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1. (WO2019002257) SCATTERED X-RAY DETECTION TO DETECT MISUSE AND PREVENT HARM
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CLAIMS:

1. An apparatus (M) for supporting X-ray imaging, comprising:

an input interface (IN) for receiving an X-radiation scatter measurement obtained by at least one X-ray sensor ( SXr) during operation of an X-ray imager (XI) for imaging a first object (PAT);

a predictor component (PC) configured to predict, based on said measurement, whether or not:- i) a second, not imaged, object (P) is present, wherein the at least one X-ray sensor (SXi) is arranged away from the second object (P), or

ii) there is sufficient X-ray exposure of said first object (PAT); and an output interface (OUT) for outputting a predictor signal indicative of an outcome of said prediction.

2. Apparatus of claim 1, further comprising a transducer (TR) configured to issue an alert signal in response to the predictor signal, said transducer (TR) being any one or a combination of i) auditory or ii) optical.

3. Apparatus of claim 1 or 2, comprising a renderer (GI) configured to effect displaying on a display unit (DU) a message in relation to the predictor signal.

4. Apparatus of any one the previous claims, comprising a communication component (CC) configured to forward a message in relation to said predictor signal over a communication network to a recipient (RC).

5. Apparatus of any one the previous claims, comprising a safety enforcer (SE) configured to cause an action to at least affect the dose of X-radiation received at the first object (PAT), based on the predictor signal.

6. Apparatus of any one the previous claims, wherein the X-ray imaging apparatus (XI A) comprises an X-ray detector (XD) for imaging the first object (PAT), and where the at least one sensor (SXr) is different from said X-ray detector (XD).

7. Apparatus of any one the previous claims 1-5, wherein the X-ray imaging apparatus (XI) comprises an X-ray detector (XD), wherein the at least one sensor (SXr) is part of the X-ray detector.

8. Apparatus of any one the previous claims, wherein operation of the predictor component (PC) is based on a machine learning algorithm trained by one or more samples of

X-radiation scatter measurements.

9. Apparatus of any one the previous claims, wherein the predictor component (PC) is configured to compare said measurement against one or more pre-defined X-radiation scatter thresholds.

10. An imaging system, comprising:

apparatus of any one of previous claims 1-9;

the X-ray imager (XI); and

the at least one X-ray sensor (SXr).

1 1. System of claim 8, wherein the X-ray imager (XI) resides in a room (RM) with the at least one X-ray sensor (SXr) arranged on a wall (W) or a floor (F) or a ceiling (CL) of said room.

12. System of claim 9 or 10, wherein the at least one X-ray sensor (SXr) is arranged on the X-ray imager (XI).

13. A grid structure (GS) for X-ray imaging mountable on an X-ray detector (XD) of an X-ray imager (XI), comprising a first plurality of walls (lp) focused on a first location

(11) outside said structure and a second plurality of walls (Is) focused on second location (12) outside said structure and different from said first location (11).

14. An imaging system, comprising:

an apparatus of any one of previous claims 1-8;

the X-ray imager (XI) having a grid structure as per claim 13 mounted on an X-ray detector XD of said imager (XI); and

wherein at least one X-ray sensor is formed from one or more pixels of said X-ray detector.

15. Method of supporting X-ray imaging, comprising the steps of:

receiving (S405) an X-radiation scatter measurement obtained by at least one X-ray sensor (SXr) during operation of an X-ray source (XS) of an X-ray imager (XI) to expose a first object (PAT) to X-radiation for imaging;

predicting (S410), based on said measurement, whether or not:- i) a second, not imaged, object (P) is present, wherein the at least one X-ray sensor (SXi) is arranged away from the second object (P) or

ii) there is sufficient X-ray exposure of said first object (PAT); and

outputting (S415) a predictor signal indicative of an outcome of said prediction.

16. A computer program element, which, when being executed by at least one processing unit (PU), is adapted to perform the method as per claim 15.

17. A computer readable medium having stored thereon the program element of claim 16.