Application of longitudinal magnification effect to magnification stereoscopic angiography. A new method of cerebral angiography
A new method of stereoscopic cerebral angiography was developed which employs 2X radiographic magnification. In order to obtain the same depth perception in the object as with conventional contact stereoscopic angiography, one can make the x-ray exposures at two focal spot positions which are separated by only 1 inch, whereas the contact technique requires a separation of 4 inches. The smaller distance is possible because, with 2X magnification, the transverse detail in the object is magnified by a factor of two, but the longitudinal detail, which is related to the stereo effect, is magnified by a factor of four, due to the longitudinal magnification effect. The small focal spot separation results in advantages such as improved stereoscopic image detail, better image quality, and low radiation exposure to the patient.
- Research Organization:
- Franklin McLean Memorial Research Inst., Chicago, IL (USA)
- OSTI ID:
- 7226237
- Report Number(s):
- CONF-761153-2
- Country of Publication:
- United States
- Language:
- English
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63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BEAM OPTICS
BIOMEDICAL RADIOGRAPHY
BLOOD VESSELS
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BRAIN
CARDIOVASCULAR SYSTEM
CENTRAL NERVOUS SYSTEM
CONTRAST MEDIA
DIAGNOSTIC TECHNIQUES
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