The invention concerns an X-ray sensing detector assembly, wherein the detector assembly comprises: at least one primary X-ray sensing member; and an X-ray blocking detector housing surrounding the at least one primary X-ray sensing member, wherein a first, upper side of the detector housing is provided with an X-ray window allowing passage of X-rays into the detector housing so as to allow X-rays directed towards the first, upper side of the detector housing to pass through the X-ray window and interact with the at least one primary X-ray sensing member. The detector assembly is provided with at least one secondary X-ray sensing member arranged outside of the detector housing, wherein an X-ray blocking element is arranged on an upper side of the secondary X-ray sensing member so as to prevent that the secondary X-ray sensing member is exposed to X-rays directed towards the first, upper side of the detector housing.

Methods for setting up, maintaining and operating a radiopharmaceutical infusion system, that includes a radioisotope generator, are facilitated by a computer of the system. The computer may include pre-programmed instructions and a computer interface, for interaction with a user of the system, for example, in order to track contained volumes of eluant and/or eluate, and/or to track time from completion of an elution performed by the system, and/or to calculate one or more system and/or injection parameters for quality control, and/or to perform purges of the system, and/or to facilitate diagnostic imaging.

An image calibration method includes capturing and correcting a flood field image for background signal and effects of known image-panel features (dead/bad pixels). The corrected image is processed to separate frequencies characteristic of relative pixel sensitivities from frequencies characteristic of radiation energy fluence. The incident energy fluence has a known maximum in-field energy fluence gradient. A model that describes the incident energy fluence on a detector is generated or received. The corrected image may be modeled at frequencies at or below the maximum in-field energy fluence gradient. A pixel sensitivity matrix (PSM) is generated by adjusting the corrected image with the model of the incident energy fluence on the detector. For example, the corrected image signal may be divided by the model or the model may be subtracted from the corrected image. The PSM may be used to correct additional raw images captured by the detector.

Systems and methods for determining a radiation isocenter of a linear accelerator (LINAC). Determining the radiation isocenter may include determining a set of three-dimensional (3D) radiation beam axes of the LINAC from two-dimensional (2D) radiation transmission images. The radiation isocenter may be determined based on at least the set of 3D radiation beam axes. Determining the set of 3D radiation beam axes may including constructing a 3D radiation beam axis based on a determined location of a beam axis of a radiation beam generated with a gantry of the LINAC at an angle relative to a reference gantry angle, a determined center of a shadow of a radiation opaque marker in the radiation field of the radiation beam, and the gantry angle.

Systems and methods for determining a target multi-source model of a radiation source corresponding to an energy spectrum is provided. The systems may obtain an initial multi-source model of the radiation source, which includes an initial phase space file that includes information of a plurality of simulated particles of a plurality of energy levels. The systems may estimate, based on the initial phase space file, a plurality of component PDD curves corresponding to the plurality of energy levels. The systems may obtain a measured PDD curve corresponding to radiation of the energy spectrum. For each energy level, the systems may determine, based on the plurality of component PDD curves and the measured PDD curve, a weight for the each energy level. The systems may further determine the target multi-source model of the radiation source based at least in part on the initial multi-source model and the weights.

A phantom, calibration system and calibration method are described. The phantom having a phantom body and an X-ray luminescent material, wherein at least a portion of the X-ray luminescent material is on a surface of the phantom.

These teachings facilitate the administration of therapeutic radiation to a heterogeneous patient volume using a radiation beam source. More particularly, these teachings provide for determining a cross-sectional size of a radiation beam as corresponds to that radiation beam source and also for determining density information corresponding to the aforementioned heterogeneous body. These teachings then provide for generating a three-dimensional radiation dose calculation for the heterogeneous body using a control circuit configured as a convolution/superposition based dose calculator using a three-dimensional energy-spreading kernel. By one approach, these teachings provide for the calculator scaling total energy released per mass as a function of the cross-sectional size and energy of the radiation beam and the aforementioned density information.

An example computer-implemented method for tuning a beam spot in a radiation therapy system based on radiation field measurements has been disclosed. The example method includes configuring an electron beam to generate a first beam spot on an electron-beam target of the radiation therapy system, determining a value for one or more radiation field quality metrics for a first radiation beam that originates from the first beam spot, and based on the value, determining whether the first radiation beam is outside a specified quality range.

A particle beam adjustment device includes: a position monitor that detects a positional deviation of a particle beam transported from a beam transport section; an interlock device to interrupt irradiation of the particle beam when a positional deviation of the particle beam is detected by the position monitor; a pair of screen monitors that measure position and angle of an axis of the particle beam; a correction electromagnet that controls the axis of the particle beam by adjusting a magnetic field on a basis of a signal indicating the particle beam position and angle measured by the screen monitors; and a beam scanning electromagnet that irradiates an irradiation target with the particle beam. One of the screen monitors is installed outside a treatment room, and the other screen monitor and the position monitor are installed inside the treatment room.

Dose analysis radiotherapy systems and methods for determine delivered radiotherapy dose, dose rate, irradiation time and position information and planned radiotherapy dose, dose rate, irradiation time and position information. The dose analysis systems and methods further compare the as delivered dose, dose rate, irradiation time and position information to the planned dose, dose rate, irradiation time and position information to generate a graphical representation of one or more of the delivered dose, dose rate, irradiation time and position information versus planned dose, dose rate, irradiation time and position information.