Dose control method for a mobile x-ray detector of a medical x-ray system using calculated latency
One or more example embodiments of the present invention relates to a dose control method for a mobile x-ray detector of a medical x-ray system, comprising generating a data packet having a time stamp of a clock of the mobile x-ray detector and a dose value; sending the data packet via a radio link from the mobile x-ray detector to an x-ray generator; receiving the data packet from the x-ray generator; comparing the time stamp with a clock of the x-ray generator and calculating a latency; and extrapolating an overall dose from the dose value, the time stamp and the latency.
1 . A dose control method for a mobile x-ray detector of a medical x-ray system, the method comprising:
generating a data packet having a time stamp of a clock of the mobile x-ray detector and a dose value;
sending the data packet via a radio link from the mobile x-ray detector to an x-ray generator;
receiving the data packet from the x-ray generator;
comparing the time stamp with a clock of the x-ray generator and calculating a latency; and
extrapolating an overall dose from the dose value, the time stamp and the latency.
2 . The method of claim 1 , wherein the generating, the sending, the receiving, the comparing and the extrapolating are repeated iteratively until the overall dose corresponds to a target dose.
3 . The method of claim 2 , wherein the clock of the x-ray detector is synchronized with a clock of the x-ray generator.
4 . The method of claim 3 , wherein the synchronization accuracy essentially amounts to 1 μs.
5 . The method of claim 4 , wherein the dose value is an accumulated dose value.
6 . The method of claim 5 , wherein the data packets are generated and sent at regular intervals.
7 . The method of claim 6 , wherein the interval essentially amounts to 10 μs.
8 . The method of claim 7 , wherein the extrapolating uses a start of radiation, a temporal profile of a tube current, a temporal profile of a tube voltage or a constant tube voltage based on a measured, modeled or extrapolated profile.
9 . The method of claim 8 , wherein the extrapolating is based on a parameter of a calibration of a dose profile to be expected.
10 . The method of claim 1 , wherein the clock of the x-ray detector is synchronized with a clock of the x-ray generator.
11 . The method of claim 10 , wherein the synchronization accuracy essentially amounts to 1 μs.
12 . The method of claim 1 , wherein the dose value is an accumulated dose value.
13 . The method of claim 1 , wherein the data packets are generated and sent at regular intervals.
14 . The method of claim 13 , wherein the interval essentially amounts to 10 μs.
15 . The method of claim 1 , wherein the extrapolating uses a start of radiation, a temporal profile of a tube current, a temporal profile of a tube voltage or a constant tube voltage based on a measured, modeled or extrapolated profile.
16 . The method of claim 1 , wherein the extrapolating is based on a parameter of a calibration of a dose profile to be expected.
17 . The method of claim 1 , wherein a quality of the radio link is monitored based on the time stamp.
18 . The method of claim 1 , wherein in a case of a disturbed radio link, radiation is interrupted or a dose value is extrapolated.
19 . A mobile x-ray detector configured to perform the method of claim 1 .
20 . An x-ray system comprising:
the mobile x-ray detector of claim 19 .