Patent Number: 
Section: claims

1. Gamma camera detection head comprising: elementary semiconductor detectors, approximately identical and placed adjacent to each other to form a detection plane; and  a collimator placed in front of the detection plane, including a number of ducts configured to carry gamma radiation, each duct approximately identical to each other and laid out in a repetition pattern,  wherein a shape of the elementary detectors and the repetition pattern are rectangular in the detection plane and a length and a width of the repetition pattern are sub-multiples of a length and a width of the elementary detectors. 2. Detection head according to  claim 1 , wherein at least one of the shape of the elementary detectors and the shape of the repetition pattern is square in the detection plane. claim 1 3. Detection head according to  claim 2 , wherein the width and length of the repetition pattern is equal to one third of the width and length of the individual detectors. claim 2 4. Detection head according to  claim 2 , wherein the width and length of the repetition pattern is equal to half the width and length of the individual detectors. claim 2 5. Gamma camera collimator comprising: a number of ducts configured to carry gamma radiation to elementary detectors, said ducts approximately identical with and parallel to each other and laid out in a repetition pattern, the ducts having a square transverse cross-section and having a length and a width of the repetition pattern which are sub-multiples of a length and a width of the elementary detectors. 6. Gamma camera comprising a collimator according to  claim 5 . claim 5 7. Gamma camera comprising a detection head according to one of  claims 1  to  4 . claims 1 4