Search Results - "Kolditz, Daniel"

Iterative reconstruction methods in X-ray CT by Beister, Marcel, Kolditz, Daniel, Kalender, Willi A

“…Abstract Iterative reconstruction (IR) methods have recently re-emerged in transmission x-ray computed tomography (CT). They were successfully used in the…”
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Fast on-site Monte Carlo tool for dose calculations in CT applications by Chen, Wei, Kolditz, Daniel, Beister, Marcel, Bohle, Robert, Kalender, Willi A.

“…Purpose: Monte Carlo (MC) simulation is an established technique for dose calculation in diagnostic radiology. The major drawback is its high computational…”
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A formulation of tissue- and water-equivalent materials using the stoichiometric analysis method for CT-number calibration in radiotherapy treatment planning by Yohannes, Indra, Kolditz, Daniel, Langner, Oliver, Kalender, Willi A

“…Tissue- and water-equivalent materials (TEMs) are widely used in quality assurance and calibration procedures, both in radiodiagnostics and radiotherapy. In…”
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Dose Optimization for Computed Tomography Localizer Radiographs for Low-Dose Lung Computed Tomography Examinations by Schmidt, Bernhard T, Hupfer, Martin, Saltybaeva, Natalia, Kolditz, Daniel, Kalender, Willi A

“…INTRODUCTIONRecent studies have shown a substantial reduction of radiation dose from computed tomography (CT) scans down to 0.1 mSv for lung cancer screening…”
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Radiation dose estimates based on Monte Carlo simulation for spiral breast computed tomography imaging in a large cohort of patients by Shim, Sojin, Kolditz, Daniel, Steiding, Christian, Ruth, Veikko, Hoetker, Andreas M., Unkelbach, Jan, Boss, Andreas

“…Background Spiral breast computed tomography (BCT) equipped with a photon‐counting detector (PCD) is a new radiological modality allowing for the…”
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A quality assurance framework for the fully automated and objective evaluation of image quality in cone-beam computed tomography by Steiding, Christian, Kolditz, Daniel, Kalender, Willi A.

“…Purpose: Thousands of cone-beam computed tomography (CBCT) scanners for vascular, maxillofacial, neurological, and body imaging are in clinical use today, but…”
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Investigation of spectral performance for single‐scan contrast‐enhanced breast CT using photon‐counting technology: A phantom study by Ruth, Veikko, Kolditz, Daniel, Steiding, Christian, Kalender, Willi A.

“…Purpose Contrast‐enhanced imaging of the breast is frequently used in breast MRI and has recently become more common in mammography. The purpose of this study…”
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Technical feasibility proof for high-resolution low-dose photon-counting CT of the breast by Kalender, Willi A., Kolditz, Daniel, Steiding, Christian, Ruth, Veikko, Lück, Ferdinand, Rößler, Ann-Christin, Wenkel, Evelyn

“…X-ray computed tomography (CT) has been proposed and evaluated multiple times as a potentially alternative method for breast imaging. All efforts shown so far…”
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Volume-of-interest (VOI) imaging in C-arm flat-detector CT for high image quality at reduced dose by Kolditz, Daniel, Kyriakou, Yiannis, Kalender, Willi A.

“…Purpose: A novel method for flat-detector computed tomography was developed to enable volume-of-interest (VOI) imaging at high resolution, low noise, and…”
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Assessment of patient dose from CT localizer radiographs by Schmidt, Bernhard, Saltybaeva, Natalia, Kolditz, Daniel, Kalender, Willi A.

“…Purpose: With recently introduced technical innovations for CT systems, the dose of CT scan acquisitions has been substantially reduced; even effective dose…”
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High Atomic Number Contrast Media Offer Potential for Radiation Dose Reduction in Contrast-Enhanced Computed Tomography by Roessler, Ann-Christin, Hupfer, Martin, Kolditz, Daniel, Jost, Gregor, Pietsch, Hubertus, Kalender, Willi A

“…OBJECTIVESSpectral optimization of x-ray computed tomography (CT) has led to substantial radiation dose reduction in contrast-enhanced CT studies using…”
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High-resolution spiral CT of the breast at very low dose: concept and feasibility considerations by Kalender, Willi A., Beister, Marcel, Boone, John M., Kolditz, Daniel, Vollmar, Sabrina V., Weigel, Michaela C. C.

“…Objective Mammography, today’s standard imaging approach, has deficits with respect to the superimposition of anatomical structures. Dedicated CT of the breast…”
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Metal Artifact Reduction in X-ray Computed Tomography Using Computer-Aided Design Data of Implants as Prior Information by Ruth, Veikko, Kolditz, Daniel, Steiding, Christian, Kalender, Willi A

“…OBJECTIVESThe performance of metal artifact reduction (MAR) methods in x-ray computed tomography (CT) suffers from incorrect identification of metallic…”
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Dosimetry concepts for scanner quality assurance and tissue dose assessment in micro-CT by Hupfer, Martin, Kolditz, Daniel, Nowak, Tristan, Eisa, Fabian, Brauweiler, Robert, Kalender, Willi A.

“…Purpose: At present, no established methods exist for dosimetry in micro computed tomography (micro-CT). The purpose of this study was therefore to investigate…”
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Effect of shaped filter design on dose and image quality in breast CT by Lück, Ferdinand, Kolditz, Daniel, Hupfer, Martin, Kalender, Willi A

“…The purpose of this study was to investigate the effect of shaped filters specifically designed for dedicated breast computed tomography (CT) scanners on dose…”
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Semiempirical analysis of materials' elemental composition to formulate tissue-equivalent materials: a preliminary study by Yohannes, Indra, Kolditz, Daniel, Kalender, Willi A

“…Tissue-equivalent materials are used for simplifying quality control and quality assurance procedures, both in diagnostic and therapeutic radiology. Important…”
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Performance of Photon-Counting Breast Computed Tomography, Digital Mammography, and Digital Breast Tomosynthesis in Evaluating Breast Specimens by Rößler, Ann-Christin, Kalender, Willi, Kolditz, Daniel, Steiding, Christian, Ruth, Veikko, Preuss, Caroline, Peter, Sandra Christina, Brehm, Barbara, Hammon, Matthias, Schulz-Wendtland, Rüdiger, Wenkel, Evelyn

“…Rationale and Objectives This study compared a novel photon-counting breast computed tomography (pcBCT) system with digital mammography (DM) and digital breast…”
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Assessment of patient dose from CT localizer radiographs: Assessment of patient dose from CT localizer radiograph by Schmidt, Bernhard, Saltybaeva, Natalia, Kolditz, Daniel, Kalender, Willi A.

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Experimental validation of a single shaped filter approach for CT using variable source-to-filter distance for examination of arbitrary object diameters by Lück, Ferdinand, Kolditz, Daniel, Hupfer, Martin, Steiding, Christian, Kalender, Willi A

“…The purpose of this study was to validate the use of a single shaped filter (SF) for computed tomography (CT) using variable source-to-filter distance (SFD)…”
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Comparison of extended field-of-view reconstructions in C-arm flat-detector CT using patient size, shape or attenuation information by Kolditz, Daniel, Meyer, Michael, Kyriakou, Yiannis, Kalender, Willi A

“…In C-arm-based flat-detector computed tomography (FDCT) it frequently happens that the patient exceeds the scan field of view (SFOV) in the transaxial…”
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