A system includes acquisition of first electronic image data representing a phantom located at a first position and irradiated by a first radiation field emitted by a radiation emitter, acquisition of second electronic image data representing the phantom located at a second position based at least on a first light field emitted by a light emitter and irradiated by a second radiation field emitted by the radiation emitter, generation of third electronic image data by correcting the second electronic image data based at least on the first electronic image data, and determination of a deviation between the first light field and the second radiation field based at least on the third electronic image data

Verification of mlc leaf position and of radiation and light field congruence

An apparatus (300, 400, 500, 600), method and program storage device are provided for co-registration of multi-modal images in a three-dimensional environment, where the apparatus includes a source of excitation light (510), an electromagnetic-ray source (550) disposed relative to the source of excitation light, an electromagnetic-ray transparent mirror (560) having a first surface disposed towards the excitation light and a second surface disposed towards the electromagnetic-ray source, a target location (530) disposed towards the first surface of the electromagnetic-ray transparent mirror for locating a target and receiving the excitation light and the electromagnetic rays, an electromagnetic-ray detector (570) disposed on an opposite side of the target location relative to the electromagnetic-ray transparent mirror for detecting electromagnetic-rays transmitted through the target, a second electromagnetic-ray transparent mirror (562) having a light-reflective surface disposed towards the target location, and a light detector (542) disposed towards the light-reflective surface of the second electromagnetic-ray transparent mirror for detecting light from the target

Real-time acquisition of co-registered x-ray and optical images

Radiation therapy or diagnostic that will ultimately be delivered in a manner that, in addition to being spatially precise, is capable of adapting instantaneously to changes in patient or subject anatomy. The related system and method can adapt to the time dependent geometry of internal patient anatomy and yield a temporally precise IMRT beam that is optimized for the instantaneous configuration of the internal target and avoidance structures.

System and method for temporally precise intensity modulated radiation therapy (imrt)

A radiation imaging system includes a radiation head with a radiation source and an adjustable angular orientation. A radiation image detection device has a photostimulable medium that records an image according to radiation emitted from the radiation source. An measurement sensor apparatus, preferably inertial, is coupled to the photostimulable medium to provide three- dimensional data for determining the orientation of the photostimulable medium. There is at least one indicator responsive to the orientation data from the measurement sensor apparatus for indicating an orientation adjustment of the radiation source is needed in at least one direction.

Position sensing apparatus for radiation imaging system

PROBLEM TO BE SOLVED: To provide a radiation imaging apparatus equipped with a radiation source held in an extending/contracting portion extended in the vertical direction, which is capable of correcting positional shifting between the radiation source and a radiation detection means by inclination of the extending/contracting portion. SOLUTION: The radiation imaging apparatus includes: a radiation source 16; a radiation detection means; an imaging element mounting portion on which the radiation source 16 is mounted; an extending/contracting portion, capable of extending and contracting in an almost vertical Z direction, for holding the imaging element mounting portion; horizontal movement driving sections 33, 43 for separately moving the extending/contracting portion in each of the X and Y directions and a vertical movement driving section 53 for extending and contracting the extending/contracting portion; and a vertical driving section, for extending and contracting the extending/contracting portion. The radiation imaging apparatus is equipped with: inclination angle sensors 95, 96 for detecting the inclination of the longitudinal axis of the extending/contracting portion with respect to the gravity direction; and a control means 30 for obtaining an amount of positional shifting of the radiation source 16 from a predetermined position, based on the inclination detected by the inclination angle sensors 95, 96, and the length of the extending/contracting portion and for driving at least one of the driving sections 33, 43, 53 so as to correct the positional shifting. COPYRIGHT: (C)2011,JPO&INPIT

Radiation imaging apparatus

A method is provided for determining source-to-image distance (SID) setpoints in a digital imaging system. SID setpoints are determined during a setup and calibration procedure which includes generating radiation beams while varying certain system parameters, such as the radiation source position, and detecting and determining the size of the radiation beams that impact on the digital detector. SID values and a separation gain constant can then be determined based on the calculated sizes of the detected radiation beams and the feedback signals which are representative of the various system parameters that were varied (e.g., source position, etc.) during the setup and calibration procedure. The separation gain constant and the calculated, empirical SID values can then be used to position the radiation source at any user-selected SID based on position sensor feedback signals. The procedure also provides for a calibrated readout of the SID, which can be displayed to a user of the imaging system.

Method and system for determining a source-to-image distance in a digital imaging system

The present technique provides a method and system for centering a radiographic imaging system to provide minimal non-diagnostic radiation to a patient. The present technique incorporates a radio-opaque template that is substantially aligned to a light field produced from a light source. The present technique also incorporates a processing module that determines an offset distance from the features of the template to features detectable in data from an x-ray exposure. A processing module determines the offset distance utilizing an algorithm for recognizing the radio-opaque features and determining distances between the features and the detected edges or similar features of the exposure.

Methodology for determining x-ray to light field decentering on digital radiographic image systems

PROBLEM TO BE SOLVED: To provide a method to determine the distance between a line source and an image in a digital imaging system SOLUTION: An SID set point is determined between a set-up and a calibration procedure including the generation of radiation beam while changing a certain system, parameter (for example, a position of a radiation source) to detect and determine the size of radiation beam that is projected onto a digital detector Then, an SID value and a clearance gain constant are determined on the basis of a calculation value of the size of the detected radiation beam and a feedback signal that expresses a variety of system parameters which are changed between the above procedures It is then possible to position the radiation source to any such SID position that users may select on the basis of the feed-back signals of a position sensor by using the clearance gain constant and an experimented value of SID after calculated

Robert Michael Stetz

Papers

Method and system for determining a source-to-image distance in a digital imaging system

Methodology for determining x-ray to light field decentering on digital radiographic image systems

Method and system to determine distance between line source and image in digital imaging system