Megavoltage portal films using computed radiographic imaging with photostimulable phosphors
Conventional portal films taken with high-energy x rays are severely impaired by poor image quality, and many attempts have been made to overcome this problem. A new technology, computed radiographic imaging, has been investigated as a means of producing images taken with 6-and 10-MV x rays. The computed radiographic imaging (CRI) system is based on the principle of laser-stimulated luminescence induced in an image receptor plate exposed to ionizing radiation, and direct conversion of the light into digital form. Image processing using contrast enhancement and unsharp masking yields images at least as good as the best portal films obtainable with conventional commercial radiotherapy cassettes. Additionally, CRI offers advantages of reduced image size and digital storage. The system is capable of producing normal film densities over an extremely wide range of exposure.
- Research Organization:
- Ochsner Medical Institutions, New Orleans, LA
- OSTI ID:
- 6023898
- Journal Information:
- Med. Phys.; (United States), Vol. 14:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COMPUTERIZED TOMOGRAPHY
QUALITY CONTROL
CONTRAST MEDIA
IMAGE PROCESSING
IMAGES
IONIZING RADIATIONS
LASERS
LUMINESCENCE
X RADIATION
CONTROL
DIAGNOSTIC TECHNIQUES
ELECTROMAGNETIC RADIATION
PROCESSING
RADIATIONS
TOMOGRAPHY
550602* - Medicine- External Radiation in Diagnostics- (1980-)