Paper
29 December 1982 Density Resolution Artifacts Encountered When Scanning Infant Heads With X-Ray Computed Tomography (CT)
Joseph R. Thompson, Robert J. M oore, David B. Hinshaw Jr., Anton N. Hasso
Author Affiliations +
Proceedings Volume 0347, Application of Optical Instrumentation in Medicine X; (1982) https://doi.org/10.1117/12.933826
Event: Application of Optical Instrumentation in Medicine X, 1982, New Orleans, United States
Abstract
Density resolution the accuracy of CT numbers) is generally recognized by radiologists w'ao interpret Children's, CT to be very poor. A CT scanning phantom was made. in order to document the brain attenuation inaccuracies which do occur and also to derive normal brain attenuation values for varying sized heads, given. the skull diameters and thicknesses. In scanning' this phantom, other factors, some of equal importance, to small head size, were found to affect the Hounsfield numbers of brain. The phantom was scanned in order to determine the magnitude of these specific factors, using the GE 8800 model scanner. After head size (412 to 25, H), the variables of the head support (up to 15 H) and centering within the field of view (6-23 H) were of similar importance, for small heads. Kilovoltage, software, and machine drift were less, important, although only kVp settings, of 105 and 120 were employed. Manufacturers may improve CT number accuracy if they recognize the relative, magnitude of the various factors which alter measured attenuation.
© (1982) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Joseph R. Thompson, Robert J. M oore, David B. Hinshaw Jr., and Anton N. Hasso "Density Resolution Artifacts Encountered When Scanning Infant Heads With X-Ray Computed Tomography (CT)", Proc. SPIE 0347, Application of Optical Instrumentation in Medicine X, (29 December 1982); https://doi.org/10.1117/12.933826
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KEYWORDS
Head

Signal attenuation

Brain

Skull

X-ray computed tomography

Neuroimaging

Aluminum

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