MTR221/A - MTR221/A DHHS
MANUALE ISTRUZIONI / INSTRUCTION MANUAL
Modello/Model R221/A - R221/A DHHS
C
OMPLIANCE
V
ERIFICATION
24
R22
1/A
- R221
/A DHHS -
C
omplia
nce V
erification
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c) Plot the exposure readings (log scale) versus the total added filtration thickness on semi-log
paper; see the sample hereunder.
d) Verify that HLV values in the useful beam for the above specific tube potential is not less
than the values shown in
Table - Minimum Filtration Requirement - Beam Quality (HVL)
.
V
ISUAL
D
EFINITION
OF
X-
RAY
V
ERSUS
L
IGHT
F
IELD
Chapter -
C
OLLIMATOR
C
ALIBRATION
- paragraph -
Light-Field to X-ray Field Alignment
.
F
IELD
S
IZE
I
NDICATION
Chapter-
A
DJUSTMENTS
, paragraph
Field Size Indication.
C
ROSSHAIR
A
LIGNMENT
C
HAPTER
- A
DJUSTMENTS
,
PARAGRAPH
C
ROSSHAIR
A
LIGNMENT
.
L
IGHT
F
IELD
I
LLUMINATION
I
NTENSITY
a) When a light field simulating the X-Ray field is used the illumination provided at 100 cm.
cannot be less than: 160 lux [(21 CFR 1020.31 (d) (2) (ii)].
b) Place the Focus of the X-Ray tube at 100 cm. from the table top were the light field as been
projected. Open the collimator's shutters to assure that each quadrant of the light field is
larger than the measuring area of the photometer.
c) Check that the voltage specified by the manufacturer is applied to the lamp, make certain
that all surfaces in the light beam are clean and unobstructed.
d) Place a photometer capable of reading up to 160 lux in the centre of each of the four
quadrants of the light field.
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erale
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Содержание MTR 221/A
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