Three-Dimensional Object Reconstruction from Compton Scattered Gamma-Ray Data
نویسندگان
چکیده
A new imaging principle for object reconstruction is proposed in Single Photon Emission Computer Tomography (SPECT) which is widely used in nuclear medicine. The quality of SPECT images is largely affected by many adverse factors among which chiefly Compton scattering of gamma rays. Recently we have proposed to exploit Compton scattered radiation to generate new data necessary for object reconstruction, instead of discarding it as usually done. This has led us to a new underlying imaging principle based on the inversion of a generalized Radon transform. In this new three-dimensional reconstruction method both signal to noise ratio and image quality are improved. Remarkably the complete data, collected at various angles of scattering, can be obtained by a motionless data taking gamma camera. Examples of object reconstruction are presented as illustrations.
منابع مشابه
ar X iv : a st ro - p h / 04 12 04 7 v 1 2 D ec 2 00 4 Development of an advanced Compton camera with gaseous TPC and scintillator
A prototype of the MeV gamma-ray imaging camera based on the full reconstruction of the Compton process has been developed. This camera consists of a micro-TPC that is a gaseous Time Projection Chamber (TPC) and scintillation cameras. With the information of the recoil electrons and the scattered gamma-rays, this camera detects the energy and incident direction of each incident gamma-ray. We de...
متن کاملNovel approach to stationary transmission scanning using Compton scattered radiation.
Transmission scanning-based estimation of the attenuation map plays a crucial role in quantitative radionuclide imaging. X-ray computed tomography (CT) reconstructs directly the attenuation coefficients map from data transmitted through the object. This paper proposes an alternative route for reconstructing the object attenuation map by exploiting Compton scatter of transmitted radiation from a...
متن کاملGamma-ray energy-imaging integrated spectral deconvolution
In conventional Compton camera systems, the image reconstruction is performed only in two-dimensional or three-dimensional spatial coordinates for a specific gamma-ray energy. By doing so, a priori knowledge of the incident gamma-ray energy is required, and usually an energy window is applied to select full energy deposition events. In some other applications, spectral-deconvolution algorithms ...
متن کاملTowards a new concept for high sensitivity Compton scatter emission imaging
A new efficient scheme for imaging gamma-ray emitting objects is advocated in this work. A few years back we have put forward the idea of collecting data on Compton scattered rays to reconstruct an object in three dimensions and shown how it works with a collimated detector. To increase drastically the sensitivity of this modality as well as its field of view and resolution we propose now that ...
متن کاملCompton scattering sequence reconstruction algorithm for the liquid xenon gamma - ray imaging telescope ( LXeGRIT )
The Liquid Xenon Gamma-Ray Imaging Telescope (LXeGRIT) is a balloon born experiment sensitive to γ–rays in the energy band of 0.2–20 MeV. The main detector is a time projection chamber filled with high purity liquid xenon (LXeTPC), in which the three–dimensional location and energy deposit of individual γ–ray interactions are accurately measured in one homogeneous volume. To determine the γ–ray...
متن کامل