Table of Contents
Advertisement
[7] When the scan is complete (both the mechanical "end of scan" and the optical "end of scan"), both areas report to the MCPU that they are done. The MCPU then
directs the Erase Plate sequence.
Image Processing
[1] When the software on the PC detects that a raw image has come from the MCPU, it:
(a) Puts the data into a prepared RAW_Image file
(b) Checks the Cassette ID
(c) Locates the matching patient record for i. ??Can't decides if I need to talk about what happens if it can't find a matching record since this is the "normal
sequence".
Note
The software first looks in its own data base for the patient record, if it is not there, it checks each of the other CR 800 Systems in the Cluster.
[2] When the patient record is matched, the PC begins the image processing of the raw image:
(a) First it looks at the body part projection information so that it knows what processing to do.
(b) Next it starts working with the IPL. ??
(c) A sub-sampled (by 4 meaning 1/4 the image size) is created and sent to the ?? which creates the Ptone look up table (LUT)
(d) It applies the Ptone LUT to the subsampled image.
(e) Creates a .JPG copy of the sub sample by 4 image. This is the image that the Operator sees on the TouchScreen Monitor and that is enhanced by the
Operator.
(f) Next a .JPG copy of the image is created as a thumbnail (approximately 70 x 70 pixels). This is the image that is displayed on the exam screen. All the
Thumbnails, in the system ?? database?? are displayed on the exam screen, whether waiting for QA, orphans, or fails).
Note
While the full 10 mg raw images reside on the CR 800 SQL database, there is no software in the system to permit viewing the full raw image. The subsampled-by-4
image in JPG format can be viewed and the processing parameters can be removed so that the subsampled-by-4 raw image can be viewed. If there is some reason
to do so, TSC can down load the full raw image using special Software (or Adobe Photoshop)
[3] The Operator touches the thumbnail and brings up the subsample by 4 image, makes changes and corrections and accepts the subsample image. When the
image is accepted, the software applies all the same processing to the full resolution image (the processed image).
[4] The software then hands the processed image to another piece of software that converts it to a DICOM file (adds DICOM information). From there, it is handed
off??what do I say here?? to the MIM for delivery to the network.
1234563 – 12/12/94
Image Acquisition and Processing
12–65
Advertisement
Table of Contents
