Fluke 57-440 User Manual

Nuclear Associates 57-440

CLEAR-Pb® Podiatry X-Ray Compensation Filter System

March 2005
Manual No. 57-440-1 Rev. 2
©2004, 2005 Fluke Corporation, All rights reserved. Printed in U.S.A.
All product names are trademarks of their respective companies

Users Manual

Fluke Biomedical

Radiation Management Services

6045 Cochran Road
Cleveland, Ohio 44139

440.498.2564

www.flukebiomedical.com/rms

Table of Contents

Section 1: General Information................................................................................... 1-1

1.1 Introduction .................................................................................................. 1-1

1.2 Applications and Specifications ................................................................... 1-1

Section 2: Usage .......................................................................................................... 2-1

2.1 Filter Holder and Mounting Instructions ....................................................... 2-1

2.2 Filter Positioning .......................................................................................... 2-3

i

(Blank Page)

General Information

Introduction

1

Section 1

General Information

1.1 Introduction

CLEAR-Pb Compensation X-Ray Filters are made of lead-plastic material that is 30% lead by weight.
Since lead is an efficient absorber of x-rays, the filters will attenuate the x-ray beam. By varying the
shape and thickness of the filters, many combinations of filtering action can be achieved...from almost
complete attenuation to full penetration.

CLEAR-Pb Podiatry Filters are translucent and lightweight. By means of our "Quick-Stik" system of
magnetic strips, the filters can be held firmly in place or repositioned instantly, You can see and/or adjust
the area of filter coverage as necessary by observing the light shadow projected on the region being
radiographed. Last minute positioning checks of the patient, x-ray collimator and filters are possible.
Selected beam shaping has never been so simple and effective.

CLEAR-Pb Filters should be used with a rare-earth film screen combination to improve image quality.
Consult your film manufacturer for the proper combination. CLEAR-Pb may also be used with positive
Polaroid instant radiographic film.

1.2 Applications and Specifications

Model #

Applications

Length x Width

Thickness

Configuration

Podiatry Filter Filter Holder

57-440 -

PA Foot ­PA Foot

Weight-Bearing
LAT Foot ­LAT Foot

Weight-Bearing

6.5” L x 2” W 7” L x 3” W

5/32” 1/16”

-

-

1-1

Nuclear Associates 57-440

Operators Manual

(Blank Page)

Usage

Filter Holder and Mounting Instructions

Section 2

Usage

2.1 Filter Holder and Mounting Instructions

A. For conventional, square collimator mounting: Attach two strips of 1" wide tape fastener to

collimator housing outside the field of view. See Figure 1-1. The filter holder should be oriented
perpendicular to the axis of the foot. The filter attaches to the filter holder via the "Quick Stik"
magnetic mounting system.

Figure 1-1. Mounting to a Square Collimator

B. For older model beam-restricting cones, the 1" wide tape fastener should be applied at opposite,

ends of the cone, perpendicular to the axis of the foot. The filter then attaches to the filter holder in
the same manner as conventional collimators. See Figure 1- 2.

Tape Fastener

Collimator

Tape Fastener on Back
of Holder

Filter Holder

2

2-1

Nuclear Associates 57-440

Operators Manual

Fold Tape Fastener
Over Outer Edges

Beam-Restricting Cone

View of Bottom

Filter Holder

Figure 1-2. Mounting to a Beam–Restricting Cone

Filter

2-2

2.2 Filter Positioning

Usage

Filter Positioning

2

NOTE

This section contains a detailed description of filter
positioning. Please read it thoroughly before
continuing.

A. A. AP Foot 40" F.F.D. When performing a single-exposure AP radiograph of the foot, the thin

filtration portion of the filter should begin at the proximal end of the metatarsal bones. The thick
edge of the filter should extend beyond the terminal phalanges (see Figure 2-1).

B. Technique should be increased in order to image the tarsal bones; the

attenuation of the filter will compensate for the exposure in order to prevent the terminal phalanges
from becoming overexposed. The entire foot ran be imaged with one exposure.

Figure 2-1. AP Filter Orientation

Thick Edge of Filter

NOTE: Thin Edge of Filter
Over Metatarsal Area

Shows Area of Filter
Coverage

2-3

Nuclear Associates 57-440

Operators Manual

C. When performing a single-exposure lateral radiograph of the foot, the thin filtration portion of the

filter should begin at the proximal end of the metatarsal bones. The thick edge of the filter should
extend beyond the terminal phalanges (see Figure 2-2).

Technique should be increased in order to image the tarsal bones; the attenuation of the filter will

compensate for the less-dense terminal phalanges.

D. For AP and lateral weight-bearing views, the positioning is the same as for conventional views.

Shows Area of Filter
Coverage

Thick Edge of Filter

Figure 2-2. Lateral Filter Orientation

NOTE: Thin Edge of Filter Over
Proximal Metatarsal Area

2-4

(Blank Page)

Fluke Corporation

Radiation Management Services

6045 Cochran Road
Cleveland, Ohio 44139

440.498.2564

www.flukebiomedical.com/rms