Top 100 Scientists

World Top 100 Scientists 2025

Top 100 scientists can be ranked globally or specific to the following regions including Africa, Asia, Europe, North America, Latin America, Oceania, Arab League, ASEAN, EECA, and BRICS based on total H-index scores without any breakdown by subject areas. Top 100 rankings in the world, in a continent, or a region include standardized subjects areas of Agriculture & Forestry, Arts, Design and Architecture, Business & Management, Economics & Econometrics, Education, Engineering & Technology, History, Philosophy, Theology, Law/Law and Legal Studies, Medical and Health Sciences, Natural Sciences, Social Sciences, Art and Humanities Rankings and Social Sciences and Humanities Rankings BETA VERSION. Subject field ranking in world, region, country and university is beta version since subject field "others" (873,864 scientists profile whose branch cannot be determined, not yet edited or determined) is excluded, so the ranking will change as the others fields are edited. Please note that. Subjects indicated as “ * others ” will not be included in the ranking by regions and subjects.

* Rankings
Ranking Based On Selection :1
R Todd Constable
neuroscience - functional connectivity - cognitive neuroscience - brain organization - brain/behavior - MR physics
Metrics
H-Index
i10 Index
Citation
130
378
59,405
* Rankings
Ranking Based On Selection :2
Douglas L Rothman
magnetic resonance spectroscopy
neurovascular coupling
glycogen
neuroenergetics
brain metabolism
Metrics
H-Index
i10 Index
Citation
122
375
61,450
* Rankings
Ranking Based On Selection :3
Richard E Carson
PET Imaging
tracer kinetic modeling
image reconstruction
Metrics
H-Index
i10 Index
Citation
101
399
44,991
* Rankings
Ranking Based On Selection :4
Jeffrey Weinreb
MRI
Radiology
Prostate
contrast agents
MRI safety
Metrics
H-Index
i10 Index
Citation
79
201
26,100
Fahmeed Hyder
functional brain imaging
molecular imaging of cancer
brain energy metabolism
contrast agent
Metrics
H-Index
i10 Index
Citation
76
201
21,643
Yiyun Henry Huang
PET chemistry
PET radiotracer development
PET imaging
Metrics
H-Index
i10 Index
Citation
71
231
20,538
Lawrence Staib
Biomedical image analysis
Medical image analysis
Medical image computing
Metrics
H-Index
i10 Index
Citation
70
174
28,349
* Rankings
Ranking Based On Selection :10
Howard Forman
Health Policy
Radiology
Health Services
Education
Metrics
H-Index
i10 Index
Citation
46
128
8,420
* Rankings
Ranking Based On Selection :12
Evan Morris
Imaging
Addiction
Cancer
Kinetic Modeling
Visualization
Metrics
H-Index
i10 Index
Citation
41
85
7,585
* Rankings
Ranking Based On Selection :13
Michelle Hampson
real-time fMRI
neurofeedback
resting state functional connectivity
Metrics
H-Index
i10 Index
Citation
39
51
11,635
* Rankings
Ranking Based On Selection :14
David Matuskey
PET imaging
psychiatry
neuropsychiatry
social neuroscience
addiction
Metrics
H-Index
i10 Index
Citation
36
73
4,374
* Rankings
Ranking Based On Selection :15
Xilin Shen
Neuroimaging
fMRI
Image processing
Singal processing
Metrics
H-Index
i10 Index
Citation
31
38
9,888
* Rankings
Ranking Based On Selection :17
Ming Kai Chen
Nuclear Medicine
Molecular Imaging
Neuroscience
Alzheimer's disease
Metrics
H-Index
i10 Index
Citation
29
46
4,307
Takuya Toyonaga
radiology
PET
neurology
positron emission tomography
imaging
Metrics
H-Index
i10 Index
Citation
24
43
2,211
Zhengxin Jason Cai
PET Imaging probe
Pharmacology
Medicinal Chemistry
Radiopharmaceutical Sciences
Metrics
H-Index
i10 Index
Citation
24
42
1,589
Keunpoong Lim
Positron Emission Tomography
Cancer
CNS disorder
Radiochemistry
Metrics
H-Index
i10 Index
Citation
22
28
2,280
Zhiying Zhao
real-time neurofeedback
emotion regulation
addiction
resting state fmri
Metrics
H-Index
i10 Index
Citation
19
20
1,099
Margarita Revzin
diagnostic radiology
ultrasound
emergency medicine
Metrics
H-Index
i10 Index
Citation
17
27
1,275
Sophie Chheang
interventional radiology
artificial intelligence
data science
Metrics
H-Index
i10 Index
Citation
10
11
1,261
John J Hufnagle, Iv
Radiology
Interventional Radiology
Neuroradiology
Medicine
Metrics
H-Index
i10 Index
Citation
4
1
45
Rankings
Ranking Based On Selection: 1
R Todd Constable
Metrics
H-Index
i10 Index
Citation Counts
130
378
59,405
neuroscience - functional connectivity - cognitive neuroscience - brain organization - brain/behavior - MR physics
Rankings
Ranking Based On Selection: 2
Douglas L Rothman
Metrics
H-Index
i10 Index
Citation Counts
122
375
61,450
magnetic resonance spectroscopy
neurovascular coupling
glycogen
neuroenergetics
brain metabolism
Rankings
Ranking Based On Selection: 3
Richard E Carson
Metrics
H-Index
i10 Index
Citation Counts
101
399
44,991
PET Imaging
tracer kinetic modeling
image reconstruction
Rankings
Ranking Based On Selection: 4
Jeffrey Weinreb
Metrics
H-Index
i10 Index
Citation Counts
79
201
26,100
MRI
Radiology
Prostate
contrast agents
MRI safety
Rankings
Ranking Based On Selection: 5
Fahmeed Hyder
Metrics
H-Index
i10 Index
Citation Counts
76
201
21,643
functional brain imaging
molecular imaging of cancer
brain energy metabolism
contrast agent
Rankings
Ranking Based On Selection: 6
Yiyun Henry Huang
Metrics
H-Index
i10 Index
Citation Counts
71
231
20,538
PET chemistry
PET radiotracer development
PET imaging
Rankings
Ranking Based On Selection: 7
Lawrence Staib
Metrics
H-Index
i10 Index
Citation Counts
70
174
28,349
Biomedical image analysis
Medical image analysis
Medical image computing
Rankings
Ranking Based On Selection: 8
Robin A De Graaf
Metrics
H-Index
i10 Index
Citation Counts
62
150
14,834
Rankings
Ranking Based On Selection: 9
Richard Bronen
Metrics
H-Index
i10 Index
Citation Counts
50
75
16,741
Rankings
Ranking Based On Selection: 10
Howard Forman
Metrics
H-Index
i10 Index
Citation Counts
46
128
8,420
Health Policy
Radiology
Health Services
Education
Rankings
Ranking Based On Selection: 11
S Payabvash
Metrics
H-Index
i10 Index
Citation Counts
41
100
4,938
Rankings
Ranking Based On Selection: 12
Evan Morris
Metrics
H-Index
i10 Index
Citation Counts
41
85
7,585
Imaging
Addiction
Cancer
Kinetic Modeling
Visualization
Rankings
Ranking Based On Selection: 13
Michelle Hampson
Metrics
H-Index
i10 Index
Citation Counts
39
51
11,635
real-time fMRI
neurofeedback
resting state functional connectivity
Rankings
Ranking Based On Selection: 14
David Matuskey
Metrics
H-Index
i10 Index
Citation Counts
36
73
4,374
PET imaging
psychiatry
neuropsychiatry
social neuroscience
addiction
Rankings
Ranking Based On Selection: 15
Xilin Shen
Metrics
H-Index
i10 Index
Citation Counts
31
38
9,888
Neuroimaging
fMRI
Image processing
Singal processing
Rankings
Ranking Based On Selection: 16
Ajay Malhotra
Metrics
H-Index
i10 Index
Citation Counts
31
95
4,224
Rankings
Ranking Based On Selection: 17
Ming Kai Chen
Metrics
H-Index
i10 Index
Citation Counts
29
46
4,307
Nuclear Medicine
Molecular Imaging
Neuroscience
Alzheimer's disease
Rankings
Ranking Based On Selection: 18
Nicha C Dvornek
Metrics
H-Index
i10 Index
Citation Counts
25
39
3,747
Rankings
Ranking Based On Selection: 19
Takuya Toyonaga
Metrics
H-Index
i10 Index
Citation Counts
24
43
2,211
radiology
PET
neurology
positron emission tomography
imaging
Rankings
Ranking Based On Selection: 20
Zhengxin Jason Cai
Metrics
H-Index
i10 Index
Citation Counts
24
42
1,589
PET Imaging probe
Pharmacology
Medicinal Chemistry
Radiopharmaceutical Sciences
Rankings
Ranking Based On Selection: 21
Keunpoong Lim
Metrics
H-Index
i10 Index
Citation Counts
22
28
2,280
Positron Emission Tomography
Cancer
CNS disorder
Radiochemistry
Rankings
Ranking Based On Selection: 22
Zhiying Zhao
Metrics
H-Index
i10 Index
Citation Counts
19
20
1,099
real-time neurofeedback
emotion regulation
addiction
resting state fmri
Rankings
Ranking Based On Selection: 23
Margarita Revzin
Metrics
H-Index
i10 Index
Citation Counts
17
27
1,275
diagnostic radiology
ultrasound
emergency medicine
Rankings
Ranking Based On Selection: 24
Kevin M Johnson
Metrics
H-Index
i10 Index
Citation Counts
17
17
1,405
Rankings
Ranking Based On Selection: 25
Sophie Chheang
Metrics
H-Index
i10 Index
Citation Counts
10
11
1,261
interventional radiology
artificial intelligence
data science
Rankings
Ranking Based On Selection: 26
Irene Dixe De Oliveira Santo
Metrics
H-Index
i10 Index
Citation Counts
5
4
140
Rankings
Ranking Based On Selection: 27
John J Hufnagle, Iv
Metrics
H-Index
i10 Index
Citation Counts
4
1
45
Radiology
Interventional Radiology
Neuroradiology
Medicine
Rankings
Ranking Based On Selection: 28
Edi Kapetanovic
Metrics
H-Index
i10 Index
Citation Counts
3
3
1,359
Rankings
Ranking Based On Selection: 29
Douglas Silin
Metrics
H-Index
i10 Index
Citation Counts
1
0
4