Rigorous peer-reviews are the basis of high-quality academic publishing. Thanks to the great efforts of our reviewers, Tomography was able to maintain its standards for the high quality of its published papers. Thanks to the contribution of our reviewers, in 2021, the median time to first decision was 25.5 days and the median time to publication was 55 days. The editors would like to extend their gratitude and recognition to the following reviewers for their precious time and dedication, regardless of whether the papers they reviewed were finally published:
| Adam Trepczynski | Joana Damásio |
| Agnieszka Kotalczyk | John J. Sunderland |
| Ahmed Othman | Jonathan Martinelli |
| Akiko Todaka | Joost Van Der Vorst |
| Akram Abdo Almansoori | Jung-Woo Lee |
| Alberto Chighine | Jyh-Miin Lin |
| Aleš Fidler | Karin Markenroth Bloch |
| Alessandro N Franciosi | Karl Olof Lövblad |
| Alexander M. Long | Karolina Markiet |
| Alexandra Roudenko | Ken-Ichiro Matsumoto |
| Alexandros G. Sykaras | Kenneth Hettie |
| Alfonso Vittorio Marchiano | KeunBaDa Son |
| Ali Al Kaissi | Ke-Vin Chang |
| Alon Bartal | Kevin Chen |
| Amirmasoud Ahmadi | Kirsten Koolstra |
| Ana Faustino | Kivovics Márton |
| Andrea Alexandre | Kiyotaka Nemoto |
| Andrea Borghesi | Klearchos Psychogios |
| Andrea Cassoni | Ko Hashimoto |
| Andrea Gonzalez-Montoro | Konrad P. Nesteruk |
| Andrew Lavender | Kuo-Chih Chen |
| Aneeza W. Hamizan | Lechuang Chen |
| Angela Ammirabile | Lina Padervinskienė |
| Anjul Khadria | Lionel Fernel Gamarra |
| Annalisa Carlucci | Lubomir Hadjiyski |
| Antonio Tarasconi | Luca Burroni |
| Arash Navran | Luca Giovanni Locatello |
| Aristides Hatjimihail | Luca Pasquini |
| Arkady Serikov | Lu-Han Lai |
| Armando Cavallo | Majid Jadidi |
| Arnaldo Stanzione | Malik Aydin |
| Attila Jakab | Manuel Durán-Poveda |
| Barbara Spanò | Manuela Matesan |
| Bhupal Ban | Marie-Luise Kromrey |
| Bo Zhao | Mark J. Roef |
| Bogdana Suchorska | Martijn Cloos |
| Bojan V. Stimec | Martina C. Fuss |
| Bradford A Moffat | Mary-Kate Hayward |
| Caius Constantinescu | Masaki Fukunaga |
| Carlos Figueiredo | Massimo Bonacchi |
| Cengiz Akbulut | Mateusz Krystian Hołda |
| Cesare Gagliardo | Matteo Fermi |
| Chad Quarles | Matthew F. Covington |
| Chengyue Wu | Mattia Chiesa |
| Chiranjibi Sitaula | Maxime Ronot |
| Christian Booz | Michael Garwood |
| Christian Schach | Michal Studniarek |
| Christopher P. Ober | Michela Gabelloni |
| Christos Michail | Miguel Alcaraz |
| Claus Madsen | Mihaela Zegrean |
| Clive Kelly | Mikalai Budzevich |
| Cofano Fabio | Milagros Hidalgo De La Cruz |
| Corinne Beinat | Mingchung Chou |
| Corrado Angelini | Mirjam Gerwing |
| Damiani Giovanni | Mohamed Elsharkawy |
| Daniel Gónzalez-Bandala | Mohammed R. S. Sunoqrot |
| Daniel McGowan | Mohd Parvez Khan |
| Daniela Messineo | Mónica Martins |
| Daniele Pironi | Mostafa Kamal Masud |
| David Q.-H. Wang | Mugurel Constantin Rusu |
| Deborah Rund | Mukli Péter |
| Diana Sorina Feier | Munish Chauhan |
| Dominic Gascho | Naoki Ohno |
| Don Yoo | Nassr Al-Nuaimi |
| Donna E. Goldhawk | Natalia D. Gladkova |
| Dorota Oszutowska-Mazurek | Nektarios Koukourakis |
| Edvard Ehler | Nguyen Quoc Khanh Le |
| Edwin Dickinson | NIcholas Sisco |
| Efstratios-Stylianos Pyrgelis | Niels Qvist |
| Ekaterina Tolstaya | Oganes Ashikyan |
| Eleonora Cavallari | Oke Gerke |
| Ellen Funkhouser | Paola Suárez-Meade |
| Enrico Cassano | Paolo Campioni |
| Etienne Rousseau | Paolo Prandoni |
| Eva Hassler | Paolo Spinnato |
| Federico Bolelli | Patrycja Sosnowska-Sienkiewicz |
| Ferdinand Seith | Paul E. Sijens |
| Floris Van Velden | Paul Monsarrat |
| Francesca Arezzo | Paul Schoenhagen |
| Francesco Coratti | Paul-Andrei Stefan |
| Francesco D’Oria | Paulo J. Palma |
| Francesco Macri | Peiman Habibollahi |
| Francesco Restelli | Petros Christopoulos |
| Francesco Verde | Pier Luigi Stefàno |
| Frédéric Vella | Piergiorgio Solli |
| Gaurav Sharma | Piero Vincenzo Lippolis |
| Gautam Sethi | Piotr Leszczyński |
| Georg Böning | Piotr Morasiewicz |
| Gerold Besser | Rahmeh Othman |
| Gilbert Lim | Rajikha Raja |
| Gina Delia Roque-Torres | Ralph A. Bundschuh |
| Giovanni Foti | Reza Piri |
| Guglielmo Manenti | Robert Cristian Purdoiu |
| Gunnar Schuetz | Robert Nordstrom |
| Hamza Alizai | Roddy Hiram |
| Héctor Espinós-Morató | Sadiya Shaikh |
| Henrique Silva | Sebastian Nagel |
| Hipolito Nzwalo | Selena Milicevic Sephton |
| Hiroaki Nakagawa | Sergey Pavlovich Osipov |
| Hiroaki Toba | Sergio Salerno |
| Hiroshi Kuroki | Seungryong Cho |
| Hisham Bahmad | Shiho Naito |
| Hongming Shan | Shuiyu Lu |
| Hsieh-Fu Tsai | Siddharth Thaker |
| Hueisch Jy Ding | Sneha Raju |
| Hyung-youl Park | Sophie Richter |
| Indu G. Rajapaksha | Špela Šalamon |
| Ines Fasolino | Subhamoy Mandal |
| Ismini E Papageorgiou | Susanne Schnell |
| Jan Mejzlik | Sven Månsson |
| Jasper Nijkamp | Tetsuya Ishikawa |
| Jee Taek Kim | Tolga Özmen |
| Jelena Prpić | Vasileios Siokas |
| Jerzy Narloch | Yeou-Jiunn Chen |
| Jia Ping Wu | Yong-An Chung |
| Jinbin Xu | Yuki Hashimoto |
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