Åsa Carlsson Tedgren

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About me

* Medical physicist in radiation therapy at Medical Radiation Physics and
Nuclear Medicine, the Karolinska University hospital. Responsible for
radiotherapy physics research, jointly with Eva Onjukka.
* Associate professor and adjunct senior lecturer at Linköping university
* Senior Clinical Investigator Award from the Cancer Society 2018-2024
* Research focus on brachytherapy, radiation dosimetry, treatment planning,
quantitative tissue decompistion using dual-energy CT.
* Active within the European Society for Radiotherapy and Oncology (working
group, teaching) and the American Association of Physicists in Medicine
(AAPM).
* MSc and PhD student supervision

Articles

Article: CLINICAL ONCOLOGY. 2023;35(8):541-547
Risk and Quality in Brachytherapy From a Technical Perspective.
Poder J; Rivard MJ; Howie A; Carlsson Tedgren Å; Haworth A
Article: ADVANCES IN RADIATION ONCOLOGY. 2023;8(3):101152
A Prognostic Score for the Prediction of Local Treatment Failure in Plaque Brachytherapy of Uveal Melanoma
Omar RK; Hagstrom A; Dahlander S; Tedgren AC; Stalhammar G
Article: BRACHYTHERAPY. 2023;22(3):407-415
Validation of automated post-adjustments of HDR prostate brachytherapy treatment plans by quantitative measures and oncologist observer study
Dohlmar F; Moren B; Sandborg M; Smedby O; Valdman A; Larsson T; Tedgren AC
Article: MEDICAL PHYSICS. 2023;50(2):688-693
Technical note: Evaluation of a spatial optimization model for prostate high dose-rate brachytherapy in a clinical treatment planning system
Moren B; Bokrantz R; Dohlmar F; Andersson B; Setterquist E; Larsson T; Tedgren AC
Article: MEDICAL PHYSICS. 2023;50(2):1029-1043
Dosimetric impact of a robust optimization approach to mitigate effects from rotational uncertainty in prostate intensity-modulated brachytherapy
Moren B; Antaki M; Famulari G; Morcos M; Larsson T; Enger SA; Tedgren AC
Article: RADIOTHERAPY AND ONCOLOGY. 2022;176:108-117
GEC-ESTRO ACROP recommendations on calibration and traceability of HE HDR-PDR photon-emitting brachytherapy sources at the hospital level.
Perez-Calatayud J; Ballester F; Carlsson Tedgren Å; DeWerd LA; Papagiannis P; Rivard MJ; Siebert F-A; Vijande J
Article: MEDICAL PHYSICS. 2022;49(7):4715-4730
Monte Carlo characterization of high atomic number inorganic scintillators for in vivo dosimetry in ¹⁹²Ir brachytherapy
Kaveckyte V; Jorgensen EB; Kertzscher G; Johansen JG; Carlsson Tedgren A
Article: RADIATION PROTECTION DOSIMETRY. 2021;195(3-4):212-217
ACCURACY OF CT NUMBERS OBTAINED BY DIRA AND MONOENERGETIC PLUS ALGORITHMS IN DUAL-ENERGY COMPUTED TOMOGRAPHY
Magnusson M; Sandborg M; Carlsson GA; Henriksson L; Tedgren AC; Malusek A
Article: RADIATION PROTECTION DOSIMETRY. 2021;195(3-4):218-224
OPTIMAL SELECTION OF BASE MATERIALS FOR ACCURATE DUAL-ENERGY COMPUTED TOMOGRAPHY: COMPARISON BETWEEN THE ALVAREZ-MACOVSKI METHOD AND DIRA
Magnusson M; Carlsson GA; Sandborg M; Tedgren AC; Malusek A
Article: RADIATION PROTECTION DOSIMETRY. 2021;195(3-4):225-231
ON THE POSSIBILITY TO RESOLVE GADOLINIUM- AND CERIUM-BASED CONTRAST AGENTS FROM THEIR CT NUMBERS IN DUAL-ENERGY COMPUTED TOMOGRAPHY
Malusek A; Henriksson L; Eriksson P; Dahlstrom N; Tedgren AC; Uvdal K
Article: RADIATION PROTECTION DOSIMETRY. 2021;195(3-4):172-176
SEMI-AUTOMATED 3D SEGMENTATION OF PELVIC REGION BONES IN CT VOLUMES FOR THE ANNOTATION OF MACHINE LEARNING DATASETS
Jeuthe J; Sanchez JCG; Magnusson M; Sandborg M; Tedgren AC; Malusek A
Article: PHYSICS AND IMAGING IN RADIATION ONCOLOGY. 2021;19:108-111
Source strength determination in iridium-192 and cobalt-60 brachytherapy: A European survey on the level of agreement between clinical measurements and manufacturer certificates
Vijande J; Tedgren AC; Ballester F; Baltas D; Papagiannis P; Rivard MJ; Siebert F-A; De Werd L; Perez-Calatayud J
Article: PHYSICS IN MEDICINE AND BIOLOGY. 2021;66(12):125004
Impact of the I-value of diamond on the energy deposition in different beam qualities
Kaveckyte V; Carlsson Tedgren A; Fernandez-Varea JM
Article: JOURNAL OF CONTEMPORARY BRACHYTHERAPY. 2021;13(1):59-71
An audit of high dose-rate prostate brachytherapy treatment planning at six Swedish clinics
Dohlmar F; Johansson S; Larsson T; Sandborg M; Tedgren AC
Article: JOURNAL OF MEDICAL IMAGING. 2020;7(6):063501
Development and assessment of a quality assurance device for radiation field-light field congruence testing in diagnostic radiology
Lindstrom J; Hulthen M; Sandborg M; Tedgren AC
Article: PHYSICA MEDICA. 2020;76:117-124
Experimental assessment of a phosphor model for estimating the relative extrinsic efficiency in radioluminescent detectors
Lindstrom J; Carlsson GA; Wahlin E; Tedgren AC; Poludniowski G
Article: MEDICAL PHYSICS. 2020;47(3):1268-1279
Investigation of a synthetic diamond detector response in kilovoltage photon beams
Kaveckyte V; Persson L; Malusek A; Benmakhlouf H; Carlsson GA; Tedgren AC
Article: PHYSICA MEDICA. 2020;69:241-247
Segmentation of bones in medical dual-energy computed tomography volumes using the 3D U-Net
Sanchez JCG; Magnusson M; Sandborg M; Tedgren AC; Malusek A
Article: ACTA ONCOLOGICA. 2019;58(12):1731-1739
Testing the methodology for a dosimetric end-to-end audit of IMRT/VMAT: results of IAEA multicentre and national studies.
Wesolowska P; Georg D; Lechner W; Kazantsev P; Bokulic T; Tedgren AC; Adolfsson E; Campos AM; Alves VGL; Suming L; Hao W; Ekendahl D; Koniarova I; Bulski W; Chelminski K; Samper JLA; Vinatha SP; Rakshit S; Siri S; Tomsejm M; Tenhunen M; Povall J; Kry SF; Followill DS; Thwaites DI; Izewska J
Article: PHYSICS IN MEDICINE AND BIOLOGY. 2019;64(22):225012
A mathematical optimization model for spatial adjustments of dose distributions in high dose-rate brachytherapy
Moren B; Larsson T; Tedgren AC
Article: MEDICAL PHYSICS. 2019;46(11):5350-5359
6-MV small field output factors: intra-/intermachine comparison and implementation of TRS-483 using various detectors and several linear accelerators
Ghazal M; Westermark M; Kaveckyte V; Carlsson-Tedgren A; Benmakhlouf H
Article: MEDICAL PHYSICS. 2019;46(6):2556-2566
An extended dose-volume model in high dose-rate brachytherapy - Using mean-tail-dose to reduce tumor underdosage
Moren B; Larsson T; Tedgren AC
Article: RADIOTHERAPY AND ONCOLOGY. 2019;135:120-129
GEC-ESTRO ACROP recommendations on calibration and traceability of LE-LDR photon-emitting brachytherapy sources at the hospital level
Perez-Calatayud J; Ballester F; Tedgren AC; Rijnders A; Rivard MJ; Andrassy M; Niatsetski Y; Schneider T; Siebert F-A
Article: PHYSICS IN MEDICINE AND BIOLOGY. 2018;63(6):065011
Mathematical optimization of high dose-rate brachytherapy-derivation of a linear penalty model from a dose-volume model
Moren B; Larsson T; Tedgren AC
Article: BRACHYTHERAPY. 2018;17(1):227-233
Experience of using MOSFET detectors for dose verification measurements in an end-to-end ¹⁹²Ir brachytherapy quality assurance system
Persson M; Nilsson J; Tedgren AC
Article: MEDICAL PHYSICS. 2018;45(1):429-437
Suitability of microDiamond detectors for the determination of absorbed dose to water around high-dose-rate ¹⁹²Ir brachytherapy sources
Kaveckyte V; Malusek A; Benmakhlouf H; Carlsson GA; Tedgren AC
Article: MEDICAL PHYSICS. 2017;44(11):5961-5976
A generic TG-186 shielded applicator for commissioning model-based dose calculation algorithms for high-dose-rate ¹⁹²Ir brachytherapy
Ma Y; Vijande J; Ballester F; Tedgren AC; Granero D; Haworth A; Mourtada F; Fonseca GP; Zourari K; Papagiannis P; Rivard MJ; Siebert F-A; Sloboda RS; Smith R; Chamberland MJP; Thomson RM; Verhaegen F; Beaulieu L
Article: COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE. 2017;139:17-29
Collapsed cone dose calculations for heterogeneous tissues in brachytherapy using primary and scatter separation source data
Ahnesjo A; van Veelen B; Tedgren AC
Article: PHYSICA MEDICA. 2016;32(6):741-748
A brachytherapy photon radiation quality index Q^BT for probe-type dosimetry
Quast U; Kaulich TW; Alvarez-Romero JT; Tedgren AC; Enger SA; Medich DC; Mourtada F; Perez-Calatayud J; Rivard MJ; Abu Zakaria G
Article: PHYSICS IN MEDICINE AND BIOLOGY. 2016;61(1):L1-L10
On the Monte Carlo simulation of small-field micro-diamond detectors for megavoltage photon dosimetry
Andreo P; Palmans H; Marteinsdottir M; Benmakhlouf H; Carlsson-Tedgren A
Article: RADIOTHERAPY AND ONCOLOGY. 2015;116(1):139-142
New dosimetry for childhood skin hemangioma treatments with ²²⁶Ra needles or tubes
Lundell M; Karlsson M; Tedgren AC
Article: PHYSICS IN MEDICINE AND BIOLOGY. 2015;60(11):4565-4579
Dose specification for ¹⁹²Ir high dose rate brachytherapy in terms of dose-to-water-in-medium and dose-to-medium-in-medium
Fonseca GP; Tedgren AC; Reniers B; Nilsson J; Persson M; Yoriyaz H; Verhaegen F
Article: MEDICAL PHYSICS. 2015;42(6):3048-3061
A generic high-dose rate ¹⁹²Ir brachytherapy source for evaluation of model-based dose calculations beyond the TG-43 formalism
Ballester F; Tedgren AC; Granero D; Haworth A; Mourtada F; Fonseca GP; Zourari K; Papagiannis P; Rivard MJ; Siebert F-A; Sloboda RS; Smith RL; Thomson RM; Verhaegen F; Vijande J; Ma Y; Beaulieu L
Article: PHYSICS IN MEDICINE AND BIOLOGY. 2015;60(9):3869-3882
Measurement of absorbed dose to water around an electronic brachytherapy source. Comparison of two dosimetry systems: lithium formate EPR dosimeters and radiochromic EBT2 film
Adolfsson E; White S; Landry G; Lund E; Gustafsson H; Verhaegen F; Reniers B; Tedgren AC; Carlsson GA
Article: MEDICAL PHYSICS. 2015;42(5):2132-2142
Dosimetric characterization of two radium sources for retrospective dosimetry studies
Candela-Juan C; Karlsson M; Lundell M; Ballester F; Tedgren AC
Article: RADIATION MEASUREMENTS. 2014;70:21-28
Optimisation of an EPR dosimetry system for robust and high precision dosimetry
Adolfsson E; Tedgren AC; Carlsson GA; Gustafsson H; Lund E
Article: RADIOTHERAPY AND ONCOLOGY. 2014;113(2):279-282
A system for remote dosimetry audit of 3D-CRT, IMRT and VMAT based on lithium formate dosimetry
Adolfsson E; Gustafsson H; Lund E; Carlsson GA; Olsson S; Tedgren AC
Article: BRACHYTHERAPY. 2014;13(6):651-656
Monte Carlo dosimetry of the eye plaque design used at the St. Erik Eye Hospital for ¹²⁵I brachytherapy
Karlsson M; Nilsson J; Lundell M; Tedgren AC
Article: BRACHYTHERAPY. 2014;13(4):420-423
Comparison of high-dose-rate ¹⁹²Ir source strength measurements using equipment with traceability to different standards
Tedgren AC; Bjerke H; Grindborg J-E; Hetland P-O; Kosunen A; Hellebust TP; Persson L; Sipila P
Article: MEDICAL PHYSICS. 2013;40(8):081705
A linear programming model for optimizing HDR brachytherapy dose distributions with respect to mean dose in the DVH-tail
Holm A; Larsson T; Tedgren AC
Article: PHYSICS IN MEDICINE AND BIOLOGY. 2013;58(10):3089-3105
Lineal energy and radiation quality in radiation therapy: model calculations and comparison with experiment
Lindborg L; Hultqvist M; Tedgren AC; Nikjoo H
Article: PHYSICS IN MEDICINE AND BIOLOGY. 2013;58(4):1123-1150
On the biological basis for competing macroscopic dose descriptors for kilovoltage dosimetry: cellular dosimetry for brachytherapy and diagnostic radiology
Thomson RM; Tedgren AC; Williamson JF
Article: MEDICAL PHYSICS. 2012;39(10):6208-6236
Report of the Task Group 186 on model-based dose calculation methods in brachytherapy beyond the TG-43 formalism: Current status and recommendations for clinical implementation
Beaulieu L; Tedgren AC; Carrier J-F; Davis SD; Mourtada F; Rivard MJ; Thomson RM; Verhaegen F; Wareing TA; Williamson JF
Article: PHYSICS IN MEDICINE AND BIOLOGY. 2012;57(8):2209-2217
Investigation of signal fading in lithium formate EPR dosimeters using a new sensitive method
Adolfsson E; Karlsson M; Carlsson GA; Tedgren AC; Lund E; Olsson S; Gustafsson H
Article: MEDICAL PHYSICS. 2012;39(2):1133-1140
Determination of absorbed dose to water around a clinical HDR ¹⁹²Ir source using LiF:Mg,Ti TLDs demonstrates an LET dependence of detector response
Tedgren AC; Elia R; Hedtjarn H; Olsson S; Carlsson GA
Article: MEDICAL PHYSICS. 2012;39(2):1021-1028
Impact of using linear optimization models in dose planning for HDR brachytherapy
Holm A; Larsson T; Tedgren AC
Article: MEDICAL PHYSICS. 2011;38(10):5539-5550
Response of LiF:Mg,Ti thermoluminescent dosimeters at photon energies relevant to the dosimetry of brachytherapy (<1 MeV)
Tedgren AC; Hedman A; Grindborg J-E; Carlsson GA
Article: MEDICAL PHYSICS. 2010;37(9):4946-4959
Response of lithium formate EPR dosimeters at photon energies relevant to the dosimetry of brachytherapy
Adolfsson E; Carlsson GA; Grindborg J-E; Gustafsson H; Lund E; Tedgren AC
Article: MEDICAL PHYSICS. 2010;37(6):2777-2786
Characterization of a ⁶⁰Co unit at a secondary standard dosimetry laboratory: Monte Carlo simulations compared to measurements and results from the literature
Tedgren AC; de Luelmo S; Grindborg J-E
Article: MEDICAL PHYSICS. 2009;36(6):2236-2247
Evaluation of a lithium formate EPR dosimetry system for dose measurements around ¹⁹²Ir brachytherapy sources
Antonovic L; Gustafsson H; Carlsson GA; Tedgren AC
Article: MEDICAL PHYSICS. 2009;36(6):2228-2235
Influence of phantom material and dimensions on experimental ¹⁹²Ir dosimetry
Tedgren AC; Carlsson GA
Article: RADIOTHERAPY AND ONCOLOGY. 2008;89(2):217-221
Experience from long-term monitoring of RAKR ratios in ¹⁹²Ir brachytherapy
Tedgren AC; Bengtsson E; Hedtjarn H; Johansson A; Karlsson L; Lamm I-L; Lundell M; Mejaddem Y; af Rosenschold PM; Nilsson J; Wieslander E; Wolke J
Article: MEDICAL PHYSICS. 2008;35(4):1611-1618
Optimization of the computational efficiency of a 3D, collapsed cone dose calculation algorithm for brachytherapy
Tedgren AC; Ahnesjoe A
Article: RADIOTHERAPY AND ONCOLOGY. 2008;86(1):126-130
Audit on source strength determination for HDR and PDR ¹⁹²Ir brachytherapy in Sweden
Tedgren AC; Grindborg J-E
Article: MEDICAL PHYSICS. 2005;32(9):2739-2752
Brachytherapy source characterization for improved dose calculations using primary and scatter dose separation
Russell KR; Tedgren Å; Ahnesjö A
Article: MEDICAL PHYSICS. 2003;30(8):2206-2217
Accounting for high Z shields in brachytherapy using collapsed cone superposition for scatter dose calculation
Tedgren Å; Ahnesjö A
Article: PHYSICS IN MEDICINE AND BIOLOGY. 2002;47(8):1333-1356
Radiation dose measurements with alanine/agarose gel and thin alanine films around a ¹⁹²Ir brachytherapy source, using ESR spectroscopy
Olsson S; Bergstrand ES; Carlsson Å; Hole EO; Lund E
Article: MEDICAL PHYSICS. 2000;27(10):2320-2332
The collapsed cone superposition algorithm applied to scatter dose calculations in brachytherapy
Carlsson Å; Ahnesjö A
Article: PHYSICS IN MEDICINE AND BIOLOGY. 2000;45(2):357-382
Point kernels and superposition methods for scatter dose calculations in brachytherapy
Carlsson Å; Ahnesjö A
Article: PHYSICS IN MEDICINE AND BIOLOGY. 1997;42(6):1033-1053
Monte Carlo and analytical calculation of proton pencil beams for computerized treatment plan optimization
Carlsson AK; Andreo P; Brahme A
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All other publications

Review: PHYSICS IN MEDICINE AND BIOLOGY. 2021;66(23):23TR01
Emerging technologies in brachytherapy
Song WY; Robar JL; Moren B; Larsson T; Tedgren AC; Jia X
Review: MEDICAL PHYSICS. 2021;48(5):2057-2082
Optimization in treatment planning of high dose-rate brachytherapy - Review and analysis of mathematical models
Moren B; Larsson T; Tedgren AC
Published conference paper: RADIATION PROTECTION DOSIMETRY. 2019;186(1):119-122
END-TO-END AUDIT: COMPARISON OF TLD AND LITHIUM FORMATE EPR DOSIMETRY
Adolfsson E; Wesolowska P; Izewska J; Lund E; Tedgren AC
Published conference paper: ANNALS OF OPERATIONS RESEARCH. 2016;236(2):319-339
Heuristics for integrated optimization of catheter positioning and dwell time distribution in prostate HDR brachytherapy
Holm A; Tedgren AC; Larsson T
Published conference paper: RADIATION PROTECTION DOSIMETRY. 2015;166(1-4):339-342
Nanodosimetry and RBE values in radiotherapy
Lindborg L; Hultqvist M; Tedgren AC; Nikjoo H
Published conference paper: PHYSICS IN MEDICINE AND BIOLOGY. 2015;60(13):5313-5323
The collapsed cone algorithm for ¹⁹²Ir dosimetry using phantom-size adaptive multiple-scatter point kernels
Tedgren AC; Plamondon M; Beaulieu L
Meeting abstract: MEDICAL PHYSICS. 2015;42(6):3708
Infrastructure and Process for Model-Based Dose Calculation Software Commissioning in Brachytherapy
Sloboda R; Ballester F; Tedgren AC; Culberson W; Esthappans J; Haworth A; Lowenstein J; Ma Y; Mourtada F; Papagiannis P; Pike T; Rivard M; Siebert F; Smite R; Spadinger I; Taylor P; Verhaegen F; Vijande J; Beaulieu L
Meeting abstract: MEDICAL PHYSICS. 2015;42(6):3707
Generation of 3D Dosimetric Reference Datasets for Commissioning and Validation of 192Ir Brachytherapy Model-Based Dose Calculation Software
Ma Y; Vijande J; Ballester F; Tedgren AC; Granero D; Haworth A; Mourtada F; Fonseca G; Zourari K; Papagiannis P; Rivard M; Siebert F; Sloboda R; Smith R; Thomson R; Verhaegen F; Beaulieu L
Meeting abstract: MEDICAL PHYSICS. 2013;40(6):339
Optimizing Dosimetric Indices for HDR Brachytherapy Using CVaR
Holm A; Larsson T; Tedgren AC
Meeting abstract: MEDICAL PHYSICS. 2013;40(6):480
Research and Relevance of Brachytherapy Dose Calculation Advancements
Rivard MJ; Ibbott GS; Ballester F; Tedgren AC; Mourtada F
Meeting abstract: MEDICAL PHYSICS. 2013;40(6):322
DICOM Test Case Plans for Model-Based Dose Calculations Methods in Brachytherapy
Papagiannis P; Ballester F; Tedgren AC; Haworth A; Ibbott G; Mourtada F; Rivard M; Siebert F; Sloboda R; Thomson R; Verhaegen F; Wareing T; Beaulieu L
Published conference paper: PHYSICS IN MEDICINE AND BIOLOGY. 2013;58(8):2561-2579
Specification of absorbed dose to water using model-based dose calculation algorithms for treatment planning in brachytherapy
Tedgren AC; Carlsson GA
Meeting abstract: MEDICAL PHYSICS. 2012;39(6):3946
On the Biological Basis for Competing Macroscopic Dose Descriptors for Kilovoltage Dosimetry
Thomson R; Tedgren AC; Williamson J
Corrigendum: PHYSICS IN MEDICINE AND BIOLOGY. 2003;48(19):3261
Point kernels and superposition methods for scatter dose calculations in brachytherapy (vol 45, pg 357, 2000)
Carlsson Å; Ahnesjö A

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