Deep learning-based and hybrid-type iterative reconstructions for CT: comparison of capability for quantitative and qualitative image quality improvements and small vessel evaluation at dynamic CE-abdominal CT with ultra-high and standard resolutions

AbstractPurposeTo determine the image quality improvement including vascular structures using deep learning reconstruction (DLR) for ultra-high-resolution CT (UHR-CT) and area-detector CT (ADCT) compared to a commercially available hybrid-iterative reconstruction (IR) method.Materials and methodThirty-two patients suspected of renal cell carcinoma underwent dynamic contrast-enhanced (CE) CT using UHR-CT or ADCT systems. CT value and contrast-to-noise ratio (CNR) on each CT dataset were assessed with region of interest (ROI) measurements. For qualitative assessment of improvement for vascular structure visualization, each artery was assessed using a 5-point scale. To determine the utility of DLR, CT values and CNRs were compared among all UHR-CT data by means of ANOVA followed by Bonferroni post hoc test, and same values on ADCT data were also compared between hybrid IR and DLR methods by pairedt test.ResultsFor all arteries except the aorta, the CT value and CNR of the DLR method were significantly higher compared to those of the hybrid-type IR method in both CT systems reconstructed as 512 or 1024 matrixes (p 
Source: Japanese Journal of Radiology - Category: Radiology Source Type: research

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Publication date: Available online 10 October 2020Source: European UrologyAuthor(s): Stanley Weng, Renzo G. DiNatale, Andrew Silagy, Roy Mano, Kyrollis Attalla, Mahyar Kashani, Kate Weiss, Nicole E. Benfante, Andrew G. Winer, Jonathan A. Coleman, Victor E. Reuter, Paul Russo, Ed Reznik, Satish K. Tickoo, A. Ari Hakimi
Source: European Urology - Category: Urology & Nephrology Source Type: research
AbstractThis systematic review analysed evidence relating to medication-related osteonecrosis of the jaws (MRONJ) associated with protein kinase inhibitors in antiresorptive na ïve patients. A literature search of major biomedical databases was conducted in March 2020. Information extracted from relevant articles included bibliographic information, patient characteristics, MRONJ characteristics at diagnosis, management strategies and outcomes. Sixteen studies, representin g data from 17 patients, were included for final analysis. Descriptive statistics were used to synthesis available data. Eleven protein kinase inhib...
Source: Oral and Maxillofacial Surgery - Category: ENT & OMF Source Type: research
Authors: Chen P, Zhang Z, Chen X Abstract BACKGROUND Protein kinase membrane-associated tyrosine/threonine (PKMYT1) has been found in many tumors, but its association with clear cell renal cell carcinoma (ccRCC) remains unclear. MATERIAL AND METHODS PKMYT1 expression in ccRCC was examined in the Cancer Genome Atlas (TCGA), Gene Expression Omnibus (GEO), and Tumor Immune Estimation Resource databases. The correlation between PKMYT1 expression and clinicopathological parameters was explored via the chi-square test. Receiver operating characteristic curves were used to estimate the diagnostic performance of PKMYT1. Ka...
Source: Medical Science Monitor - Category: Research Tags: Med Sci Monit Source Type: research
Dr Robert Motzer reviews key studies on renal cell carcinoma presented at the 2020 ESMO Virtual Congress, including phase 3 trial results showing benefit from combination therapies in advanced RCC.Medscape
Source: Medscape Today Headlines - Category: Consumer Health News Tags: None ReCAP Source Type: news
CONCLUSIONS: Most T1a 0- to 2-cm renal cell carcinoma represents the low-grade clear-cell or low-grade papillary histologic subtype, with an FG3-4 minority. Even in patients with the FG3-4 histologic subtype, rates of synchronous metastases are virtually zero. PMID: 33022641 [PubMed - in process]
Source: Journal of the National Comprehensive Cancer Network : JNCCN - Category: Cancer & Oncology Tags: J Natl Compr Canc Netw Source Type: research
Abstract As one of the 10 most common cancers in men, the incidence of renal cell carcinoma (RCC) has been increasing in recent years. Clear cell renal cell carcinoma (ccRCC) is the most common pathological type of RCC, counting for 80%-90% of cases. Immunotherapy is becoming increasingly important in the treatment of advanced RCC. Tumor mutation burden (TMB) is a potent marker for predicting the response to immune checkpoint blockade (ICB) treatment. Here, we analyzed somatic mutation data for ccRCC from The Cancer Genome Atlas datasets. We found that the frequently mutated gene SYNE1 is associated with higher TM...
Source: Aging - Category: Biomedical Science Authors: Tags: Aging (Albany NY) Source Type: research
Molecular characterization has led to advances in the understanding of pediatric renal tumors, including the association of pediatric cystic nephromas with DICER1 tumor syndrome, the metanephric family of tumors with somatic BRAF mutations, the characterization of ETV6-NTRK3 –negative congenital mesoblastic nephromas, the expanded spectrum of gene fusions in translocation renal cell carcinoma, the relationship of clear cell sarcoma of the kidney with other BCOR-altered tumors, and the pathways affected by SMARCB1 alterations in rhabdoid tumors of the kidney. These adv ances have implications for diagnosis, classifica...
Source: Surgical Pathology Clinics - Category: Pathology Authors: Source Type: research
Expression of carbonic-anhydrase IX (CAIX) in clear cell renal cell carcinoma (RCC) makes it an attractive vaccine target. We developed a fusion-gene construct, granulocyte-macrophage (GM) colony-stimulating factor+CAIX, delivered by an adenoviral vector (Ad) into autologous dendritic cells (DCs) in this phase 1 study. The injected immature DCs were expected to stimulate an antigen-specific immune response against CAIX expressing RCC. Three dose-escalation cohorts (5, 15, and 50×106 cells/administration) were injected intradermally q2wk×3 doses based on a 3+3 design. The primary objective was the safety ...
Source: Journal of Immunotherapy - Category: Allergy & Immunology Tags: Clinical Studies Source Type: research
n C Abstract Immunotherapies with checkpoint inhibitors have led to a paradigm shift in metastatic renal cell carcinoma (mRCC) as they established a new standard in first-line treatment. In addition to the established monotherapy with tyrosine kinase inhibitors, the spectrum of first-line options has now become wider. Based on data from studies and current guideline recommendations, this article discusses possible factors for individual strategies in first-line treatment of mRCC. For this decision, the leading criterion is the patient's risk score. In addition, the efficacy and tolerability of the substa...
Source: Der Urologe. Ausg. A - Category: Urology & Nephrology Authors: Tags: Urologe A Source Type: research
MA Abstract Due to novel therapies, the prognosis of patients with metastatic renal cell carcinoma (mRCC) has improved. A median overall survival of more than two years is a realistic goal. Immunotherapy combinations with checkpoint inhibitors or checkpoint inhibitors and the tyrosine kinase inhibitor axitinib are new first-line options.Sunitinib, pazopanib, tivozanib and the combination of bevacizumab + interferon alpha are approved for first-line therapy regardless of the progression risk score. The use of both the combination of nivolumab + ipilimumab and cabozantinib is restricted to intermediate and ...
Source: Aktuelle Urologie - Category: Urology & Nephrology Authors: Tags: Aktuelle Urol Source Type: research
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