Spectral imaging

Abstract

An imaging system includes radiation source (106) that emits radiation that traverses an examination region and a portion of a subject therein and a detector array (114) that detects radiation that traverses the examination region and the portion of the subject therein and generates a signal indicative thereof. A volume scan parameter recommender (120) recommends at least one spectral scan parameter value for a volume scan of the portion of the subject based on a spectral decomposition of first and second 2D projections acquired by the radiation source and detector array. The first and second 2D projections have different spectral characteristics. A console (122) employs the recommended at least one spectral scan parameter value to perform the volume scan of the portion of the subject.

Description

technical field [0001] The following generally relates to spectral imaging, and more specifically to determining the spectral peak value for a spectrum based on two or more two-dimensional (2D) projection scans (scanned images) performed at two or more kVp from approximately the same acquisition viewing angle. Appropriate tube voltages for plethysmography, and are described below in connection with specific applications to computed tomography (CT). Background technique [0002] Conventional CT scanners typically include an x-ray tube mounted on a rotatable gantry opposite a detector array across the examination region. The rotatable gantry and thus the X-ray tube rotates around the examination area. The x-ray tube emits radiation that is detected by the detector array through the examination region and parts of the object therein. The detector array generates and outputs a signal indicative of the scanned portion of the object. The signal is reconstructed to generate thre...

AI Technical Summary

Problems solved by technology

However, for larger objects, few 80kVp photons pass through the object, and the volumetric image data may be noisy and have reduced image quality

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