User's Manual

User Manual
Manual No. AMSL/DMR/UM/FD 009
Rev. 00 Effective Date 12.07.2022 Page | 64
mAs, consider starting at 65--75 kVp, 100--160 mA, 2.5--10 mAs for a pediatric
patient. Whenever possible use high kVp techniques and large SID (Source Image
Distance).
Summary:
• Image only when there is a clear medical benefit.
• Image only the indicated area.
• Use the lowest amount of radiation for adequate imaging based on size of the
child (reducing tube output -- kVp and mAs).
• Try to use always short exposure times, large SID values and immobilizing
devices.
Avoid multiple scans and use alternative diagnostic studies (such as ultrasound or
MRI) when possible.
5.5 Correction
Cautions
This procedure should only be done by suitably-trained service engineer
Cautions
If the exposure for the corrected images are collected by wrong exposure
setting, for example, (A). Over-exposure than or under-exposure (B). Foreign
object is put on the surface (C) collimator of Xray tube is not open to the full
field of FPD. It may lead to image artifact.
Cautions
Do not expose to any X-ray during dark image collection.
5.5.1. Collect images
When the program is executed, the corrected images are collected in sequence.
The images with X-ray radiation and without X-ray radiation are collected in
reasonable amounts according to the environment. Next, the offset map (D) and
the gain map (G) are calculated. And use the following algorithm to correct for
raw images.