Plates with identical patterns of precisely aligned pinholes constitute lens system which, when rotated about optical axis, produces continuous high resolution image of small energy X-ray or gamma ray source. Camera has applications in radiation treatment and nuclear medicine

Hoover, R. B.

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November 1971	 Brief 71-10439 
NASA TECH BRIEF 
Marshall Space Flight Center
	
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NASA Tech Briefs announce new technology derived from the U.S. space program. They are issued to encourage 
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Multiple-Plate, Multiple-Pinhole Camera for X-ray T-ray Imaging 
A multiple-plate, multiple-pinhole camera pro-
	 resolution by using several thin plates pierced by 
vides the solution to many problems peculiar to
	 small pinholes (see fig.). 
radiation treatment and nuclear medicine. For
	 The novel feature of the new camera i s the 
Image Path 
Through Hole in Case
- 
-
system. The plates, with identical patterns of precisely 
aligned pinholes, constitute a lens system that pro-
duces a high percentage of on-axis rays with a 
minimum of off-axis rays. By rotating this system 
Image about the optical axis, a continuous image of a 
small-energy X-ray or -Y-ray source can be produced 
with excellent resolution. 
Axis of Rotation 
of "Lens" Assembly 
Inside Stationary Housing 
example, one method of treating brain tuniors uses 
radioactive isotope technetium 99. The resulting 
Y-rays radiated from the tumor are too energetic to 
obtain an image by conventional X-ray techniques. 
The multiple-plate camera achieves the necessary
Technology Utilization Officer 
Code A&TS-TU 
Marshall Space Flight Center 
Huntsville, Alabama 35812 
Reference: B71-10439 
Patent status: 
No patent action is contemplated by NASA 
Source: R.B. Hoover

Marshall Space Flight Center

(M FS-20546) 
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Aeronautics and Space Administration. Neither the United States 	 information contained in this document, or warrants that such use 
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A multiple-plate, multiple-pinhole camera for X-ray gamma-ray imaging

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