Abstract: A computer-implemented method (200) of radiation events localizations is indicated for a pixelated radiation detector (10) having a scintillator array (24) of scintillator array elements (26) arranged in an (m)×(n) array, and an optical sensor array (28) of optical sensors (30) arranged in a (q)×(z) array and coupled to the scintillator array (24) in light sharing mode. The method includes the steps of sampling (72) spatial intensity distributions of scintillation photons emitted by the scintillator array (24) in response to multiple incident radiation events; performing a clustering analysis (76) based on the sampled spatial intensity distributions, to obtain clusters (84) of radiation events attributed to scintillator array elements (26), wherein the dimension of the sampled spatial intensity distributions correspond to the (q)×(z) dimensions of the optical sensor array (28), and determining the localization of the radiation events based on the clustering analysis (76).

Abstract: A method to position a subject to be scanned in a positron emission tomography (PET)-scanning device (1) is presented. According to this method, the subject to be scanned (P) is prepositioned in the PET-scanning device (1) and a set of PET-raw data is acquired of the subject to be scanned (P) for a series of slices by means of a detector (11) of the PET-scanning device (1). The acquired set of PET-raw data is represented in the form of at least one projection view, and the position of the subject to be scanned (P) relative to the detector (11) is directly assessed based on this at least one projection view. Furthermore, a PET-scanning device (1) configured to carry out this method and a computer program for controlling such a PET-scanning device are provided.

Abstract: A positron emission tomography (PET)-scanning device is provided having a detector ring for detecting emitted PET-radiation and a main supporting structure to which is attached a U-shaped portion with two arms for holding the detector ring between the arms (341). The detector ring is held by the two arms in such a way that the detector ring can be rotated about an axis of rotation that extends through the U-shaped portion, in particular through the two arms of the U-shaped portion. The main supporting structure has a guide rail to which the U-shaped portion is attached in such a way, that the U-shaped portion can be displaced along the guide rail, wherein the guide rail extends along an inclined direction relative to the direction of gravity.

Abstract: A detector (2) for a positron emission tomography (PET)-scanning device is provided, the detector (2) including an opening (28) sized to accommodate the head of a human patient (P) and a plurality of sensor modules (22), which serve to detect emitted PET-radiation from the human patient (P) and which are arranged in the form of a regular polygon having a plurality of corners (24a, 24b, 24c). The detector further has an inner surface (23), which is arranged radially inside of the sensor modules (22), in order to circumferentially delimit the opening (28). The sensor modules (22) are arranged such that one of the corners is a nose corner (24a) which is adapted to accommodate the patient's nose (N) in the intended normal use of the detector (2). The inner surface (23) reflects the shape of the polygon at least in the region of the nose corner (24a).

Abstract: A positron emission tomography (PET)-scanning device is provided, having a detector ring for detecting emitted PET-radiation and a main supporting structure which has or to which is attached a U-shaped portion with two arms for holding the detector ring between the arms. The detector ring is held by the two arms in such a way that the detector ring can be rotated about an axis of rotation that extends through the U-shaped portion, in particular through the two arms of the U-shaped portion.

Abstract: A computer-implemented method (200) of radiation events localizations is indicated for a pixelated radiation detector (10) having a scintillator array (24) of scintillator array elements (26) arranged in an (m)×(n) array, and an optical sensor array (28) of optical sensors (30) arranged in a (q)×(z) array and coupled to the scintillator array (24) in light sharing mode. The method includes the steps of sampling (72) spatial intensity distributions of scintillation photons emitted by the scintillator array (24) in response to multiple incident radiation events; performing a clustering analysis (76) based on the sampled spatial intensity distributions, to obtain clusters (84) of radiation events attributed to scintillator array elements (26), wherein the dimension of the sampled spatial intensity distributions correspond to the (q)×(z) dimensions of the optical sensor array (28), and determining the localization of the radiation events based on the clustering analysis (76).

Abstract: A method which allows the continued use of a credit card which is expired in terms of time or value units for automatic vendors which are in communication with a central evaluation location. The method of the invention allows a continuation of telephone calls, for example, even with an expired telephone credit card. This occurs in that debiting of the fee units used or made to the account of the card owner at the central evaluation location in a chronologically limited transition time after every service performance so that a call is not cut-off in the middle of a call.

Abstract: A method for the evaluation of used fee units of a card owner and of a central evaluation location (uP) stored on credit cards (KK) for automatic vendors.In the present invention an evaluation method which prevents manipulations at the credit card is used.This results in that the used fee units are stored in at least one counter (RZ1, RZ2) arranged on the credit card (KK) whose current reading is called in by the central evaluation location (uP) at intervals unknown to the card owner, particularly at randomly oriented intervals, and, subsequently is compared in the evaluation location (uP) to the most recently called-in counter reading. The account of the card owner is charged with the difference between the old and the new fee units.