Abstract
This report presents an automatic procedure that determines the orientation of computed radiography (CR) chest images and rotates them to a standard position to be viewed by radiologists. As an input, CR images of a normalized size of 1,000 × 1,000 or 2,000 × 2,000 pixels are used. The analysis is performed in three steps. First, the orientation of the spine within the image is determined. Then, a function searches for upper extremities and the subdiaphragm. Finally, the lungs are extracted and their areas are compared. This indicates whether the image needs to be y-axis flipped. These three steps set the value of three parameters on the basis of which the final rotation angle is determined. The procedure has been implemented in the clinics at UCLA. The rate of correctly rotated images is 95.4%.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
Taira R, Huang HK: A picture archiving and communication system module for radiology. Comput Methods Programs Biomed 30:229–247, 1989
Huang HK: Image storage, transmission, and manipulation. J Minimally Invasive Ther 1:85–92, 1991
Huang HK, Taira R: PACS infrastructure design. AJR Am J Roentgenol 158:743–749, 1992
McNitt-Gray M, Pietka E, Huang HK: Image processing for PACS. Invest Radiol (in press)
Pietka E, McNitt-Gray M, Kuo ML, et al: Computer assisted phalangeal analysis in skeletal age assessment. IEEE Trans Med Imaging 10:616–620, 1991
McNitt-Gray M, Eldredge S, Tagawa J, et al: Automatic removal of unexposed background in digital radiographs. Proc SPIE 1653:94–102, 1992
Author information
Authors and Affiliations
Additional information
Supported by US Public Health Service grants R01 CA 39063 and P01 CA 51198, awarded by the National Cancer Institute, Department of Health and Human Services.
Reprinted with permission from Medical Imaging VI: Picture Archiving and Communications Systems, Society of Photo-Optical Instrumentation Engineers, 1992.
Rights and permissions
About this article
Cite this article
Pietka, E., Huang, H.K. Orientation correction for chest images. J Digit Imaging 5, 185–189 (1992). https://doi.org/10.1007/BF03167768
Issue Date:
DOI: https://doi.org/10.1007/BF03167768