A tuning method for a collimator of a CT machine, which, in each cycle of X-ray scan operation and stop, may include determining whether an X-ray is generated from the anode plate; calculating the Z-direction heating displacement of the slot plate during the current scan based on a detected X-ray, driving the slot plate to move by the heating displacement in the Z-direction, calculating the total Z-direction heating displacement of the slot plate at the end of the current scan, calculating the cooling displacement of the slot plate during the current stop based on the stop time of the X-ray, and driving the slot plate to move.

An apparatus and method are described for capturing images in visible light as well as other radiation wavelengths. In one embodiment, the apparatus comprises: a diffraction coded imaging system including a plurality of apertures arranged in a diffraction coded array pattern with opaque material blocking array elements not containing apertures; and a light- or radiation-sensitive sensor coupled to the diffraction coded imaging system array and positioned at a specified distance behind the diffraction coded imaging system array, the radiation-sensitive sensor configured to sense light or radiation transmitted and diffracted through the apertures in the diffraction coded imaging system array.

Camera device and method for shooting light having at least two wavelength bands are disclosed. The camera device includes a first camera containing a first lens for receiving light having a first wavelength band; a second camera including a second lens for receiving light having a second wavelength band which is different from the first wavelength band, the second lens being disposed facing the first lens of the first camera; and a parabolic mirror set between the first camera and the second camera, able to let the light having the first wavelength band penetrate therethrough, and at the same time, reflect the light having the second wavelength band. The first camera is a non-fisheye camera. The first lens is a non-fisheye lens. The second camera and the parabolic mirror form a catadioptric camera. The aperture stop of the non-fisheye lens coincides with the focal point of the parabolic mirror.

The present disclosure provides a method for analyzing the signal of a neutral atom imaging unit, including: preparing a neutral atom imaging unit, which includes a semiconductor detector array and modulation grids disposed at intervals in front of the semiconductor detector array; preparing a neutral atom source plane, energetic neutral atoms emitted by the neutral atom source plane are received by the semiconductor detector array after passing through the modulation grids, and the modulation grids form a projection on the semiconductor detector array; obtaining a response function of the imaging unit according to the projection; calculating the data signal obtained by the neutral atom imaging unit; and performing inversion imaging on the neutral atom emission source according to the response function of the imaging unit and the data signal. The method well inverts the neutral atom emission source to obtain the intensity and size of the neutral atom emission source.

Improved imaging devices and methods. A portable SPECT imaging device may co-register with imaging modalities such as ultrasound. Gamma camera panels including gamma camera sensors may be connected to a mechanical arm. A coded aperture mask may be placed in front of a gamma-ray photon sensor and used to construct a high-resolution three-dimensional map of radioisotope distributions inside a patient, which can be generated by scanning the patient from a reduced range of directions around the patient and with radiation sensors placed in close proximity to this patient. Increased imaging sensitivity and resolution is provided. The SPECT imaging device can be used to guide medical interventions, such as biopsies and ablation therapies, and can also be used to guide surgeries.

An method is provided including determining a first set of aperture patterns and a second set of aperture patterns for performing measurements with an imaging device such that for each aperture pattern in the first set of aperture patterns there exists a complementary aperture pattern in the second set of aperture patterns, wherein the imaging device comprises a sensor and an aperture assembly having a plurality of aperture elements; performing a measurement for each respective aperture pattern in the first set and in the second set by changing a property associated with one or more of the plurality of aperture elements in accordance with the respective aperture pattern; and processing the performed measurements to extract information about an image.

A system for imaging at least one source of radiation with a mask and a plurality of detectors. The mask is characterized by a base pattern and configured to selectively transmit or block the radiation striking the mask based in part on the base pattern. The mask includes a plurality of tiles each repeating the base pattern. The number of the detectors is N and each of the tiles is divided into N respective portions. The plurality of detectors is positioned in a spaced apart configuration such that each of the plurality of detectors captures the radiation passing through different ones of the N respective portions of the plurality of tiles. The different ones of the N respective portions combine to form the base pattern.

A radiation detector assembly is provided that includes a semiconductor detector, a collimator, plural pixelated anodes, and at least one processor. The collimator has openings defining pixels. Each pixelated anode is configured to generate a primary signal responsive to reception of a photon and to generate at least one secondary signal responsive to reception of a photon by at least one surrounding anode. Each pixelated anode includes a first portion and a second portion located in different openings of the collimator. The at least one processor is operably coupled to the pixelated anodes, and configured to acquire a primary signal from one of the pixelated anodes; acquire at least one secondary signal from at least one neighboring pixelated anode; and determine a location for the reception of the photon using the primary signal and the at least one secondary signal.

A masking assembly is presented for use in inspecting a region of interest by creating structured high photon energy radiation to interact with the region of interest. The masking assembly comprises at least one mask structure, the mask structure having a predetermined effective thickness t, and comprising a mask pattern formed by an arrangement of spaced-apart features of absorption properties with respect to said high photon energy radiation different from spaces between said features. The arrangement of said features along a lateral dimension of the pattern defines a predetermined effective pattern size P. The features have a characteristic lateral size/providing a substantially high aspect ratio t/l.

The present invention provides a neutron-shielding coded aperture having a boron polyethylene (PE) mask, which is attached to the front end of a tungsten mask pattern of a coded aperture and has the same pattern. In order to alleviate a neutron-shielding problem, a material, in which high-density polyethylene (HDPE) having excellent neutron-shielding ability is mixed with boron, is attached to the front end of a conventional coded aperture so as to block both gamma rays and neutrons.