Elsevier eBooks, Journal Year: 2024, Volume and Issue: unknown, P. 167 - 240
Published: Jan. 1, 2024
British Journal of Radiology, Journal Year: 2023, Volume and Issue: 96(1152)
Published: Sept. 26, 2023
CT of the heart, in particular ECG-controlled coronary angiography (cCTA), has become clinical routine due to rapid technical progress with ever new generations equipment. Recently, scanners photon-counting detectors (PCD) have been introduced which potential address some remaining challenges for cardiac CT, such as limited spatial resolution and lack high-quality spectral data. In this review article, we briefly discuss principles detector give an overview on how improved availability data can benefit applications. We focus artery calcium scoring, cCTA, evaluation myocardium.
Language: Английский
Citations
32
Physics in Medicine and Biology, Journal Year: 2023, Volume and Issue: 68(17), P. 175007 - 175007
Published: July 28, 2023
Objective. Photon counting CT (PCCT) has been a research focus in the last two decades. Recent studies and advancements have demonstrated that systems using semiconductor-based photon detectors (PCDs) potential to provide better contrast, noise spatial resolution performance compared conventional scintillator-based systems. With multi-energy threshold detection, PCD can simultaneously energy measurement enable material decomposition for spectral imaging. In this work, we report evaluation of our first CdZnTe-based prototype full-size PCCT system through various phantom imaging studies.Approach.This supports 500 mm scan field-of-view 10 mmz-coverage at isocenter. Phantom scans were acquired 120 kVp from 50 400 mAs assess on: number accuracy, uniformity, noise, resolution, differentiation quantification.Main results.Both qualitative quantitative evaluations show PCCT, under tested conditions, superior with lower improved integrating detector (EID)-CT. Using projection domain approach multiple bin measurements, virtual monoenergetic images good accuracy quantifying iodine calcium concentrations. These results lead increased contrast-to-noise ratio (CNR) both high low contrast study objects EID-CT matched dose resolution. also generate super-high much smaller pixel size than greatly improve image resolution.Significance.Improved quantification reduced potentially diagnosis radiation EID-CT. Increased CNR achieved by suggests reduction media load, resulting patient safety cost.
Language: Английский
Citations
25
Diagnostic and Interventional Imaging, Journal Year: 2024, Volume and Issue: unknown
Published: Sept. 1, 2024
In recent years, computed tomography (CT) has undergone a number of developments to improve radiological care. The most major innovation been the development photon-counting detectors. By comparison with energy-integrating detectors traditionally used in CT, these offer better dose efficiency, eliminate electronic noise, spatial resolution and have intrinsic spectral sensitivity. These also allow energy each photon be counted, thus improving sampling X-ray spectrum multiple bins, distinguish between photoelectric Compton attenuation coefficients, resulting images specific color K-edge images. purpose this article was make reader more familiar basic principles techniques new CT systems equipped describe currently available devices that could clinical practice.
Language: Английский
Citations
10
Diagnostic and Interventional Imaging, Journal Year: 2024, Volume and Issue: 105(9), P. 311 - 318
Published: March 1, 2024
Language: Английский
Citations
9
European Journal of Radiology, Journal Year: 2025, Volume and Issue: 184, P. 111964 - 111964
Published: Feb. 2, 2025
To improve the image quality of brachial plexus in photon-counting detector CT (PCD-CT) using contrast media and virtual monoenergetic images (VMI). We retrospectively analyzed contrast-enhanced neck PCD-CT scanned March-July 2023. Unenhanced were compared, then 40-, 70-, 100-keV VMIs compared. The qualitative evaluation used a five-point Likert scale regarding overall (IQ), sharpness, noise. quantitative standard deviation (SD), signal-to-noise ratio (SNR), contrast-to-noise (CNR). Freidman's test one-way ANOVA performed. Forty patients (65 years ± 17, 21 males) included. median scores [interquartile range, IQR] for unenhanced groups IQ, 3 [2,3] 4 [3,4] (P < 0.001); noise, = 0.63). Mean SD SD, 6.7 1.4 1.0 0.95); SNR, 5.1 1.2 5.4 0.04); CNR, 4.8 1.5 8.1 2.3 0.001). groups' IQ 2 [2,3], [3,4], [3,4]; their sharpness (all, P 0.05). Those noise [1-3], 0.001 except 70-keV vs.100-keV: 0.16). SDs 13.1 2.5, 7.5 1.2, 6.0 1.1. SNRs 4.2 1.9, 5.0 5.7 CNRs 8.7 4.0, 6.8 2.3, 6.5 0.51). Contrast-enhanced provided good delineation plexus.
Language: Английский
Citations
1
Academic Radiology, Journal Year: 2023, Volume and Issue: 30(10), P. 2362 - 2382
Published: June 25, 2023
Language: Английский
Citations
19
European Journal of Radiology, Journal Year: 2024, Volume and Issue: 175, P. 111426 - 111426
Published: March 12, 2024
Language: Английский
Citations
5
Investigative Radiology, Journal Year: 2024, Volume and Issue: unknown
Published: Aug. 20, 2024
Development of spectral photon-counting computed tomography (SPCCT) for ultra-high-resolution coronary CT angiography (CCTA) has the potential to accurately evaluate arteries very-high-risk patients. The aim this study was compare diagnostic performances SPCCT against conventional quantifying stenosis in patients, with invasive (ICA) as reference method.
Language: Английский
Citations
5
Heart, Journal Year: 2025, Volume and Issue: unknown, P. heartjnl - 325790
Published: May 14, 2025
Photon-counting CT (PCCT) represents a transformative advancement in cardiac imaging, addressing key limitations of conventional CT. This review synthesises current evidence to demonstrate how PCCT’s superior spatial resolution, enhanced tissue characterisation and multienergy capabilities broaden the diagnostic potential Applications include precise detection quantification coronary artery calcifications, evaluation plaque burden composition, improved assessment stents, comprehensive myocardial perfusion analysis. By offering high-quality spectral information detailed characterisation, PCCT provides non-invasive alternative for assessing disease pathology, reducing need invasive angiography MRI. Despite ongoing challenges technology clinical implementation, has revolutionise cardiovascular diagnostics, optimise workflows enhance patient care through more accurate, streamlined assessments.
Language: Английский
Citations
0
The International Journal of Cardiovascular Imaging, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 4, 2024
Abstract We assessed the diagnostic performance of both ultra-high-resolution (UHR) and high-resolution (HR) modes photon-counting detector (PCD)-CT within confines standard pre-TAVI CT scans, as well UHR mode adjusted specifically for coronary imaging, using quantitative angiography (QCA) reference. included 60 patients undergoing planning scans. Patients were divided into 3 groups: 20 scanned in HR mode, on a dual-source PCD-CT. The employed lower tube voltage (90 kV vs. 120 kV) higher image quality level (65 34) to enhance artery visualization. underwent invasive part clinical routine. CCTA QCA reviewed assess CAD presence defined stenosis ≥ 50% proximal middle segments. (mean age 79 ± 7 years; 39(65%) men). Mean heart rate during scanning was 72 13 bpm. Median calcium score 973 [379–2007]. identified significant 24 (40%): 9 with 10 5 mode. Per-patient area under curves 0.57 HR, 0.80 UHR, no differences between scan modes, per-vessel 0.73 0.69 0.87 ( p = 0.04). dual source PCD-CT show potential improved sensitivity negative predictive value detecting however, statistically difference from observed.
Language: Английский
Citations
3