Åsa Carlsson Tedgren

About me
Publications
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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: 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; Morén B; Sandborg M; Smedby Ö; Valdman A; Larsson T; Carlsson Tedgren Å
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.

Kal Omar R; Hagström A; Dahlander S; Carlsson Tedgren Å; Stålhammar G
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.

Morén B; Bokrantz R; Dohlmar F; Andersson B; Setterquist E; Larsson T; Tedgren ÅC
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.

Morén B; Antaki M; Famulari G; Morcos M; Larsson T; Enger SA; Tedgren ÅC
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 192 Ir brachytherapy.

Kaveckyte V; Jørgensen EB; Kertzscher G; Johansen JG; Carlsson Tedgren Å
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; Alm Carlsson G; Henriksson L; Carlsson Tedgren Å; 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; Alm Carlsson G; Sandborg M; Carlsson Tedgren Å; 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; Dahlström N; Carlsson Tedgren Å; 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; Sánchez JCG; Magnusson M; Sandborg M; Tedgren ÅC; 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; Carlsson Tedgren Å; 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 theI-value of diamond on the energy deposition in different beam qualities.

Kaveckyte V; Carlsson Tedgren Å; Fernández-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 ÅC
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.

Lindström J; Hulthén M; Sandborg M; Tedgren ÅC
Article: PHYSICA MEDICA-EUROPEAN JOURNAL OF MEDICAL PHYSICS. 2020;76:117-124

Experimental assessment of a phosphor model for estimating the relative extrinsic efficiency in radioluminescent detectors.

Lindström J; Alm Carlsson G; Wåhlin E; Carlsson Tedgren Å; 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; Alm Carlsson G; Carlsson Tedgren Å
Article: PHYSICA MEDICA-EUROPEAN JOURNAL OF MEDICAL PHYSICS. 2020;69:241-247

Segmentation of bones in medical dual-energy computed tomography volumes using the 3D U-Net.

González Sánchez JC; Magnusson M; Sandborg M; Carlsson Tedgren Å; 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.

Morén B; Larsson T; Tedgren ÅC
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 Å; 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.

Morén B; Larsson T; Carlsson Tedgren Å
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; Carlsson Tedgren Å; Rijnders A; Rivard MJ; Andrássy 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.

Morén B; Larsson T; Carlsson Tedgren Å
Article: MEDICAL PHYSICS. 2018;45(1):429-437

Suitability of microDiamond detectors for the determination of absorbed dose to water around high-dose-rate 192 Ir brachytherapy sources.

Kaveckyte V; Malusek A; Benmakhlouf H; Alm Carlsson G; Carlsson Tedgren Å
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; Carlsson Tedgren Å
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 192 Ir brachytherapy.

Ma Y; Vijande J; Ballester F; Tedgren ÅC; Granero D; Haworth A; Mourtada F; Fonseca GP; Zourari K; Papagiannis P; Rivard MJ; Siebert FA; 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.

Ahnesjö A; van Veelen B; Tedgren ÅC
Article: PHYSICA MEDICA-EUROPEAN JOURNAL OF MEDICAL PHYSICS. 2016;32(6):741-748

A brachytherapy photon radiation quality index Q(BT) for probe-type dosimetry.

Quast U; Kaulich TW; Álvarez-Romero JT; Carlsson Tedgren S; Enger SA; Medich DC; Mourtada F; Perez-Calatayud J; Rivard MJ; Zakaria GA
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; Marteinsdóttir M; Benmakhlouf H; Carlsson-Tedgren Å
Article: RADIOTHERAPY AND ONCOLOGY. 2015;116(1):139-142

New dosimetry for childhood skin hemangioma treatments with (226)Ra needles or tubes.

Lundell M; Karlsson M; Carlsson Tedgren Å
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 ÅC; Reniers B; Nilsson J; Persson M; Yoriyaz H; Verhaegen F
Article: MEDICAL PHYSICS. 2015;42(6):3048-3061

A generic high-dose rate (192)Ir brachytherapy source for evaluation of model-based dose calculations beyond the TG-43 formalism.

Ballester F; Carlsson Tedgren Å; 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; Carlsson Tedgren Å; 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 ÅC
Article: BRACHYTHERAPY. 2014;13(6):651-656

Monte Carlo dosimetry of the eye plaque design used at the St. Erik Eye Hospital for (125)I brachytherapy.

Karlsson M; Nilsson J; Lundell M; Carlsson Tedgren A
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; Alm Carlsson G; Olsson S; Carlsson Tedgren S
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: BRACHYTHERAPY. 2014;13(4):420-423

Comparison of high-dose-rate (192)Ir source strength measurements using equipment with traceability to different standards.

Carlsson Tedgren A; 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 Å; Larsson T; Tedgren ÅC
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; Carlsson Tedgren Å; 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 ÅC; 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; Carlsson Tedgren A; 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; Alm Carlsson G; Carlsson Tedgren A; Lund E; Olsson S; Gustafsson H
Article: MEDICAL PHYSICS. 2012;39(2):1133-1140

Determination of absorbed dose to water around a clinical HDR (192)Ir source using LiF:Mg,Ti TLDs demonstrates an LET dependence of detector response.

Carlsson Tedgren A; Elia R; Hedtjarn H; Olsson S; Alm Carlsson G
Article: MEDICAL PHYSICS. 2012;39(2):1021-1028

Impact of using linear optimization models in dose planning for HDR brachytherapy.

Holm A; Larsson T; Carlsson Tedgren A
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; Carlsson Tedgren A
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 ÅC; 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; Carlsson Tedgren A
Article: MEDICAL PHYSICS. 2009;36(6):2228-2235

Influence of phantom material and dimensions on experimental 192Ir dosimetry.

Carlsson Tedgren A; Carlsson GA
Article: RADIOTHERAPY AND ONCOLOGY. 2008;89(2):217-221

Experience from long-term monitoring of RAKR ratios in (192)Ir brachytherapy.

Carlsson Tedgren A; Bengtsson E; Hedtjärn H; Johansson A; Karlsson L; Lamm I-L; Lundell M; Mejaddem Y; Munck Af Rosenschöld P; 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.

Carlsson Tedgren A; Ahnesjö A
Article: RADIOTHERAPY AND ONCOLOGY. 2008;86(1):126-130

Audit on source strength determination for HDR and PDR (192)Ir brachytherapy in Sweden.

Carlsson Tedgren A; 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 AKC; 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 AKC; 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 AK; 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 AK; 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 AK; 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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Review: PHYSICS IN MEDICINE AND BIOLOGY. 2021;66(23):23TR01

Emerging technologies in brachytherapy.

Song WY; Robar JL; Morén B; Larsson T; Carlsson Tedgren Å; 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.

Morén B; Larsson T; Tedgren ÅC
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 ÅC
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; Carlsson Tedgren Å; Nikjoo H
Published conference paper: PHYSICS IN MEDICINE AND BIOLOGY. 2015;60(13):5313-5323

The collapsed cone algorithm for (192)Ir dosimetry using phantom-size adaptive multiple-scatter point kernels.

Tedgren ÅC; 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 ÅC; 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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