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  1. Book: State of the art evaluation of the head and neck

    Srinivasan, Ashok

    (Neuroimaging clinics of North America ; volume 30, number 3 (August 2020))

    2020  

    Author's details editor Ashok Srinivasan
    Series title Neuroimaging clinics of North America ; volume 30, number 3 (August 2020)
    Collection
    Language English
    Size xvii Seiten, Seite 261-391, Illustrationen
    Publisher Elsevier
    Publishing place Philadelphia, Pennsylvania
    Publishing country United States
    Document type Book
    HBZ-ID HT020568824
    ISBN 978-0-323-75588-7 ; 0-323-75588-7
    Database Catalogue ZB MED Medicine, Health

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    In stock of ZB MED Cologne/Königswinter

    Shelf markLoan statusLocation
    Se 1309 -30,3- verfügbar in Königswinter Königswinter

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  2. Article ; Online: Demyelinating and Neuroinflammatory Diseases of the Brain and the Spine.

    Forghani, Reza / Srinivasan, Ashok

    Magnetic resonance imaging clinics of North America

    2024  Volume 32, Issue 2, Page(s) xv–xvi

    MeSH term(s) Humans ; Neuroinflammatory Diseases ; Magnetic Resonance Imaging/methods ; Brain/diagnostic imaging ; Spine/diagnostic imaging ; Head
    Language English
    Publishing date 2024-02-13
    Publishing country United States
    Document type Editorial
    ZDB-ID 1196851-5
    ISSN 1557-9786 ; 1064-9689
    ISSN (online) 1557-9786
    ISSN 1064-9689
    DOI 10.1016/j.mric.2024.01.005
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Head and Neck Imaging in the Twenty-First Century.

    Srinivasan, Ashok

    Neuroimaging clinics of North America

    2020  Volume 30, Issue 3, Page(s) xvii

    MeSH term(s) Diagnostic Imaging ; Head/diagnostic imaging ; Head and Neck Neoplasms/diagnostic imaging ; Humans ; Neck/diagnostic imaging
    Language English
    Publishing date 2020-06-11
    Publishing country United States
    Document type Editorial
    ZDB-ID 1314594-0
    ISSN 1557-9867 ; 1052-5149
    ISSN (online) 1557-9867
    ISSN 1052-5149
    DOI 10.1016/j.nic.2020.05.004
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Using iAUC

    Srinivasan, Ashok

    Radiology. Imaging cancer

    2019  Volume 1, Issue 2, Page(s) e194012

    MeSH term(s) Brain Neoplasms/therapy ; Humans ; Hyperthermia, Induced ; Lasers ; Magnetic Resonance Imaging ; Pilot Projects
    Language English
    Publishing date 2019-11-29
    Publishing country United States
    Document type Journal Article ; Comment
    ISSN 2638-616X
    ISSN (online) 2638-616X
    DOI 10.1148/rycan.2019194012
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Multiple Sclerosis Part 2: Advanced Imaging and Emerging Techniques.

    Mishra, Shruti / Bapuraj, Jayapalli / Srinivasan, Ashok

    Magnetic resonance imaging clinics of North America

    2024  Volume 32, Issue 2, Page(s) 221–231

    Abstract: Multiple advanced imaging methods for multiple sclerosis (MS) have been in investigation to identify new imaging biomarkers for early disease detection, predicting disease prognosis, and clinical trial endpoints. Multiple techniques probing different ... ...

    Abstract Multiple advanced imaging methods for multiple sclerosis (MS) have been in investigation to identify new imaging biomarkers for early disease detection, predicting disease prognosis, and clinical trial endpoints. Multiple techniques probing different aspects of tissue microstructure (ie, advanced diffusion imaging, magnetization transfer, myelin water imaging, magnetic resonance spectroscopy, glymphatic imaging, and perfusion) support the notion that MS is a global disease with microstructural changes evident in normal-appearing white and gray matter. These global changes are likely better predictors of disability compared with lesion load alone. Emerging techniques in glymphatic and molecular imaging may improve understanding of pathophysiology and emerging treatments.
    MeSH term(s) Humans ; Magnetic Resonance Imaging/methods ; Multiple Sclerosis/diagnostic imaging ; Multiple Sclerosis/pathology ; Brain/diagnostic imaging
    Language English
    Publishing date 2024-02-09
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 1196851-5
    ISSN 1557-9786 ; 1064-9689
    ISSN (online) 1557-9786
    ISSN 1064-9689
    DOI 10.1016/j.mric.2024.01.002
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  6. Article ; Online: Postoperative Imaging Appearances of the Paranasal Sinuses.

    Agarwal, Mohit / Lobo, Remy / Srinivasan, Ashok

    Seminars in roentgenology

    2023  Volume 58, Issue 3, Page(s) 248–260

    MeSH term(s) Humans ; Paranasal Sinuses/diagnostic imaging ; Paranasal Sinuses/surgery ; Diagnostic Imaging ; Paranasal Sinus Diseases/diagnostic imaging ; Paranasal Sinus Diseases/surgery
    Language English
    Publishing date 2023-04-22
    Publishing country United States
    Document type Journal Article
    ZDB-ID 80310-8
    ISSN 1558-4658 ; 0037-198X
    ISSN (online) 1558-4658
    ISSN 0037-198X
    DOI 10.1053/j.ro.2023.03.003
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Comparison of Image Quality and Radiation Dose in Pediatric Temporal Bone CT using Photon Counting Detectors CT and Energy Integrating Detectors CT.

    Lee, Jeong Sub / Kim, John / Bapuraj, Jayapalli R / Srinivasan, Ashok

    AJNR. American journal of neuroradiology

    2024  

    Abstract: Background and purpose: To compare the image quality and radiation dose of temporal bone CT scans in pediatric patients acquired with photon counting detectors (PCD) CT and energy integrating detectors (EID) CT.: Materials and methods: The ... ...

    Abstract Background and purpose: To compare the image quality and radiation dose of temporal bone CT scans in pediatric patients acquired with photon counting detectors (PCD) CT and energy integrating detectors (EID) CT.
    Materials and methods: The retrospective study included a total of 110 pediatric temporal bone CT scans (PCD-CT, n=52; EIDCT, n=58). Two independent readers evaluated the spatial resolution of 4 anatomical structures (tympanic membrane, incudostapedial joint, stapedial crura, and cochlear modiolus) and overall image quality using a 4-point scale. Inter-reader agreement was assessed. Dose length product (DLP) for each CT was compared, and subgroup analyses were performed based on age (under 3 years, 3-5 years, 6-11 years, and 12 years and above).
    Results: PCD-CT demonstrated statistically significantly higher scores than EID-CT for all items (tympanic membrane, 2.9 vs. 2.4; incudostapedial joint, 3.6 vs. 2.6, stapedial crura, 3.2 vs. 2.4; cochlear modiolus, 3.4 vs. 2.8; overall image quality, 3.6 vs. 2.8; p<0.05). Inter-reader agreement ranged from good to excellent (ICCs, 0.6-0.81). PCD-CT exhibited a 43% dose reduction compared to EID-CT, with a particularly substantial reduction of over 70% in the subgroups of children under 6 years.
    Conclusions: PCD temporal bone CT achieves significantly superior imaging quality at a lower radiation dose compared to EID-CT.
    Abbreviations: PCD-CT = photon counting detectors CT; EID-CT = energy integrating detectors CT; DLP = dose length product; AEC = automatic exposure control; ICC = interclass correlation coefficient.
    Language English
    Publishing date 2024-04-08
    Publishing country United States
    Document type Journal Article
    ZDB-ID 603808-6
    ISSN 1936-959X ; 0195-6108
    ISSN (online) 1936-959X
    ISSN 0195-6108
    DOI 10.3174/ajnr.A8276
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Dynamic contrast-enhanced MRI parameters and apparent diffusion coefficient as treatment response markers of skull base osteomyelitis: a preliminary study.

    Baba, Akira / Kurokawa, Ryo / Kurokawa, Mariko / Srinivasan, Ashok

    Polish journal of radiology

    2023  Volume 88, Page(s) e319–e324

    Abstract: Purpose: Currently, there is no definitive consensus on the optimal imaging modality for determining the treatment response in patients with skull base osteomyelitis (SBO). This study aimed to investigate the utility of dynamic contrast-enhanced ... ...

    Abstract Purpose: Currently, there is no definitive consensus on the optimal imaging modality for determining the treatment response in patients with skull base osteomyelitis (SBO). This study aimed to investigate the utility of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) parameters and apparent diffusion coefficient (ADC) as treatment response markers of SBO.
    Material and methods: This study included 6 patients with SBO, who underwent both pre- and post-treatment DCE-MRI and diffusion-weighted imaging (DWI). Quantitative DCE-MRI parameters and ADC of the region-of-interest were analysed. These normalized parameters were calculated by dividing the region-of-interest by the reference region. The Wilcoxon signed rank test was used to compare these parameters between pre- and post-treatment periods.
    Results: The normalized fraction of the extravascular extracellular space (V
    Conclusions: DCE-MRI parameters V
    Language English
    Publishing date 2023-07-05
    Publishing country Poland
    Document type Journal Article
    ZDB-ID 2675143-4
    ISSN 1899-0967 ; 1733-134X
    ISSN (online) 1899-0967
    ISSN 1733-134X
    DOI 10.5114/pjr.2023.130383
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  9. Article ; Online: Evolution of operating microscopes and development of 3D visualization systems for intraocular surgery.

    Srinivasan, Sathish / Tripathi, Ashok Burton / Suryakumar, Rajaraman

    Journal of cataract and refractive surgery

    2023  Volume 49, Issue 9, Page(s) 988–995

    Abstract: The recent development of high-resolution, heads-up, 3D visualization microscopy systems has provided new technical and visualization options for ophthalmic surgeons. In this review, we explore the evolution of microscope technologies, the science behind ...

    Abstract The recent development of high-resolution, heads-up, 3D visualization microscopy systems has provided new technical and visualization options for ophthalmic surgeons. In this review, we explore the evolution of microscope technologies, the science behind modern 3D visualization microscopy systems, and the practical benefits (as well as disadvantages) that these systems provide over conventional microscopes for intraocular surgical practice. Overall, modern 3D visualization systems reduce the requirements for artificial illumination and provide enhanced visualization and resolution of ocular structures, improving ergonomics, and facilitating a superior educational experience. Even when considering their disadvantages, such as those related to technical feasibility, 3D visualization systems have an overall positive benefit/risk ratio. It is hoped these systems will be adopted into routine clinical practice, pending further clinical evidence on the benefits they may provide on clinical outcomes.
    MeSH term(s) Humans ; Microscopy ; Imaging, Three-Dimensional ; Eye ; Surgery, Computer-Assisted
    Language English
    Publishing date 2023-05-05
    Publishing country United States
    Document type Review ; Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 632744-8
    ISSN 1873-4502 ; 0886-3350
    ISSN (online) 1873-4502
    ISSN 0886-3350
    DOI 10.1097/j.jcrs.0000000000001216
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  10. Article ; Online: MRI features of sinonasal tract angiofibroma/juvenile nasopharyngeal angiofibroma: Case series and systematic review.

    Baba, Akira / Kurokawa, Ryo / Kurokawa, Mariko / Srinivasan, Ashok

    Journal of neuroimaging : official journal of the American Society of Neuroimaging

    2023  Volume 33, Issue 5, Page(s) 675–687

    Abstract: Background and purpose: To comprehensively summarize the radiological characteristics of sinonasal tract angiofibroma (STA) (commonly known as juvenile nasopharyngeal angiofibroma).: Methods: Forty-four lesions from 41 cases provided by 33 study ... ...

    Abstract Background and purpose: To comprehensively summarize the radiological characteristics of sinonasal tract angiofibroma (STA) (commonly known as juvenile nasopharyngeal angiofibroma).
    Methods: Forty-four lesions from 41 cases provided by 33 study articles identified through a systematic review and 13 lesions from 13 cases from our institution associated with patients with STA who underwent MRI were included in the review study, carried out by two board-certified experienced radiologists.
    Results: The study participants were all male patients with a mean age of 15.6 years at the time of diagnosis. All of them presented with nasal cavity lesions (100%), predominantly in the nasopharynx (98.2%). The sphenopalatine foramen/pterygopalatine fossa was involved in 76.0%, and compressive shift of the posterolateral wall of the maxillary sinus was present in more than half (57.9%). T2-weighted imaging signal intensity was heterogeneous with mixed high and iso intensities as compared to skeletal muscle (100%). T1-weighted imaging showed partial high signal intensity in 61.1% of the cases. Flow void and intense enhancement were present in almost all cases. Cystic/nonenhancement changes on contrast-enhanced MRI were relatively common (40.8%). The mean apparent diffusion coefficient value (2.07 × 10
    Conclusions: We summarized the MRI findings of STA that can facilitate timely diagnosis and appropriate management.
    MeSH term(s) Humans ; Male ; Adolescent ; Angiofibroma/diagnostic imaging ; Angiofibroma/pathology ; Nasopharyngeal Neoplasms/diagnosis ; Nasopharynx/pathology ; Paranasal Sinuses/pathology ; Magnetic Resonance Imaging
    Language English
    Publishing date 2023-05-10
    Publishing country United States
    Document type Systematic Review ; Journal Article ; Review
    ZDB-ID 1071724-9
    ISSN 1552-6569 ; 1051-2284
    ISSN (online) 1552-6569
    ISSN 1051-2284
    DOI 10.1111/jon.13116
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