LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 36

Search options

  1. Article ; Online: Small-voxel reconstructions significantly influence SUVs in PET imaging.

    Koopman, Daniëlle / Jager, Pieter L / van Dalen, Jorn A

    European journal of nuclear medicine and molecular imaging

    2019  Volume 46, Issue 8, Page(s) 1751–1752

    MeSH term(s) Fluorodeoxyglucose F18 ; Positron Emission Tomography Computed Tomography ; Positron-Emission Tomography
    Chemical Substances Fluorodeoxyglucose F18 (0Z5B2CJX4D)
    Language English
    Publishing date 2019-03-13
    Publishing country Germany
    Document type Letter ; Comment
    ZDB-ID 8236-3
    ISSN 1619-7089 ; 0340-6997 ; 1619-7070
    ISSN (online) 1619-7089
    ISSN 0340-6997 ; 1619-7070
    DOI 10.1007/s00259-019-04301-y
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Performance of digital PET/CT compared with conventional PET/CT in oncologic patients: a prospective comparison study.

    de Jong, Tonke L / Koopman, Daniëlle / van Dalen, Jorn A / Tegelaar, Aline / van Dijk, Joris D / Stevens, Henk / Jager, Pieter L

    Annals of nuclear medicine

    2022  Volume 36, Issue 8, Page(s) 756–764

    Abstract: Purpose: Digital PET systems (dPET) improve lesion detectability as compared to PET systems with conventional photomultiplier tubes (cPET). We prospectively studied the performance of high-resolution digital PET scans in patients with cancer, as ... ...

    Abstract Purpose: Digital PET systems (dPET) improve lesion detectability as compared to PET systems with conventional photomultiplier tubes (cPET). We prospectively studied the performance of high-resolution digital PET scans in patients with cancer, as compared with high- and standard-resolution conventional PET scans, taking the acquisition order into account.
    Methods: We included 212 patients with cancer, who were referred for disease staging or restaging. All patients underwent FDG-PET/CT on a dPET scanner and on a cPET scanner in a randomized order. The scans were acquired immediately after each other. Three image reconstructions were generated: 1) standard-resolution (4 × 4 × 4 mm
    Results: On high-resolution dPET, the PET readers detected more lesions or they had a higher diagnostic confidence than on high- and standard-resolution cPET (p < 0.001). High-resolution dPET was preferred in 90% of the cases, as compared to 44% for high-resolution cPET and 1% for standard-resolution cPET (p < 0.001). However, for the subgroup of patients where dPET was made first (n = 103, 61 ± 10 min after FDG administration) and cPET was made second (93 ± 15 min after FDG administration), no significant difference in preference was found between the high-resolution cPET and dPET reconstructions (p = 0.41).
    Conclusions: DPET scanners in combination with high-resolution reconstructions clinically outperform cPET scanners with both high- and standard-resolution reconstructions as the PET readers identified more FDG-avid lesions, their diagnostic confidence was increased, and they visually preferred dPET. However, when dPET was made first, high-resolution dPET and high-resolution cPET showed similar performance, indicating the positive effect of a prolonged FDG uptake time. Therefore, high-resolution cPET in combination with a prolonged FDG uptake time can be considered as an alternative.
    MeSH term(s) Fluorodeoxyglucose F18 ; Humans ; Image Processing, Computer-Assisted ; Neoplasms/diagnostic imaging ; Positron Emission Tomography Computed Tomography/methods ; Positron-Emission Tomography/methods
    Chemical Substances Fluorodeoxyglucose F18 (0Z5B2CJX4D)
    Language English
    Publishing date 2022-06-21
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 1146984-5
    ISSN 1864-6433 ; 0914-7187
    ISSN (online) 1864-6433
    ISSN 0914-7187
    DOI 10.1007/s12149-022-01758-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Adverse Events of Diagnostic Radiopharmaceuticals: A Systematic Review.

    Schreuder, Nanno / Koopman, Daniëlle / Jager, Pieter L / Kosterink, Jos G W / van Puijenbroek, Eugène

    Seminars in nuclear medicine

    2019  Volume 49, Issue 5, Page(s) 382–410

    Abstract: Diagnostic radiopharmaceuticals used in nuclear medicine can cause adverse events. Information on these adverse events is available in case reports and databases but may not be readily accessible to healthcare professionals. This systematic review ... ...

    Abstract Diagnostic radiopharmaceuticals used in nuclear medicine can cause adverse events. Information on these adverse events is available in case reports and databases but may not be readily accessible to healthcare professionals. This systematic review provides an overview of adverse events of diagnostical radiopharmaceuticals and their characteristics. A median frequency for adverse events in diagnostical radiopharmaceuticals of 1.63 (interquartile range: 1.09-2.29) per 100,000 is reported. Most common are skin and subcutaneous tissue disorders, and general disorders and administration site conditions. Many adverse events reported are minor in severity, although 6.7% can be classified as important. In rare cases, adverse events are serious and potentially life-threatening. With the introduction of new radiopharmaceuticals and the increasing use of positron emission tomography-computed tomography, previously unknown adverse events may be detected in daily practice. Future work should cover the experience of the patient with adverse events from diagnostic radiopharmaceuticals.
    MeSH term(s) Diagnostic Techniques and Procedures/adverse effects ; Humans ; Quality Control ; Radiopharmaceuticals/adverse effects
    Chemical Substances Radiopharmaceuticals
    Language English
    Publishing date 2019-06-19
    Publishing country United States
    Document type Journal Article ; Systematic Review
    ZDB-ID 120248-0
    ISSN 1558-4623 ; 0001-2998
    ISSN (online) 1558-4623
    ISSN 0001-2998
    DOI 10.1053/j.semnuclmed.2019.06.006
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article: SUV variability in EARL-accredited conventional and digital PET.

    Koopman, Daniëlle / Jager, Pieter L / Slump, Cornelis H / Knollema, Siert / van Dalen, Jorn A

    EJNMMI research

    2019  Volume 9, Issue 1, Page(s) 106

    Abstract: Background: A high SUV-reproducibility is crucial when different PET scanners are in use. We evaluated the SUV variability in whole-body FDG-PET scans of patients with suspected or proven cancer using an EARL-accredited conventional and digital PET ... ...

    Abstract Background: A high SUV-reproducibility is crucial when different PET scanners are in use. We evaluated the SUV variability in whole-body FDG-PET scans of patients with suspected or proven cancer using an EARL-accredited conventional and digital PET scanner. In a head-to-head comparison we studied images of 50 patients acquired on a conventional scanner (cPET, Ingenuity TF PET/CT, Philips) and compared them with images acquired on a digital scanner (dPET, Vereos PET/CT, Philips). The PET scanning order was randomised and EARL-compatible reconstructions were applied. We measured SUV
    Results: We included 128 lesions with an average size of 19 ± 14 mm. Average ΔSUVs were 6-8% with dPET values being higher for all three SUV-parameters (p < 0.001). ΔSUV
    Conclusions: With EARL-accredited conventional and digital PET, we found a limited SUV variability with average differences up to 8%. Furthermore, only a limited number of lesions showed a SUV difference of more than 30%. These findings indicate that EARL standardisation works.
    Trial registration: This prospective study was registered on the 31th of October 2017 at ClinicalTrials.cov. URL: https://clinicaltrials.gov/ct2/show/NCT03457506?id=03457506&rank=1.
    Language English
    Publishing date 2019-12-10
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2619892-7
    ISSN 2191-219X
    ISSN 2191-219X
    DOI 10.1186/s13550-019-0569-7
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Added value of digital FDG-PET/CT in disease staging and restaging in patients with resectable or borderline resectable pancreatic cancer.

    de Jong, Tonke L / Koopman, Daniëlle / van der Worp, Corné A J / Stevens, Henk / Vuijk, Floris A / Vahrmeijer, Alexander L / Mieog, J Sven D / de Groot, Jan-Willem B / Meijssen, Maarten A C / Nieuwenhuijs, Vincent B / Lioe-Fee, de Geus-Oei / Jager, Pieter L / Patijn, Gijs A

    Surgical oncology

    2023  Volume 47, Page(s) 101909

    Abstract: Background: We studied the added value of digital FDG-PET/CT in disease staging and restaging compared to the standard work-up with contrast enhanced CT (ceCT) and CA19-9 in patients with resectable or borderline resectable pancreatic cancer who ... ...

    Abstract Background: We studied the added value of digital FDG-PET/CT in disease staging and restaging compared to the standard work-up with contrast enhanced CT (ceCT) and CA19-9 in patients with resectable or borderline resectable pancreatic cancer who received neo-adjuvant therapy. Primary endpoints were tumor response compared to ceCT and CA19.9 as well as the ability to detect distant metastatic disease.
    Methods: 35 patients were included in this dual-center prospective study. FDG-PET using digital photon counting technology combined with CT scans were acquired before (T
    Results: CA19-9 levels, CT tumor diameter, and tumor FDG-uptake on PET significantly decreased from T
    Conclusion: We found that adding digital PET/CT strengthens restaging after neo-adjuvant therapy based on the observed strong correlation with ceCT tumor diameter and Ca19.9. Also, digital PET/CT was found to detect occult metastatic disease not visualized on ceCT, that would have resulted in altered disease staging and therapeutic strategy in a substantial proportion of patients.
    MeSH term(s) Humans ; Positron Emission Tomography Computed Tomography/methods ; Fluorodeoxyglucose F18 ; CA-19-9 Antigen/therapeutic use ; Retrospective Studies ; Prospective Studies ; Positron-Emission Tomography/methods ; Pancreatic Neoplasms/diagnostic imaging ; Pancreatic Neoplasms/surgery ; Pancreatic Neoplasms/drug therapy ; Neoplasm Staging ; Radiopharmaceuticals/therapeutic use ; Pancreatic Neoplasms
    Chemical Substances Fluorodeoxyglucose F18 (0Z5B2CJX4D) ; CA-19-9 Antigen ; Radiopharmaceuticals
    Language English
    Publishing date 2023-02-01
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1107810-8
    ISSN 1879-3320 ; 0960-7404
    ISSN (online) 1879-3320
    ISSN 0960-7404
    DOI 10.1016/j.suronc.2023.101909
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: Significant pain decrease in children with non-systemic Juvenile Idiopathic Arthritis treated to target: results over 24 months of follow up.

    Spekking, Katinka / Anink, Janneke / de Boer, Piroska / Bergstra, Sytske Anne / van den Berg, J Merlijn / Schonenberg-Meinema, Dieneke / van Suijlekom-Smit, Lisette W A / van Rossum, Marion A J / Koopman-Keemink, Yvonne / Cate, Rebecca Ten / Allaart, Cornelia F / Brinkman, Daniëlle M C / Muller, Petra C E Hissink

    Pediatric rheumatology online journal

    2023  Volume 21, Issue 1, Page(s) 90

    Abstract: Background: The aim of this study was to compare pain-scores in three targeted treatment-strategies in JIA-patients and to identify characteristics predicting persistent pain.: Methods: In the BeSt-for-Kids-study 92 DMARD-naïve JIA-patients were ... ...

    Abstract Background: The aim of this study was to compare pain-scores in three targeted treatment-strategies in JIA-patients and to identify characteristics predicting persistent pain.
    Methods: In the BeSt-for-Kids-study 92 DMARD-naïve JIA-patients were randomized in 3 treatment-strategies: 1) initial sequential DMARD-monotherapy 2) initial methotrexate (MTX)/prednisolone-bridging or 3) initial MTX/etanercept. Potential differences in VAS pain scores (0-100 mm) over time between treatment-strategies were compared using linear mixed models with visits clustered within patients. A multivariable model was used to assess the ability of baseline characteristics to predict the chance of high pain-scores during follow-up.
    Results: Pain-scores over time reduced from mean 55.3 (SD 21.7) to 19.5 (SD 25.3) mm after 24 months. On average, pain-scores decreased significantly with β -1.37 mm (95% CI -1.726; -1.022) per month. No significant difference was found between treatment-strategies (interaction term treatment arm*time (months) β (95% CI) arm 1: 0.13 (-0.36; 0.62) and arm 2: 0.37 (-0.12; 0.86) compared to arm 3). Correction for sex and symptom duration yielded similar results. Several baseline characteristics were predictive for pain over time. Higher VAS pain [β 0.44 (95% CI 0.25; 0.65)] and higher active joint count [0.77 (0.19; 1.34)] were predictive of higher pain over time, whereas, low VAS physician [ -0.34 (-0.55; -0.06)], CHQ Physical [ -0.42 (-0.72; -0.11)] and Psychosocial summary Score [ -0.42 (-0.77; -0.06)] were predictive of lower pain.
    Conclusions: Treatment-to-target seems effective in pain-reduction in non-systemic JIA-patients irrespective of initial treatment-strategy. Several baseline-predictors for pain over time were found, which could help to identify patients with a high risk for development of chronic pain.
    Trial registration: Dutch Trial Registry number 1574.
    MeSH term(s) Humans ; Child ; Follow-Up Studies ; Arthritis, Juvenile/complications ; Arthritis, Juvenile/drug therapy ; Chronic Pain ; Antirheumatic Agents/therapeutic use ; Etanercept
    Chemical Substances Antirheumatic Agents ; Etanercept (OP401G7OJC)
    Language English
    Publishing date 2023-08-26
    Publishing country England
    Document type Randomized Controlled Trial ; Journal Article
    ZDB-ID 2279468-2
    ISSN 1546-0096 ; 1546-0096
    ISSN (online) 1546-0096
    ISSN 1546-0096
    DOI 10.1186/s12969-023-00874-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: Patterns of clinical joint inflammation in juvenile idiopathic arthritis.

    Heckert, Sascha L / Hissink-Muller, Petra C E / van den Berg, J Merlijn / Schonenberg-Meinema, Dieneke / van Suijlekom-Smit, Lisette W A / van Rossum, Marion A J / Koopman, Yvonne / Ten Cate, Rebecca / Brinkman, Danielle M C / Huizinga, Tom W J / Allaart, Cornelia F / Bergstra, Sytske Anne

    RMD open

    2023  Volume 9, Issue 1

    Abstract: Objectives: We studied patterns of joint inflammation in juvenile idiopathic arthritis (JIA) to assess whether joint activity recurs locally in the same joints.: Methods: Joints of 91 patients of the BeSt for Kids study, a treat-to-target trial for ... ...

    Abstract Objectives: We studied patterns of joint inflammation in juvenile idiopathic arthritis (JIA) to assess whether joint activity recurs locally in the same joints.
    Methods: Joints of 91 patients of the BeSt for Kids study, a treat-to-target trial for children with recent-onset oligoarticular, rheumatoid factor-negative polyarticular and psoriatic JIA, were clinically assessed during 2 years (10 study visits). The association between joint inflammation at baseline and later inflammation in the same joint was assessed using a multilevel mixed-effects logistic regression model at joint level. With a Poisson model, the association between baseline joint inflammation and the number of study visits at which the same joint was recurrently inflamed was tested.
    Results: Of the 6097 joints studied, 15% (897) was clinically inflamed at baseline. In 42% (377/897) of those joints, inflammation recurred during follow-up. Joint inflammation at baseline was statistically significantly associated with joint inflammation during follow-up in the same joint (OR 3.9, 95% CI 3.5 to 4.4) and specifically with the number of episodes of recurrent joint inflammation (IRR 1.6, 95% CI 1.2 to 2.1).
    Conclusion: In JIA, joint inflammation has the tendency to recur multiple times in joints that are clinically inflamed at disease onset. This indicates that local factors might play a role in the processes contributing to the occurrence of JIA flares.
    MeSH term(s) Child ; Humans ; Arthritis, Juvenile/complications ; Arthritis, Juvenile/epidemiology ; Inflammation
    Language English
    Publishing date 2023-03-16
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2812592-7
    ISSN 2056-5933 ; 2056-5933
    ISSN (online) 2056-5933
    ISSN 2056-5933
    DOI 10.1136/rmdopen-2022-002941
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: SUV variability in EARL-accredited conventional and digital PET

    Daniëlle Koopman / Pieter L. Jager / Cornelis H. Slump / Siert Knollema / Jorn A. van Dalen

    EJNMMI Research, Vol 9, Iss 1, Pp 1-

    2019  Volume 8

    Abstract: Abstract Background A high SUV-reproducibility is crucial when different PET scanners are in use. We evaluated the SUV variability in whole-body FDG-PET scans of patients with suspected or proven cancer using an EARL-accredited conventional and digital ... ...

    Abstract Abstract Background A high SUV-reproducibility is crucial when different PET scanners are in use. We evaluated the SUV variability in whole-body FDG-PET scans of patients with suspected or proven cancer using an EARL-accredited conventional and digital PET scanner. In a head-to-head comparison we studied images of 50 patients acquired on a conventional scanner (cPET, Ingenuity TF PET/CT, Philips) and compared them with images acquired on a digital scanner (dPET, Vereos PET/CT, Philips). The PET scanning order was randomised and EARL-compatible reconstructions were applied. We measured SUVmean, SUVpeak, SUVmax and lesion diameter in up to 5 FDG-positive lesions per patient. The relative difference ΔSUV between cPET and dPET was calculated for each SUV-parameter. Furthermore, we calculated repeatability coefficients, reflecting the 95% confidence interval of ΔSUV. Results We included 128 lesions with an average size of 19 ± 14 mm. Average ΔSUVs were 6-8% with dPET values being higher for all three SUV-parameters (p < 0.001). ΔSUVmax was significantly higher than ΔSUVmean (8% vs. 6%, p = 0.002) and than ΔSUVpeak (8% vs. 7%, p = 0.03). Repeatability coefficients across individual lesions were 27% (ΔSUVmean and ΔSUVpeak) and 33% (ΔSUVmax) (p < 0.001). Conclusions With EARL-accredited conventional and digital PET, we found a limited SUV variability with average differences up to 8%. Furthermore, only a limited number of lesions showed a SUV difference of more than 30%. These findings indicate that EARL standardisation works. Trial registration This prospective study was registered on the 31th of October 2017 at ClinicalTrials.cov. URL: https://clinicaltrials.gov/ct2/show/NCT03457506?id=03457506&rank=1.
    Keywords FDG-PET ; EARL-accreditation ; Conventional PET ; Digital PET ; Cancer ; Medical physics. Medical radiology. Nuclear medicine ; R895-920
    Subject code 610
    Language English
    Publishing date 2019-12-01T00:00:00Z
    Publisher SpringerOpen
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  9. Article ; Online: Performance of Digital PET Compared with High-Resolution Conventional PET in Patients with Cancer.

    Koopman, Daniëlle / van Dalen, Jorn A / Stevens, Henk / Slump, Cornelis H / Knollema, Siert / Jager, Pieter L

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

    2020  Volume 61, Issue 10, Page(s) 1448–1454

    Abstract: Recently introduced PET systems using silicon photomultipliers with digital readout (dPET) have an improved timing and spatial resolution, aiming at a better image quality than conventional PET (cPET) systems. We prospectively evaluated the performance ... ...

    Abstract Recently introduced PET systems using silicon photomultipliers with digital readout (dPET) have an improved timing and spatial resolution, aiming at a better image quality than conventional PET (cPET) systems. We prospectively evaluated the performance of a dPET system in patients with cancer, as compared with high-resolution (HR) cPET imaging.
    MeSH term(s) Adult ; Aged ; Aged, 80 and over ; Female ; Fluorodeoxyglucose F18 ; Humans ; Male ; Middle Aged ; Neoplasm Staging ; Neoplasms/diagnostic imaging ; Neoplasms/pathology ; Positron-Emission Tomography/methods ; Prospective Studies
    Chemical Substances Fluorodeoxyglucose F18 (0Z5B2CJX4D)
    Language English
    Publishing date 2020-02-14
    Publishing country United States
    Document type Comparative Study ; 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.119.238105
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article: Mismatch Repair Status in Patient-Derived Colorectal Cancer Organoids Does Not Affect Intrinsic Tumor Cell Sensitivity to Systemic Therapy.

    Küçükköse, Emre / Wensink, G Emerens / Roelse, Celine M / van Schelven, Susanne J / Raats, Daniëlle A E / Boj, Sylvia F / Koopman, Miriam / Laoukili, Jamila / Roodhart, Jeanine M L / Kranenburg, Onno

    Cancers

    2021  Volume 13, Issue 21

    Abstract: DNA mismatch repair deficiency (dMMR) in metastatic colorectal cancer (mCRC) is associated with poor survival and a poor response to systemic treatment. However, it is unclear whether dMMR results in a tumor cell-intrinsic state of treatment resistance, ... ...

    Abstract DNA mismatch repair deficiency (dMMR) in metastatic colorectal cancer (mCRC) is associated with poor survival and a poor response to systemic treatment. However, it is unclear whether dMMR results in a tumor cell-intrinsic state of treatment resistance, or whether alternative mechanisms play a role. To address this, we generated a cohort of MMR-proficient and -deficient Patient-Derived Organoids (PDOs) and tested their response to commonly used drugs in the treatment of mCRC, including 5-fluorouracil (5-FU), oxaliplatin, SN-38, binimetinib, encorafenib, and cetuximab. MMR status did not correlate with the response of PDOs to any of the drugs tested. In contrast, the presence of activating mutations in the
    Language English
    Publishing date 2021-10-29
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2527080-1
    ISSN 2072-6694
    ISSN 2072-6694
    DOI 10.3390/cancers13215434
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top