Results 41 to 50 of about 5,344,290 (172)

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

Phantom evaluation of small‐pixel effect in ultra‐high‐resolution photon‐counting CT: Noise texture and high‐contrast spatial resolution

Journal of Applied Clinical Medical Physics, Volume 27, Issue 9, September 2026.
Abstract Background Ultra‐high‐resolution (UHR) photon‐counting CT (PCCT) with small‐pixel detectors improves resolution and noise, but its dependence on diverse imaging conditions remains insufficiently characterized. Purpose To systematically evaluate the small‐pixel effect in UHR PCCT by assessing noise properties and high‐contrast spatial ...
Kyu‐Ho Song, Colin Shan, Gary Xu, Xinhui Duan, Yue Zhang, Kuan Zhang, Liqiang Ren   +6 more
wiley   +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

Spectral CTA-based quantitative differentiation of infarcted and non-infarcted ASPECTS regions in acute stroke

European Radiology Experimental
Objectives Spectral computed tomography (CT) enables material decomposition and monoenergetic imaging, improving infarct-estimation on non-contrast cerebral CT (NCCT). However, beyond NCCT, infarct estimation is also accessible from CT angiography (CTA).
Schekeb Aludin, Agreen Horr, Patrick Langguth, Tristan Klintz, Svea Seehafer, Alexander Gless, Karim Mostafa, Olav Jansen, Naomi Larsen, Lars-Patrick Schmill   +9 more
doaj   +1 more source

Low tube voltage increases the diagnostic performance of dual-energy computed tomography in patients with acute appendicitis

Diagnostic and Interventional Radiology, 2019
PURPOSEWe aimed to assess the utility of dual-energy computed tomography (DECT) imaging in diagnosing acute appendicitis (AA) with density measurements of the appendix vermiformis.METHODSA total of 210 consecutive patients presenting with acute abdominal
Çağdaş Topel, Mehmet Ruhi Onur, Erhan Akpınar, Ali Devrim Karaosmanoğlu, Deniz Akata, Muşturay Karçaaltıncaba   +5 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

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

Photon-counting detector CT allows significant reduction in radiation dose while maintaining image quality and noise on non-contrast chest CT

European Journal of Radiology Open, 2023
Purpose: To investigate if clinical non-contrast chest CT studies obtained with PCD CT using much lower radiation exposure can achieve the same image quality as with the currently established EID protocol.
Achala Donuru, Tetsuro Araki, Farouk Dako, Jaydev K. Dave, Raul Porto Perez, Dongming Xu, Arun C. Nachiappan, Eduardo Mortani Barbosa, Jr, Peter Noel, Harold Litt, Friedrich Knollman   +10 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