journal
Journals Journal of Computer Assisted T...

Journal of Computer Assisted Tomography

https://read.qxmd.com/read/37657076/radiologists-rating-for-comparative-qualitative-assessment-of-intravoxel-incoherent-motion-using-novel-analysis-methods
#1
JOURNAL ARTICLE
Esha Baidya Kayal, Devasenathipathy Kandasamy, Richa Yadav, Kedar Khare, Sameer Bakhshi, Raju Sharma, Amit Mehndiratta
OBJECTIVE: The objective was to assess qualitative interpretability and quantitative precision and reproducibility of intravoxel incoherent motion (IVIM) parametric images evaluated using novel IVIM analysis methods for diagnostic accuracy. METHODS: Intravoxel incoherent motion datasets of 55 patients (male/female = 41:14; age = 17.8 ± 5.5 years) with histopathology-proven osteosarcoma were analyzed. Intravoxel incoherent motion parameters-diffusion coefficient (D), perfusion fraction (f), and perfusion coefficient (D*)-were estimated using 5 IVIM analysis methods-(i) biexponential (BE) model, (ii) BE-segmented fitting 2-parameter (BESeg-2), (iii) BE-segmented fitting 1-parameter (BESeg-1), (iv) BE model with total variation penalty function (BE + TV), and (v) BE model with Huber penalty function (BE + HPF)...
September 4, 2023: Journal of Computer Assisted Tomography
https://read.qxmd.com/read/37657068/artificial-intelligence-iterative-reconstruction-in-computed-tomography-angiography-an-evaluation-on-pulmonary-arteries-and-aorta-with-routine-dose-settings
#2
JOURNAL ARTICLE
Huan Gong, Liying Peng, Xiangdong Du, Jiajia An, Rui Peng, Rui Guo, Xu Ma, Sining Xiong, Qin Ma, Guozhi Zhang, Jing Ma
OBJECTIVE: The objective of this study is to investigate whether a newly introduced deep learning-based iterative reconstruction algorithm, namely, the artificial intelligence iterative reconstruction (AIIR), has a clinical value in computed tomography angiography (CTA), especially for visualizing vascular structures and related lesions, with routine dose settings. METHODS: A total of 63 patients were retrospectively collected from the triple rule-out CTA examinations, where both pulmonary and aortic data were available for each patient and were taken as the example for investigation...
September 1, 2023: Journal of Computer Assisted Tomography
https://read.qxmd.com/read/37654056/dynamic-susceptibility-contrast-enhanced-perfusion-weighted-imaging-in-differentiation-between-recurrence-and-pseudoprogression-in-high-grade-glioma-a-meta-analysis
#3
JOURNAL ARTICLE
Xindong Gu, Xining He, Hualong Wang, Jianhua Li, Ruwei Chen, Hongen Liu
INTRODUCTION: In glioma patients that have undergone surgical tumor resection, the ability to reliably distinguish between pseudoprogression (PsP) and a recurrent tumor (RT) is of key clinical importance. Accordingly, this meta-analysis evaluated the utility of dynamic susceptibility contrast-enhanced perfusion-weighted imaging as a means of distinguishing between PsP and RT when analyzing patients with high-grade glioma. MATERIALS AND METHODS: The PubMed, Web of Science, and Wanfang databases were searched for relevant studies...
September 1, 2023: Journal of Computer Assisted Tomography
https://read.qxmd.com/read/37621087/deep-learning-image-reconstruction-algorithm-for-ccta-image-quality-assessment-and-clinical-application
#4
JOURNAL ARTICLE
Federica Catapano, Costanza Lisi, Giovanni Savini, Marzia Olivieri, Stefano Figliozzi, Alessandra Caracciolo, Lorenzo Monti, Marco Francone
OBJECTIVE: The increasing number of coronary computed tomography angiography (CCTA) requests raised concerns about dose exposure. New dose reduction strategies based on artificial intelligence have been proposed to overcome limitations of iterative reconstruction (IR) algorithms. Our prospective study sought to explore the added value of deep-learning image reconstruction (DLIR) in comparison with a hybrid IR algorithm (adaptive statistical iterative reconstruction-veo [ASiR-V]) in CCTA, even in clinical challenging scenarios, as obesity, heavily calcified vessels and coronary stents...
August 24, 2023: Journal of Computer Assisted Tomography
https://read.qxmd.com/read/37621082/fast-quantitative-magnetic-resonance-imaging-evaluation-of-hydrocephalus-using-3-dimensional-fluid-attenuated-inversion-recovery-initial-experience
#5
JOURNAL ARTICLE
Hyun Woo Goo, Sang Hyub Park
OBJECTIVE: This study aimed to demonstrate the initial experience of using fast quantitative magnetic resonance imaging (MRI) to evaluate hydrocephalus. METHODS: A total of 109 brain MRI volumetry examinations (acquisition time, 7 minutes 30 seconds) were performed in 72 patients with hydrocephalus. From the measured ventricular system and brain volumes, ventricle-brain volume percentage was calculated to standardize hydrocephalus severity (processing time, <5 minutes)...
August 24, 2023: Journal of Computer Assisted Tomography
https://read.qxmd.com/read/37574664/the-feasibility-of-deep-learning-based-reconstruction-for-low-tube-voltage-ct-angiography-for-transcatheter-aortic-valve-implantation
#6
JOURNAL ARTICLE
Tsukasa Kojima, Yuzo Yamasaki, Yuko Matsuura, Ryoji Mikayama, Takashi Shirasaka, Masatoshi Kondo, Takeshi Kamitani, Toyoyuki Kato, Kousei Ishigami, Hidetake Yabuuchi
OBJECTIVE: The purpose of this study is to evaluate the efficacy of deep learning reconstruction (DLR) on low-tube-voltage computed tomographic angiography (CTA) for transcatheter aortic valve implantation (TAVI). METHODS: We enrolled 30 patients who underwent TAVI-CT on a 320-row CT scanner. Electrocardiogram-gated coronary CTA (CCTA) was performed at 100 kV, followed by nongated aortoiliac CTA at 80 kV using a single bolus of contrast material. We used hybrid-iterative reconstruction (HIR), model-based IR (MBIR), and DLR to reconstruct these images...
August 11, 2023: Journal of Computer Assisted Tomography
https://read.qxmd.com/read/37574655/imaging-of-fontan-associated-liver-disease
#7
JOURNAL ARTICLE
Mark J Brown, Amy B Kolbe, Nathan C Hull, Moira Hilscher, Patrick S Kamath, Mariana Yalon, Chris N Gu, Ali Dean T Amawi, Sudhakar K Venkatesh, Michael L Wells
The Fontan procedure is the definitive treatment for patients with single-ventricle physiology. Surgical advances have led to a growing number of patients surviving into adulthood. Fontan-associated liver disease (FALD) encompasses a spectrum of pathologic liver changes that occur secondary to altered physiology including congestion, fibrosis, and the development of liver masses. Assessment of FALD is difficult and relies on using imaging alongside of clinical, laboratory, and pathology information. Ultrasound, computed tomography, and magnetic resonance imaging are capable of demonstrating physiologic and hepatic parenchymal abnormalities commonly seen in FALD...
August 11, 2023: Journal of Computer Assisted Tomography
https://read.qxmd.com/read/37574653/appendiceal-neuroendocrine-neoplasms-a-comprehensive-review
#8
JOURNAL ARTICLE
Renjith Padmanabhan Nair Sobha, Corey T Jensen, Rebecca Waters, Luis Fernando Calimano-Ramirez, Mayur K Virarkar
Appendiceal neuroendocrine neoplasm (NEN) is the most common adult appendiceal malignant tumor, constituting 16% of gastrointestinal NENs. They are versatile tumors with varying morphology, immunohistochemistry, secretory properties, and cancer genomics. They are slow growing and clinically silent, to begin with, or present with features of nonspecific vague abdominal pain. Most acute presentations are attributed clinically to appendicitis, with most cases detected incidentally on pathology after an appendectomy...
August 11, 2023: Journal of Computer Assisted Tomography
https://read.qxmd.com/read/37566794/technical-note-assessment-of-pulse-pileup-on-single-energy-and-multienergy-images-from-a-clinical-photon-counting-detector-computed-tomography
#9
JOURNAL ARTICLE
Joshua Ray Chen, Timothy N Winfree, Michael R Bruesewitz, Joseph R Swicklik, Jamison E Thorne, Shuai Leng, Cynthia H McCollough
OBJECTIVE: Pulse pileup effects occur when pulses occur so close together that they fall on top of one another, resulting in count loss and errors in energy thresholding. To date, there has been little work systematically detailing the quantitative effects of pulse pileup on material decomposition accuracy for photon-counting detector (PCD) computed tomography (CT). Our aim in this work was to quantify the effects of pulse pileup on single-energy and multienergy CT images, including low-energy bin (BL), high-energy bin (BH), iodine map, and virtual noncontrast images from a commercial PCD-CT...
August 11, 2023: Journal of Computer Assisted Tomography
https://read.qxmd.com/read/37558649/hemodynamic-characteristics-of-intracranial-atherosclerotic-stenosis-a-pilot-study-of-contrast-enhancement-time-density-curves-based-on-regions-of-interest
#10
JOURNAL ARTICLE
Xiang Yu, Aijing Dong, Weiguo Zhang, Ping Chen
OBJECTIVE: The present study aimed to analyze the hemodynamic characteristics of occluded vessels responsible for acute ischemic stroke and to diagnose the occlusion types. METHODS: Multimodal computed tomography (CT) was used to accurately identify the range of occlusion of large intracranial vessels. Regions of interest (ROI1-3) were manually delineated at sites 2 mm away from the proximal, middle, and distal portions of each occlusion, generating 3 contrast enhancement time-density curves...
August 9, 2023: Journal of Computer Assisted Tomography
https://read.qxmd.com/read/37558648/quantification-of-hepatic-steatosis-on-dual-energy-ct-in-comparison-with-mri-mdixon-quant-sequence-in-breast-cancer
#11
JOURNAL ARTICLE
Xiaoxia Wang, Xianjun Pan, Wenqi Zhou, Zhouhong Jing, Feng Yu, Yali Wang, Junjie Zeng, Jiaxing Wu, Xiaohua Zeng, Jiuquan Zhang
OBJECTIVE: The study aimed to evaluate the correlation and diagnostic value of liver fat quantification in unenhanced dual-energy CT (DECT) using quantitative magnetic resonance imaging (MRI) mDIXON-Quant sequence as reference standard in patients with breast cancer. METHODS: Patients with breast cancer were prospectively recruited between June 2018 and April 2020. Each patient underwent liver DECT and MRI mDIXON-Quant examination. The DECT-fat volume fraction (FVF) and liver-spleen attenuation differences were compared with the MRI-proton density fat fraction using scatterplots, Bland-Altman plots, and concordance correlation coefficient...
August 9, 2023: Journal of Computer Assisted Tomography
https://read.qxmd.com/read/37558647/comparison-of-diatrizoate-and-iohexol-for-patient-acceptance-and-fecal-tagging-performance-in-noncathartic-ct-colonography
#12
JOURNAL ARTICLE
Yanshan Chen, Lijuan Feng, Zixuan Huang, Wenbin Zou, Guibo Luo, Guochao Dai, Weidong Zhao, Wenli Cai, Mingyue Luo
OBJECTIVE: The aim of this study was to compare diatrizoate and iohexol regarding patient acceptance and fecal-tagging performance in noncathartic computed tomography colonography. METHODS: This study enrolled 284 volunteers with fecal tagging by either diatrizoate or iohexol at an iodine concentration of 13.33 mg/mL and an iodine load of 24 g. Patient acceptance was rated on a 4-point scale of gastrointestinal discomfort. Two gastrointestinal radiologists jointly analyzed image quality, fecal-tagging density and homogeneity, and residual contrast agent in the small intestine...
August 9, 2023: Journal of Computer Assisted Tomography
https://read.qxmd.com/read/37558645/patient-positioning-assistive-technology-applicable-to-the-existing-computed-tomography-system-estimation-by-pixel-value-of-scout-image
#13
JOURNAL ARTICLE
Atsushi Urikura, Yosuke Miyauchi, Tsukasa Yoshida, Yuya Ishita, Keisuke Takiguchi, Takeshi Aramaki
This study aimed to propose a patient positioning assistive technique using computed tomography (CT) scout images. A total of 210 patients who underwent CT scans in a single center, including on the upper abdomen, were divided into a study set of 127 patients for regression and 83 patients for verification. Linear regression analysis was performed to determine the R2 coefficient and the linear equation related to the mean pixel value of the scout image and ideal table height (THideal). The average pixel values of the scout image were substituted into the regression equation to estimate the THideal...
August 9, 2023: Journal of Computer Assisted Tomography
https://read.qxmd.com/read/37558644/intravoxel-incoherent-motion-and-dynamic-contrast-enhanced-magnetic-resonance-imaging-can-differentiate-between-atypical-cartilaginous-tumors-and-high-grade-chondrosarcoma-correlation-with-histological-vessel-characteristics
#14
JOURNAL ARTICLE
Bo Jin, Jie Yang, Junping Zhen, Yang Xu, Chen Wang, Qing Jing, Yangwei Shang
OBJECTIVE: To differentiate between atypical cartilaginous tumors and high-grade chondrosarcoma of the major long bones using intravoxel incoherent motion (IVIM) and Dynamic Contrast-Enhanced magnetic resonance imaging (DCE-MRI), and explore the correlation of quantitative parameters with hypoxia inducible factor-1α (HIF-1α), vascular endothelial growth factor (VEGF) and microvessel density (MVD). METHOD: Between September 2016 and March 2022, 35 patients (17 atypical cartilaginous tumors, 18 high-grade chondrosarcoma) underwent MRI examination and pathological confirmation at our hospital...
August 9, 2023: Journal of Computer Assisted Tomography
https://read.qxmd.com/read/37551163/apparent-variation-in-measurement-size-of-colorectal-cancer-metastases-to-the-liver-on-dual-contrast-mri
#15
JOURNAL ARTICLE
Ruben Ngnitewe Massa'a, Peter Wawrzyn, Lu Mao, Scott B Reeder, Frederick Kelcz, Andrew L Wentland
PURPOSE: The aim of this study was to formally investigate the apparent variation in lesion size of hepatic metastatic lesions from colorectal cancer on hepatobiliary phase (HBP) and dual contrast images of magnetic resonance imaging performed with both hepatobiliary and extracellular contrast agents. METHODS: Patients with known colorectal carcinoma who had undergone dual contrast liver magnetic resonance imaging were identified in our institutional database. Metastatic lesions were measured semiautomatically on both HBP and dual contrast images with a custom software tool that automatically identifies the lesion edge and thereby the lesion diameter...
August 7, 2023: Journal of Computer Assisted Tomography
https://read.qxmd.com/read/37551157/diagnostic-utility-of-restriction-spectrum-imaging-in-head-and-neck-tumors-a-pilot-study
#16
JOURNAL ARTICLE
Mustafa Mahmut Baris, Patrick Quarterman, Jaemin Shin, Maggie M Fung, Sachin R Jambawalikar, Gul Moonis
OBJECTIVE: Imaging is crucial in the assessment of head and neck cancers for site, extension, and enlarged lymph nodes. Restriction spectrum imaging (RSI) is a new diffusion-weighted magnetic resonance imaging (MRI) technique that enhances the ability to differentiate aggressive cancer from low-grade or benign tumors and helps guide treatment and biopsy. Its contribution to imaging of brain and prostate tumors has been previously published. However, there are no prior studies using RSI sequence in head and neck tumors...
August 7, 2023: Journal of Computer Assisted Tomography
https://read.qxmd.com/read/37551150/segmentation-based-analysis-of-t2-and-t1-weighted-dynamic-magnetic-resonance-images-provides-adequate-observer-agreement-in-the-evaluation-of-interstitial-lung-disease
#17
JOURNAL ARTICLE
Carina A Ruano, José Veiga, Natalie Antunes, Vera B Carvalho, Otília Fernandes, Alexandra Borba, Francisco P M Oliveira, Maria Francisca Moraes-Fontes, Tiago Bilhim, Klaus L Irion
OBJECTIVE: The aim of the study is to quantify observer agreement in the magnetic resonance imaging (MRI) classification of inflammatory or fibrotic interstitial lung disease (ILD). METHODS: Our study is a preliminary analysis of a larger prospective cohort. The MRI images of 18 patients with ILD (13 females; mean age, 65 years) were acquired in a 1.5 T scanner and included axial fat-saturated T2-weighted (T2-WI, n = 18) and coronal fat-saturated T1-weighted images before and 1, 3, 5, and 10 minutes after gadolinium administration (n = 16)...
August 7, 2023: Journal of Computer Assisted Tomography
https://read.qxmd.com/read/37551148/metastatic-pulmonary-calcification-single-center-review-of-typical-and-atypical-imaging-features
#18
JOURNAL ARTICLE
Tina Chen, Rydhwana Hossain, Jean Jeudy, Lydia Chelala, Charles White
PURPOSE: The purpose of this study is to bring attention to an atypical form of metastatic pulmonary calcification, which is conventionally described as a metabolic process with upper lobe predominance in patients with a specific clinical history, which has not been reported as a distinct entity. METHODS: Patients with metastatic pulmonary calcification (MPC) were first identified with mPower keyword search, including MPC or metastatic calcifications on computed tomography chest radiological reports...
August 7, 2023: Journal of Computer Assisted Tomography
https://read.qxmd.com/read/37551145/computed-tomography-based-predictive-model-for-the-probability-of-lymph-node-metastasis-in-gastric-cancer-a-meta-analysis
#19
JOURNAL ARTICLE
Fei Teng, Yu-Fei Fu, An-Le Wu, Yu-Tao Xian, Jia Lin, Rui Han, Yong-Fang Yin
OBJECTIVES: Whether or not a gastric cancer (GC) patient exhibits lymph node metastasis (LNM) is critical to accurately guiding their treatment and prognostic evaluation, necessitating the ability to reliably predict preoperative LNM status. The present meta-analysis sought to examine the diagnostic value of computed tomography (CT)-based predictive models as a tool to gauge the preoperative LNM status of patients with GC. METHODS: Relevant articles were identified in the PubMed, Web of Science, and Wanfang databases...
August 7, 2023: Journal of Computer Assisted Tomography
https://read.qxmd.com/read/37551143/usefulness-of-ag-additional-filter-on-image-quality-and-radiation-dose-for-low-dose-chest-computed-tomography
#20
JOURNAL ARTICLE
Keishin Kawamoto, Hideyuki Sato, Yosuke Kogure
OBJECTIVE: This study aimed to evaluate the effect of a silver (Ag) additional filter on dose characteristics and image quality in low-dose chest computed tomography (CT). METHODS: A dose evaluation phantom, physical evaluation phantom, and chest phantom were scanned with and without an Ag additional filter. The doses were adjusted so that the displayed the volume CT dose indexes (CTDIvol) were from 0.3 to 1.6 mGy. For dose characteristics, the spectrum of photon energies and the measured CTDIvol were calculated for each scanning condition...
August 7, 2023: Journal of Computer Assisted Tomography
journal
journal
27034
1
2
Fetch more papers »
Fetching more papers... Fetching...
Remove bar
Read by QxMD icon Read
×

Save your favorite articles in one place with a free QxMD account.

×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"

We want to hear from doctors like you!

Take a second to answer a survey question.