FujiFilm DR-ID 670, Руководство по эксплуатации

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Z-3
Appendix Z Precautions for Exposure
DR-ID 670 Operation Manual 897N102735
Z.2 Other Precautions
Z.2.1 Precautions for Exposure of a Subject in Relatively
Large Contrast
1
Exposures using a contrast medium may cause artifacts around it.
2 When exposing a subject with any metal objects implanted, artifacts may appear around them.
3 For exposures with objects of large X-ray absorption, such as lead characters and metals for
measurement, artifacts may appear around them. Place such objects outside a subject.
Z.2.2 Precautions for DR System
Generally, when performing a high sensitivity exposure shortly after an exposure that the flat
panel sensor excessively receives direct X-ray, the output image may contain image lags of the
previous exposure. This phenomenon rarely occurs and does not occur insofar as normal sensitivity
exposures are performed.
Exposures at longer intervals can reduce occurrences of this phenomenon. Also observe
precautions as follows.
• Continuous high sensitivity exposures to vertebral body part (chest/lumbar spine) should be
performed at longer intervals than normal exposures.
• A high sensitivity exposure shortly after a high-dose exposure should be performed at sufficiently
long interval.
• When performing high-dose exposures repeatedly, do not use collimation of the radiation field,
lead characters or metals for measurement at the same position.
Z.2.3 Precautions for Assuring the Radiation Field
CAUTIONS
● It is important to read the following before using the DR-ID 670 digital detector clinically.
● Do not make the radiation field larger than the size of the flat panel sensor. Especially when
the high tube voltage is set, the radiation field size should not be larger than the subject
unless necessary.
The DR-ID 670 is a digital X-ray detector designed for use both within and outside of a standard
radiographic bucky. Radiation field can be set up to 14”
5
17” for the DR-ID 601SE/DR-ID 611SE,
17”
5
17” for the DR-ID 602SE/DR-ID 612SE and 24 cm
5
30 cm for the DR-ID 613SE. The DR-ID
601SE/DR-ID 602SE/DR-ID 611SE/DR-ID 612SE/DR-ID 613SE may be used in any situation where
a film cassette may be used. The collimator will open up to 14”
5
17” for the DR-ID 601SE/DR-ID
611SE, 17”
5
17” for the DR-ID 602SE/DR-ID 612SE and 24 cm
5
30 cm for the DR-ID 613SE,
when the DR-ID 670 cassette is inserted in the bucky tray of X-ray systems with positive beam
limitation (PBL).
Follow the X-ray system manufacturer’s instructions to assure the indicated field size matches and
does not exceed the actual radiation field size for the available range of SIDs.
Z.2.4 Precautions Related to Continuous Operation
If you plan to continuously run the system for over 24 hours, perform post-operation check, and
then restart the system.
Otherwise, calibration will not be performed normally, and image quality cannot be guaranteed as a
result.