	US 12,279,898 B2
	Spread field imaging collimators for radiation-based imaging and methods of using the same
Zhiping Mu, Foster City, CA (US)
Assigned to ARGOSPECT TECHNOLOGIES INC., Foster City, CA (US)
Filed by Argospect Technologies Inc., Foster City, CA (US)
Filed on Aug. 14, 2023, as Appl. No. 18/449,189.
Application 18/449,189 is a division of application No. 17/399,768, filed on Aug. 11, 2021, granted, now 11,723,609.
Claims priority of provisional application 63/168,778, filed on Mar. 31, 2021.
Claims priority of provisional application 63/071,540, filed on Aug. 28, 2020.
Prior Publication US 2023/0389882 A1, Dec. 7, 2023
Int. Cl. A61B 6/06 (2006.01); A61B 6/42 (2024.01)

CPC A61B 6/06 (2013.01) [A61B 6/4266 (2013.01); A61B 6/4291 (2013.01)]

13 Claims

1. A method for image processing, comprising:

obtaining a first image having M sections and each of the M sections having X rows and Y columns of pixels, wherein each of M, X, and Y is an integer greater than 0, and the X rows and Y columns of pixels in each of the M sections are indexed from 1 to (X×Y);

deriving (X×Y) first sub-images from the first image, wherein each first sub-image has M sections, each section of each first sub-image has X rows and Y columns of pixels that are indexed from 1 to (X×Y), the (X×Y) first sub-images are indexed from 1 to (X×Y), wherein the i-th pixel of the j-th section of the i-th first sub-image has a pixel value equal to a pixel value of the i-th pixel of the j-th section of the first image and other pixels of the j-th section of the i-th first sub-image are set to 0, where i traverses from 1 to (X×Y) and j traverses from 1 to M;

providing (X×Y) first projection patterns;

for each of the (X×Y) first sub-images, calculating a first projection by performing convolution of the respective first sub-image with a corresponding one of the first projection patterns, thereby obtaining (X×Y) projected first sub-images; and

summing up the (X×Y) projected first sub-images, thereby obtaining a projection of the first image.