Signal normalization in surface-coil MR imaging.
Year: 1990
Type: article
Abstract: Flat surface coils show signal loss with increasing distance from the coil plane. With standard windowing settings, detail within the subcutaneous fat and other superficial tissues may be obscured. Postprocessing techniques have been previ-ously shown to improve the signal uniformity in surface-coil images [1, 2]. Despite the potential benefits of such methods, intensity correction also has the potential to introduce artifacts into the image or cause a loss of diagnostic information. We therefore performed a blinded study to determine the benefits and drawbacks of image normalization. Materials and Methods A simplified normalization technique was employed. The intensity of each voxel in the image was multiplied by a conversion factor F(x,y) = [r(x,y) + b]8 /C, where r(x,y) =distance from the coil center, a = an exponential factor, b = a shape factor, and c = a scaling
Source: PubMed Central
Authors: B K Wallner, R R Edelman, R L Bajakian, J Kleefield, D J Atkinson, H P Mattle
Institution: Beth Israel Deaconess Medical Center
Language: English
Subfield: Radiology, Nuclear Medicine and Imaging
Field: Medicine
Domain: Health Sciences
Open Access status: green
OpenAlex ID: W2183128914