Siert Knollema

1.4k total citations
52 papers, 1.0k citations indexed

About

Siert Knollema is a scholar working on Radiology, Nuclear Medicine and Imaging, Biomedical Engineering and Surgery. According to data from OpenAlex, Siert Knollema has authored 52 papers receiving a total of 1.0k indexed citations (citations by other indexed papers that have themselves been cited), including 39 papers in Radiology, Nuclear Medicine and Imaging, 15 papers in Biomedical Engineering and 8 papers in Surgery. Recurrent topics in Siert Knollema's work include Cardiac Imaging and Diagnostics (30 papers), Advanced MRI Techniques and Applications (18 papers) and Medical Imaging Techniques and Applications (15 papers). Siert Knollema is often cited by papers focused on Cardiac Imaging and Diagnostics (30 papers), Advanced MRI Techniques and Applications (18 papers) and Medical Imaging Techniques and Applications (15 papers). Siert Knollema collaborates with scholars based in Netherlands, United States and Germany. Siert Knollema's co-authors include Pieter L. Jager, Jan Paul Ottervanger, Mohamed Mouden, Jorik R. Timmer, Gert J. Ter Horst, Ad H. Oostdijk, Stoffer Reiffers, Jakob Korf, Cornelis H. Slump and Jorn A. van Dalen and has published in prestigious journals such as The Journal of Comparative Neurology, Stroke and Radiology.

In The Last Decade

Siert Knollema

50 papers receiving 989 citations

Peers

Siert Knollema

RNMI

CCM

CMN

SURGE

Suresh Narayanan United States

Mamoru Tamura Japan

E. Zilkha United Kingdom

Masaaki Uematsu Japan

Ruo‐Yang Shi China

Xiaobin Xie China

Tao Qin United States

Aapo Ahonen Finland

J.D. Brown Canada

Suresh Narayanan United States

Siert Knollema

482 ×0.8

RNMI

238 ×0.8

187 ×1.8

CCM

196 ×1.9

CMN

70 ×0.8

SURGE

Citations per year, relative to Siert Knollema Siert Knollema (= 1×) peers Suresh Narayanan

Countries citing papers authored by Siert Knollema

Since Specialization

Citations

This map shows the geographic impact of Siert Knollema's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Siert Knollema with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Siert Knollema more than expected).

Fields of papers citing papers by Siert Knollema

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Siert Knollema. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Siert Knollema. The network helps show where Siert Knollema may publish in the future.

Co-authorship network of co-authors of Siert Knollema

This figure shows the co-authorship network connecting the top 25 collaborators of Siert Knollema. A scholar is included among the top collaborators of Siert Knollema based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Siert Knollema. Siert Knollema is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Dijk, J.D. van, Jorik R. Timmer, Jan Paul Ottervanger, et al.. (2023). The incremental value of coronary artery calcium score in predicting long-term prognosis and defining the warranty period of normal adenosine stress-only myocardial perfusion imaging using CZT SPECT. Journal of Nuclear Cardiology. 30(6). 2692–2701. 1 indexed citations

Koopman, Daniëlle, Pieter L. Jager, Cornelis H. Slump, Siert Knollema, & Jorn A. van Dalen. (2019). SUV variability in EARL-accredited conventional and digital PET. EJNMMI Research. 9(1). 106–106. 17 indexed citations

Ottervanger, Jan Paul, et al.. (2019). Does fractional flow reserve overestimate severity of LAD lesions?. Journal of Nuclear Cardiology. 27(4). 1306–1313. 7 indexed citations

Dijk, J.D. van, J.A. van Dalen, Siert Knollema, et al.. (2018). Minimal rest activity for SPECT myocardial perfusion imaging in a one-day stress-first protocol. European Journal of Nuclear Medicine and Molecular Imaging. 46(6). 1248–1256. 1 indexed citations

Koopman, Daniëlle, et al.. (2017). Digital PET compliance to EARL accreditation specifications. EJNMMI Physics. 4(1). 9–9. 13 indexed citations

Timmer, Jorik R., et al.. (2017). Changes in cardiovascular medication after coronary artery calcium scanning and normal single photon emission computed tomography myocardial perfusion imaging in symptomatic patients. American Heart Journal. 186. 56–62. 6 indexed citations

Timmer, Jorik R., et al.. (2017). Prognostic Value of Myocardial Perfusion Imaging with a Cadmium-Zinc-Telluride SPECT Camera in Patients Suspected of Having Coronary Artery Disease. Journal of Nuclear Medicine. 58(9). 1459–1463. 22 indexed citations

Dijk, J.D. van, Jorn A. van Dalen, Mohamed Mouden, et al.. (2016). Value of automatic patient motion detection and correction in myocardial perfusion imaging using a CZT-based SPECT camera. Journal of Nuclear Cardiology. 25(2). 419–428. 10 indexed citations

Dijk, J.D. van, Mohamed Mouden, Jan Paul Ottervanger, et al.. (2016). Value of attenuation correction in stress-only myocardial perfusion imaging using CZT-SPECT. Journal of Nuclear Cardiology. 24(2). 395–401. 27 indexed citations

10.

Timmer, Jorik R., Mohamed Mouden, P.L. Jager, et al.. (2016). Visual estimation of coronary calcium on computed tomography for attenuation correction. Journal of cardiovascular computed tomography. 10(4). 327–329. 13 indexed citations

11.

Timmer, Jorik R., et al.. (2016). Impact of Gender on the Prognostic Value of Coronary Artery Calcium in Symptomatic Patients With Normal Single-Photon Emission Computed Tomography Myocardial Perfusion. The American Journal of Cardiology. 118(11). 1611–1615. 3 indexed citations

12.

Dijk, J.D. van, Piet L. Jager, Jan Paul Ottervanger, et al.. (2015). A practical approach for a patient-tailored dose protocol in coronary CT angiography using prospective ECG triggering. International journal of cardiac imaging. 32(3). 531–538. 1 indexed citations

13.

Timmer, Jorik R., Jan Paul Ottervanger, Mohamed Mouden, et al.. (2015). Sequential SPECT/CT imaging for detection of coronary artery disease in a large cohort: evaluation of the need for additional imaging and radiation exposure. Journal of Nuclear Cardiology. 24(1). 212–223. 5 indexed citations

14.

Koopman, Daniëlle, Jorn A. van Dalen, Jos A. Stigt, et al.. (2015). Current generation time-of-flight 18F-FDG PET/CT provides higher SUVs for normal adrenal glands, while maintaining an accurate characterization of benign and malignant glands. Annals of Nuclear Medicine. 30(2). 145–152. 8 indexed citations

15.

Dijk, J.D. van, P.L. Jager, J. P. Ottervanger, et al.. (2015). Patient-specific tracer activity in MPI SPECT: A hands-on approach. Journal of Nuclear Cardiology. 23(1). 145–148. 6 indexed citations

16.

Dijk, J.D. van, P.L. Jager, J. P. Ottervanger, et al.. (2015). Development and validation of a patient-tailored dose regime in myocardial perfusion imaging using conventional SPECT. Journal of Nuclear Cardiology. 23(1). 134–142. 23 indexed citations

17.

Mouden, Mohamed, Jorik R. Timmer, Jan Paul Ottervanger, et al.. (2012). Impact of a new ultrafast CZT SPECT camera for myocardial perfusion imaging: fewer equivocal results and lower radiation dose. European Journal of Nuclear Medicine and Molecular Imaging. 39(6). 1048–1055. 75 indexed citations

18.

Knollema, Siert, D.A. Piers, Christophe Van de Wiele, et al.. (1998). Cobalt-57 as a SPET tracer in the visualization of ischaemic brain damage in patients with middle cerebral artery stroke. Nuclear Medicine Communications. 19(6). 573–580. 5 indexed citations

19.

Wiersma, Andrew T., Siert Knollema, Jan Pieter Konsman, B. Bohus, & J.M. Koolhaas. (1997). Corticotropin-Releasing Hormone Modulation of a Conditioned Stress Response in the Central Amygdala of Roman High (RHA/Verh)-Avoidance and Low (RLA/Verh)-Avoidance Rats. Behavior Genetics. 27(6). 547–555. 15 indexed citations

20.

Knollema, Siert, et al.. (1996). Microglia/astrocyte interactions in relation to development of damage after transient hypoxia/ischemia.. Data Archiving and Networked Services (DANS). 1 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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