FujiFilm CR-IR 355RU, Operation Manual

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Z-3
Pr
ecautions for Exposur
e
Z
FCR XC-1 Operation Manual
First Edtion 11.2005 897N0565
Precautions to Take in Each Mode
This section describes some precautions that must be followed when making radiographic exposures in
each of the following modes: Auto mode, Semi-auto mode, Semi-X mode, and Fix Mode.
1 Precautions for Exposure
in the AUTO MODE
In the Auto mode, radiographic images that
interfere with image reading are obtained in some
cases due to variations in multileaf collimator
settings on the X-ray exposure unit and/or the
effects of scatter rays. If you encounter such
cases, please contact your local authorized
distributor for consultation and advice, and make
radiographic exposures in a different mode such
as the Semi-auto mode or the Fix mode.
Here are precautions to take in order to obtain stable
image quality in the Auto mode:
1. Radiation Field and IP Split Pattern Recognition .... (1.1)
2. Depiction of the Cervical Region ....................(1.2)
3. Depiction of HIP JOINT AXL - 2 .....................(1.3)
4. Cautions for “PANTOMO” X-ray Exposures
Using a 10”×12” Cassette ..............................(1.4)
5. EDR Image Data Analysis ..............................(1.5)
1.1 Radiation Field and IP Split Pattern
Recognition
• Be sure that the center (25×25mm) of the IP is in
the radiation field. If the IP is split for multiple
exposures, each center of the split portions must
be covered by the radiation field.
IP center: 25mm×25mm area (black
rectangles in examples above)
located in the center of the IP
Center of the split portion: 25mm×25mm area (black
rectangles in examples above) located in the
center of each split portion
• Do not set the radiation field extremely small.
Be sure to expose X-rays on one thirds or more
of the length of each side of the IP.
• Be sure that each side of the radiation field does
not overlap with the contrast medium.
Error will occur if they overlap each other.
This subsection explains precautions to be
exercised regarding “Radiation Field and IP Split
Pattern Recognition” processing (hereafter
referred to as PRIEF) which is performed when
you make radiographic exposures in the Auto
mode.
The “S” in PRIEF4S and PRIEF1S is a symbol to
signify that IP-split recognition is possible. There
are the following four split-IP exposure patterns:
Full-IP exposure Half-split IP (vertical) Quarter-split IP Half-split IP (horizontal)
* When making multiple exposures on a split IP, a split
portion(s) may be left unexposed.
Guidance as to which to use: PRIEF4S or PRIEF1S
Table Z-1 shows the relationships among
anatomical regions to be radiographed,
radiographic exposure methods, PRIEF4S and
PRIEF1S.
Explanations on PRIEF4S and PRIEF1S are also
provided along with precautions to take with them.
[Table. Z-1] At-a-glance guide to availability of
PRIEF4S/PRIEF1S for each
anatomical region/exposure method
Plain
Contrast
Medium
Tomography
Head 4S 4S
4S (1 for
pantomography)
Neck 4S 4S 1S
Chest 4S
4S (1 for
esophagus)
1
Abdomen 4S
4S (1S for
stomach and
intestines)
1
Pelvis 4S 4S 1
Upper extremity 4S 4S 1
Lower extremity 4S 4S 1