Results 51 to 60 of about 6,942,219 (182)

Feasibility of Reduced Iodine Loads for Vascular Assessment Prior to Transcatheter Aortic Valve Implantation (TAVI) Using Spectral Detector CT

Diagnostics
Reduced iodine loads for computed tomography (CT)-based vascular assessment prior to transcatheter aortic valve implantation (TAVI) may be feasible in conjunction with a spectral detector CT scanner.
Christopher Schuppert, Janek Salatzki, Florian André, Johannes Riffel, David L. Mangold, Claudius Melzig, Muhammad Taha Hagar, Hans-Ulrich Kauczor, Tim F. Weber, Fabian Rengier, Thuy D. Do   +10 more
doaj   +1 more source

Commissioning a single photon counting CT simulator for radiotherapy planning: Methods, challenges, and initial results

Journal of Applied Clinical Medical Physics, Volume 27, Issue 9, September 2026.
Abstract Background Photon counting computed tomography (PCCT) offers distinct advantages over standard energy‐integrated detector (EID) CT by offering energy‐resolved measurements, enhanced spatial resolution, and improved soft‐tissue contrast. While PCCT shows great utility in diagnostic imaging, its application as a radiotherapy simulator has not ...
Parminder S. Basran, Devon Richtsmeier
wiley   +1 more source

Quantum iterative reconstruction on a photon-counting detector CT improves the quality of hepatocellular carcinoma imaging

Cancer Imaging, 2023
Background Excellent image quality is crucial for workup of hepatocellular carcinoma (HCC) in patients with liver cirrhosis because a signature tumor signal allows for non-invasive diagnosis without histologic proof.
Dirk Graafen, Fabian Stoehr, Moritz C. Halfmann, Tilman Emrich, Friedrich Foerster, Yang Yang, Christoph Düber, Lukas Müller, Roman Kloeckner   +8 more
doaj   +1 more source

Obese patient imaging: Potential dose reduction with photon‐counting CT

Journal of Applied Clinical Medical Physics, Volume 27, Issue 8, August 2026.
Abstract Background Photon‐counting CT (PCCT) offers key advantages over energy integrating detector CT (EID‐CT), especially in low‐dose scans and imaging larger patients. As obesity rates rise, minimizing image noise is critical for diagnostic accuracy.
Leening P. Liu, Kai Mei, Shobhit Sharma, Steven Ross, Sandra S. Halliburton, Richard Thompson, Naruomi Akino, Ali H. Dhanaliwala, Leonid Roshkovan, Harold I. Litt, Peter B. Noël   +10 more
wiley   +1 more source

Value of spectral detector computed tomography for the early assessment of technique efficacy after microwave ablation of hepatocellular carcinoma.

PLoS ONE, 2021
ObjectivesTo investigate whether virtual monoenergetic images (VMI) and iodine maps derived from spectral detector computed tomography (SDCT) improve early assessment of technique efficacy in patients who underwent microwave ablation (MWA) for ...
Robert Peter Reimer, Nils Große Hokamp, Julius Niehoff, David Zopfs, Simon Lennartz, Mariam Heidar, Roger Wahba, Dirk Stippel, David Maintz, Daniel Pinto Dos Santos, Christian Wybranski   +10 more
doaj   +1 more source

K‐Edge imaging using a clinical dual‐source photon‐counting CT system

Journal of Applied Clinical Medical Physics, Volume 27, Issue 8, August 2026.
Abstract Background Photon‐counting CT (PCCT) enables K‐edge imaging, an advanced multi‐material decomposition technique that requires multiple energy bins to perform decomposition unconstrained by physical assumptions. The clinical implementation of K‐edge imaging applications like dual‐contrast imaging could lead to reductions in radiation dose and ...
Martin V. Rybertt, Leening P. Liu, Pooyan Sahbaee, Tristan Nowak, Manoj Mathew, Harold I. Litt, David P. Cormode, Ali H. Dhanaliwala, Peter B. Noël   +8 more
wiley   +1 more source

Evaluation of Hypervascular Focal Liver Lesions Utilizing Virtual Monoenergetic Images from Third-Generation Dual-Source Dual-Energy Computed Tomography

Journal of Gastrointestinal and Abdominal Radiology, 2022
Objectives The purpose of our study was to evaluate the virtual monochromatic imaging in detecting hypervascular focal liver lesions in the late arterial phase with third-generation dual-source dual-energy computed tomography and to assess its image ...
Niyas Narappulan, Venkatesh Kasi Arunachalam, Ezhilmathi Alavandar, Swathigha Selvaraja, Rupa Renganathan, Mathew Cherian   +5 more
doaj   +1 more source

Comparison of three commercial multi‐energy CT and electron density phantoms for iodine quantification and tissue substitute characterization

Journal of Applied Clinical Medical Physics, Volume 27, Issue 8, August 2026.
Abstract Background Multi‐energy computed tomography (MECT) and electron density (ED) phantoms are designed for evaluating the performance of CT scanners. They include substitute materials representing the energy‐ and material‐dependent CT numbers of different organs, tissues, or contrast agents.
Artur Omar, Robert Vorbau, Jens Zimmerman, Gavin Poludniowski   +3 more
wiley   +1 more source

A physics primer on photon‐counting detectors in CT: Physics, signal formation, and performance

Medical Physics, Volume 53, Issue 8, August 2026.
Abstract Photon‐counting detector CT (PCD‐CT) is moving from laboratory development to clinical deployment. However, its threshold‐bin data arise from a tightly coupled detector–readout chain that can be difficult to understand as a whole. These data are not a direct readout of photon energy, but the outcome of a sequence of physical and electronic ...
Guang‐Hong Chen, Ruiran Lai, Ke Li
wiley   +1 more source

Diagnostic Imaging Performance of Dual-Energy Computed Tomography Compared with Conventional Computed Tomography and Magnetic Resonance Imaging for Uterine Cervical Cancer

Indian Journal of Radiology and Imaging
Objective This article evaluates the ability of low-energy (40 keV) virtual monoenergetic images (VMIs) in the local diagnosis of cervical cancer compared with that of conventional computed tomography (C-CT) and magnetic resonance imaging (MRI)
Saki Shibuki, Tsukasa Saida, Kensaku Mori, Toshitaka Ishiguro, Taishi Amano, Miki Yoshida, Mariko Miyata, Toyomi Satoh, Takahito Nakajima   +8 more
doaj   +1 more source