Radiology. Cardiothoracic imaging最新文献

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Innominate Vein Turndown Procedure as Another Option for Lymphatic Abnormalities in Fontan Patients. 作为治疗丰坦患者淋巴异常的另一种选择的腹内静脉翻转术。
IF 3.8
Radiology. Cardiothoracic imaging Pub Date : 2024-08-01 DOI: 10.1148/ryct.240257
Pier Paolo Bassareo
{"title":"Innominate Vein Turndown Procedure as Another Option for Lymphatic Abnormalities in Fontan Patients.","authors":"Pier Paolo Bassareo","doi":"10.1148/ryct.240257","DOIUrl":"10.1148/ryct.240257","url":null,"abstract":"","PeriodicalId":21168,"journal":{"name":"Radiology. Cardiothoracic imaging","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11369645/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141902774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Noncontrast MR Lymphangiography to Identify Progression of Lymphatic Abnormalities over the Course of Fontan Completion. 通过非对比 MR 淋巴管造影确定丰坦手术完成过程中淋巴管异常的进展。
IF 3.8
Radiology. Cardiothoracic imaging Pub Date : 2024-08-01 DOI: 10.1148/ryct.240201
Jeremy D Collins, Scott M Thompson
{"title":"Noncontrast MR Lymphangiography to Identify Progression of Lymphatic Abnormalities over the Course of Fontan Completion.","authors":"Jeremy D Collins, Scott M Thompson","doi":"10.1148/ryct.240201","DOIUrl":"10.1148/ryct.240201","url":null,"abstract":"","PeriodicalId":21168,"journal":{"name":"Radiology. Cardiothoracic imaging","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11369648/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141760693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Association of Cardiac MRI-derived Aortic Stiffness with Early Stages and Progression of Heart Failure with Preserved Ejection Fraction. 心脏磁共振成像得出的主动脉僵硬度与射血分数保留型心力衰竭早期阶段和进展的关系
IF 3.8
Radiology. Cardiothoracic imaging Pub Date : 2024-08-01 DOI: 10.1148/ryct.230344
Alexander Schulz, Isabel N Schellinger, Sören J Backhaus, Ansgar S Adler, Torben Lange, Ruben Evertz, Johannes T Kowallick, Annett Hoffmann, Christian Matek, Philip S Tsao, Gerd Hasenfuß, Uwe Raaz, Andreas Schuster
{"title":"Association of Cardiac MRI-derived Aortic Stiffness with Early Stages and Progression of Heart Failure with Preserved Ejection Fraction.","authors":"Alexander Schulz, Isabel N Schellinger, Sören J Backhaus, Ansgar S Adler, Torben Lange, Ruben Evertz, Johannes T Kowallick, Annett Hoffmann, Christian Matek, Philip S Tsao, Gerd Hasenfuß, Uwe Raaz, Andreas Schuster","doi":"10.1148/ryct.230344","DOIUrl":"10.1148/ryct.230344","url":null,"abstract":"<p><p>Purpose To investigate if aortic stiffening as detected with cardiac MRI is an early phenomenon in the development and progression of heart failure with preserved ejection fraction (HFpEF). Materials and Methods Both clinical and preclinical studies were performed. The clinical study was a secondary analysis of the prospective HFpEF stress trial (August 2017 through September 2019) and included 48 participants (median age, 69 years [range, 65-73 years]; 33 female, 15 male) with noncardiac dyspnea (NCD, <i>n</i> = 21), overt HFpEF at rest (pulmonary capillary wedge pressure [PCWP] ≥ 15 mm Hg, <i>n</i> = 14), and masked HFpEF at rest diagnosed during exercise stress (PCWP ≥ 25 mm Hg, <i>n</i> = 13) according to right heart catheterization. Additionally, all participants underwent echocardiography and cardiac MRI at rest and during exercise stress. Aortic pulse wave velocity (PWV) was calculated. The mechanistic preclinical study characterized cardiac function and structure in transgenic mice with induced arterial stiffness (Runx2-smTg mice). Statistical analyses comprised nonparametric and parametric comparisons, Spearman correlations, and logistic regression models. Results Participants with HFpEF showed increased PWV (NCD vs masked HFpEF: 7.0 m/sec [IQR: 5.0-9.5 m/sec] vs 10.0 m/sec [IQR: 8.0-13.4 m/sec], <i>P</i> = .005; NCD vs overt HFpEF: 7.0 m/sec [IQR: 5.0-9.5 m/sec] vs 11.0 m/sec [IQR: 7.5-12.0 m/sec], <i>P</i> = .01). Increased PWV correlated with higher PCWP (<i>P</i> = .006), left atrial and left ventricular long-axis strain (all <i>P</i> < .02), and N-terminal pro-brain natriuretic peptide levels (<i>P</i> < .001). Participants with overt HFpEF had higher levels of myocardial fibrosis, as demonstrated by increased native T1 times (1199 msec [IQR: 1169-1228 msec] vs 1234 msec [IQR: 1208-1255 msec], <i>P</i> = .009). Aortic stiffness was independently associated with HFpEF on multivariable analyses (odds ratio, 1.31; <i>P</i> = .049). Runx2-smTG mice exhibited an \"HFpEF\" phenotype compared with wild-type controls, with preserved left ventricular fractional shortening but an early and late diastolic mitral annulus velocity less than 1 (mean, 0.67 ± 0.39 [standard error of the mean] vs 1.45 ± 0.47; <i>P</i> = .004), increased myocardial collagen deposition (mean, 11% ± 1 vs 2% ± 1; <i>P</i> < .001), and increased brain natriuretic peptide levels (mean, 171 pg/mL ± 23 vs 101 pg/mL ± 10; <i>P</i> < .001). Conclusion This study provides translational evidence that increased arterial stiffness might be associated with development and progression of HFpEF and may facilitate its early detection. <b>Keywords:</b> MR Functional Imaging, MR Imaging, Animal Studies, Cardiac, Aorta, Heart ClinicalTrials.gov identifier NCT03260621 <i>Supplemental material is available for this article.</i> © RSNA, 2024.</p>","PeriodicalId":21168,"journal":{"name":"Radiology. Cardiothoracic imaging","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11369653/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141983154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Prognostic Value of Preoperative N Subcategories in Patients with Stage IIIA N2 Non-Small Cell Lung Cancer. IIIA N2 期非小细胞肺癌患者术前 N 子类别的预后价值
IF 3.8
Radiology. Cardiothoracic imaging Pub Date : 2024-08-01 DOI: 10.1148/ryct.230347
Na Eun Oh, Jooae Choe, Jae Kwang Yun, Wonjun Ji, Seonok Kim, Eun Jin Chae, Sang Min Lee, Joon Beom Seo
{"title":"Prognostic Value of Preoperative N Subcategories in Patients with Stage IIIA N2 Non-Small Cell Lung Cancer.","authors":"Na Eun Oh, Jooae Choe, Jae Kwang Yun, Wonjun Ji, Seonok Kim, Eun Jin Chae, Sang Min Lee, Joon Beom Seo","doi":"10.1148/ryct.230347","DOIUrl":"10.1148/ryct.230347","url":null,"abstract":"<p><p>Purpose To evaluate the preoperative risk factors in patients with pathologic IIIA N2 non-small cell lung cancer (NSCLC) who underwent upfront surgery and to evaluate the prognostic value of new N subcategories. Materials and Methods Patients with pathologic stage IIIA N2 NSCLC who underwent upfront surgery in a single tertiary center from January 2015 to April 2021 were retrospectively reviewed. Each patient's clinical N (cN) was assigned to one of six subcategories (cN0, cN1a, cN1b, cN2a1, cN2a2, and cN2b) based on recently proposed N descriptors. Cox regression analysis was used to identify the significant prognostic factors for recurrence-free survival (RFS) and overall survival (OS). Results A total of 366 patients (mean age ± SD, 62.0 years ± 10.1; 202 male patients [55%]) were analyzed. The recurrence rate was 55% (203 of 366 patients) over a median follow-up of 37.3 months. Multivariable analysis demonstrated that cN (hazard ratios [HRs] for cN1 and cN2b compared with cN0, 1.66 [95% CI: 1.11, 2.48] and 2.11 [95% CI: 1.32, 3.38], respectively) and maximum lymph node (LN) size at N1 station (≥12 mm; HR, 1.62 [95% CI: 1.15, 2.29]), in addition to clinical T category (HR, 1.51 [95% CI: 1.14, 1.99]), were independent prognostic factors for RFS. For OS, clinical N subcategories (cN1, cN2a2, and cN2b vs cN0; HRs, 1.91 [95% CI: 1.11, 3.27], 1.89 [95% CI: 1.13, 2.18], and 2.02 [95% CI: 1.07, 3.80], respectively) and LN size at N1 station (HR, 1.75 [95% CI: 1.12, 2.71]) were independent prognostic factors. For clinical N1, OS was further stratified according to LN size (log-rank test, <i>P</i> < .001). Conclusion Assessing the proposed N subcategories by reporting single versus multistation involvement of N2 disease and maximum size of metastatic LN, reflecting metastatic burden, at preoperative CT may offer useful prognostic information for planning optimal treatment strategies. <b>Keywords:</b> CT, Lung, Staging, Non-Small Cell Lung Cancer <i>Supplemental material is available for this article</i>. ©RSNA, 2024.</p>","PeriodicalId":21168,"journal":{"name":"Radiology. Cardiothoracic imaging","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11369650/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141580738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
SPECT/CT with 99mTc-DTPA in a Patient with Persistent Complex Pneumothorax after Endobronchial Valve Placement. 使用 99mTc-DTPA 的 SPECT/CT 用于一名支气管内瓣膜置入术后持续性复杂气胸患者。
IF 3.8
Radiology. Cardiothoracic imaging Pub Date : 2024-08-01 DOI: 10.1148/ryct.230377
Tina Phan, Caroline Ricard, Linda Lee, Susannah Kay, Joan Rastegar, Dustin M Walters
{"title":"SPECT/CT with <sup>99m</sup>Tc-DTPA in a Patient with Persistent Complex Pneumothorax after Endobronchial Valve Placement.","authors":"Tina Phan, Caroline Ricard, Linda Lee, Susannah Kay, Joan Rastegar, Dustin M Walters","doi":"10.1148/ryct.230377","DOIUrl":"10.1148/ryct.230377","url":null,"abstract":"<p><p>Ventilation-perfusion SPECT with or without CT using technetium 99m (<sup>99m</sup>Tc)-diethylenetriaminepentaacetic acid (DTPA) has been used to identify patterns typical of cardiopulmonary diseases, such as pulmonary embolism, pneumonia, heart failure, and obstructive lung disease. This case demonstrates the utility of a ventilation scan with SPECT/CT using <sup>99m</sup>Tc-DTPA for investigating the cause of a persistent complex pneumothorax in a patient with severe chronic obstructive pulmonary disease who recently underwent endobronchial valve placement. <b>Keywords:</b> CT-Spectral Imaging (Multienergy), SPECT/CT, Thorax, Lung <i>Supplemental material is available for this article.</i> © RSNA, 2024.</p>","PeriodicalId":21168,"journal":{"name":"Radiology. Cardiothoracic imaging","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11369649/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141902775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multimodality Imaging of Congenital Intrapericardial Diaphragmatic Hernia. 先天性心包内膈疝的多模态成像。
IF 3.8
Radiology. Cardiothoracic imaging Pub Date : 2024-08-01 DOI: 10.1148/ryct.240137
Yukun Cao, Lan Cheng, Cihao Xu, Heshui Shi
{"title":"Multimodality Imaging of Congenital Intrapericardial Diaphragmatic Hernia.","authors":"Yukun Cao, Lan Cheng, Cihao Xu, Heshui Shi","doi":"10.1148/ryct.240137","DOIUrl":"10.1148/ryct.240137","url":null,"abstract":"","PeriodicalId":21168,"journal":{"name":"Radiology. Cardiothoracic imaging","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11369654/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141983156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Improved Detection of Small and Low-Density Plaques in Virtual Noncontrast Imaging-based Calcium Scoring at Photon-Counting Detector CT. 在光子计数探测器 CT 上基于虚拟非对比成像的钙化评分中改进对小斑块和低密度斑块的检测。
IF 3.8
Radiology. Cardiothoracic imaging Pub Date : 2024-08-01 DOI: 10.1148/ryct.230328
Nicola Fink, Tilman Emrich, U Joseph Schoepf, Emese Zsarnoczay, Jim O'Doherty, Moritz C Halfmann, Joseph P Griffith, Daniel Pinos, Pal Suranyi, Dhiraj Baruah, Ismail M Kabakus, Jens Ricke, Akos Varga-Szemes
{"title":"Improved Detection of Small and Low-Density Plaques in Virtual Noncontrast Imaging-based Calcium Scoring at Photon-Counting Detector CT.","authors":"Nicola Fink, Tilman Emrich, U Joseph Schoepf, Emese Zsarnoczay, Jim O'Doherty, Moritz C Halfmann, Joseph P Griffith, Daniel Pinos, Pal Suranyi, Dhiraj Baruah, Ismail M Kabakus, Jens Ricke, Akos Varga-Szemes","doi":"10.1148/ryct.230328","DOIUrl":"10.1148/ryct.230328","url":null,"abstract":"<p><p>Purpose To investigate the impact of plaque size and density on virtual noncontrast (VNC)-based coronary artery calcium scoring (CACS) using photon-counting detector CT and to provide safety net reconstructions for improved detection of subtle plaques in patients whose VNC-based CACS would otherwise be erroneously zero when compared with true noncontrast (TNC)-based CACS. Materials and Methods In this prospective study, CACS was evaluated in a phantom containing calcifications with different diameters (5, 3, and 1 mm) and densities (800, 400, and 200 mg/cm<sup>3</sup>) and in participants who underwent TNC and contrast-enhanced cardiac photon-counting detector CT (July 2021-March 2022). VNC images were reconstructed at different virtual monoenergetic imaging (55-80 keV) and quantum iterative reconstruction (QIR) levels (QIR,1-4). TNC scans at 70 keV with QIR off served as the reference standard. In vitro CACS was analyzed using standard settings (3.0-mm sections, kernel Qr36, 130-HU threshold). Calcification detectability and CACS of small and low-density plaques were also evaluated using 1.0-mm sections, kernel Qr44, and 120- or 110-HU thresholds. Safety net reconstructions were defined based on background Agatston scores and evaluated in vivo in TNC plaques initially nondetectable using standard VNC reconstructions. Results The in vivo cohort included 63 participants (57.8 years ± 15.5 [SD]; 37 [59%] male, 26 [41%] female). Correlation and agreement between standard CACS<sub>VNC</sub> and CACS<sub>TNC</sub> were higher in large- and medium-sized and high- and medium-density than in low-density plaques (in vitro: intraclass correlation coefficient [ICC] ≥ 0.90; <i>r</i> > 0.9 vs ICC = 0.20-0.48; <i>r</i> = 0.5-0.6). Small plaques were not detectable using standard VNC reconstructions. Calcification detectability was highest using 1.0-mm sections, kernel Qr44, 120- and 110-HU thresholds, and QIR level of 2 or less VNC reconstructions. Compared with standard VNC, using safety net reconstructions (55 keV, QIR 2, 110-HU threshold) for in vivo subtle plaque detection led to higher detection (increased by 89% [50 of 56]) and improved correlation and agreement of CACS<sub>VNC</sub> with CACS<sub>TNC</sub> (in vivo: ICC = 0.51-0.61; <i>r</i> = 0.6). Conclusion Compared with TNC-based calcium scoring, VNC-based calcium scoring was limited for small and low-density plaques but improved using safety net reconstructions, which may be particularly useful in patients with low calcium scores who would otherwise be treated based on potentially false-negative results. <b>Keywords:</b> Coronary Artery Calcium CT, Photon-Counting Detector CT, Virtual Noncontrast, Plaque Size, Plaque Density <i>Supplemental material is available for this article.</i> © RSNA, 2024.</p>","PeriodicalId":21168,"journal":{"name":"Radiology. Cardiothoracic imaging","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11369658/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141634378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Characterizing Lung Parenchymal Aeration via Standardized Signal Intensity from Free-breathing 4D Dynamic MRI in Phantoms, Healthy Children, and Pediatric Patients with Thoracic Insufficiency Syndrome. 通过模型、健康儿童和胸廓发育不全综合征儿科患者自由呼吸 4D 动态核磁共振成像的标准化信号强度描述肺实质通气情况。
IF 3.8
Radiology. Cardiothoracic imaging Pub Date : 2024-08-01 DOI: 10.1148/ryct.230262
Yubing Tong, Jayaram K Udupa, Joseph M McDonough, Caiyun Wu, Lipeng Xie, Chamith S Rajapakse, Samantha Gogel, Sulagna Sarkar, Oscar H Mayer, Jason B Anari, Drew A Torigian, Patrick J Cahill
{"title":"Characterizing Lung Parenchymal Aeration via Standardized Signal Intensity from Free-breathing 4D Dynamic MRI in Phantoms, Healthy Children, and Pediatric Patients with Thoracic Insufficiency Syndrome.","authors":"Yubing Tong, Jayaram K Udupa, Joseph M McDonough, Caiyun Wu, Lipeng Xie, Chamith S Rajapakse, Samantha Gogel, Sulagna Sarkar, Oscar H Mayer, Jason B Anari, Drew A Torigian, Patrick J Cahill","doi":"10.1148/ryct.230262","DOIUrl":"10.1148/ryct.230262","url":null,"abstract":"<p><p>Purpose To investigate free-breathing thoracic bright-blood four-dimensional (4D) dynamic MRI (dMRI) to characterize aeration of parenchymal lung tissue in healthy children and patients with thoracic insufficiency syndrome (TIS). Materials and Methods All dMR images in patients with TIS were collected from July 2009 to June 2017. Standardized signal intensity (sSI) was investigated, first using a lung aeration phantom to establish feasibility and sensitivity and then in a retrospective research study of 40 healthy children (16 male, 24 female; mean age, 9.6 years ± 2.1 [SD]), 20 patients with TIS before and after surgery (11 male, nine female; mean age, 6.2 years ± 4.2), and another 10 healthy children who underwent repeated dMRI examinations (seven male, three female; mean age, 9 years ± 3.6). Individual lungs in 4D dMR images were segmented, and sSI was assessed for each lung at end expiration (EE), at end inspiration (EI), preoperatively, postoperatively, in comparison to normal lungs, and in repeated scans. Results Air content changes of approximately 6% were detectable in phantoms via sSI. sSI within phantoms significantly correlated with air occupation (Pearson correlation coefficient = -0.96 [<i>P</i> < .001]). For healthy children, right lung sSI was significantly lower than that of left lung sSI (at EE: 41 ± 6 vs 47 ± 6 and at EI: 39 ± 6 vs 43 ± 7, respectively; <i>P</i> < .001), lung sSI at EI was significantly lower than that at EE (<i>P</i> < .001), and left lung sSI at EE linearly decreased with age (<i>r</i> = -0.82). Lung sSI at EE and EI decreased after surgery for patients (although not statistically significantly, with <i>P</i> values of sSI before surgery vs sSI after surgery, left and right lung separately, in the range of 0.13-0.51). sSI varied within 1.6%-4.7% between repeated scans. Conclusion This study demonstrates the feasibility of detecting change in sSI in phantoms via bright-blood dMRI when air occupancy changes. The observed reduction in average lung sSI after surgery in pediatric patients with TIS may indicate postoperative improvement in parenchymal aeration. <b>Keywords:</b> MR Imaging, Thorax, Lung, Pediatrics, Thoracic Surgery, Lung Parenchymal Aeration, Free-breathing Dynamic MRI, MRI Intensity Standardization, Thoracic Insufficiency Syndrome <i>Supplemental material is available for this article.</i> © RSNA, 2024.</p>","PeriodicalId":21168,"journal":{"name":"Radiology. Cardiothoracic imaging","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11369656/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141760692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Safety Net Reconstruction to Catch Low-Density and Low-Volume Calcifications at Photon-Counting Detector CT Using Virtual Noncontrast Imaging. 利用虚拟非对比成像进行安全网重建,捕捉光子计数探测器 CT 上的低密度和低容积钙化。
IF 3.8
Radiology. Cardiothoracic imaging Pub Date : 2024-08-01 DOI: 10.1148/ryct.240266
Prabhakar Shantha Rajiah, Kishore Rajendran
{"title":"Safety Net Reconstruction to Catch Low-Density and Low-Volume Calcifications at Photon-Counting Detector CT Using Virtual Noncontrast Imaging.","authors":"Prabhakar Shantha Rajiah, Kishore Rajendran","doi":"10.1148/ryct.240266","DOIUrl":"10.1148/ryct.240266","url":null,"abstract":"","PeriodicalId":21168,"journal":{"name":"Radiology. Cardiothoracic imaging","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11369647/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142018490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enabling Reliable Visual Detection of Chronic Myocardial Infarction with Native T1 Cardiac MRI Using Data-Driven Native Contrast Mapping. 利用数据驱动的原位对比度映射,通过原位 T1 心脏 MRI 对慢性心肌梗死进行可靠的视觉检测。
IF 3.8
Radiology. Cardiothoracic imaging Pub Date : 2024-08-01 DOI: 10.1148/ryct.230338
Khalid Youssef, Xinheng Zhang, Ghazal Yoosefian, Yinyin Chen, Shing Fai Chan, Hsin-Jung Yang, Keyur Vora, Andrew Howarth, Andreas Kumar, Behzad Sharif, Rohan Dharmakumar
{"title":"Enabling Reliable Visual Detection of Chronic Myocardial Infarction with Native T1 Cardiac MRI Using Data-Driven Native Contrast Mapping.","authors":"Khalid Youssef, Xinheng Zhang, Ghazal Yoosefian, Yinyin Chen, Shing Fai Chan, Hsin-Jung Yang, Keyur Vora, Andrew Howarth, Andreas Kumar, Behzad Sharif, Rohan Dharmakumar","doi":"10.1148/ryct.230338","DOIUrl":"10.1148/ryct.230338","url":null,"abstract":"<p><p>Purpose To investigate whether infarct-to-remote myocardial contrast can be optimized by replacing generic fitting algorithms used to obtain native T1 maps with a data-driven machine learning pixel-wise approach in chronic reperfused infarct in a canine model. Materials and Methods A controlled large animal model (24 canines, equal male and female animals) of chronic myocardial infarction with histologic evidence of heterogeneous infarct tissue composition was studied. Unsupervised clustering techniques using self-organizing maps and <i>t</i>-distributed stochastic neighbor embedding were used to analyze and visualize native T1-weighted pixel-intensity patterns. Deep neural network models were trained to map pixel-intensity patterns from native T1-weighted image series to corresponding pixels on late gadolinium enhancement (LGE) images, yielding visually enhanced noncontrast maps, a process referred to as <i>data-driven native mapping</i> (DNM). Pearson correlation coefficients and Bland-Altman analyses were used to compare findings from the DNM approach against standard T1 maps. Results Native T1-weighted images exhibited distinct pixel-intensity patterns between infarcted and remote territories. Granular pattern visualization revealed higher infarct-to-remote cluster separability with LGE labeling as compared with native T1 maps. Apparent contrast-to-noise ratio from DNM (mean, 15.01 ± 2.88 [SD]) was significantly different from native T1 maps (5.64 ± 1.58; <i>P</i> < .001) but similar to LGE contrast-to-noise ratio (15.51 ± 2.43; <i>P</i> = .40). Infarcted areas based on LGE were more strongly correlated with DNM compared with native T1 maps (<i>R</i><sup>2</sup> = 0.71 for native T1 maps vs LGE; <i>R</i><sup>2</sup> = 0.85 for DNM vs LGE; <i>P</i> < .001). Conclusion Native T1-weighted pixels carry information that can be extracted with the proposed DNM approach to maximize image contrast between infarct and remote territories for enhanced visualization of chronic infarct territories. <b>Keywords:</b> Chronic Myocardial Infarction, Cardiac MRI, Data-Driven Native Contrast Mapping <i>Supplemental material is available for this article.</i> © RSNA, 2024.</p>","PeriodicalId":21168,"journal":{"name":"Radiology. Cardiothoracic imaging","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11369652/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141634376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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