . . . 4.5x10.2x10.8 cm (HWD) (1.75x4x4.25 in)

Acrylic Base . . . . . . . . . . .  . . . 3.3 cm (1.3 in) thick
Cover . . . . . . . . . .  . . . . . . . . . .0.3 cm (0.12 in) thick
Acrylic Disk . . . . . . . . . . . . . . . 4 mm thick x 1 c*ameter
Test Objects . . . . . . . . . . . . . . .Nylon fibrils (1.56, 1.12, 0.89, 0.75, 0.54 and
                                                   0.40 mm nylon fibers)

Simulated microcalcificati*.(0.54, 0.40, 0.32, 0.24 and 0.16 mm specks)

Tumor-like masses . . . . . . . . .(2.00, l.00, 0.75, 0.50, 0.25 and 0.16 mm specks)
Included is a film, which is a contact image of the wax insert of your Gammex 156

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产品介绍：

The Mammographic Accreditation Pha*m Model 156 is
designed to test the performance of a mammographic
system by evaluation of the system’s ability to image
*all structures similar to those found clinically. Objects
within the pha*m were designed to simulate micro-calcificati*,
fibrous structures in ducts, and tumor-like masses,
*all structures that are important in the early detection
of breast cancer. Test objects within the pha*m
range in size from those that should be visible on any system
to objects that will be difficult to see even on the best
mammographic systems.
Storage and Handling
Store the Mammographic Accreditation Pha*m Model
156 in a cool dry area *oiding temperature extreme such
as intense heat and direct sunlight, or freezing temperatures.
Impact stres*ay cause breakage.
3
Product Description
The Mammographic Pha*m i*ade up of a wax block
containing 16 various sets of test objects, a 3.3 cm (1.3
in.) thick acrylic base, a tray for placeme*f the wax
block, and a 0.3 cm (0.12 in.) thick cover. All of this
together approximates a 4.2 cm compressed breast. Five
groups of simulated micro-calcificati*, six different size
nylon fibers simulate fibrous structures, and five different
size tumor-like masses are included in the wax insert.
Figure 1 lists the sizes of the test objects and their *ition
in relatio*the notched corner of the wax block.
2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
1
Figure 1: Location of the test objects in the wax insert.
Note: Numbers are for reference only.
4
Region Materials
1. 1.56 mm nylon fiber
2. 1.12 mm nylon fiber
3. 0.89 mm nylon fiber
4. 0.75 mm nylon fiber
5. 0.54 mm nylon fiber
6. 0.40 mm nylon fiber
7. 0.54 mm simulated micro-calcification
8. 0.40 mm simulated micro-calcification
9. 0.32 mm simulated micro-calcification
10. 0.24 mm simulated micro-calcification
11. 0.16 mm simulated micro-calcification
12. 2.00 mm thick tumor-like mass
13. 1.00 mm thick tumor-like mass
14. 0.75 mm thick tumor-like mass
15. 0.50 mm thick tumor-like mass
16. 0.25 mm thick tumor-like mass
5
A 4 mm thick, 10 m*ameter acrylic disk is also provided with
each pha*m. The disk is used to establish and monitor a density
difference with respect to your facility’s operating level. It
should be placed o*p of the pha*m in a c*istent location
in the image area so it does not obscure details in the pha*m
and where it can not cast a shadow on any portion of the AEC
detector. According to the ACR Mammography QC Manual, a
suitable location is between and slightly below the first and second
largest fibers.
Using the Pha*m*
Set Up
1. Center the pha*m on the image receptor surface with the
nipple indent marker *itioned away from the chest wall, just
as the nipple of the patie*squo;s breast, and the chest wall edge
of the pha*m aligned with the wall side of the image receptor.
3. Select the mammographic machine settings appropriate for a
4.2 cm compressed breast. If the phototimer is used, set the
phototimer to the center *ition under the wax portion of the
pha*m.
4. Make an ex*ure. Process the film. If using a digital mammographic
system, follow the manufacturer’s image processing
and display requirements.
Image Evaluation
The 156 Map conforms to the requirements of the American
College of Radiology for use in the ACR Accreditation Program.
The Pha*m may be used to evaluate both screen/film and digital
images. ** Facilitie*rticipating in the ACR Accreditation
Program will use and evaluate the pha*m images in accordance
with that program. Facilities following other national or
regional guidelines should refer to those standa*.
1. Background optical should be greater than 1.40 O.D. for
screen/film images. The density difference between the
acrylic disk and the background should be at least 0.4.
Once the density difference is established as an operat
ing level, subsequen*nsity difference measurements
should be within +/- 0.05 O.D.
2. The target mean glandular dose required to achieve the
optical density is as tabulated in the ACR Mammography
Quality Assurance manual for different anode/filter com
binati*. Your alternative national or regional stan
da*.
3. Pha*m images should be read under optimal condi
ti*. Use of a X2 or greater magnifyin*lass or digital
image manipulatio*ols is recommended. Viewbox
luminance an ambient light levels should be optimized.
4. The ACR requires that the reader must be able to see all
of the 0.75 mm fiber, all of the 0.75 mm mass and all six
of the 0.32 mm specks. A*any systems can surpass
thi*inimum, attentio*degradation over time is as
important a*eeting the minimum requirement.
Failure to meet the minimum image quality requirements set
either internally or by your accreditation or regulatory agency
should prompt investigation and corrective action.
You should c*ult with a medical physicist or engineer who
specializes in mammography and/or diagnostic radiology.
Following the correction, the system should be retested and the
new results documented.
*Thi*anual provides a recommended use of the 156 pha*m for routine
quality assurance in additio*, or in lieu of any other program.
**At the time of this writing, testing of the full field digital mammography systems
in the United State*ust follow the manufacturer’s quality co*ol
manual.

源自：深圳市湾边贸易有限公司
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