An X-ray diagnostic apparatus comprises an X-ray tube and processing circuitry. The X-ray tube includes a rotary anode. The processing circuitry is configured to derive an acquiring condition from a fluoroscopic image, and start to increase, in accordance with the acquiring condition derived, a rotating speed of the anode from a low rotating speed to a high rotating speed before the X-ray tube finishes emitting an X-ray to acquire the fluoroscopic image.

One or more example embodiments provides a method for evaluating an angiographic dual-energy computed tomography dataset recorded using a contrast agent comprising iodine to determine a quantitative calcium score.

A medical image processing apparatus according to an embodiment includes processing circuitry. The processing circuitry is configured: to perform registration between one contrast image and each of a plurality of mask images; to calculate a plurality of matching degrees between the plurality of mask images and the one contrast image registered with each other, on the basis of the plurality of mask images and the one contrast image registered with each other; and to determine a difference between one of the mask images corresponding to a maximum matching degree among the plurality of matching degrees and the one contrast image, as one subtraction image corresponding to the one contrast image.

Provided herein is technology relating to controlling radiation and protecting biological organisms from exposure to radiation and particularly, but not exclusively, to apparatuses, methods, and systems for minimizing and/or eliminating exposure of humans to stray radiation used for medical imaging and therapy.

A method and apparatus for generating a tooth panoramic image, and a panoramic machine for photographing teeth. The method comprises: determining a frame frequency of a reference detector, and determining a frame frequency of a photographing detector according to the frame frequency of the reference detector; photographing the teeth of a user according to the frame frequency of the photographing detector so as to generate a plurality of images; performing shift superposition on the plurality of images so as to generate a first panoramic image; acquiring a fuzzy region in the first panoramic image; and performing frame frequency adjustment on each row in the fuzzy region so as to form a clear image, and fusing the clear image and the first panoramic image so as to generate a second panoramic image. Each row of an image is imaged by using different frame frequency change rules, so that both the cusps and the roots of the teeth of a user can be placed in a focusing layer, so as to form an image clearly, which improves the clarity of a panoramic image.

A method includes obtaining a dark-field signal generated from a dark-field CT scan of an object, wherein the dark-field CT scan is at least a 360 degree scan. The method further includes weighting the dark-field signal. The method further includes performing a cone beam reconstruction of the weighted dark-field signal over the 360 degree scan, thereby generating volumetric image data. For an axial cone-beam CT scan, in one non-limiting instance, the cone-beam reconstruction is a full scan FDK cone beam reconstruction. For a helical cone-beam CT scan, in one non-limiting instance, the dark-field signal is rebinned to wedge geometry and the cone-beam reconstruction is a full scan aperture weighted wedge reconstruction. For a helical cone-beam CT scan, in another non-limiting instance, the dark-field signal is rebinned to wedge geometry and the cone-beam reconstruction is a full scan angular weighted wedge reconstruction.

When a first-stage push-button switch of an operation unit (2) is pressed, an X-ray imaging control unit (72) transmits a signal A for starting voice guidance to a signal output unit (73) for a voice guidance unit as well as a signal B for starting preparation of X-ray imaging to an X-ray tube control unit (71). At this time, when the pushing operation of the push-button switch is performed, the X-ray imaging control unit (72) immediately transmits the signal A for starting the voice guidance to the signal output unit (73) for the voice guidance unit but transmits the signal B for starting the X-ray imaging after a time t1 has elapsed. The time t1 is a time calculated by subtracting a time t3 required for preparing an X-ray tube (42) for performing X-ray imaging from a time t2 required for the voice guidance.

The present disclosure discloses a scanning method and apparatus, a storage medium, and a computer device. The method includes: obtaining plain film information of a target scanning object, and determining a target bed height based on the plain film information; adjusting the plain film information based on the target bed height to obtain target plain film information; and performing a subsequent operation based on the target plain film information. The present disclosure helps to quickly determine the target bed height, adjust the plain film information based on the target bed height, and perform the subsequent operation based on adjusted plain film information. Thus, a quality of a scanned image is improved while an adjustment efficiency is increased, thereby greatly improving user experience.

The present disclosure relates to determining a biological tissue structural marker for diagnosis of a disease using a biological tissue characterization technique. A method for determining a structural marker for a diagnosis of a disease can include measuring a first molecular structure of a biological tissue of a first population of animals, after a carcinogenic or pathogenic substance was introduced into the first population. A second molecular structure of the biological tissue of a second population of animals can be measured, wherein the second population did not receive the carcinogenic or pathogenic substance. A first and a second structural marker of the molecular structures of the biological tissue of the first and second populations, respectively, can be identified and compared to determine that the first structural marker is indicative that the biological tissue of the first population of animals was affected by the disease.

The present disclosure provides systems and methods for create a scanning pencil beam of x-rays and the air cooling of the system. The system has an enclosure with an x-ray beam source disposed therein. An x-ray wheel having or holding an x-ray attenuating ring is disposed proximate to an end of the enclosure and is configured and disposed to rotate the x-ray attenuating ring and form a scanning pencil beam. The system has at least one air inlet and air outlet and at least one air moving device configured and disposed to move air through the air inlet and the air outlet and to air cool the x-ray system.