The "AD Scientific Index" analyses the academic work of scientists using the H-index, i10 index and number of citations, and provides results that can be used to evaluate the productivity and efficiency of individuals and institutions. In addition to ranking according to "total H-index" for individuals and institutions, you can also see the ranking and analyses according to "last 6 years H-index"and Subject Rankings.
![Ara Darzi](/user/assets/images/profile/no-profile-photo.png)
Surgery
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
160
99
0.619
![Paris Tekkis](https://cdn.adscientificindex.com/pictures/d0/1214740.jpg)
Colorectal cancer
Anal Cancer
Inflammatory bowel disease
Diverticular disease
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
115
65
0.565
![George B Hanna](/user/assets/images/profile/no-profile-photo.png)
Surgery
Laparoscopic surgery
oesophago-gastric cancer
volatile organic compounds
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
82
58
0.707
![Sheraz Markar](/user/assets/images/profile/no-profile-photo.png)
Surgery
Cancer
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
72
55
0.764
![Hutan Ashrafian](https://cdn.adscientificindex.com/pictures/21/1604449.jpg)
surgery
obesity
artificial intelligence
philosophy
diabetes
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
70
57
0.814
![Sanjay Purkayastha](https://cdn.adscientificindex.com/pictures/5c/1495902.jpg)
surgery
robotics
digital health
AI & ML in healthcare
obesity
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
62
40
0.645
![Dan S Elson](https://cdn.adscientificindex.com/pictures/9f/1209436.jpg)
Endoscopy
Surgical Imaging
Polarization-resolved Endoscopy
Multispectral Endoscopy
Image-Guided Intervention
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
50
35
0.700
![Jia Li](https://cdn.adscientificindex.com/pictures/f0/1195733.jpg)
bariatric surgery
microbial function
colon cancer
diet
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
39
30
0.769
![Christos Kontovounisios](https://cdn.adscientificindex.com/pictures/37/1209488.jpg)
Colorectal Cancer
Pelvic exenterative surgery
Robotic Surgery
Pelvic floor disorders
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
37
36
0.973
![Oliver Warren](https://cdn.adscientificindex.com/pictures/2a/1190047.jpg)
Colorectal Cancer
Colorectal Surgery
Medical leadership and management
hernia and abdominal wall reconstruction
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
37
32
0.865
![Madhava Pai](https://cdn.adscientificindex.com/pictures/07/1532468.jpg)
HPB Surgery
Liver and Pancreatic Cancer
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
34
27
0.794
![Harsimrat Singh](/user/assets/images/profile/no-profile-photo.png)
Surgical innovation
Cognitive load assessment
Neural Engineering Brain computer Interfaces
Machine learning Artificial intell
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
33
23
0.697
![Mansoor Khan](https://cdn.adscientificindex.com/pictures/25/1531184.jpg)
Trauma
Acute Care Surgery
Damage Control Resuscitation
General Surgery
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
30
26
0.867
![Elaine Burns](/user/assets/images/profile/no-profile-photo.png)
Surgical epidemiology
Colorectal Surgery
Surgical Quality
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
29
23
0.793
![Emma V Carrington](https://cdn.adscientificindex.com/pictures/ab/1158256.jpg)
Colorectal surgery
Neurogastroenterology
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
27
22
0.815
![Nigel D Souza](https://cdn.adscientificindex.com/pictures/de/1210385.jpg)
Colorectal Cancer Diagnostics & Imaging
Colorectal Surgery
Trauma & Emergency Surgery
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
24
23
0.958
![Max Johnston](https://cdn.adscientificindex.com/pictures/50/1241176.jpg)
Surgery
Patient Safety
Simulation
Technology
mHealth
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
23
21
0.913
![Shobhit Arya](https://cdn.adscientificindex.com/pictures/b1/1247221.jpg)
Surgery
General Surgery
Surgical Technology
Medicine
Cancer
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
20
18
0.900
![Azeem Alam](https://cdn.adscientificindex.com/pictures/34/1564521.jpg)
Surgery
Anaesthesia
Cancer
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
19
19
1.000
![Ankur Khajuria](https://cdn.adscientificindex.com/pictures/ed/1560701.jpg)
Surgery
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
19
18
0.947
![Alex Almoudaris](/user/assets/images/profile/no-profile-photo.png)
Surgery
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
19
15
0.789
![Christoph Kittl](https://cdn.adscientificindex.com/pictures/13/1209440.jpg)
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
18
18
1.000
![Shengyang Qiu](https://cdn.adscientificindex.com/pictures/8c/1158263.jpg)
Colorectal Surgery
Colorectal cancer
Biomarkers
Novel therapeutics.
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
18
16
0.889
![Ravikrishna Mamidanna](https://cdn.adscientificindex.com/pictures/b0/1503327.jpg)
Surgery
Laparoscopy
Outcome
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
18
16
0.889
![Mátyás Fehérvári](https://cdn.adscientificindex.com/pictures/12/1524692.jpg)
Surgery
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
18
15
0.833
Ara Darzi
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
160
99
0.619
Paris Tekkis
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
115
65
0.565
Colorectal cancer
Anal Cancer
Inflammatory bowel disease
Diverticular disease
George B Hanna
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
82
58
0.707
Surgery
Laparoscopic surgery
oesophago-gastric cancer
volatile organic compounds
Sheraz Markar
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
72
55
0.764
Hutan Ashrafian
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
70
57
0.814
surgery
obesity
artificial intelligence
philosophy
diabetes
Sanjay Purkayastha
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
62
40
0.645
surgery
robotics
digital health
AI & ML in healthcare
obesity
Dan S Elson
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
50
35
0.700
Endoscopy
Surgical Imaging
Polarization-resolved Endoscopy
Multispectral Endoscopy
Image-Guided Intervention
Jia Li
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
39
30
0.769
bariatric surgery
microbial function
colon cancer
diet
Christos Kontovounisios
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
37
36
0.973
Colorectal Cancer
Pelvic exenterative surgery
Robotic Surgery
Pelvic floor disorders
Oliver Warren
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
37
32
0.865
Colorectal Cancer
Colorectal Surgery
Medical leadership and management
hernia and abdominal wall reconstruction
Madhava Pai
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
34
27
0.794
HPB Surgery
Liver and Pancreatic Cancer
Harsimrat Singh
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
33
23
0.697
Surgical innovation
Cognitive load assessment
Neural Engineering Brain computer Interfaces
Machine learning Artificial intell
Mansoor Khan
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
30
26
0.867
Trauma
Acute Care Surgery
Damage Control Resuscitation
General Surgery
Elaine Burns
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
29
23
0.793
Surgical epidemiology
Colorectal Surgery
Surgical Quality
Emma V Carrington
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
27
22
0.815
Colorectal surgery
Neurogastroenterology
Nigel D Souza
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
24
23
0.958
Colorectal Cancer Diagnostics & Imaging
Colorectal Surgery
Trauma & Emergency Surgery
Max Johnston
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
23
21
0.913
Surgery
Patient Safety
Simulation
Technology
mHealth
Shobhit Arya
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
20
18
0.900
Surgery
General Surgery
Surgical Technology
Medicine
Cancer
Azeem Alam
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
19
19
1.000
Surgery
Anaesthesia
Cancer
Ankur Khajuria
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
19
18
0.947
Alex Almoudaris
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
19
15
0.789
Christoph Kittl
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
18
18
1.000
Shengyang Qiu
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
18
16
0.889
Colorectal Surgery
Colorectal cancer
Biomarkers
Novel therapeutics.
Ravikrishna Mamidanna
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
18
16
0.889
Surgery
Laparoscopy
Outcome
Mátyás Fehérvári
H-Index Metrics
Total
Last 6 Years
Last 6 Years / Total
18
15
0.833