Patient positioning apparatus and a medical imaging apparatus comprising the patient positioning apparatus

1. A patient positioning apparatus, comprising:

a positioning table; a transfer plate, which is arranged on the positioning table so as to be moveable relative to the positioning table; and

a positioning unit for a positioning of a surgical head securing unit on the transfer plate,

wherein the positioning unit exhibits a joint unit with a first rotational joint unit, and

wherein the first rotational joint unit exhibits a predetermined stop position for a rotational movement, and

wherein the joint unit exhibits a belt, by means of which a rotational movement of the first rotational joint unit is transferred onto the second rotational joint unit.

2. The patient positioning apparatus as claimed in claim 1 , wherein the first rotational joint unit exhibits a stop element, which prevents a rotational movement of the first rotational joint unit beyond the predetermined stop position.

3. The patient positioning apparatus as claimed in claim 1 , wherein that the first rotational joint unit is arranged secured to the transfer plate.

4. The patient positioning apparatus as claimed in claim 2 , wherein the joint unit exhibits a second rotational joint unit with a second stop position for a rotational movement.

5. The patient positioning apparatus as claimed in claim 4 , wherein the second stop position of the second rotational joint unit is dependent on the stop position of the first rotational joint unit.

6. The patient positioning apparatus as claimed in claim 4 , wherein the joint unit exhibits a first limb element, which is arranged between the first rotational joint unit and the second rotational joint unit.

7. The patient positioning apparatus as claimed in claim 6 , wherein the first limb element is arranged secured to a first rotational element of the first rotational joint unit and secured to a second rotational element of the second rotational joint unit.

8. The patient positioning apparatus as claimed in claim 6 , wherein the joint unit exhibits a second limb element, which exhibits a securing element for securing of surgical head securing unit.

9. The patient positioning apparatus as claimed in claim 8 , wherein the second limb element is secured to a rotational element of the second rotational joint unit.

10. The patient positioning apparatus as claimed in claim 8 , wherein the first limb element and the second limb element are secured to different rotational elements of the second rotational joint unit.

11. The patient positioning apparatus as claimed in 8 , wherein the first limb element exhibits a first length which at maximum corresponds to a second length of the second limb element.

12. The patient positioning apparatus as claimed in claim 1 , wherein the belt is crossed between the first rotational joint unit and the second rotational joint unit.

13. The patient positioning apparatus as claimed in claim 1 ,

wherein the second rotational joint unit exhibits a further rotational element, and the first rotational joint unit exhibits a rotational element,

wherein the first rotational element of the first rotational joint unit comprises a first radius, which is twice as large as a second radius of the further rotational element of the second rotational joint unit and a rotational movement is transferred between the two rotational elements by means of the belt.

14. The patient positioning apparatus as claimed in claim 13 ,

wherein the further rotational element of the second rotational joint unit is rotatable in relation to the first rotational element, embodied secured to the first limb element, of the second rotational joint unit and/or rotatable in relation to the second rotational element, embodied as secured to the second limb element, of the second rotational joint unit, and

wherein the rotatability of the further rotational element in relation to the two rotational elements is limited by the stop position.

15. The patient positioning apparatus as claimed in claim 13 , wherein the further rotational element of the second rotational joint unit exhibits a stop element.

16. A medical imaging apparatus, comprising:

a patient positioning apparatus as claimed in claim 1 .