Speed up of an analytical algorithm for nonuniform attenuation correction by using PC video/graphics card architecture

Wen, Junhai; Wang, Zigang; Li, Bin; Li, Tianfang; Zhang, Liang

doi:10.1109/tns.2004.829788

Cited by 10 publications

(8 citation statements)

References 12 publications

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“…With rapid development of the PC graphics card technologies, the reconstruction speed is expected to be further accelerated by newer generations of the GPU architecture in the near future [27]. Furthermore, by analytical compensation for the nonuniform attenuation and spatially variant PSF [14], [24] with the hardware-based acceleration [25], the reconstruction speed can be in real time for high-resolution dynamic SPECT imaging that uses array size far beyond 64 cubic.…”

Section: Discussionmentioning

confidence: 99%

“…In their OS-EM implementation, only attenuation compensation is considered for PH collimation. Our previous work [25] has shown more than ten times speedup for FBP-based VFF-collimated quantitative SPECT reconstruction. Preliminary results of speedup the OS-EM algorithm for VFF collimation was presented recently in a conference abstract [23].…”

Section: Introductionmentioning

confidence: 98%

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Speedup OS-EM image reconstruction by PC graphics card technologies for quantitative SPECT with varying focal-length fan-beam collimation

Wang

Han

et al. 2005

IEEE Trans. Nucl. Sci.

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In the paper, we present a new hardware acceleration method to speedup the ordered-subsets expectation-maximization (OS-EM) algorithm for quantitative SPECT (single photon emission computed tomography) image reconstruction with varying focal-length fan-beam (VFF) collimation. By utilizing the geometrical symmetry of VFF point-spread function (PSF), compensation for object-specific attenuation and system-specific PSF are accelerated using currently available PC video/graphics card technologies. A ten-fold acceleration of quantitative SPECT reconstruction is achieved.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Speedup OS-EM image reconstruction by PC graphics card technologies for quantitative SPECT with varying focal-length fan-beam collimation

Wang

Han

et al. 2005

IEEE Trans. Nucl. Sci.

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“…The primary difference in terms of reconstruction comes from the fact that SPECT tracers emit individual gamma photons, compared to PET's use of tracers that (after positron annihilation) emit two photons travelling in the opposite direction. Wen et al (2004) were the first to use a GPU to speedup filtered back projection reconstruction of SPECT images. This work was then extended to an iterative EM algorithm by Wang et al (2005), similar to work done by Beenhouwer et al (2006), Vetter and Westermann (2008) and Pedemonte et al (2010).…”

Section: Spectmentioning

confidence: 99%

Medical image processing on the GPU – Past, present and future

Eklund

Dufort

Forsberg

et al. 2013

Medical Image Analysis

348

198

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Graphics processing units (GPUs) are used today in a wide range of applications, mainly because they can dramatically accelerate parallel computing, are affordable and energy efficient. In the field of medical imaging, GPUs are in some cases crucial for enabling practical use of computationally demanding algorithms. This review presents the past and present work on GPU accelerated medical image processing, and is meant to serve as an overview and introduction to existing GPU implementations. The review covers GPU acceleration of basic image processing operations (filtering, interpolation, histogram estimation and distance transforms), the most commonly used algorithms in medical imaging (image registration, image segmentation and image denoising) and algorithms that are specific to individual modalities (CT, PET, SPECT, MRI, fMRI, DTI, ultrasound, optical imaging and microscopy). The review ends by highlighting some future possibilities and challenges.

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“…In VFF collimator geometry, the differential relationship for the coordinate change is d x r dφ = | J | dpdβ (12) where the Jacobian |J| is given by…”

Section: A Spatial-domain Inversion Formula For the Exponential Radonmentioning

confidence: 99%

“…Thereafter, extension of the inversion formula to fan-beam [7][8][9], varying focal-length fan-beam (VFF) [9,10], and conebeam [11] geometries has been attempted by various strategies. Although it is accurate for the extended inversion, the ray-driven strategy [7,10] is computationally expensive [12]. While the coordinate transform strategy in [8,11] offers a close-form solution under some assumptions, it is limited to the fixed focal-length geometries.…”

Section: Introductionmentioning

confidence: 99%

An inversion formula for the exponential Radon transform in spatial domain with variable focal‐length fan‐beam collimation geometry

Wen¹,

Zhang²

2006

Medical Physics

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Inverting the exponential Radon transform has a potential use for SPECT (single photon emission computed tomography) imaging in cases where a uniform attenuation can be approximated, such as in brain and abdominal imaging. Tretiak and Metz derived in the frequency domain an explicit inversion formula for the exponential Radon transform in two dimensions for parallel-beam collimator geometry. Progress has been made to extend the inversion formula for fan-beam and varying focal-length fan-beam (VFF) collimator geometries. These previous fan-beam and VFF inversion formulas require a spatially-variant filtering operation, which complicates the implementation and imposes a heavy computing burden. In this paper, we present an explicit inversion formula, in which a spatially-invariant filter is involved. The formula is derived and implemented in the spatial domain for VFF geometry (where parallel-beam and fan-beam geometries are two special cases). Phantom simulations mimicking SPECT studies demonstrate its accuracy in reconstructing the phantom images and efficiency in computation for the considered collimator geometries.

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Speed up of an analytical algorithm for nonuniform attenuation correction by using PC video/graphics card architecture

Cited by 10 publications

References 12 publications

Speedup OS-EM image reconstruction by PC graphics card technologies for quantitative SPECT with varying focal-length fan-beam collimation

Speedup OS-EM image reconstruction by PC graphics card technologies for quantitative SPECT with varying focal-length fan-beam collimation

Medical image processing on the GPU – Past, present and future

An inversion formula for the exponential Radon transform in spatial domain with variable focal‐length fan‐beam collimation geometry

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