Source to Image Receiver Distance (SID)

In radiation imaging, the source-image distance (Source-Imaging Distance) is used to reflect the distance between the radiation source and the image receiver.
SID is a very important parameter in radiation imaging. For example, there is a corresponding relationship between SID and the radiation dose of the radiation source, so in some cases, it is necessary to determine the radiation dose required for imaging according to the SID.
In radiographic imaging equipment, generally speaking, the SID is not a fixed value and will be adjusted according to imaging needs. When determining the SID required for an imaging operation according to imaging requirements such as radiation dose or irradiation target, it is necessary to precisely adjust the distance between the radiation source and the image receiver to satisfy the SID.
In order to clarify the value of the SID, the traditional way is to measure the SID by attaching an external measuring device. However, the traditional method requires additional measuring equipment on the radiation imaging equipment, which increases the overall design difficulty and cost of the radiation imaging equipment.

Author: X Ray Machine Accessories