Volume‐of‐interest (VOI) imaging in C‐arm flat‐detector CT for high image quality at reduced dose

Kolditz, Daniel; Kyriakou, Yiannis; Kalender, Willi A.

doi:10.1118/1.3427641

Cited by 60 publications

(66 citation statements)

References 27 publications

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“…In vitro, we are currently testing a 10-second dual-rotation protocol, which allows the acquisition of subtracted images during the injection of the contrast agent for better tracking of the contrast agent bolus and has image characteristics similar to those of the 20-second DynaCT. Furthermore, with the implementation of novel imaging techniques for FPD angiography suites in the near future, like the volume-of-interest imaging method proposed by Kolditz et al, 40 high image quality will be guaranteed within the volume of interest, while simultaneously reducing the cumulative patient dose.…”

Section: Discussionmentioning

confidence: 99%

Feasibility of Flat Panel Angiographic CT after Intravenous Contrast Agent Application in the Postoperative Evaluation of Patients with Clipped Aneurysms

Psychogios¹,

Wachter²,

Mohr³

et al. 2011

AJNR Am J Neuroradiol

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BACKGROUND AND PURPOSE: Important findings, such as aneurysm remnants or major arterial occlusion, can be detected on intra-or postoperative angiography after surgical clipping of intracranial aneurysms. The purpose of this study was to evaluate the feasibility of IV-ACT for the postoperative detection of residual aneurysms and parent vessel patency compared with IA-DSA, which was selected as the standard reference method.

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Section: Discussionmentioning

confidence: 99%

Feasibility of Flat Panel Angiographic CT after Intravenous Contrast Agent Application in the Postoperative Evaluation of Patients with Clipped Aneurysms

Psychogios¹,

Wachter²,

Mohr³

et al. 2011

AJNR Am J Neuroradiol

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“…These are referred to as interior tomography reconstruction algorithms. Alternatively, the peripheral regions of the patient cross section can be irradiated with greatly reduced dose levels, avoiding the severe truncation of the projection data (65,66). Reconstructed images have decreased quality outside the VOI but full image quality within the VOI (Fig 6).…”

Section: Voi Imaging and Interior Tomographymentioning

confidence: 99%

Achieving Routine Submillisievert CT Scanning: Report from the Summit on Management of Radiation Dose in CT

McCollough¹,

Chen²,

Kalender³

et al. 2012

Radiology

246

160

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“…Some methods [1][2][3][4][5][6][7] can provide exact or high accurate reconstruction for ROI imaging. But they require either a prior information in the object, or additional radiation dose, scans for determining patient outline.…”

Section: Introductionmentioning

confidence: 99%

Reconstruction from truncated projections in cone-beam CT using an efficient 1D filtering

Xia

Maier

Hofmann

et al. 2013

Medical Imaging 2013: Physics of Medical Imaging

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In X-ray imaging, a reduction of the field of view (FOV) is proportional to a reduction in radiation dose. The resulting truncation, however, is incompatible with conventional tomographic reconstruction algorithms. This problem has been studied extensively. Very recently, a novel method for region of interest (ROI) reconstruction from truncated projections with neither the use of prior knowledge nor explicit extrapolation has been published, named Approximated Truncation Robust Algorithm for Computed Tomography (ATRACT). It is based on a decomposition of the standard ramp filter into a 2D Laplace filtering (local operation) and a 2D Radon-based filtering step (non-local operation).The 2D Radon-based filtering that involves many interpolations complicates the filtering procedure in ATRACT, which essentially limits its practicality. In this paper, an optimization for this shortcoming is presented. That is to apply ATRACT in one dimension, which implies that we decompose the standard ramp filter into the 1D Laplace filter and a 1D convolutionbased filter. The convolution kernel was determined numerically by computing the 1D impulse response of the standard ramp filtering coupled with the second order anti-derivative operation. The proposed algorithm was evaluated by using a reconstruction benchmark test, a real phantom and a clinical data set in terms of spatial resolution, computational efficiency as well as robustness of correction quality.The evaluation outcomes were encouraging. The proposed algorithm showed improvement in computational performance with respect to the 2D ATRACT algorithm and furthermore maintained reconstructions of high accuracy in presence of data truncation.

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Volume‐of‐interest (VOI) imaging in C‐arm flat‐detector CT for high image quality at reduced dose

Abstract: The proposed VOI application with two scans is an effective way to ensure high image quality within the VOI while simultaneously reducing the cumulative patient dose.

Cited by 60 publications

References 27 publications

Feasibility of Flat Panel Angiographic CT after Intravenous Contrast Agent Application in the Postoperative Evaluation of Patients with Clipped Aneurysms

Feasibility of Flat Panel Angiographic CT after Intravenous Contrast Agent Application in the Postoperative Evaluation of Patients with Clipped Aneurysms

Achieving Routine Submillisievert CT Scanning: Report from the Summit on Management of Radiation Dose in CT

Reconstruction from truncated projections in cone-beam CT using an efficient 1D filtering

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