Purpose – Computer tomography (CT) for 3D reconstruction entails a huge number of coplanar fan‐beam projections for each of a large number of 2D slice images, and excessive radiation intensities and dosages. For some applications its rate of throughput is also inadequate. A technique for overcoming these limitations is outlined. Design methodology/approach – A novel method to reconstruct 3D surface models of objects is presented, using, typically, ten, 2D projective images. These images are generated by relative motion between this set of objects and a set of ten fanbeam X‐ray sources and sensors, with their viewing axes suitably distributed in 2D angular space. Findings – The method entails a radiation dosage several orders of magnitude lower than CT, and requires far less computational power. Experimental results are given to illustrate the capability of the technique Practical implications – The substantially lower cost of the method and, more particularly, its dramatically lower irradiation make it relevant to many applications precluded by current techniques Originality/value – The method can be used in many applications such as aircraft hold‐luggage screening, 3D industrial modelling and measurement, and it should also have important applications to medical diagnosis and surgery.
Sensor Review – Emerald Publishing
Published: Mar 1, 2005
Keywords: X‐rays; Modelling; Sensors
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