Reconstructing the CT number array from gray-level images and its application in PACS

Xu Chen; Tian-ge Zhuang; Wei Wu

doi:10.1117/12.435498

7 August 2001 Reconstructing the CT number array from gray-level images and its application in PACS

Xu Chen, Tian-ge Zhuang, Wei Wu

Proceedings Volume 4323, Medical Imaging 2001: PACS and Integrated Medical Information Systems: Design and Evaluation; (2001) https://doi.org/10.1117/12.435498
Event: Medical Imaging 2001, 2001, San Diego, CA, United States

Abstract

Although DICOM compliant computed tomography has been prevailing in medical fields nowadays, there are some incompliant ones, from which we could hardly get the raw data and make an apropos interpretation due to the proprietary image format. Under such condition, one usually uses frame grabbers to capture CT images, the results of which could not be freely adjusted by radiologists as the original CT number array could. To alleviate the inflexibility, a new method is presented in this paper to reconstruct the array of CT number from several gray-level images acquired under different window settings. Its feasibility is investigated and a few tips are put forward to correct the errors caused respectively by 'Border Effect' and some hardware problems. The accuracy analysis proves it a good substitution for original CT number array acquisition. And this method has already been successfully used in our newly developing PACS and accepted by the radiologists in clinical use.

Citation Download Citation

Xu Chen, Tian-ge Zhuang, and Wei Wu "Reconstructing the CT number array from gray-level images and its application in PACS", Proc. SPIE 4323, Medical Imaging 2001: PACS and Integrated Medical Information Systems: Design and Evaluation, (7 August 2001); https://doi.org/10.1117/12.435498

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KEYWORDS

Computed tomography

Picture Archiving and Communication System

Frame grabbers

Scanners

Brain

CT reconstruction

Error analysis

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