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  1. Article ; Online: A Rare Case of Protein-Losing Enteropathy, Alopecia, Hyperpigmentation and Dystrophy of the Nails: A Case Report.

    Vonk, Jasper / Ader, Rosalia J M / Visschedijk, Marijn C

    Inflammatory bowel diseases

    2022  Volume 28, Issue 12, Page(s) 1936–1937

    MeSH term(s) Humans ; Nails ; Protein-Losing Enteropathies/diagnosis ; Protein-Losing Enteropathies/etiology ; Hyperpigmentation/etiology ; Alopecia/etiology
    Language English
    Publishing date 2022-07-22
    Publishing country England
    Document type Case Reports ; Journal Article
    ZDB-ID 1340971-2
    ISSN 1536-4844 ; 1078-0998
    ISSN (online) 1536-4844
    ISSN 1078-0998
    DOI 10.1093/ibd/izac154
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Improved intraoperative identification of close margins in oral squamous cell carcinoma resections using a dual aperture fluorescence ratio approach: first in-human results.

    Rounds, Cody C / de Wit, Jaron G / Vonk, Jasper / Vorjohan, Jennifer / Nelson, Sophia / Trang, Allyson / Villinski, Brooke / Samkoe, Kimberley S / Brankov, Jovan G / Voskuil, Floris J / Witjes, Max J H / Tichauer, Kenneth M

    Journal of biomedical optics

    2024  Volume 29, Issue 1, Page(s) 16003

    Abstract: Significance: Surgical excision is the main treatment for solid tumors in oral squamous cell carcinomas, where wide local excision (achieving a healthy tissue margin of : Aim: No clinical methods are available to assess the complete surgical margin ... ...

    Abstract Significance: Surgical excision is the main treatment for solid tumors in oral squamous cell carcinomas, where wide local excision (achieving a healthy tissue margin of
    Aim: No clinical methods are available to assess the complete surgical margin intraoperatively while the patient is still on the operating table; and while recent intraoperative back-bench fluorescence-guided surgery approaches have shown promise for detecting "positive" inadequate margins (
    Approach: The approach was evaluated on surgical specimens from patients who were administered a tumor-specific fluorescent imaging agent (cetuximab-800CW) prior to surgery. The dAFR approach was compared directly against standard wide-field fluorescence imaging and pathology measurements of margin thickness in specimens from three patients and a total of 12 margin locations (1 positive, 5 close, and 6 clear margins).
    Results: The area under the receiver operating characteristic curve, representing the ability to detect close compared to clear margins (
    Conclusions: These results provide evidence that the dAFR approach potentially improves detection of close surgical margins.
    MeSH term(s) Humans ; Squamous Cell Carcinoma of Head and Neck/diagnostic imaging ; Squamous Cell Carcinoma of Head and Neck/surgery ; Carcinoma, Squamous Cell/diagnostic imaging ; Carcinoma, Squamous Cell/surgery ; Mouth Neoplasms/diagnostic imaging ; Mouth Neoplasms/surgery ; Margins of Excision ; Neoplasm Recurrence, Local/diagnostic imaging ; Neoplasm Recurrence, Local/pathology ; Head and Neck Neoplasms ; Retrospective Studies
    Language English
    Publishing date 2024-01-17
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, N.I.H., Extramural
    ZDB-ID 1309154-2
    ISSN 1560-2281 ; 1083-3668
    ISSN (online) 1560-2281
    ISSN 1083-3668
    DOI 10.1117/1.JBO.29.1.016003
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  3. Article ; Online: A Guideline for Clinicians Performing Clinical Studies with Fluorescence Imaging.

    Heeman, Wido / Vonk, Jasper / Ntziachristos, Vasilis / Pogue, Brian W / Dierckx, Rudi A J O / Kruijff, Schelto / van Dam, Gooitzen M

    Journal of nuclear medicine : official publication, Society of Nuclear Medicine

    2022  Volume 63, Issue 5, Page(s) 640–645

    Abstract: Fluorescence imaging is an emerging imaging technique that has shown many benefits for clinical care. Currently, the field is in rapid clinical translation, and an unprecedented number of clinical trials are performed. Clinicians are inundated with ... ...

    Abstract Fluorescence imaging is an emerging imaging technique that has shown many benefits for clinical care. Currently, the field is in rapid clinical translation, and an unprecedented number of clinical trials are performed. Clinicians are inundated with numerous opportunities and combinations of different imaging modalities. To streamline this process, a multidisciplinary approach is needed with drug discovery, software and systems engineering, and translational medicine. Here, we discuss the main constituents of a uniform fluorescence imaging protocol to match the clinical need and ensure consistent study designs and reliable data collection in clinical trials. In an era in which the potential of fluorescence imaging has become evident, consistent conduct of studies, data analysis, and data interpretation is essential for implementation into the standard of care.
    MeSH term(s) Optical Imaging
    Language English
    Publishing date 2022-02-10
    Publishing country United States
    Document type Journal Article
    ZDB-ID 80272-4
    ISSN 1535-5667 ; 0097-9058 ; 0161-5505 ; 0022-3123
    ISSN (online) 1535-5667
    ISSN 0097-9058 ; 0161-5505 ; 0022-3123
    DOI 10.2967/jnumed.121.262975
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  4. Article ; Online: Improving oral cavity cancer diagnosis and treatment with fluorescence molecular imaging.

    Vonk, Jasper / de Wit, Jaron Gérard / Voskuil, Floris Jan / Witjes, Max Johannes Hendrikus

    Oral diseases

    2020  Volume 27, Issue 1, Page(s) 21–26

    Abstract: Early diagnosis and radical surgical excision of oral squamous cell carcinomas are essential for achieving optimal treatment outcomes. To date, diagnostic tools that rely on anatomical anomalies provide limited information and resolution in clinical ... ...

    Abstract Early diagnosis and radical surgical excision of oral squamous cell carcinomas are essential for achieving optimal treatment outcomes. To date, diagnostic tools that rely on anatomical anomalies provide limited information and resolution in clinical practice. As a result, oral cancer is often detected in an advanced stage. Also, no reliable real-time intraoperative tools are readily available for the evaluation of surgical resection margins. Fluorescence imaging visualises biological processes that occur in early carcinogenesis and could, therefore, enable detection of small tumours in early stages. Furthermore, due to the high sensitivity and spatial resolution, fluorescence imaging could assist in resection margin assessment during surgery. In this review, we discuss several techniques that employ fluorescence for early diagnosis and surgical guidance in oral squamous cell carcinoma and present future perspectives on the potential of fluorescence imaging in oral cancer in the near future.
    MeSH term(s) Carcinoma, Squamous Cell/diagnostic imaging ; Carcinoma, Squamous Cell/surgery ; Head and Neck Neoplasms ; Humans ; Molecular Imaging ; Mouth Neoplasms/diagnostic imaging ; Mouth Neoplasms/surgery ; Optical Imaging
    Language English
    Publishing date 2020-03-13
    Publishing country Denmark
    Document type Journal Article ; Review
    ZDB-ID 1290529-x
    ISSN 1601-0825 ; 1354-523X
    ISSN (online) 1601-0825
    ISSN 1354-523X
    DOI 10.1111/odi.13308
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  5. Article ; Online: Towards in vivo characterization of thyroid nodules suspicious for malignancy using multispectral optoacoustic tomography.

    Noltes, Milou E / Bader, Maximilian / Metman, Madelon J H / Vonk, Jasper / Steinkamp, Pieter J / Kukačka, Jan / Westerlaan, Henriette E / Dierckx, Rudi A J O / van Hemel, Bettien M / Brouwers, Adrienne H / van Dam, Gooitzen M / Jüstel, Dominik / Ntziachristos, Vasilis / Kruijff, Schelto

    European journal of nuclear medicine and molecular imaging

    2023  Volume 50, Issue 9, Page(s) 2736–2750

    Abstract: Purpose: Patient-tailored management of thyroid nodules requires improved risk of malignancy stratification by accurate preoperative nodule assessment, aiming to personalize decisions concerning diagnostics and treatment. Here, we perform an exploratory ...

    Abstract Purpose: Patient-tailored management of thyroid nodules requires improved risk of malignancy stratification by accurate preoperative nodule assessment, aiming to personalize decisions concerning diagnostics and treatment. Here, we perform an exploratory pilot study to identify possible patterns on multispectral optoacoustic tomography (MSOT) for thyroid malignancy stratification. For the first time, we directly correlate MSOT images with histopathology data on a detailed level.
    Methods: We use recently enhanced data processing and image reconstruction methods for MSOT to provide next-level image quality by means of improved spatial resolution and spectral contrast. We examine optoacoustic features in thyroid nodules associated with vascular patterns and correlate these directly with reference histopathology.
    Results: Our methods show the ability to resolve blood vessels with diameters of 250 μm at depths of up to 2 cm. The vessel diameters derived on MSOT showed an excellent correlation (R
    Conclusion: We recommend examining optoacoustic features in addition to chromophore quantification to rank malignancy risk. We present optoacoustic images of thyroid nodules with the highest spatial resolution and spectral contrast to date, directly correlated to histopathology, pushing the clinical translation of MSOT.
    MeSH term(s) Humans ; Thyroid Nodule/diagnostic imaging ; Pilot Projects ; Photoacoustic Techniques/methods ; Tomography/methods ; Tomography, X-Ray Computed
    Language English
    Publishing date 2023-04-11
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 8236-3
    ISSN 1619-7089 ; 0340-6997 ; 1619-7070
    ISSN (online) 1619-7089
    ISSN 0340-6997 ; 1619-7070
    DOI 10.1007/s00259-023-06189-1
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  6. Article ; Online: Fluorescence molecular imaging using cetuximab-800CW in cutaneous squamous cell carcinoma surgery: a proof-of-concept study.

    Vonk, Jasper / de Wit, Jaron G / Voskuil, Floris J / Koldijk, Marjolein / Rácz, Emőke / Hooghiemstra, Wouter T R / Doff, Jan J / Diercks, Gilles F H / van Dam, Gooitzen M / Witjes, Max J H / de Visscher, Sebastiaan A H J

    The British journal of dermatology

    2022  Volume 187, Issue 5, Page(s) 810–812

    MeSH term(s) Humans ; Cetuximab ; Carcinoma, Squamous Cell/diagnostic imaging ; Carcinoma, Squamous Cell/surgery ; Carcinoma, Squamous Cell/pathology ; Skin Neoplasms/diagnostic imaging ; Skin Neoplasms/surgery ; Optical Imaging ; Molecular Imaging ; Head and Neck Neoplasms
    Chemical Substances Cetuximab (PQX0D8J21J)
    Language English
    Publishing date 2022-08-02
    Publishing country England
    Document type Letter
    ZDB-ID 80076-4
    ISSN 1365-2133 ; 0007-0963
    ISSN (online) 1365-2133
    ISSN 0007-0963
    DOI 10.1111/bjd.21722
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  7. Article: VEGF-Targeted Multispectral Optoacoustic Tomography and Fluorescence Molecular Imaging in Human Carotid Atherosclerotic Plaques.

    Steinkamp, Pieter J / Vonk, Jasper / Huisman, Lydian A / Meersma, Gert-Jan / Diercks, Gilles F H / Hillebrands, Jan-Luuk / Nagengast, Wouter B / Zeebregts, Clark J / Slart, Riemer H J A / Boersma, Hendrikus H / van Dam, Gooitzen M

    Diagnostics (Basel, Switzerland)

    2021  Volume 11, Issue 7

    Abstract: Vulnerable atherosclerotic carotid plaques are prone to rupture, resulting in ischemic strokes. In contrast to radiological imaging techniques, molecular imaging techniques have the potential to assess plaque vulnerability by visualizing diseases- ... ...

    Abstract Vulnerable atherosclerotic carotid plaques are prone to rupture, resulting in ischemic strokes. In contrast to radiological imaging techniques, molecular imaging techniques have the potential to assess plaque vulnerability by visualizing diseases-specific biomarkers. A risk factor for rupture is intra-plaque neovascularization, which is characterized by overexpression of vascular endothelial growth factor-A (VEGF-A). Here, we study if administration of bevacizumab-800CW, a near-infrared tracer targeting VEGF-A, is safe and if molecular assessment of atherosclerotic carotid plaques in vivo is possible using multispectral optoacoustic tomography (MSOT). Healthy volunteers and patients with symptomatic carotid artery stenosis scheduled for carotid artery endarterectomy were imaged with MSOT. Secondly, patients were imaged two days after intravenous administration of 4.5 bevacizumab-800CW. Ex vivo fluorescence molecular imaging of the surgically removed plaque specimen was performed and correlated with histopathology. In this first-in-human MSOT and fluorescence molecular imaging study, we show that administration of 4.5 mg bevacizumab-800CW appeared to be safe in five patients and accumulated in the carotid atherosclerotic plaque. Although we could visualize the carotid bifurcation area in all subjects using MSOT, bevacizumab-800CW-resolved signal could not be detected with MSOT in the patients. Future studies should evaluate tracer safety, higher doses of bevacizumab-800CW or develop dedicated contrast agents for carotid atherosclerotic plaque assessment using MSOT.
    Language English
    Publishing date 2021-07-07
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662336-5
    ISSN 2075-4418
    ISSN 2075-4418
    DOI 10.3390/diagnostics11071227
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  8. Article ; Online: Intraoperative imaging in pathology-assisted surgery.

    Voskuil, Floris J / Vonk, Jasper / van der Vegt, Bert / Kruijff, Schelto / Ntziachristos, Vasilis / van der Zaag, Pieter J / Witjes, Max J H / van Dam, Gooitzen M

    Nature biomedical engineering

    2021  Volume 6, Issue 5, Page(s) 503–514

    Abstract: The pathological assessment of surgical specimens during surgery can reduce the incidence of positive resection margins, which otherwise can result in additional surgeries or aggressive therapeutic regimens. To improve patient outcomes, intraoperative ... ...

    Abstract The pathological assessment of surgical specimens during surgery can reduce the incidence of positive resection margins, which otherwise can result in additional surgeries or aggressive therapeutic regimens. To improve patient outcomes, intraoperative spectroscopic, fluorescence-based, structural, optoacoustic and radiological imaging techniques are being tested on freshly excised tissue. The specific clinical setting and tumour type largely determine whether endogenous or exogenous contrast is to be detected and whether the tumour specificity of the detected biomarker, image resolution, image-acquisition times or penetration depth are to be prioritized. In this Perspective, we describe current clinical standards for intraoperative tissue analysis and discuss how intraoperative imaging is being implemented. We also discuss potential implementations of intraoperative pathology-assisted surgery for clinical decision-making.
    MeSH term(s) Fluorescence ; Humans ; Margins of Excision ; Neoplasms/diagnostic imaging ; Neoplasms/surgery ; Surgery, Computer-Assisted/methods
    Language English
    Publishing date 2021-11-08
    Publishing country England
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't
    ISSN 2157-846X
    ISSN (online) 2157-846X
    DOI 10.1038/s41551-021-00808-8
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  9. Article ; Online: EGFR-targeted fluorescence molecular imaging for intraoperative margin assessment in oral cancer patients: a phase II trial.

    de Wit, Jaron G / Vonk, Jasper / Voskuil, Floris J / de Visscher, Sebastiaan A H J / Schepman, Kees-Pieter / Hooghiemstra, Wouter T R / Linssen, Matthijs D / Elias, Sjoerd G / Halmos, Gyorgy B / Plaat, Boudewijn E C / Doff, Jan J / Rosenthal, Eben L / Robinson, Dominic / van der Vegt, Bert / Nagengast, Wouter B / van Dam, Gooitzen M / Witjes, Max J H

    Nature communications

    2023  Volume 14, Issue 1, Page(s) 4952

    Abstract: Inadequate surgical margins occur frequently in oral squamous cell carcinoma surgery. Fluorescence molecular imaging (FMI) has been explored for intraoperative margin assessment, but data are limited to phase-I studies. In this single-arm phase-II study ( ...

    Abstract Inadequate surgical margins occur frequently in oral squamous cell carcinoma surgery. Fluorescence molecular imaging (FMI) has been explored for intraoperative margin assessment, but data are limited to phase-I studies. In this single-arm phase-II study (NCT03134846), our primary endpoints were to determine the sensitivity, specificity and positive predictive value of cetuximab-800CW for tumor-positive margins detection. Secondary endpoints were safety, close margin detection rate and intrinsic cetuximab-800CW fluorescence. In 65 patients with 66 tumors, cetuximab-800CW was well-tolerated. Fluorescent spots identified in the surgical margin with signal-to-background ratios (SBR) of ≥2 identify tumor-positive margins with 100% sensitivity, 85.9% specificity, 58.3% positive predictive value, and 100% negative predictive value. An SBR of ≥1.5 identifies close margins with 70.3% sensitivity, 76.1% specificity, 60.5% positive predictive value, and 83.1% negative predictive value. Performing frozen section analysis aimed at the fluorescent spots with an SBR of ≥1.5 enables safe, intraoperative adjustment of surgical margins.
    MeSH term(s) Humans ; Carcinoma, Squamous Cell/diagnostic imaging ; Carcinoma, Squamous Cell/surgery ; Cetuximab ; Coloring Agents ; ErbB Receptors ; Margins of Excision ; Molecular Imaging ; Mouth Neoplasms/diagnostic imaging ; Mouth Neoplasms/surgery ; Radiopharmaceuticals
    Chemical Substances Cetuximab (PQX0D8J21J) ; Coloring Agents ; EGFR protein, human (EC 2.7.10.1) ; ErbB Receptors (EC 2.7.10.1) ; Radiopharmaceuticals
    Language English
    Publishing date 2023-08-16
    Publishing country England
    Document type Clinical Trial, Phase II ; Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-023-40324-8
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  10. Article ; Online: Comparison of narrow band and fluorescence molecular imaging to improve intraoperative tumour margin assessment in oral cancer surgery.

    de Wit, Jaron G / van Schaik, Jeroen E / Voskuil, Floris J / Vonk, Jasper / de Visscher, Sebastiaan A H J / Schepman, Kees-Pieter / van der Laan, Bernard F A M / Doff, Jan J / van der Vegt, Bert / Plaat, Boudewijn E C / Witjes, Max J H

    Oral oncology

    2022  Volume 134, Page(s) 106099

    Abstract: Objective: New techniques have emerged to aid in preventing inadequate margins in oral squamous cell carcinoma (OSCC) surgery, but studies comparing different techniques are lacking. Here, we compared narrow band imaging (NBI) with fluorescence ... ...

    Abstract Objective: New techniques have emerged to aid in preventing inadequate margins in oral squamous cell carcinoma (OSCC) surgery, but studies comparing different techniques are lacking. Here, we compared narrow band imaging (NBI) with fluorescence molecular imaging (FMI), to study which intraoperative technique best assesses the mucosal tumour margins.
    Materials and methods: NBI was performed in vivo and borders were marked with three sutures. For FMI, patients received 75 mg of unlabelled cetuximab followed by 15 mg cetuximab-800CW intravenously-two days prior to surgery. The FMI borders were defined on the excised specimen. The NBI borders were correlated with the FMI outline and histopathology.
    Results: Sixteen patients were included, resulting in 31 NBI and 30 FMI measurements. The mucosal border was delineated within 1 mm of the tumour border in 4/31 (13 %) of NBI and in 16/30 (53 %) FMI cases (p = 0.0008), and within 5 mm in 23/31 (74 %) of NBI and in 29/30 (97 %) of FMI cases (p = 0.0048). The median distance between the tumour border and the imaging border was significantly greater for NBI (3.2 mm, range -6.1 to 12.8 mm) than for FMI (0.9 mm, range -3.0 to 7.4 mm; p = 0.028). Submucosal extension and previous irradiation reduced NBI accuracy.
    Conclusion: Ex vivo FMI performed more accurately than in vivo NBI in mucosal margin assessment, mainly because NBI cannot detect submucosal extension. NBI adequately identified the mucosal margin especially in early-stage and not previously irradiated tumours, and may therefore be preferable in these tumours for practical and cost-related reasons.
    MeSH term(s) Carcinoma, Squamous Cell/diagnostic imaging ; Carcinoma, Squamous Cell/pathology ; Carcinoma, Squamous Cell/surgery ; Cetuximab/therapeutic use ; Head and Neck Neoplasms ; Humans ; Margins of Excision ; Molecular Imaging ; Mouth Neoplasms/diagnostic imaging ; Mouth Neoplasms/pathology ; Mouth Neoplasms/surgery ; Narrow Band Imaging ; Prospective Studies
    Chemical Substances Cetuximab (PQX0D8J21J)
    Language English
    Publishing date 2022-09-12
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1120465-5
    ISSN 1879-0593 ; 0964-1955 ; 1368-8375
    ISSN (online) 1879-0593
    ISSN 0964-1955 ; 1368-8375
    DOI 10.1016/j.oraloncology.2022.106099
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