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Slot scanning x-ray

In addition to the functionality of conventional digital x-ray and tomography machines, the linear slot scanning feature of this unique device will also allow full body x-ray scans, x-ray scans of specific areas, and angled x-ray scans. Data acquisition is achieved with slot-scan technology—that is, the x AMBER incorporates a feedback mechanism to control local x-ray exposure during scanning to. The detector is exposed by the lilac coloured x-ray beam for a period of less than a second. In slot scanning, a narrow image sensor moves in synchrony with an x-ray fan beam. As the tungsten blades of a collimator, located just beneath the x-ray tube, move from side to side, so the lilac x-ray fan beam sweeps back and forth.

Technologies

Linear slot-scanning radiography LSSR is the method of taking X-ray images whereby the X-ray source and detector move across the patient, or region of interest, during image acquisition. This new, multipurpose device allows a greater number of radiologic studies from a single machine. The image quality scores of the SSS were significantly better than DFD for a majority of criteria for both the phantom and the clinical evaluations. P This new, multipurpose device allows a greater number of radiologic studies from a single machine. As a result, the thyroid gland, mammary glands, and gonads — the most radiosensitive organs of these patients — are exposed, resulting in potentially high cumulated effective radiation dose. During a scan the device has the ability to simultaneously record the image and the scatter separately allowing the operator post study to view, level, and window these images separately, or window and level them separately on the same image.

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Linear Slot Scanning Radiography LSSR

Linear slot-scanning radiography LSSR is the method of taking X-ray images whereby the X-ray source and detector move across the patient, or region of interest, during image acquisition.

This contrasts with conventional or digital radiography systems, where a static source and detector are used, with a limited maximum field of view. In a conventional X-ray system, the X-ray beam emitted from the source has a conical shape, i. The beam can be collimated to cover only the region of interest ROI. The entire ROI is imaged in one exposure; hence, these systems are also referred to as full-field radiography systems. In LSSR the beam is shaped as it exits the source by passing it through a very narrow slot.

The resulting beam has a fan shape which spreads out only across the width of the detector, but is narrow in the scan direction. A further, tungsten collimator is used to trim the beam further in the scan direction.

Typically, the thickness of the fan beam in the scan direction is about 6 mm when it reaches the detector. This has the effect of limiting the number of secondary, poorer quality, photons that form the X-ray beam. This means that only the higher-quality, primary photons are used to form the X-ray image, and that there are far fewer scattered photons throughout the surrounding area.

judging from the ease and even pride with which public health officials now confess their wrongdoing, it's business as usual. Вернувшись квартиру после шопинга, молодая девчонка начала примерять новое нижнее белье и проверять его практичность и удобство.

" As he said, this he removed his robe and hung it upon the wall. Сначала она просто хотела показать свое тело в нижнем белье партнеру по средством фотографии. Умеет делать высококлассный минет, что и доказывает на практическом деле, ублажая своего мужика.

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Children with scoliosis have frequent upright x-ray examinations of the spine until they reach maturity. As a result, the thyroid gland, mammary glands, and gonads — the most radiosensitive organs of these patients — are exposed, resulting in potentially high cumulated effective radiation dose. Slot-scanning systems SSS can reduce the radiation dose exposure more than dynamic flat panel detector DFD systems, according to a study from France published online August 14, in Diagnostic and Interventional Imaging.

This was followed by a prospective observational dosimetric and qualitative comparative study of whole-spine x-ray images acquired by SSS for 31 children and DFD images of 26 children. Dosimetric statistical analysis was performed from dose area product DAP and entrance skin dose measured by thermo-luminescent dosimeters localized in the cervical thoracic, and sacral areas.

Three radiologists each independently assessed the diagnostic quality of the images, using statistical analysis of quality score and inter-observer reproducibility. For each whole-spine frontal radiograph that was taken of a scoliosis patient, acquisition was done with a postero-anterior beam. The acquired image included the base of the skull to the tip of the coccyx and extended from one iliac rest to the next. Exposure factors were recorded for tube voltage kV , intensity mAs , focal distance between tube and patient, and size of the radiation field at the surface of the child.

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Each child wore three pairs of Lithium Fluoride TLD, placed on the back in the most radiosensitive organs cervical, interscapular, and sacral to estimate the locally delivered irradiation.

The researchers used a list of 20 anatomical criteria from the European Guidelines on Quality for Diagnostic Radiographic Images appropriate for scoliosis imaging to rate diagnostic image quality.

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