A radiographic phantom comprises: a body comprising a wax material or a wax-like material, wherein the body has an x-ray attenuation value that is approximately the same as that of a human tissue; and a plurality of crystalline test objects positioned on or within the body. A method comprises: obtaining a radiographic phantom comprising a body and a plurality of crystalline test objects positioned on or within the body, wherein the body comprises a wax material or a wax-like material, and wherein the body has an x-ray attenuation value that is approximately the same as that of a human breast tissue; performing an operation of the radiographic phantom and using a device; and assessing a performance of the device based on the operation.

A positron emission tomography (PET) technique that can enhance the image resolution and system sensitivity of a clinical PET/CT scanner for imaging a whole body or a target region of a subject is provided. The system includes a detector array and a detector panel. The detector array includes an array of gamma ray detectors defining a field of view of a scanner and configured to detect at least one coincidence event. The detector panel includes an array of gamma ray detectors having a higher intrinsic spatial resolution than the detector array and positioned in closer proximity to a patient table than the detector array. The detector panel is positioned outside the field of view defined by the detector array during at least a portion of scanning by the PET system. The detector panel is configured to detect at least one coincidence event in cooperation with the detector array. The control unit is configured to control the detector array, the detector panel, and the patient bed to operate in cooperation with each other.

Disclosed herein are an X-ray input apparatus capable of exactly reflecting an operator's intention to perform calibration control, an X-ray imaging apparatus including the X-ray input apparatus, and a method of controlling the X-ray input apparatus. In accordance with an aspect of the present disclosure, an X-ray input apparatus comprises a body configured to be accommodated in a holder of an X-ray imaging apparatus. The apparatus also includes a touch sensor disposed on an outer circumferential surface of the body and configured to sense a touch. The apparatus also includes a radiation button disposed on a top of the body and configured to receive a control command from an operator. The apparatus also includes an input controller configured to perform calibration control when the body is accommodated in the holder, thereby deciding a capacitance threshold value of the touch sensor.

A medical imaging system includes an X-ray source for transmitting X-rays through a subject and a detector for receiving the X-ray energy of the X-rays after having passed through the subject. The system also includes a processing system which is programmed to generate a pre-shot image of the subject using low energy X-ray intensity from the X-ray source and to determine a plurality of acquisition parameters for a main scan of the subject based on the pre-shot image. The processing system is also programmed to determine a saturation time of the detector for the corresponding acquisition parameters based on detector calibration data and to determine a number of time frames required to reach the targeted dose based on the saturation time. The processing system is further programmed to apply an X-ray dosage level of the subject using the X-ray source based on the number of time frames and to generate the image of the subject based on the detected X-ray energy at the X-ray detector for the applied X-ray dosage level.

A surgical robotic platform operates within a constrained space of an imaging scanner in which a patient resides. The platform includes a gross positioning stage configured to be located outside of the constrained space An end-effector having a rotatable shaft is extendable from the gross positioning stage and into the constrained space of the imaging scanner. The shaft has a proximal end operatively coupled to the positioning stage outside of the constrained space and a distal end configured to be located in the constrained space. The distal end has a medical instrument gripper for holding a medical instrument used in a percutaneous procedure. The end-effector further includes a joint arrangement operatively coupling the shaft to the medical gripper for providing motion to the medical instrument gripper for enabling position and/or orientation control of the medical instrument. A drive module controls the joint arrangement.

Methods and systems are provided for reconstruction error assessment for an interventional tool utilized in an image guided interventional procedure. In one example, an error model based on a target lesion position within a tissue, one or more interventional tool parameters, and imaging system parameters may be utilized to estimate an expected reconstruction error for the interventional tool. In another example, when the interventional tool is within the tissue, the expected reconstruction error may be utilized along with observed tool shape and size to infer an actual tool position and shape within the tissue.

According to one embodiment, an X-ray diagnostic apparatus includes an X-ray irradiator, a scatterer, a grid, and a detector. The X-ray irradiator irradiates X-rays. The scatterer is provided between the X-ray irradiator and an object, that scatters the irradiated X-rays. The grid is provided between the scatterer and the object, that transmits the scattered X-rays within a predetermined angular range. The detector detects X-rays transmitted through the object together with an incident angle of the X-rays.

The invention relates to a problem of setting mutual position of an anatomy being imaged and imaging means of a computed tomography imaging apparatus so that specifically the very volume of the anatomy desired to be imaged actually is imaged. To further the positioning, a positioning tool in a form of a three-dimensional virtual positioning model (40), generated from the anatomy to be imaged, is shown on a display from which the volume (41) of the anatomy desired to be imaged can be pointed, selected or defined.

The present invention relates to a system (10) for X-ray dark-field, phase contrast and attenuation image acquisition. The system comprises an X-ray source (20), an interferometer arrangement (30), an X-ray detector (40), a control unit (50), and an output unit (60). An axis is defined extending from a centre of the X-ray source to a centre of the X-ray detector. An examination region is located between the X-ray source and the X-ray detector. The axis extends through the examination region, and the examination region is configured to enable location of an object to be examined. The interferometer arrangement is located between the X-ray source and the X-ray detector. The interferometer arrangement comprises a first grating (32) and a second grating (34). For a first mode of operation: The control unit is configured to control at least one lateral movement transducer (70) to move the first grating or move the second grating in a lateral position direction perpendicular to the axis. The control unit is configured to control the X-ray detector to acquire image data whilst the first grating and/or second grating is moving. During an exposure time of the X-ray detector the first grating and/or second grating has moved a distance less than a period of the first grating and/or second grating. The control unit is configured to control movement of the first grating and/or second grating such that the image data is acquired whilst the first grating and/or second grating is moving. For the first mode of operation the output unit is configured to output one or more of: dark-field image data, phase contrast image data, and attenuation image data.

The present invention relates to a device (1) for fractional flow reserve determination. The device (1) comprises a model generator (10) configured to generate a three-dimensional model (3DM) of a portion of an imaged vascular vessel tree (VVT) surrounding a stenosed vessel segment (SVS), based on a partial segmentation of the imaged vascular vessel tree (VVT). Further, the device comprises an image processor (20) configured to calculate a blood flow (Q) through the stenosed vessel segment (SVS) based on an analysis of a time-series of X-ray images of the vascular vessel tree (VVT). Still further, the device comprises a fractional-flow-reserve determiner (30) configured to determine a fractional flow reserve (FFR) based on the three-dimensional model (3DM) and the calculated blood flow.