Dose-response relations for stricture in the proximal oesophagus from head and neck radiotherapy

Alevronta, EleftheriaKarolinska Institutet,Stockholms universitet,Medicinsk strålningsfysik (tills m KI),Department of Oncology-Pathology, Division of Medical Radiation Physics, Karolinska Institutet and Stockholm University, Sweden (författare)

authorCount :8
Background and purpose: Determination of the dose-response relations for oesophageal stricture after radiotherapy of the head and neck. Material and methods: In this study 33 patients who developed oesophageal stricture and 39 patients as controls are included. The patients received radiation therapy for head and neck cancer at Karolinska University Hospital, Stockholm, Sweden. For each patient the 3D dose distribution delivered to the upper 5 cm of the oesophagus was analysed. The analysis was conducted for two periods, 1992-2000 and 2001-2005, due to the different irradiation techniques used. The fitting has been done using the relative seriality model. Results: For the treatment period 1992-2005, the mean doses were 49.8 and 33.4 Gy, respectively, for the cases and the controls. For the period 1992-2000, the mean doses for the cases and the controls were 49.9 and 45.9 Gy and for the period 2001-2005 were 49.8 and 21.4 Gy. For the period 2001-2005 the best estimates of the dose-response parameters are D-50 = 61.5 Gy (52.9-84.9 Gy), gamma = 1.4 (0.8-2.6) and s = 0.1 (0.01-0.3). Conclusions: Radiation-induced strictures were found to have a dose response relation and volume dependence (low relative seriality) for the treatment period 2001-2005. However, no dose response relation was found for the complete material.

Ahlberg, AlexanderKarolinska Institutet (författare)
Mavroidis, PanayiotisKarolinska Institutet,Stockholms universitet,Medicinsk strålningsfysik (tills m KI),Department of Oncology-Pathology, Division of Medical Radiation Physics, Karolinska Institutet and Stockholm University, Sweden (författare)
al-Abany, MassoudKarolinska Institutet (författare)
Friesland, SigneKarolinska Institutet (författare)
Tilikidis, ArisDepartment of Medical Physics, Karolinska University Hospital, Stockholm, Sweden (författare)
Laurell, GöranUmeå universitet,Öron- näs- och halssjukdomar(Swepub:umu)gala0001 (författare)
Lind, Bengt K.Karolinska Institutet,Stockholms universitet,Medicinsk strålningsfysik (tills m KI),Department of Oncology-Pathology, Division of Medical Radiation Physics, Karolinska Institutet and Stockholm University, Sweden (författare)
Stockholms universitetMedicinsk strålningsfysik (tills m KI) (creator_code:org_t)

Av författaren/redakt...: Alevronta, Eleft ...; Ahlberg, Alexand ...; Mavroidis, Panay ...; al-Abany, Massou ...; Friesland, Signe; Tilikidis, Aris; visa fler...; Laurell, Göran; Lind, Bengt K.; visa färre...

Om ämnet

MEDICIN OCH HÄLSOVETENSKAP: MEDICIN OCH HÄLS ...; och Klinisk medicin; och Radiologi och bi ...

MEDICIN OCH HÄLSOVETENSKAP: MEDICIN OCH HÄLS ...; och Klinisk medicin; och Cancer och onkol ...

Av lärosätet: Stockholms universitet; Umeå universitet; Karolinska Institutet

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