concept
information model
A patient (Patient) can do multiple examinations (Studies);
A study (Study) contains a series of medical images, that is, a series (Series);
An image will be divided into multiple file storage, namely instance (Instance).
For example, a standard PET-CT examination (Study) will perform two series (Series) of CT and PET, which usually correspond to two-dimensional/three-dimensional/four-dimensional images of the human body. Each image will be divided into multiple file storage (Instance), that is, we see a single file with the suffix of DCM containing a single image.
In general, a DICOM instance (Instance) can be seen as a combination of a two-dimensional image and a structure that stores patient meta-information (demographic information, such as name, age, height, weight, etc.).
Patient meta information is usually an array containing the corresponding values of DICOM tags, each tag is represented by two hexadecimal numbers.
The inspection (Study), sequence (Series) and image (Instance) of each level are required to be globally unique.
API
Retrieve（WADO-RS）
WADO (Web Access to DICOM Objects), the technology of obtaining DICOM persistent objects through the Web is a part of the DICOM standard and one of the key technologies for realizing computer-aided diagnosis and regional medical treatment.
Development schedule: WADO -URI-> WADO-WS-> WADO-RS
Search（QIDO-RS）
Store（STOW-RS）
Worklist（UPS-RS）
appendix
Standard specification
http://www.dicomstandard.org/current/