Patent Number: 
Section: claims

1. An antiscattering grid comprising:a plurality of strips absorbing radiation distributed on the grid;the distance separating two successive strips among the plurality of strips is not constant;the strips extending transversely within the thickness of the grid;the strips being separated from each other by and bonded to inter-strip members that are substantially transparent to the radiation; andthree or more successive strips among the plurality of strips define a pattern that is repeated proceeding along an axis of the antiscattering grid, the axis oriented to cross the three or more successive strips. 2. The grid according to claim 1 wherein: three successive strips among the plurality of strips define the pattern that is repeated;the first and second strips of the pattern being spaced a first distance; andthe second and third strips of the pattern being spaced a second distance. 3. The grid according to claim 1 comprising:five successive strips among the plurality of strips define the pattern that is repeated;three successive strips of the pattern being spaced a first distance;the other pairs of successive strips in the pattern being spaced a second distance. 4. The grid according to claim 1 comprising:successive strips located in a central area of the grid are spaced a first distance; andthe successive strips located in the peripheral areas of the grid are spaced a second distance. 5. The grid according to claim 1 comprising:the strips among the plurality of strips are spaced at multiple distances. 6. The grid according to claim 5 comprising the multiple distances are distributed by increasing distance from the center of the grid to a periphery of the grid. 7. The grid according to claim 1 wherein the grid is a 1D grid. 8. The grid according to claim 1 wherein the grid is a 2D grid. 9. The grid according to claim 1 comprising the strips of the plurality of strips extend along a plurality of parallel planes. 10. The grid according to claim 1 comprising the strips of the plurality of strips extend in a plurality of planes, the planes of the plurality of planes intersecting along the same straight line. 11. The grid according to claim 1 wherein the distance separating two successive strips among the plurality of strips is a discrete number of pitches. 12. The grid according to claim 11 wherein the discrete number of pitches is different pitches distributed over the grid. 13. The grid according to claim 12 wherein the distribution is in distinct regions of the grid. 14. The grid according to claim 13 wherein:smaller pitches being in the region of the grid closer to a central line; andhigher pitches being present in a periphery of the grid. 15. The grid according to claim 1 wherein the distance separating two successive strips among the plurality of strips has two different pitches. 16. The grid according to claim 15 wherein the two different pitches are distributed over the grid. 17. The grid according to claim 16 wherein the distribution is in distinct regions of the grid. 18. The grid according to claim 17 wherein:smaller pitches being in the region of the grid closer to a central line; andhigher pitches being present in a periphery of the grid. 19. The grid according to claim 15 wherein the two different pitches are distributed alternately over the grid. 20. The grid according to claim 1 wherein the inter-strip members are made of a material comprising at least one of polymer and aluminum. 21. The grid according to claim 1 wherein:a first and a second strip of the pattern being spaced a first distance;at least two other successive strips of the three or more successive strips being spaced a second distance different from the first distance. 22. A radiation imaging apparatus comprising;means for providing a source of emitted radiation;means for providing an image receiver or a means for detecting the emitted radiation;an antiscattering grid located between the means for providing a source of radiation and the means for providing an image receiver or a means for detecting;the antiscattering grid comprising:a plurality of strips absorbing radiation distributed on the grid;the distance separating two successive strips among the plurality of strips is not constant;the strips extending transversely within the thickness of the grid;the strips being separated from each other by and bonded to inter-strip members that are substantially transparent to the radiation; andthree or more successive strips among the plurality of strips define a pattern that is repeated proceeding along an axis of the antiscattering grid, the axis oriented to cross the three or more successive strips. 23. A method for manufacturing an antiscattering grid comprising:forming an assembly of a plurality of strips of material substantially absorbing radiation and a substrate of flexible material substantially transparent to radiation;folding the substrate assembly in an accordion fashion to obtain a stack of grid elements superposed on top of each other, the grid elements composed of the strips and inter-strip members, the inter-strip members defined by the folded substrate disposed between two consecutive strips; andfixing the elements thus superposed;wherein the width of the inter-strip members forming the grid elements is not constant, three of more successive strips among the plurality of strips and define a repeating pattern that proceeds along an axis of the antiscattering grid, the axis oriented to cross the three or more successive strips of the plurality. 24. The method according to claim 23 wherein the superposing comprises:defining the repeating pattern by:disposing a first and a second strip on the substrate spaced a first distance; anddisposing the second and a third strip on the substrate spaced a second distance different from the first distance. 25. The method according to claim 23 wherein the superposing comprises:defining the repeating pattern by:disposing three successive strips on the substrate spaced a first distance; anddisposing two successive strips on the substrate spaced a second distance different from the first distance. 26. The method according to claim 23 wherein the forming an assembly comprises:bonding strips of the plurality of strips alternately on one face of substrate and then on an opposing face thereof at varying distances.