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Gross N, Miller D, Khushanlani N, Divi V, Ruiz E, Lipson E, Meier F, Su Y, Swiecicki P, Atlas J, Geiger J, Hauschild A, Choe J, Hughes B, Yoo SY, Fenech K, Mathias M, Han H, Fury M, Rischin D. 789O Neoadjuvant cemiplimab in patients (pts) with stage II–IV (M0) cutaneous squamous cell carcinoma (CSCC): Primary analysis of a phase II study. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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Jindal T, Han H, Deshmukh P, De Kouchkovsky I, Kwon D, Borno H, Koshkin V, Desai A, Bose R, Chou J, Friedlander T, Small E, Angelidakis A, Johnson M, Feng S, Patnaik A, Fong L, Alumkal J, Aggarwal R. 1404P A phase II study of ZEN-3694 (ZEN), enzalutamide (ENZ), and pembrolizumab (P) in metastatic castration resistant prostate cancer (mCRPC): Interim safety results. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.1890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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Han H, Brings L, Chretien A, De Diego I, Round E, Schmidt C, Schubert R, Schulz J, Lorenzen K. Protein crystallization and characterization for serial femtosecond crystallography at the European XFEL. ACTA CRYSTALLOGRAPHICA SECTION A FOUNDATIONS AND ADVANCES 2022. [DOI: 10.1107/s2053273322089926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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De Wijn R, Mills G, Bean R, Bielecki J, Han H, Koua F, Kantamneni S, Kim C, Koliyadu J, Letrun R, Melo D, Round A, Sato T, Schubert R, Vakili M, Wrona A, Mancuso A, Mancuso A. On-the-fly crystallization for nucleation studies by serial femtosecond crystallography at the European X-ray Free-Electron Laser. ACTA CRYSTALLOGRAPHICA SECTION A FOUNDATIONS AND ADVANCES 2022. [DOI: 10.1107/s2053273322093299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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Han H, Ning Z, Yang D, Yu M, Qiao H, Chen S, Chen Z, Li D, Zhang R, Liu G, Zhao X. Associations between cerebral blood flow and progression of white matter hyperintensity in community-dwelling adults: a longitudinal cohort study. Quant Imaging Med Surg 2022; 12:4151-4165. [PMID: 35919044 PMCID: PMC9338364 DOI: 10.21037/qims-22-141] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Accepted: 05/27/2022] [Indexed: 12/05/2022]
Abstract
Background White matter hyperintensity (WMH) is prevalent in elderly populations. Ischemia is characterized by a decline in cerebral blood flow (CBF) and may play a key role in the pathogenesis of WMH. However, the association between CBF reduction and WMH progression remains controversial. This study aimed to investigate the association between CBF and the progression of WMH at a 2-year follow-up of community-based, asymptomatic adults in a longitudinal cohort study across the lifespan. Methods Asymptomatic adults who participated in a community-based study were recruited and underwent brain structural and perfusion magnetic resonance imaging (MRI) at baseline and at a 2-year follow-up visit. The CBF was measured on pseudo-continuous arterial spin-labeling (pCASL) MRI. The WMH was evaluated on T2-weighted fluid-attenuated inversion recovery (T2-FLAIR) images. Tissue segmentation was conducted on T1-weighted (T1W) images to derive binary masks of gray matter and normal-appearing white matter. Linear mixed effect models were conducted to analyze the cross-sectional and longitudinal associations between CBF and WMH. Results A total of 229 adults (mean age 57.3±12.6 years; 94 males) were enrolled at baseline, among whom 84 participants (mean age 54.1±11.9 years; 41 males) completed a follow-up visit with a mean time interval of 2.77±0.44 years. At baseline, there was a decreasing trend in gray matter (GM) CBF with an increase of WMH burden (P=0.063), but this association was attenuated after adjusting for age (P=0.362). In the longitudinal analysis, baseline WMH volume was significantly associated with the reduction of perfusion in GM [coefficient =−1.96, 95% confidence interval (CI): −3.25 to −0.67; P=0.004] and normal appearing white matter (coefficient =−0.99, 95% CI: −1.66 to −0.31; P=0.005) during follow-up. On the contrary, neither baseline CBF in GM (P=0.888) nor normal appearing white matter (P=0.850) was associated with WMH progression. In addition, CBF changes within WMH were significantly associated with both baseline (coefficient =−0.014, 95% CI: −0.025 to −0.003; P=0.017) and progression (coefficient =−1.01, 95% CI: −1.81 to −0.20; P=0.015) of WMH volume. Conclusions A WMH burden was not found to be directly associated with cortex perfusion at baseline due to the effects of age on both CBF and WMH. However, baseline WMH volume could predict the reduction of perfusion.
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Bi XJ, Lv YQ, Yang XH, Ge Y, Han H, Feng JS, Zhang M, Chen L, Xu MZ, Guan FY. A New Berberine Preparation Protects Pancreatic Islet Cells from Apoptosis Mediated by Inhibition of Phospholipase A2/p38 MAPK Pathway. Bull Exp Biol Med 2022; 173:346-353. [DOI: 10.1007/s10517-022-05547-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Indexed: 11/30/2022]
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Han H, Swaisgood RR, Qiu L, Chen Y, Zhang Z. Down‐listing pandas and upgrading conservation: China setting an example to preserve wildlife worldwide. Anim Conserv 2022. [DOI: 10.1111/acv.12803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Ning Z, Chen S, Chen Z, Han H, Qiao H, Zhang N, Wang R, Shen R, Zhao X. Saturated multi-delay renal arterial spin labeling technique for simultaneous perfusion and T 1 quantification in kidneys. Magn Reson Med 2022; 88:1055-1067. [PMID: 35506512 DOI: 10.1002/mrm.29268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 03/22/2022] [Accepted: 03/24/2022] [Indexed: 11/06/2022]
Abstract
PURPOSE To propose a free-breathing simultaneous multi-delay arterial spin labeling (ASL) and T1 mapping technique with a stepwise kinetic model for renal assessment in a single 4-min scan at 3 T. METHODS The proposed saturated multi-delay renal arterial spin labeling (SAMURAI) sequence used flow-sensitive alternating inversion recovery (FAIR) preparation, followed by acquisition of 9 images with Look-Locker spoiled gradient recalled echo (SPGR). Pre-saturation at the imaging slice was used to achieve saturation-based T1 mapping. A 4-step 2-compartment kinetic model was proposed to characterize water transition through artery- and tissue-compartment. The impact of the Look-Locker sampling scheme on the ASL signal was corrected in this model. T1 estimation with dictionary searching method and perfusion quantification based on the proposed kinetic model fitting were conducted after groupwise registration of the acquired images. The feasibility and repeatability of SAMURAI were validated in healthy subjects (n = 11) and patients with different renal diseases (n = 4). RESULTS The proposed SAMURAI technique can provide accurate T1 map with strong correlation (R2 = 0.98) with inversion recovery spin echo (IR-SE) on phantom. SAMURAI provided equally reliable whole kidney and cortical ASL and T1 quantification results compared with multi-TI FAIR (intraclass correlation coefficient [ICC], 0.880-0.958) and IR-SPGR (ICC, 0.875-0.912), respectively. Low renal blood flow and increased T1 were detected by SAMURAI in the affected kidneys of the patients. SAMURAI had excellent scan-rescan repeatability (ICC, 0.905-0.992) and significantly reduced scan time (4 min 6 s vs. 45 min for 9 TIs) compared to multi-TI FAIR. CONCLUSION The proposed SAMURAI technique is feasible and repeatable for simultaneously quantifying T1 and perfusion of kidneys with high time-efficiency.
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Park Y, Jung K, Sohn J, Lee K, Kim J, Yang Y, Baek E, Han H, Im SA. 176P Poziotinib for HER2-positive metastatic breast cancer (MBC): Final clinical efficacy and safety results for long-term follow-up of the phase II NOV120101-203 trial. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.03.195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Yang K, Han H, Li Y, Ye J, Xu F. Significance of miRNA in enhancement of flavonoid biosynthesis. PLANT BIOLOGY (STUTTGART, GERMANY) 2022; 24:217-226. [PMID: 34806280 DOI: 10.1111/plb.13361] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 10/15/2021] [Indexed: 05/20/2023]
Abstract
Flavonoid metabolism shows very strong plasticity in plant development and coping with the changing environment. Flavonoid biosynthesis is regulated by many metabolic pathways, including transcriptional regulation, post-transcriptional control, post-translational regulationand epigenetic regulation. miRNA is a form of endogenous noncoding single-strand small molecule RNA that primarily regulates the expression of target genes horizontally after transcription through splicing and translational suppression. It also plays an important role in regulating plant growth and development, secondary metabolism and biotic and abiotic stress. miRNA can regulate the formation of flavonoids by acting on structural genes or indirectly by using an MBW transcription complex comprising MYB-bHLH-WD40. This study summarizes the biosynthesis and mechanisms of miRNA, and provides a summary of the mechanisms of miRNAs involved in production of flavonoids, in order to elucidate the biosynthesis pathway and complex regulatory network of plant flavonoids. We aim to provide new insights into improving the content of flavonoid active ingredients in plants.
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Han H, Park C, Cho N, Lee J, Han W, Ham W, Choi Y. BRCA1/2 and ATM mutated metastatic prostate cancers may present with low serum PSA. Eur Urol 2022. [DOI: 10.1016/s0302-2838(22)00596-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Li Z, Wu C, Han H, Li X, Zhou F. Glasgow prognostic score is a pre-surgical prognostic marker of inguinal lymph node metastasis extranodal extension in penile cancer. Eur Urol 2022. [DOI: 10.1016/s0302-2838(22)00770-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Liu W, Liu J, Zhou Y, Cao D, Lei Q, Han H, Wang J, Li D, Gao J, Li H, Li F. Genome-Wide Association Study of Abdominal Fat in Wenshang Barred Chicken Based on the Slaf-Seq Technology. BRAZILIAN JOURNAL OF POULTRY SCIENCE 2022. [DOI: 10.1590/1806-9061-2021-1612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Han Y, Zhang R, Yang D, Li D, Han H, Qiao H, Chen S, Wang Y, Yu M, Hong Y, Wang Z, Zhao X, Liu G. Risk Factors for Asymptomatic and Symptomatic Intracranial Atherosclerosis Determined by Magnetic Resonance Vessel Wall Imaging in Chinese Population: A Case–Control Study. Ther Clin Risk Manag 2022; 18:61-70. [PMID: 35058694 PMCID: PMC8764293 DOI: 10.2147/tcrm.s335401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Accepted: 11/16/2021] [Indexed: 11/23/2022] Open
Abstract
Background and Purpose The association between risk factors and intracranial atherosclerosis disease (ICAD) determined by magnetic resonance (MR) vessel wall imaging in Chinese population has not been investigated. The aim of this study was to investigate the associations of conventional vascular risk factors with asymptomatic and symptomatic ICAD using MR vessel wall imaging in Chinese population. Methods The study population was recruited from two cohort studies of ICASMAP and CAMERA comprised 104 symptomatic ICAD subjects (57.1 ± 11.1 years; 35.6% females), 51 asymptomatic ICAD subjects (70.1 ± 8.4 years; 50.0% females) and 418 controls (58.0 ± 13.3 years; 61.0% females) defined as asymptomatic subjects without ICAD on MR vessel wall imaging. We compared the vascular risk factors between the three groups using a multivariate logistic regression analysis. Results Compared with controls, there was a significant positive association between age (OR: 1.07, 95% CI: 1.03–1.10, p < 0.001) and hypertension (OR: 3.03, 95% CI: 1.45–6.36, p = 0.003) and asymptomatic ICAD. There was a positive association of smoking (OR: 3.41, 95% CI: 1.57–7.42, p = 0.001), hypertension (OR: 7.43, 95% CI: 3.81–14.49, p < 0.001) and diabetes (OR: 3.54, 95% CI: 1.93–6.49, p < 0.001) and an inverse association of high-density lipoprotein (HDL) (p < 0.017) with symptomatic ICAD. Compared to asymptomatic ICAD, there was a significant inverse association of age (OR: 0.86, 95% CI: 0.81–0.92, p < 0.001) and HDL (p < 0.001) with symptomatic ICAD. Conclusion Old age and hypertension are associated with asymptomatic ICAD and smoking, hypertension, diabetes and lower HDL are associated with an increased risk of symptomatic ICAD in Chinese population. Clinical Trial Registration URL: http://www.clinicaltrials.gov. Unique identifier: NCT03417063.
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Ning Z, Zhang N, Qiao H, Han H, Shen R, Yang D, Chen S, Zhao X. Free-Breathing Three-Dimensional Isotropic-Resolution MR sequence for simultaneous vessel wall imaging of bilateral renal arteries and abdominal aorta: Feasibility and reproducibility. Med Phys 2021; 49:854-864. [PMID: 34967464 DOI: 10.1002/mp.15436] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 11/03/2021] [Accepted: 12/28/2021] [Indexed: 11/08/2022] Open
Abstract
PURPOSE Many diseases can simultaneously involve renal arteries and the adjacent abdominal aorta. The study proposed a free-breathing three-dimensional (3D) isotropic-resolution MR sequence for simultaneous vessel wall imaging of bilateral renal arteries and adjacent abdominal aorta. METHODS A respiratory triggered isotropic-resolution sequence which combined the improved motion-sensitized driven-equilibrium (iMSDE) preparation with the spoiled gradient recalled (SPGR) readout (iMSDE-SPGR) was proposed for simultaneous vessel wall imaging of renal arteries and abdominal aorta. The proposed iMSDE-SPGR sequence was optimized by positioning spatial saturation pulses (i.e. REST slabs) elaborately to further alleviate respiratory and gastrointestinal motion artifacts and selecting appropriate first-order gradient moment (m1 ) of the iMSDE preparation. Thirteen healthy subjects and thirteen patients with renal artery stenosis (RAS) underwent simultaneous vessel wall imaging with the optimized iMSDE-SPGR sequence at 3.0T. Signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR) and morphology of renal arterial wall and aortic wall were measured. Reproducibility of intra-observer, inter-observer and scan-rescan (n = 13 healthy subjects) in measuring SNR, CNR and morphology was evaluated. For the reproducibility test, the agreement was determined using intraclass correlation coefficients (ICC) and the differences were compared using paired-t test or non-parametric Wilcoxon test when appropriate. Bland-Altman plots were used to calculate the bias between observers and between scans. RESULTS The proposed iMSDE-SPGR sequence was feasible for simultaneous vessel wall imaging both in the healthy subjects and the patients. The sequence showed good to excellent inter-observer (ICC:0.615-0.999), excellent intra-observer (ICC:0.801-0.998) and scan-rescan (ICC:0.768-0.998) reproducibility in measuring morphology, SNR and CNR. There were no significant differences in SNR, CNR and morphology measurements between observers and between scans (all P>0.05). Bland-Altman plots showed small bias in assessing SNR, CNR and morphology. DATA CONCLUSION The proposed free-breathing 3D isotropic-resolution iMSDE-SPGR technique is feasible and reproducible for simultaneous vessel wall imaging of bilateral renal arteries and adjacent abdominal aorta. This article is protected by copyright. All rights reserved.
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Li S, Tang K, Khodadadi-Jamayran A, Jen J, Han H, Guidry K, Chen T, Hao Y, Fedele C, Zebala J, Maeda D, Christensen J, Olson P, Athanas A, Wong K, Neel B. OA12.03 Combined Inhibition of SHP2 and CXCR1/2 Promotes Anti-Tumor T Cell Response in NSCLC. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Fu Z, Yang H, Han H, Jia D, Xu L, Su G, Wang Z. Effect of whole-grain rice on pellet quality, geese performance, and economic benefits. J APPL POULTRY RES 2021. [DOI: 10.1016/j.japr.2021.100176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Kim B, Bae H, Kwon J, Han H, Kim H. PO-1911 Low-dose irradiation could mitigate osteoarthritis progression by modulating mitochondrial function. Radiother Oncol 2021. [DOI: 10.1016/s0167-8140(21)08362-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Shi Y, An X, Yan R, Yao K, Xue C, Guo S, Liu T, Li J, Ma H, Tian L, Zhou F, Shi Y, Han H. A phase II study to evaluate safety and efficacy of PD-1 blockade plus anti-EGFR target therapy plus chemotherapy in patients with advanced penile squamous cell carcinoma. Eur Urol 2021. [DOI: 10.1016/s0302-2838(21)01057-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Wu C, Han H, Wang Y, Zhuo S, Guo S. Better specificity and less ischemia: High-precision three-dimensional Reconstruction is superior to routine CT angiography in navigation of Robot assisted partial nephrectomy with selective clamping. Eur Urol 2021. [DOI: 10.1016/s0302-2838(21)00966-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Xin R, Yang D, Xu H, Han H, Li J, Miao Y, Du Z, Ding Q, Deng S, Ning Z, Shen R, Li R, Li C, Yuan C, Zhao X. Comparing Symptomatic and Asymptomatic Carotid Artery Atherosclerosis in Patients With Bilateral Carotid Vulnerable Plaques Using Magnetic Resonance Imaging. Angiology 2021; 73:104-111. [PMID: 34018407 DOI: 10.1177/00033197211012531] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
We compared plaque characteristics between symptomatic and asymptomatic sides in patients with bilateral carotid vulnerable plaques using magnetic resonance imaging (MRI). Participants (n = 67; mean age: 65.8 ± 7.7 years, 61 males) with bilateral carotid vulnerable plaques were included. Vulnerable plaques were characterized by intraplaque hemorrhage (IPH), large lipid-rich necrotic core (LRNC), or fibrous cap rupture (FCR) on MRI. Symptomatic vulnerable plaques showed greater plaque burden, LRNC volume (median: 221.4 vs 134.8 mm3, P = .003), IPH volume (median: 32.2 vs 22.5 mm3, P = .030), maximum percentage (Max%) LRNC (median: 51.3% vs 41.8%, P = .002), Max%IPH (median: 13.4% vs 9.5%, P = .022), cumulative slices of LRNC (median: 10 vs 8, P = .005), and more juxtaluminal IPH and/or thrombus (29.9% vs 6.0%, P = .001) and FCR (37.3% vs 16.4%, P = .007) than asymptomatic ones. After adjusting for plaque burden, differences in juxtaluminal IPH and/or thrombus (odds ratio [OR]: 5.49, 95% CI: 1.61-18.75, P = .007) and FCR (OR: 2.90, 95% CI: 1.16-7.24, P = .022) between bilateral sides remained statistically significant. For patients with bilateral carotid vulnerable plaques, symptomatic plaques had greater burden, more juxtaluminal IPH and/or thrombus, and FCR compared with asymptomatic ones. The differences in juxtaluminal IPH and/or thrombus and FCR between bilateral sides were independent of plaque burden.
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Spring L, Han H, Hamilton E, Irie H, Santa-Maria C, Reeves J, Pan P, Shan M, Tang Y, Graham J, Hazard S, Ellisen L, Isakoff S. Neoadjuvant niraparib in patients with HER2-negative, BRCA-mutated resectable breast cancer. Breast 2021. [DOI: 10.1016/s0960-9776(21)00183-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Ning Z, Chen S, Sun H, Shen R, Qiao H, Han H, Yang D, Zhao X. Evaluating renal arterial wall by non-enhanced 2D and 3D free-breathing black-blood techniques: Initial experience. Magn Reson Imaging 2021; 79:5-12. [PMID: 33677024 DOI: 10.1016/j.mri.2021.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 02/28/2021] [Accepted: 03/03/2021] [Indexed: 10/22/2022]
Abstract
OBJECTIVES To evaluate the feasibility and reproducibility of 2D and 3D black-blood sequences in measuring morphology of renal arterial wall. METHODS The 2D and 3D imaging sequences used variable-refocusing-flip-angle and constant-low-refocusing-flip-angle turbo spin echo (TSE) readout respectively, with delicately selected black-blood scheme and respiratory motion trigger for free-breathing imaging. Fourteen healthy subjects and three patients with Takayasu arteritis underwent renal artery wall imaging with 3D double inversion recovery (DIR) TSE and 2D Variable Flip Angle-TSE (VFA-TSE) black-blood sequences at 3.0 T. Four healthy subjects were randomly selected for scan-rescan reproducibility experiments. Signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR) and morphology of arterial wall were measured and compared using paired-t-test or Wilcoxon signed-rank test between 2D and 3D sequences. The inter-observer, intra-observer and scan-rescan agreements of above measurements were determined using intraclass correlation coefficient (ICC). RESULTS The 2D and 3D imaging sequences showed similar morphological measurements (lumen area, wall area, mean wall thickness and maximum wall thickness) of renal arterial wall (all P > 0.05) and excellent agreement (ICC: 0.853-0.954). Compared to 2D imaging, 3D imaging exhibited significantly lower SNRlumen (P < 0.01) and SNRwall (P = 0.037), similar contrast-to-noise ratio (CNR) (P = 0.285), and higher CNR efficiency (CNReff) (P < 0.01). Both 2D and 3D imaging showed good to excellent inter-observer (ICC: 0.723-0.997), intra-observer (ICC: 0.749-0.996) and scan-rescan (ICC: 0.710-0.992) reproducibility in measuring renal arterial wall morphology, SNR and CNR, respectively. CONCLUSIONS Both high-resolution free-breathing 2D VFA-TSE and 3D DIR TSE black-blood sequences are feasible and reproducible in high-resolution renal arterial wall imaging. The 2D imaging has high SNR, whereas 3D imaging has high imaging efficiency.
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Huo R, Xu H, Yang D, Qiao H, Li J, Han H, Liu Y, Wang T, Yuan H, Zhao X. Associations Between Carotid Plaque Characteristics and Improvement of Cerebral Blood Perfusion in Patients With Moderate to Severe Carotid Stenosis Undergoing Carotid Endarterectomy. J Magn Reson Imaging 2020; 53:613-625. [PMID: 33037860 DOI: 10.1002/jmri.27365] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 08/31/2020] [Accepted: 09/01/2020] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND The relationship between plaque characteristics and their predictive value for perioperative cerebral blood flow (CBF) are unknown. PURPOSE To investigate the relationship between carotid plaque characteristics and perioperative CBF utilizing MRI. STUDY TYPE Prospective. POPULATION In all, 131 patients with carotid moderate-to-severe stenosis referred for carotid endarterectomy (CEA). FIELD STRENGTH/SEQUENCE 3T, black-blood T1 - and T2 -weighted, 3D time-of-flight, and simultaneous noncontrast angiography intraplaque hemorrhage. ASSESSMENT The relative CBF (rCBF = CBFindex-hemisphere /CBFcontralateral-hemisphere ) and the CBF difference ratio (DRCBF = [CBFpost-CEA - CBFpre-CEA ]/CBFpre-CEA ) in the middle cerebral artery territory were measured. The pre- and post-CEA CTP data were used as the assessment standard for CBF change. Carotid lipid-rich necrotic core (LRNC), intraplaque hemorrhage, calcification, fibrous cap rupture, maximum wall thickness, normalized wall index (NWI), and stenosis were determined. STATISTICAL TESTS Pearson or Spearman correlation, Mann-Whitney U-test, and linear regression. RESULTS Patients with LRNC had higher rCBFpre-CEA than those without (1.0 ± 0.1 vs. 0.9 ± 0.1, P < 0.05). NWI was weakly correlated with rCBFpre-CEA (r = -0.213, P < 0.05) and DRCBF (r = 0.185, P < 0.05) and marginally correlated with rCBFpost-CEA (r = 0.166, P = 0.057). LRNC was weakly correlated with rCBFpre-CEA (r = 0.179, P < 0.05). NWI was associated with rCBFpre-CEA (β = -0.035; 95% confidence interval [CI] [-0.064, -0.006]; P < 0.05), rCBFpost-CEA (β = 0.042; 95% CI [0.002, 0.081]; P < 0.05) and DRCBF (β = 0.105; 95% CI [0.026, 0.185]; P < 0.05). After adjusting for confounding factors, associations of NWI with rCBFpost-CEA (β = 0.059; 95% CI [0.016, 0.103]; P < 0.05) and DRCBF (β = 0.110; 95% CI [0.021, 0.199]; P < 0.05) remained statistically significant, while the association between NWI and rCBFpre-CEA was no longer significant (β = -0.026; 95% CI [-0.058, 0.006]; P = 0.112).The associations of LRNC with rCBFpre-CEA (β = 0.057; 95% CI [-0.0006, 0.114]; P = 0.052) and DRCBF (β = -0.157; 95% CI [-0.314, 0.001]; P = 0.051) were close to statistical significance. After adjusting for confounding factors, these associations were statistically significant (of LRNC vs. rCBFpre-CEA : β = 0.060; 95% CI [0.003, 0.118]; P < 0.05; LRNC vs. DRCBF : β = -0.205; 95% CI [-0.375, -0.036]; P < 0.05). DATA CONCLUSION Carotid plaque burden and components, particularly LRNC, might be effective indicators for CBF change following CEA. Level of Evidence 1 Technical Efficacy Stage 5.
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Kim CH, Yeom YS, Petoussi-Henss N, Zankl M, Bolch WE, Lee C, Choi C, Nguyen TT, Eckerman K, Kim HS, Han MC, Qiu R, Chung BS, Han H, Shin B. ICRP Publication 145: Adult Mesh-Type Reference Computational Phantoms. Ann ICRP 2020; 49:13-201. [PMID: 33231095 DOI: 10.1177/0146645319893605] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
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