Abstract
A simple prototype system for static two-dimensional soft X-ray imaging using silicon microstrip detectors irradiated at normal incidence is presented. Radiation sensors consist of single-sided silicon detectors made from 300μm thick wafers, read by RX64 ASICs. Data acquisition and control is performed by a Windows PC workstation running dedicated LabVIEW routines, connected to the sensors through a PCI-DIO-96 interface.Two-dimensional images are obtained by scanning a lead collimator with a thin slit perpendicular to the strip axis, along the whole detector size; the several strip profiles (slices) taken at each position are then put together to form a planar image.Preliminary results are presented, illustrating the high-resolution imaging capabilities of the system with soft X-rays.
Highlights
Medical X-ray imaging has seen considerable improvements in recent years with the advent of digital radiology, based on direct detection systemsP
Rato Mendes et al / Nuclear Instruments and Methods in Physics Research A 509 (2003) 333–339 such as flat-panel detectors, or indirect systems such as computed radiology image plates [1]. These new systems use solid-state detectors instead of film as radiation sensors, and perform better than standard film-cassette systems in terms of image contrast and resolution, with all the advantages of digital imaging processing and storage, and an additional reduction of dose delivered to the patient [2]
We present a simple prototype system for two-dimensional digital X-ray imaging using the silicon microstrip detectors and VLSI readout electronics developed for high-resolution dual-energy mammography and angiography, as presented by Ramello et al [3], but with X-rays hitting the silicon detectors perpendicularly
Summary
Medical X-ray imaging has seen considerable improvements in recent years with the advent of digital radiology, based on direct detection systems. P. Rato Mendes et al / Nuclear Instruments and Methods in Physics Research A 509 (2003) 333–339 such as flat-panel detectors, or indirect systems such as computed radiology image plates [1]. Rato Mendes et al / Nuclear Instruments and Methods in Physics Research A 509 (2003) 333–339 such as flat-panel detectors, or indirect systems such as computed radiology image plates [1] These new systems use solid-state detectors instead of film as radiation sensors, and perform better than standard film-cassette systems in terms of image contrast and resolution, with all the advantages of digital imaging processing and storage, and an additional reduction of dose delivered to the patient [2]. With low energy photons (less than 10 keV) a sufficient photoelectric conversion efficiency can be attained with thin detectors, and the simple geometry and readout of the system yields good imaging results
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