1
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Fallon I, Hernando H, Almacellas-Rabaiget O, Marti-Fuster B, Spadoni C, Bigner DD, Méndez E. Development of a high-throughput screening platform to identify new therapeutic agents for Medulloblastoma Group 3. SLAS Discov 2024; 29:100147. [PMID: 38355016 DOI: 10.1016/j.slasd.2024.100147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Revised: 01/29/2024] [Accepted: 02/08/2024] [Indexed: 02/16/2024]
Abstract
Pediatric brain tumors (PBTs) represent about 25 % of all pediatric cancers and are the most common solid tumors in children and adolescents. Medulloblastoma (MB) is the most frequently occurring malignant PBT, accounting for almost 10 % of all pediatric cancer deaths. MB Group 3 (MB G3) accounts for 25-30 % of all MB cases and has the worst outcome, particularly when associated with MYC amplification. However, no targeted treatments for this group have been developed so far. Here we describe a unique high throughput screening (HTS) platform specifically designed to identify new therapies for MB G3. The platform incorporates optimized and validated 2D and 3D efficacy and toxicity models, that account for tumor heterogenicity, limited efficacy and unacceptable toxicity from the very early stage of drug discovery. The platform has been validated by conducting a pilot HTS campaign with a 1280 lead-like compound library. Results showed 8 active compounds, targeting MB reported targets and several are currently approved or in clinical trials for pediatric patients with PBTs, including MB. Moreover, hits were combined to avoid tumor resistance, identifying 3 synergistic pairs, one of which is currently under clinical study for recurrent MB and other PBTs.
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Affiliation(s)
- Inés Fallon
- Oncoheroes Biosciences S.L., Barcelona, Spain; Grup d'Enginyeria de Materials, Institut Químic de Sarrià, Universitat Ramon Llull, Barcelona, 08017, Spain
| | | | | | | | | | - Darell D Bigner
- Department of Neurosurgery, Duke University, Durham, NC, USA
| | - Eva Méndez
- Oncoheroes Biosciences S.L., Barcelona, Spain.
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2
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Soenksen LR, Kassis T, Conover ST, Marti-Fuster B, Birkenfeld JS, Tucker-Schwartz J, Naseem A, Stavert RR, Kim CC, Senna MM, Avilés-Izquierdo J, Collins JJ, Barzilay R, Gray ML. Using deep learning for dermatologist-level detection of suspicious pigmented skin lesions from wide-field images. Sci Transl Med 2021; 13:13/581/eabb3652. [PMID: 33597262 DOI: 10.1126/scitranslmed.abb3652] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 08/17/2020] [Accepted: 01/08/2021] [Indexed: 11/03/2022]
Abstract
A reported 96,480 people were diagnosed with melanoma in the United States in 2019, leading to 7230 reported deaths. Early-stage identification of suspicious pigmented lesions (SPLs) in primary care settings can lead to improved melanoma prognosis and a possible 20-fold reduction in treatment cost. Despite this clinical and economic value, efficient tools for SPL detection are mostly absent. To bridge this gap, we developed an SPL analysis system for wide-field images using deep convolutional neural networks (DCNNs) and applied it to a 38,283 dermatological dataset collected from 133 patients and publicly available images. These images were obtained from a variety of consumer-grade cameras (15,244 nondermoscopy) and classified by three board-certified dermatologists. Our system achieved more than 90.3% sensitivity (95% confidence interval, 90 to 90.6) and 89.9% specificity (89.6 to 90.2%) in distinguishing SPLs from nonsuspicious lesions, skin, and complex backgrounds, avoiding the need for cumbersome individual lesion imaging. We also present a new method to extract intrapatient lesion saliency (ugly duckling criteria) on the basis of DCNN features from detected lesions. This saliency ranking was validated against three board-certified dermatologists using a set of 135 individual wide-field images from 68 dermatological patients not included in the DCNN training set, exhibiting 82.96% (67.88 to 88.26%) agreement with at least one of the top three lesions in the dermatological consensus ranking. This method could allow for rapid and accurate assessments of pigmented lesion suspiciousness within a primary care visit and could enable improved patient triaging, utilization of resources, and earlier treatment of melanoma.
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Affiliation(s)
- Luis R Soenksen
- Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139, USA. .,Institute for Medical Engineering and Science, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139, USA.,Wyss Institute for Biologically Inspired Engineering, Harvard University, 3 Blackfan Cir, Boston, MA 02115, USA.,Harvard-MIT Program in Health Sciences and Technology, Cambridge, MA 02139, USA.,MIT linQ, Massachusetts Institute of Technology Cambridge, MA 02148, USA
| | - Timothy Kassis
- Department of Biological Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, 02139, MA, USA
| | - Susan T Conover
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139, USA
| | - Berta Marti-Fuster
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139, USA.,MIT linQ, Massachusetts Institute of Technology Cambridge, MA 02148, USA
| | - Judith S Birkenfeld
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139, USA.,MIT linQ, Massachusetts Institute of Technology Cambridge, MA 02148, USA
| | - Jason Tucker-Schwartz
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139, USA.,MIT linQ, Massachusetts Institute of Technology Cambridge, MA 02148, USA
| | - Asif Naseem
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139, USA.,MIT linQ, Massachusetts Institute of Technology Cambridge, MA 02148, USA
| | - Robert R Stavert
- Division of Dermatology, Cambridge Health Alliance, 1493 Cambridge Street, Cambridge, MA 02139, USA.,Department of Dermatology, Beth Israel Deaconess Medical Center, 330 Brookline Ave, Boston, MA 02215, USA.,Department of Dermatology, Harvard Medical School, 25 Shattuck St, Boston, MA 02115, USA
| | - Caroline C Kim
- Pigmented Lesion Program, Newton Wellesley Dermatology Associates, 65 Walnut Street Suite 520 Wellesley Hills, MA 02481, USA.,Department of Dermatology, Tufts Medical Center, 260 Tremont Street Biewend Building, Boston, MA 02116, USA
| | - Maryanne M Senna
- Department of Dermatology, Harvard Medical School, 25 Shattuck St, Boston, MA 02115, USA.,Department of Dermatology, Massachusetts General Hospital, 55 Fruit St, Boston, MA 02114
| | - José Avilés-Izquierdo
- Department of Dermatology, Hospital General Universitario Gregorio Marañón, Calle del Dr. Esquerdo 46, 28007 Madrid, Spain
| | - James J Collins
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139, USA.,Wyss Institute for Biologically Inspired Engineering, Harvard University, 3 Blackfan Cir, Boston, MA 02115, USA.,Harvard-MIT Program in Health Sciences and Technology, Cambridge, MA 02139, USA.,Department of Biological Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, 02139, MA, USA.,Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA.,School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | - Regina Barzilay
- Computer Science and Artificial Intelligence Lab, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139, USA.,Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology Cambridge, MA 02148, USA
| | - Martha L Gray
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139, USA.,Harvard-MIT Program in Health Sciences and Technology, Cambridge, MA 02139, USA.,MIT linQ, Massachusetts Institute of Technology Cambridge, MA 02148, USA.,Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology Cambridge, MA 02148, USA
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3
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Birkenfeld JS, Tucker-Schwartz JM, Soenksen LR, Avilés-Izquierdo JA, Marti-Fuster B. Computer-aided classification of suspicious pigmented lesions using wide-field images. Comput Methods Programs Biomed 2020; 195:105631. [PMID: 32652382 DOI: 10.1016/j.cmpb.2020.105631] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 06/21/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND AND OBJECTIVE Early identification of melanoma is conducted through whole-body visual examinations to detect suspicious pigmented lesions, a situation that fluctuates in accuracy depending on the experience and time of the examiner. Computer-aided diagnosis tools for skin lesions are typically trained using pre-selected single-lesion images, taken under controlled conditions, which limits their use in wide-field scenes. Here, we propose a computer-aided classifier system with such input conditions to aid in the rapid identification of suspicious pigmented lesions at the primary care level. METHODS 133 patients with a multitude of skin lesions were recruited for this study. All lesions were examined by a board-certified dermatologist and classified into "suspicious" and "non-suspicious". A new clinical database was acquired and created by taking Wide-Field images of all major body parts with a consumer-grade camera under natural illumination condition and with a consistent source of image variability. 3-8 images were acquired per patient on different sites of the body, and a total of 1759 pigmented lesions were extracted. A machine learning classifier was optimized and build into a computer aided classification system to binary classify each lesion using a suspiciousness score. RESULTS In a testing set, our computer-aided classification system achieved a sensitivity of 100% for suspicious pigmented lesions that were later confirmed by dermoscopy examination ("SPL_A") and 83.2% for suspicious pigmented lesions that were not confirmed after examination ("SPL_B"). Sensitivity for non-suspicious lesions was 72.1%, and accuracy was 75.9%. With these results we defined a suspiciousness score that is aligned with common macro-screening (naked eye) practices. CONCLUSIONS This work demonstrates that wide-field photography combined with computer-aided classification systems can distinguish suspicious from non-suspicious pigmented lesions, and might be effective to assess the severity of a suspicious pigmented lesions. We believe this approach could be useful to support skin screenings at a population-level.
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Affiliation(s)
- Judith S Birkenfeld
- Research Laboratory of Electronics, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139, USA; MIT linQ, Institute for Medical Engineering and Science, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA 02139, USA; Brigham and Women's Hospital - Harvard Medical School, 75 Francis St, Boston, MA 02115, United States; Massachusetts General Hospital - Harvard Medical School, 55 Fruit St, Boston, MA 02114, United States.
| | - Jason M Tucker-Schwartz
- MIT linQ, Institute for Medical Engineering and Science, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA 02139, USA
| | - Luis R Soenksen
- Research Laboratory of Electronics, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139, USA; MIT linQ, Institute for Medical Engineering and Science, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA 02139, USA; Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139, USA; Wyss Institute for Biologically Inspired Engineering, Harvard University, 3 Blackfan Cir, Boston, MA 02115, USA; Harvard-MIT Program in Health Sciences and Technology, Cambridge, MA 02139, USA
| | - José A Avilés-Izquierdo
- Department of Dermatology, Hospital General Universitario Gregorio Marañón, Calle del Dr. Esquerdo 46, 28007 Madrid, Spain
| | - Berta Marti-Fuster
- Research Laboratory of Electronics, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139, USA; MIT linQ, Institute for Medical Engineering and Science, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA 02139, USA; Brigham and Women's Hospital - Harvard Medical School, 75 Francis St, Boston, MA 02115, United States
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4
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Mayoral M, Niñerola-Baizán A, Marti-Fuster B, Donaire A, Perissinotti A, Rumià J, Bargalló N, Sala-Llonch R, Pavia J, Ros D, Carreño M, Pons F, Setoain X. Epileptogenic Zone Localization With 18FDG PET Using a New Dynamic Parametric Analysis. Front Neurol 2019; 10:380. [PMID: 31057476 PMCID: PMC6478660 DOI: 10.3389/fneur.2019.00380] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 03/28/2019] [Indexed: 11/13/2022] Open
Abstract
Introduction: [18F]fluorodeoxyglucose (18F-FDG) positron emission tomography (PET) is part of the regular preoperative work-up in medically refractory epilepsy. As a complement to visual evaluation of PET, statistical parametric maps can help in the detection of the epileptogenic zone (EZ). However, software packages currently available are time-consuming and little intuitive for physicians. We develop a user-friendly software (referred as PET-analysis) for EZ localization in PET studies that allows dynamic real-time statistical parametric analysis. To evaluate its performance, the outcome of PET-analysis was compared with the results obtained by visual assessment and Statistical Parametric Mapping (SPM). Methods: Thirty patients with medically refractory epilepsy who underwent presurgical 18F-FDG PET with good post-operative outcomes were included. The 18F-FDG PET studies were evaluated by visual assessment, with SPM8 and PET-analysis. In SPM, parametric T-maps were thresholded at corrected p < 0.05 and cluster size k = 50 and at uncorrected p < 0.001 and k = 100 (the most used parameters in the literature). Since PET-analysis rapidly processes different threshold combinations, T-maps were thresholded with multiple p-value and different clusters sizes. The presurgical EZ identified by visual assessment, SPM and PET-analysis was compared to the confirmed EZ according to post-surgical follow-up. Results: PET-analysis obtained 66.7% (20/30) of correctly localizing studies, comparable to the 70.0% (21/30) achieved by visual assessment and significantly higher (p < 0.05) than that obtained with the SPM threshold p < 0.001/k = 100, of 36.7% (11/30). Only one study was positive, albeit non-localizing, with the SPM threshold corrected p < 0.05/k = 50. Concordance was substantial for PET-analysis (κ = 0.643) and visual interpretation (κ = 0.622), being fair for SPM (κ = 0.242). Conclusion: Compared to SPM with the fixed standard parameters, PET-analysis may be superior in EZ localization with its easy and rapid processing of different threshold combinations. The results of this initial proof-of-concept study validate the clinical use of PET-analysis as a robust objective complementary tool to visual assessment for EZ localization.
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Affiliation(s)
- Maria Mayoral
- Nuclear Medicine Department, Hospital Clínic, Barcelona, Spain
| | - Aida Niñerola-Baizán
- Biomedical Imaging Group, Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain.,Biophysics and Bioengineering Unit, Biomedicine Department, School of Medicine, University of Barcelona, Barcelona, Spain
| | - Berta Marti-Fuster
- Biomedical Imaging Group, Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain.,Biophysics and Bioengineering Unit, Biomedicine Department, School of Medicine, University of Barcelona, Barcelona, Spain
| | - Antonio Donaire
- Neurology Department, Hospital Clínic, Barcelona, Spain.,August Pi i Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain
| | | | - Jordi Rumià
- Neurosurgery Department, Hospital Clínic, Barcelona, Spain
| | - Núria Bargalló
- August Pi i Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain.,Radiology Department, Hospital Clínic, Barcelona, Spain
| | - Roser Sala-Llonch
- Biophysics and Bioengineering Unit, Biomedicine Department, School of Medicine, University of Barcelona, Barcelona, Spain
| | - Javier Pavia
- Nuclear Medicine Department, Hospital Clínic, Barcelona, Spain.,Biomedical Imaging Group, Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain.,August Pi i Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain
| | - Domènec Ros
- Biomedical Imaging Group, Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain.,Biophysics and Bioengineering Unit, Biomedicine Department, School of Medicine, University of Barcelona, Barcelona, Spain.,August Pi i Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain
| | - Mar Carreño
- Neurology Department, Hospital Clínic, Barcelona, Spain.,August Pi i Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain
| | - Francesca Pons
- Nuclear Medicine Department, Hospital Clínic, Barcelona, Spain.,August Pi i Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain
| | - Xavier Setoain
- Nuclear Medicine Department, Hospital Clínic, Barcelona, Spain.,Biomedical Imaging Group, Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain.,August Pi i Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain
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5
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Onieva JO, Marti-Fuster B, de la Puente MP, José Estépar RS. Diffeomorphic Lung Registration Using Deep CNNs and Reinforced Learning. Image Anal Mov Organ Breast Thorac Images (2018) 2018; 11040:284-294. [PMID: 32490436 DOI: 10.1007/978-3-030-00946-5_28] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Image registration is a well-known problem in the field of medical imaging. In this paper, we focus on the registration of chest inspiratory and expiratory computed tomography (CT) scans from the same patient. Our method recovers the diffeomorphic elastic displacement vector field (DVF) by jointly regressing the direct and the inverse transformation. Our architecture is based on the RegNet network but we implement a reinforced learning strategy that can accommodate a large training dataset. Our results show that our method performs with a lower estimation error for the same number of epochs than the RegNet approach.
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Affiliation(s)
- Jorge Onieva Onieva
- Applied Chest Imaging Laboratory, Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Berta Marti-Fuster
- Applied Chest Imaging Laboratory, Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - María Pedrero de la Puente
- Applied Chest Imaging Laboratory, Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Raúl San José Estépar
- Applied Chest Imaging Laboratory, Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
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6
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Perissinotti A, Niñerola-Baizán A, Rubí S, Carreño M, Marti-Fuster B, Aparicio J, Mayoral M, Donaire A, Sanchez-Izquierdo N, Bargalló N, Rumiá J, Boget T, Pons F, Lomeña F, Ros D, Pavía J, Setoain X. PISCOM: a new procedure for epilepsy combining ictal SPECT and interictal PET. Eur J Nucl Med Mol Imaging 2018; 45:2358-2367. [PMID: 30069576 PMCID: PMC6208811 DOI: 10.1007/s00259-018-4080-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 06/25/2018] [Indexed: 10/28/2022]
Abstract
PURPOSE We present a modified version of the SISCOM procedure that uses interictal PET instead of interictal SPECT for seizure onset zone localization. We called this new nuclear imaging processing technique PISCOM (PET interictal subtracted ictal SPECT coregistered with MRI). METHODS We retrospectively studied 23 patients (age range 4-61 years) with medically refractory epilepsy who had undergone MRI, ictal SPECT, interictal SPECT and interictal FDG PET and who had been seizure-free for at least 2 years after surgical treatment. FDG PET images were reprocessed (rFDG PET) to assimilate SPECT features for image subtraction. Interictal SPECT and rFDG PET were compared using statistical parametric mapping (SPM). PISCOM and SISCOM images were evaluated visually and using an automated volume of interest-based analysis. The results of the two studies were compared with each other and with the known surgical resection site. RESULTS SPM showed no significant differences in cortical activity between SPECT and rFDG PET images. PISCOM and SISCOM showed equivalent results in 17 of 23 patients (74%). The seizure onset zone was successfully identified in 19 patients (83%) by PISCOM and in 17 (74%) by SISCOM: in 15 patients (65%) the two techniques showed concordant successful results. The volume of interest-based analysis showed no significant differences between PISCOM and SISCOM in identifying the extension of the seizure onset zone. However, PISCOM showed a lower amount of indeterminate activity due to propagation, background or artefacts. CONCLUSION Preliminary findings of this initial proof-of-concept study suggest that perfusion and glucose metabolism in the cerebral cortex can be correlated and that PISCOM may be a valid technique for identification of the seizure onset zone. However, further studies are needed to validate these results.
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Affiliation(s)
- Andrés Perissinotti
- Department of Nuclear Medicine, Hospital Clínic, C/Villarroel 170, 08036, Barcelona, Spain
| | - Aida Niñerola-Baizán
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain.,University of Barcelona, Barcelona, Spain
| | - Sebastià Rubí
- Nuclear Medicine Department, Hospital Universitari Son Espases, Palma, Spain.,Institut d'Investigació Sanitària Illes Balears (IdISBa), Palma, Spain
| | - Mar Carreño
- Department of Neurology, Hospital Clínic, Barcelona, Spain
| | - Berta Marti-Fuster
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain.,University of Barcelona, Barcelona, Spain
| | - Javier Aparicio
- Department of Neurology, Hospital Sant Joan de Déu, Barcelona, Spain
| | - Maria Mayoral
- Department of Nuclear Medicine, Hospital Clínic, C/Villarroel 170, 08036, Barcelona, Spain
| | | | | | - Nuria Bargalló
- Department of Radiology, Hospital Clínic, Barcelona, Spain
| | - Jordi Rumiá
- Department of Neurosurgery, Hospital Clínic, Barcelona, Spain
| | - Teresa Boget
- Department of Psychiatry and Psychology, Hospital Clínic, Barcelona, Spain
| | - Francesca Pons
- Department of Nuclear Medicine, Hospital Clínic, C/Villarroel 170, 08036, Barcelona, Spain.,University of Barcelona, Barcelona, Spain
| | - Francisco Lomeña
- Department of Nuclear Medicine, Hospital Clínic, C/Villarroel 170, 08036, Barcelona, Spain
| | - Domènec Ros
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain.,University of Barcelona, Barcelona, Spain
| | - Javier Pavía
- Department of Nuclear Medicine, Hospital Clínic, C/Villarroel 170, 08036, Barcelona, Spain.,Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain
| | - Xavier Setoain
- Department of Nuclear Medicine, Hospital Clínic, C/Villarroel 170, 08036, Barcelona, Spain. .,Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain. .,University of Barcelona, Barcelona, Spain.
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7
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Jimenez X, Shukla SK, Ortega I, Illana FJ, Castro-González C, Marti-Fuster B, Butterworth I, Arroyo M, Anthony B, Elvira L. Quantification of Very Low Concentrations of Leukocyte Suspensions In Vitro by High-Frequency Ultrasound. Ultrasound Med Biol 2016; 42:1568-1573. [PMID: 27067281 DOI: 10.1016/j.ultrasmedbio.2016.01.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 01/28/2016] [Accepted: 01/30/2016] [Indexed: 06/05/2023]
Abstract
Accurate measurement of very low cerebrospinal fluid (CSF) white blood cell (WBC) concentration is key to the diagnosis of bacterial meningitis, lethal if not promptly treated. Here we show that high frequency ultrasound (HFUS) can detect CSF WBC in vitro in concentrations relevant to meningitis diagnosis with a much finer precision than gold standard manual counting in a Fuchs-Rosenthal chamber. WBC concentrations in a mock CSF model, in the range 0-50 WBC/μL, have been tested and compared to gold standard ground truth. In this range, excellent agreement (Cohen's kappa [κ] = 0.78-90) (Cohen 1960) was observed between HFUS and the gold standard method. The presented experimental set-up allowed us to detect WBC concentrations as low as 2 cells/μL. HFUS shows promise as a low-cost, reliable and automated technology to measure very low CSF WBC concentrations for the diagnosis of early meningitis.
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Affiliation(s)
- Xavier Jimenez
- Madrid-MIT M+Vision Consortium, Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, USA.
| | - Shiva K Shukla
- Instituto de Tecnologías Físicas y de la Información, Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - Isabel Ortega
- Proteomic and Metabolomic Unit, Clinical Laboratory Department, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos, Madrid, Spain
| | - Francisco J Illana
- Proteomic and Metabolomic Unit, Clinical Laboratory Department, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos, Madrid, Spain
| | - Carlos Castro-González
- Madrid-MIT M+Vision Consortium, Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Berta Marti-Fuster
- Madrid-MIT M+Vision Consortium, Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, USA; Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, 02129 Charlestown, MA, USA
| | - Ian Butterworth
- Madrid-MIT M+Vision Consortium, Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Manuel Arroyo
- Proteomic and Metabolomic Unit, Clinical Laboratory Department, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos, Madrid, Spain
| | - Brian Anthony
- Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, 02139 Cambridge, MA, USA
| | - Luis Elvira
- Instituto de Tecnologías Físicas y de la Información, Consejo Superior de Investigaciones Científicas, Madrid, Spain
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8
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Mayoral M, Marti-Fuster B, Carreño M, Carrasco JL, Bargalló N, Donaire A, Rumià J, Perissinotti A, Lomeña F, Pintor L, Boget T, Setoain X. Seizure-onset zone localization by statistical parametric mapping in visually normal18F-FDG PET studies. Epilepsia 2016; 57:1236-44. [DOI: 10.1111/epi.13427] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/02/2016] [Indexed: 11/30/2022]
Affiliation(s)
- Maria Mayoral
- Nuclear Medicine Department; Hospital Clinic; Barcelona Spain
| | - Berta Marti-Fuster
- Biomedical Imaging Group; Biomedical Research Networking Center in Bioengineering; Biomaterials and Nanomedicine (CIBER-BBN); Barcelona Spain
- Biophysics and Bioengineering Unit; Physiological Sciences Department I; School of Medicine; University of Barcelona; Spain
| | - Mar Carreño
- Neurology Department; Hospital Clinic; Barcelona Spain
- August Pi i Sunyer Biomedical Research Institute (IDIBAPS); Barcelona Spain
| | - Josep L. Carrasco
- Biostatistics; Public Health Department; School of Medicine; University of Barcelona; Barcelona Spain
| | - Núria Bargalló
- August Pi i Sunyer Biomedical Research Institute (IDIBAPS); Barcelona Spain
- Radiology Department; Hospital Clinic; Barcelona Spain
| | - Antonio Donaire
- Neurology Department; Hospital Clinic; Barcelona Spain
- August Pi i Sunyer Biomedical Research Institute (IDIBAPS); Barcelona Spain
| | - Jordi Rumià
- Neurosurgery Department; Hospital Clinic; Barcelona Spain
| | | | - Francisco Lomeña
- Nuclear Medicine Department; Hospital Clinic; Barcelona Spain
- August Pi i Sunyer Biomedical Research Institute (IDIBAPS); Barcelona Spain
| | - Luis Pintor
- August Pi i Sunyer Biomedical Research Institute (IDIBAPS); Barcelona Spain
- Psychiatry and Psychology Department; Hospital Clinic; Barcelona Spain
| | - Teresa Boget
- August Pi i Sunyer Biomedical Research Institute (IDIBAPS); Barcelona Spain
- Psychiatry and Psychology Department; Hospital Clinic; Barcelona Spain
| | - Xavier Setoain
- Nuclear Medicine Department; Hospital Clinic; Barcelona Spain
- Biomedical Imaging Group; Biomedical Research Networking Center in Bioengineering; Biomaterials and Nanomedicine (CIBER-BBN); Barcelona Spain
- August Pi i Sunyer Biomedical Research Institute (IDIBAPS); Barcelona Spain
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Marti-Fuster B, Esteban O, Thielemans K, Setoain X, Santos A, Ros D, Pavia J. Including anatomical and functional information in MC simulation of PET and SPECT brain studies. Brain-VISET: a voxel-based iterative method. IEEE Trans Med Imaging 2014; 33:1931-1938. [PMID: 24876110 DOI: 10.1109/tmi.2014.2326041] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Monte Carlo (MC) simulation provides a flexible and robust framework to efficiently evaluate and optimize image processing methods in emission tomography. In this work we present Brain-VISET (Voxel-based Iterative Simulation for Emission Tomography), a method that aims to simulate realistic [ (99m) Tc]-SPECT and [ (18) F]-PET brain databases by including anatomical and functional information. To this end, activity and attenuation maps generated using high-resolution anatomical images from patients were used as input maps in a MC projector to simulate SPECT or PET sinograms. The reconstructed images were compared with the corresponding real SPECT or PET studies in an iterative process where the activity inputs maps were being modified at each iteration. Datasets of 30 refractory epileptic patients were used to assess the new method. Each set consisted of structural images (MRI and CT) and functional studies (SPECT and PET), thereby allowing the inclusion of anatomical and functional variability in the simulation input models. SPECT and PET sinograms were obtained using the SimSET package and were reconstructed with the same protocols as those employed for the clinical studies. The convergence of Brain-VISET was evaluated by studying the behavior throughout iterations of the correlation coefficient, the quotient image histogram and a ROI analysis comparing simulated with real studies. The realism of generated maps was also evaluated. Our findings show that Brain-VISET is able to generate realistic SPECT and PET studies and that four iterations is a suitable number of iterations to guarantee a good agreement between simulated and real studies.
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