Patent Number: 
Section: claims

1. A method of manufacturing a grid for selective transmission of electromagnetic radiation, the method comprising:providing a structural element that has minimum structure dimensios and comprises a plurality of particles of a first radiation-absorbing material, wherein at least 90% of all particles of the plurality of particles have a maximum particle size larger than 10% of the minimum structure dimensions, further wherein the particles are sintered together and pores are present between neighbouring particles;inserting a liquid second material into the pores, wherein the second material has a melting temperature lower than a melting temperature of the first radiation-absorbing material; andsolidifying the second material. 2. The method according to claim 1, wherein the liquid second material comprises a radiation-absorbing material. 3. The method according to claim 1, wherein the particles of the first radiation-absorbing material are sintered together by selective laser sintering. 4. The method according to claim 1, wherein the liquid second material is inserted into the pores by dipping the structural element into a bath of liquefied material. 5. The method according to claim 1, wherein the liquid second material is liquefied by melting. 6. A grid for selective transmission of electromagnetic radiation comprising a structural element that has minimum structure dimensions and comprises a plurality of particles of a first radiation-absorbing material, wherein at least 90% of all particles of the plurality of particles are larger than 10% of the minimum structure dimensions, further wherein the particles are sintered together such that pores are present between neighbouring particles and wherein the pores are at least partially filled with a second solid material, and further wherein the second material has a melting temperature lower than a melting temperature of the first radiation-absorbing material. 7. The grid according to claim 6, wherein the second material is a radiation-absorbing material. 8. The grid according to claim 6, wherein the second material is a metal. 9. The grid of according to claim 6, wherein the second material is selected out of a group consisting of of silver, lead, copper and alloys thereof. 10. The grid of according to claim 6, wherein the first radiation-absorbing material is selected out of a group comprising molybdenum and tungsten. 11. A medical imaging device comprising a grid according to claim 6.