keyword
https://read.qxmd.com/read/38480567/diagnostic-performance-of-photon-counting-detector-ct-for-differentiation-between-adrenal-adenomas-and-metastases
#21
JOURNAL ARTICLE
Stefanie Bette, Franka Risch, Luca Canalini, Judith Becker, Eva V Leithner, Adrian Huber, Mark Haerting, Bertram Jehs, Claudia Wollny, Florian Schwarz, Kartikay Tehlan, Christian Scheurig-Muenkler, Thomas Wendler, Thomas Kroencke, Josua A Decker
OBJECTIVES: Aim of this study was to assess the value of virtual non-contrast (VNC) reconstructions in differentiating between adrenal adenomas and metastases on a photon-counting detector CT (PCD-CT). MATERIAL AND METHODS: Patients with adrenal masses and contrast-enhanced CT scans in portal venous phase were included. Image reconstructions were performed, including conventional VNC (VNCConv ) and PureCalcium VNC (VNCPC ), as well as virtual monochromatic images (VMI, 40-90 keV) and iodine maps...
March 14, 2024: European Radiology
https://read.qxmd.com/read/38480064/assessment-of-attenuation-properties-for-sla-and-sls-3d-printing-materials-in-x-ray-imaging-and-nuclear-medicine
#22
JOURNAL ARTICLE
Stefan Weber, Andreas Block, Felix Bärenfänger
In recent years, access to 3D printers has become increasingly affordable. Alongside industrial and private applications, the significance of 3D printing in the clinical context is also growing. For instance, 3D printing processes enable the production of individual anatomical models that can be used to support patient communication or aid in surgical planning. While filament 3D printing is common, stereolithography (SLA) and selective laser sintering (SLS) printing processes offer higher precision. For the use of 3D printing materials in radiology, understanding their attenuation properties concerning ionizing radiation is crucial...
March 12, 2024: Zeitschrift Für Medizinische Physik
https://read.qxmd.com/read/38479800/subarachnoid-iodine-leakage-on-dual-energy-computed-tomography-after-mechanical-thrombectomy-is-associated-with-malignant-brain-edema
#23
JOURNAL ARTICLE
Atsushi Ogata, Kuniaki Ogasawara, Masashi Nishihara, Ayako Takamori, Takashi Furukawa, Toshihiro Ide, Hiroshi Ito, Fumitaka Yoshioka, Yukiko Nakahara, Jun Masuoka, Haruki Koike, Hiroyuki Irie, Tatsuya Abe
BACKGROUND: Dual-energy computed tomography (DE-CT) can differentiate between hemorrhage and iodine contrast medium leakage following mechanical thrombectomy (MT) for acute ischemic stroke (AIS). We determined whether subarachnoid hemorrhage (SAH) and subarachnoid iodine leakage (SAIL) on DE-CT following MT were associated with malignant brain edema (MBE). METHODS: We analyzed the medical records of 81 consecutive anterior circulation AIS patients who underwent MT...
March 13, 2024: Journal of Neurointerventional Surgery
https://read.qxmd.com/read/38473818/monolacunary-wells-dawson-polyoxometalate-as-a-novel-contrast-agent-for-computed-tomography-a-comprehensive-study-on-in-vivo-toxicity-and-biodistribution
#24
JOURNAL ARTICLE
Marko Stojanović, Mirjana B Čolović, Jovana Lalatović, Aleksandra Milosavljević, Nada D Savić, Kilian Declerck, Branimir Radosavljević, Mila Ćetković, Tamara Kravić-Stevović, Tatjana N Parac-Vogt, Danijela Krstić
Polyoxotungstate nanoclusters have recently emerged as promising contrast agents for computed tomography (CT). In order to evaluate their clinical potential, in this study, we evaluated the in vitro CT imaging properties, potential toxic effects in vivo, and tissue distribution of monolacunary Wells-Dawson polyoxometalate, α2 -K10 P2 W17 O61 . 20H2 O (mono-WD POM). Mono-WD POM showed superior X-ray attenuation compared to other tungsten-containing nanoclusters (its parent WD-POM and Keggin POM) and the standard iodine-based contrast agent (iohexol)...
February 22, 2024: International Journal of Molecular Sciences
https://read.qxmd.com/read/38472968/dual-energy-ct-iodine-uptake-of-head-and-neck-definition-of-reference-values-in-a-big-data-cohort
#25
JOURNAL ARTICLE
Ibrahim Yel, Giuseppe Mauro Bucolo, Scherwin Mahmoudi, Vitali Koch, Aynur Gökduman, Tommaso D Angelo, Leon David Grünewald, Mirela Dimitrova, Katrin Eichler, Thomas J Vogl, Christian Booz
BACKGROUND: Despite a considerable amount of literature on dual-energy CT (DECT) iodine uptake of the head and neck, the physiologic iodine uptake of this region has not been defined yet. This study aims to establish reference values for the iodine uptake of healthy organs to facilitate clinical application. METHODS: Consecutive venous DECT scans of the head and neck were reviewed, and unremarkable exams were included ( n = 617). A total of 35 region of interest measurements were performed in 16 anatomical regions...
February 26, 2024: Diagnostics
https://read.qxmd.com/read/38471186/edge-illumination-spectral-phase-contrast-tomography
#26
JOURNAL ARTICLE
Luca Brombal, Fulvia Arfelli, Francesco Brun, Vittorio Di Trapani, Marco Endrizzi, Ralf Menk, Paola Perion, Luigi Rigon, Mara Saccomano, Giuliana Tromba, Alessandro Olivo
Following the rapid, but independent, diffusion of X-ray spectral and phase-contrast systems, this work demonstrates the first combination of spectral and phase-contrast computed tomography (CT) obtained by using the edge-illumination technique and a CdTe small-pixel (62 μm) spectral detector. A theoretical model is introduced, starting from a standard attenuation-based spectral decomposition and leading to spectral phase-contrast material decomposition. Each step of the model is followed by quantification of accuracy and sensitivity on experimental data of a test phantom containing different solutions with known concentrations...
March 12, 2024: Physics in Medicine and Biology
https://read.qxmd.com/read/38470449/no-gadolinium-k-edge-detected-on-the-first-clinical-photon-counting-computed-tomography-scanner
#27
JOURNAL ARTICLE
Erik Baubeta, Eva Laurin Gadsböll, Leon Will, Fredrik Holmquist, Marie-Louise Aurumskjöld
PURPOSE: This study aimed to elucidate whether gadolinium contrast in clinically relevant doses can be used with photon-counting computed tomography (PCCT) as an alternative contrast agent in clinical applications. MATERIAL/METHODS: A CTDI phantom with 3D printed rods filled with different concentrations of gadolinium and iodine contrast was scanned in a PCCT and an energy-integrated computed tomography (EICT). Attenuation values at different monoenergetic steps were extracted for each contrast concentration...
March 12, 2024: Journal of Applied Clinical Medical Physics
https://read.qxmd.com/read/38467266/novel-use-of-dynamic-mr-hydrography-to-rule-out-esophageal-perforation-post-atrial-fibrillation-ablation-in-a-patient-with-anaphylaxis-to-gadolinium
#28
Saed Alnaimat, Layla Nasr, Robert W W Biederman
Esophageal thermal injury is one of the most devastating complications of atrial radiofrequency ablation, and its diagnosis can be challenging. In this report, we highlight the novel use of free water as a contrast material to better visualize the esophageal lumen in a patient with anaphylaxis to Iodinated contrast media and Gadolinium who recently underwent atrial fibrillation ablation. This becomes particularly handy in patients with contrast allergy, and further emphasizes the role of multimodality imaging...
March 9, 2024: Magnetic Resonance Imaging
https://read.qxmd.com/read/38466257/recurrent-localized-erythema-scarlatiniforme-desquamativum-recidivans-induced-by-iodinated-contrast-media
#29
JOURNAL ARTICLE
Leyla Barakat, Marie Lagreula, Raphaël Zermati, Félix Laborier, Anca Mirela Chiriac, Catherine Neukirch
No abstract text is available yet for this article.
March 8, 2024: Journal of Allergy and Clinical Immunology in Practice
https://read.qxmd.com/read/38462824/feasibility-of-weight-based-tube-voltage-and-iodine-delivery-rate-for-coronary-artery-ct-angiography
#30
JOURNAL ARTICLE
Ying Wang, Yan Zhang, Aihui Di, Qizheng Wang, Yongye Chen, Huishu Yuan, Ning Lang
PURPOSE: The objective of this study was to evaluate the feasibility of weight-based tube voltage and iodine delivery rate (IDR) for coronary artery CT angiography (CCTA). METHODS: A total of 193 patients (mean age: 58 ± 12 years) with suspected coronary heart disease indicated for CCTA between May and October 2022 were prospectively enrolled. The subjects were divided into five groups according to body weight: < 60 kg, 60 - 69 kg, 70 - 79 kg, 80 - 89 kg, and ≥ 90 kg...
March 7, 2024: Current medical imaging
https://read.qxmd.com/read/38462355/-the-application-of-setting-tube-voltage-and-iodine-delivery-rate-in-weight-grouped-for-reducing-the-radiation-and-contrast-medium-dose-in-coronary-ct-angiography
#31
JOURNAL ARTICLE
Y Zhang, J X Wu, Y Wang, H S Yuan
Objective: To evaluate the application value of reducing tube voltage and iodine delivery rate according to body weight in coronary CT angiography (CCTA). Methods: A prospective randomized controlled study. A total of 297 subjects, 172 males and 125 females, aged [ M ( Q 1 , Q 3 )]60.0 (50.0, 68.0) years, who underwent CCTA examination in Peking University Third Hospital due to clinically suspected coronary heart disease from May to December 2022 were included. According to the odd or even visit dates, the subjects were randomly divided into test group ( n =156) and control group ( n =141)...
March 12, 2024: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://read.qxmd.com/read/38461060/dual-energy-ct-bridging-the-gap-between-innovation-and-clinical-practice
#32
EDITORIAL
Paul Calame, Sébastien Mulé
No abstract text is available yet for this article.
March 8, 2024: Diagnostic and Interventional Imaging
https://read.qxmd.com/read/38458504/procedural-blood-pressure-and-contrast-extravasation-on-dual-energy-computed-tomography-after-endovascular-stroke-treatment
#33
JOURNAL ARTICLE
M M Q Robbe, F M E Pinckaers, R G C Santegoeds, M J Bos, R J van Oostenbrugge, W H van Zwam, J Staals, A A Postma
BACKGROUND: Blood brain barrier disruption (BBBD) can be visualized by contrast extravasation (CE) after endovascular treatment (EVT) in patients with acute ischemic stroke. Elevated blood pressure is a risk factor for BBBD. However, the association between procedural blood pressure and CE post-EVT is unknown. METHODS: In this single-center retrospective study, we analyzed 501 eligible patients who received a dual energy CT (DECT) immediately post-EVT for acute ischemic stroke...
March 6, 2024: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://read.qxmd.com/read/38457038/safety-of-non-ionic-contrast-media-in-ct-examinations-for-out-patients-retrospective-multicenter-analysis-of-473-482-patients
#34
JOURNAL ARTICLE
Wen Zeng, Jing Tang, Xu Xu, Yu Zhang, Lingming Zeng, Yiteng Zhang, Zejun Liang, Chunchao Xia, Lihong Zhao, Zhenlin Li
OBJECTIVES: This study aimed to explore the incidence of and potential risk factors for adverse drug reactions (ADRs) after non-ionic iodinated contrast media (NICM) administration for CT exams in out-patient settings in China. MATERIALS AND METHODS: A total of 473,482 out-patients who underwent intravenous NICM between January 1st, 2017, and Dec 31st, 2021, were retrospectively enrolled from three institutions. The occurrence of ADRs and clinical information were recorded...
March 8, 2024: European Radiology
https://read.qxmd.com/read/38449915/type-iii-kounis-syndrome-caused-by-iodine-contrast-media-after-improvement-of-allergic-symptoms
#35
Ryuichiro Okuda, Shu Utsumi, Hideki Tanaka, Tatsuo Takama, Yasuyuki Kakihana
Kounis syndrome is an acute coronary syndrome (ACS) caused by an allergic reaction that almost always occurs immediately and simultaneously with allergic symptoms. We present a case of Kounis syndrome type III that developed after complete resolution of contrast-induced anaphylaxis in a 60-year-old man with a coronary stent placed in the proximal left anterior descending (LAD) artery branch for ischemic heart disease. Contrast-enhanced computed tomography revealed anaphylactic shock. Symptoms quickly improved with intramuscular adrenaline injection; however, chest pain appeared after approximately 30 min...
March 2024: Curēus
https://read.qxmd.com/read/38448759/effects-of-intravenous-infusion-of-iodine-contrast-media-on-the-tracheal-diameter-and-lung-volume-measured-with-deep-learning-based-algorithm
#36
JOURNAL ARTICLE
Koichiro Yasaka, Hiroyuki Saigusa, Osamu Abe
This study aimed to investigate the effects of intravenous injection of iodine contrast agent on the tracheal diameter and lung volume. In this retrospective study, a total of 221 patients (71.1 ± 12.4 years, 174 males) who underwent vascular dynamic CT examination including chest were included. Unenhanced, arterial phase, and delayed-phase images were scanned. The tracheal luminal diameters at the level of the thoracic inlet and both lung volumes were evaluated by a radiologist using a commercial software, which allows automatic airway and lung segmentation...
March 6, 2024: J Imaging Inform Med
https://read.qxmd.com/read/38447099/carbon-iodine-polydiacetylene-nanofibers-for-image-guided-radiotherapy-and-tumor-microenvironment-enhanced-radiosensitization
#37
JOURNAL ARTICLE
Mingming Yin, Ye Yuan, Yongbiao Huang, Xiaoming Liu, Fanling Meng, Liang Luo, Sidan Tian, Bo Liu
Radiotherapy is a mainstay treatment used in clinics for locoregional therapy, although it still represents a great challenge to improve the sensitivity and accuracy of radiotherapy for tumors. Here, we report the conjugated polymer, polydiiododiacetylene (PIDA), with an iodine content of 84 wt %, as a highly effective computed tomography (CT) contrast agent and tumor microenvironment-responsive radiosensitizer. PIDA exhibited several key properties that contribute to the improvement of precision radiotherapy...
March 6, 2024: ACS Nano
https://read.qxmd.com/read/38441632/multimodality-imaging-features-of-small-bowel-cancers-complicating-crohn-s-disease-a-pictorial-review
#38
REVIEW
Francesco Paparo, Nicola Panvini, Amedeo Montale, Maria Pigati, Eugenio Marinaro, Enrico Francesco Melani, Arnoldo Piccardo, Lucio Molini
Patients with Crohn's disease (CD) are at increased risk of developing small bowel cancer, since chronic inflammation may trigger the histopathological sequence that begins from low-grade dysplasia of the intestinal epithelium and may eventually lead to malignant transformation. Owing to their location in a portion of the gastrointestinal tract which is not easily accessible to conventional endoscopic techniques, the detection of CD-related small bowel cancers is still a clinical challenge. The radiological features of CD-related small bowel adenocarcinoma (SBA) in patients with CD have been described in some previous studies, including its appearance in both CT and MRI examinations...
March 5, 2024: Abdominal Radiology
https://read.qxmd.com/read/38438942/policies-and-practices-regarding-preparative-fasting-for-contrast-enhanced-computed-tomography-a-nationwide-survey
#39
JOURNAL ARTICLE
Jianjie Li, Li Cai, Li Zhao, Junling Liu, Fang Lan, Yuan Li, Heng Liu, Xue Li
OBJECTIVES: To evaluate current policies and practices regarding preparative fasting before contrast-enhanced computed tomography (CECT) and the knowledge and attitudes of radiology head nurses. METHODS: Radiology head nurses in 499 Chinese hospitals participated in an online survey on preparative fasting for CECT, which mainly included current departmental policies and practices and their knowledge and attitudes. RESULTS: Response rate was 89...
March 4, 2024: Journal of Computer Assisted Tomography
https://read.qxmd.com/read/38438474/opportunistic-screening-with-multiphase-contrast-enhanced-dual-layer-spectral-ct-for-osteoblastic-lesions-in-prostate-cancer-compared-with-bone-scintigraphy
#40
JOURNAL ARTICLE
Ming-Cheng Liu, Chi-Chang Ho, Yen-Ting Lin, Jyh-Wen Chai, Siu-Wan Hung, Chen-Hao Wu, Jian-Ri Li, Yi-Jui Liu
Our study aimed to compare bone scintigraphy and dual-layer detector spectral CT (DLCT) with multiphase contrast enhancement for the diagnosis of osteoblastic bone lesions in patients with prostate cancer. The patients with prostate cancer and osteoblastic bone lesions detected on DLCT were divided into positive bone scintigraphy group (pBS) and negative bone scintigraphy group (nBS) based on bone scintigraphy. A total of 106 patients (57 nBS and 49 pBS) was included. The parameters of each lesion were measured from DLCT including Hounsfield unit (HU), 40-140 keV monochromatic HU, effective nuclear numbers (Zeff ), and Iodine no water (InW) value in non-contrast phase (N), the arterial phase (A), and venous phase (V)...
March 4, 2024: Scientific Reports
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