Low contrast 3D reconstruction from C-arm data

Zellerhoff, M.; Scholz, Bernhard; Ruehrnschopf, E.-P.; Brunner, Thomas

doi:10.1117/12.593433

Cited by 82 publications

(73 citation statements)

References 16 publications

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“…In CT, a variation of the tube voltage with projection angle is undesirable since the attenuation values will change when the beam energy changes; inconsistent measurements of attenuation and, in consequence, image artefacts would result. Therefore FD-CT is generally carried out with fixed voltage as is the case in clinical CT; automatic exposure control (AEC) modulates the tube current only and aims to achieve constant detector entrance dose over the scan range [13,14].…”

Section: Technology Of C-arm Fd-ct Systemsmentioning

confidence: 99%

Flat-detector computed tomography (FD-CT)

2007

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Flat-panel detectors or, synonymously, flat detectors (FDs) have been developed for use in radiography and fluoroscopy with the defined goal to replace standard X-ray film, filmscreen combinations and image intensifiers by an advanced sensor system. FD technology in comparison to X-ray film and image intensifiers offers higher dynamic range, dose reduction, fast digital readout and the possibility for dynamic acquisitions of image series, yet keeping to a compact design. It appeared logical to employ FD designs also for computed tomography (CT) imaging. Respective efforts date back a few years only, but FD-CT has meanwhile become widely accepted for interventional and intraoperative imaging using C-arm systems. FD-CT provides a very efficient way of combining two-dimensional (2D) radiographic or fluoroscopic and 3D CT imaging. In addition, FD technology made its way into a number of dedicated CT scanner developments, such as scanners for the maxillo-facial region or for micro-CT applications. This review focuses on technical and performance issues of FD technology and its full range of applications for CT imaging. A comparison with standard clinical CT is of primary interest. It reveals that FD-CT provides higher spatial resolution, but encompasses a number of disadvantages, such as lower dose efficiency, smaller field of view and lower temporal resolution. FD-CT is not aimed at challenging standard clinical CT as regards to the typical diagnostic examinations; but it has already proven unique for a number of dedicated CT applications, offering distinct practical advantages, above all the availability of immediate CT imaging in the interventional suite or the operating room.

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Section: Technology Of C-arm Fd-ct Systemsmentioning

confidence: 99%

Flat-detector computed tomography (FD-CT)

2007

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“…[11][12][13] Although currently available C-arm CT lacks the temporal resolution to assess cerebral blood flow (CBF) or mean transit time, it does provide spatial resolution and contrast sensitivity that should be adequate to measure levels of blood in brain parenchyma (ie, CBV). [14][15][16] Our purpose was to test the hypothesis that in normal canines, CBV could be measured by using C-arm CT and that these measurements would correlate with those made by using PCT.…”

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confidence: 99%

C-Arm CT Measurement of Cerebral Blood Volume: An Experimental Study in Canines

Ahmed¹,

Zellerhoff²,

Strother³

et al. 2009

AJNR Am J Neuroradiol

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“…Although scatter can be reduced by using narrow collimation, this may not be clinically practical if the location of the lesion is not known a priori. The correction approach implemented here estimates the primary radiation from the projection data by using an iterative method involving a multiplicative correction step, 19 and further improvements by using iterative techniques, hardware approaches, or a combination of the 2 are possible. [20][21][22][23][24][25][26][27][28][29][30] The number of views taken over a partial-circle scan can also be a limiting factor for image quality if insufficient angular sampling (ie, too large an angle between views) occurs.…”

Section: Creating Realistic Ich In a Swine: Presence Of Iodinated Conmentioning

confidence: 99%

Experimental Study of Intracranial Hematoma Detection with Flat Panel Detector C-Arm CT

Arakawa¹,

Marks²,

M.³

et al. 2008

AJNR Am J Neuroradiol

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BACKGROUND AND PURPOSE:Intracranial hemorrhage is a commonly acknowledged complication of interventional neuroradiology procedures, and the ability to image hemorrhage at the time of the procedure would be very beneficial. A new C-arm system with 3D functionality extends the capability of C-arm imaging to include soft-tissue applications by facilitating the detection of low-contrast objects. We evaluated its ability to detect small intracranial hematomas in a swine model.

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Low contrast 3D reconstruction from C-arm data

Cited by 82 publications

References 16 publications

Flat-detector computed tomography (FD-CT)

Flat-detector computed tomography (FD-CT)

C-Arm CT Measurement of Cerebral Blood Volume: An Experimental Study in Canines

Experimental Study of Intracranial Hematoma Detection with Flat Panel Detector C-Arm CT

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