Východisko a cíl: Prognóza inoperabilního karcinomu jícnu je velmi závažná, léčba těchto pacientů je paliativní. Cílem sdělení je retrospektivní hodnocení intraluminální brachyterapie vysokým dávkovým příkonem nádorové stenózy inoperabilního karcinomu jícnu. Pacienti a metody: Od února 1996 do června 2011 bylo intraluminální brachyterapií léčeno 41 pacientů s karcinomem jícnu, z toho v 19 případech se jednalo o dlaždicobuněčný karcinom a ve 22 případech o adenokarcinom. U všech pacientů byla před zahájením brachyterapie přítomna dysfagie. Výsledky: U většiny pacientů došlo po brachyterapii k úlevě polykacích obtíží. Medián doby přežití činil 396 dní (95 % CI: 270–492 dní). Nebyla pozorována mechanická komplikace zavedení brachyterapeutického aplikátoru. Závěr: Intraluminální brachyterapie je účinná a bezpečná paliativní metoda léčby dysfagie způsobené nádorovou stenózou jícnu. Background and purpose: The prognosis of inoperable carcinomas of esophagus is poor, and therapeutic efforts are generally limited to palliation. The aim of this study is to retrospectively evaluate the effectiveness of intraluminal high dose rate brachytherapy in the palliative treatment of tumorous esophageal stenoses. Patients and methods: Between February 1996 and June 2011 intraluminal brachytherapy was performed in 41 patients with esophageal carcinoma (squamous cell carcinoma in 19 cases and adenocarcinoma in 22 cases). All patients had dysphagia at presentation. Brachytherapy was performed using high dose rate afterloading system. Results: Dysphagia was improved in majority of patients. The median survival was 396 days (95 % CI: 270–492 days). No mechanical complication was observed during introduction of the applicator. Conclusion: Our experience indicates that intraluminal brachytherapy is an effective and safe method of palliation of dysphagia caused by malignant esophageal stenosis., Background and purpose: The prognosis of inoperable carcinomas of esophagus is poor, and therapeutic efforts are generally limited to palliation. The aim of this study is to retrospectively evaluate the effectiveness of intraluminal high dose rate brachytherapy in the palliative treatment of tumorous esophageal stenoses. Patients and methods: Between February 1996 and June 2011 intraluminal brachytherapy was performed in 41 patients with esophageal carcinoma (squamous cell carcinoma in 19 cases and adenocarcinoma in 22 cases). All patients had dysphagia at presentation. Brachytherapy was performed using high dose rate afterloading system. Results: Dysphagia was improved in majority of patients. The median survival was 396 days (95 % CI: 270–492 days). No mechanical complication was observed during introduction of the applicator. Conclusion: Our experience indicates that intraluminal brachytherapy is an effective and safe method of palliation of dysphagia caused by malignant esophageal stenosis., David Buka, Josef Dvořák, Jiří Petera, Linda Kašaová, Jana Bedrošová, Milan Zouhar, Petr Paluska, Igor Sirák, Igor Richter, Milan Vošmik, Zdeněk Zoul, and Literatura
Purpose: This study aimed to evaluate prostate volume changes and prostate motions during radiotherapy.Methods: In 2010, twenty-five patients were treated for prostate cancer by external beam radiotherapy with implanted fiducial markers. Coordinates of three gold markers on kilovoltage images were calculated daily. Volume changes in target structure were observed through changes in intermarker distances. Differences in patient position between laser-tattoo alignment and gold marker localization were evaluated. Intrafraction motion was assessed by measuring marker displacement on kilovoltage images acquired before and after fraction delivery. Results: Prostate shrinkage was observed in 60% of patients. The average shrinkage was 7% of the prostate’s initial volume. Corrections after laser-tattoo alignment remained mostly below 1 cm. The difference between marker centroid position on the actual images and the planning images was 2 ± 1 mm on average. The extension of intrafraction movements was 7.6 ± 0.2 mm on average. Conclusions: In our retrospective study, the possibility for prostate volume changes during radiotherapy was revealed. Intrafraction movements turned out to be the limiting factor in safety margin reduction., Linda Kašaová, Igor Sirák, Jan Jansa, Petr Paluska, Jiří Petera, and Literatura 16
Radioterapie je významnou modalitou v léčbě karcinomů hlavy a krku. Poslední technologické pokroky v plánování radioterapie i vlastním ozařování umožňují přesné dodání dávky do cílových objemů při současném šetření zdravých tkání a rizikových orgánů. Plánování radioterapie s využitím magnetické rezonance nebo pozitronové emisní tomografie umožňuje přesnější definici gross tumor volume, radioterapie s modulovanou intenzitou, protonová terapie a stereotaktické ozáření nabízejí vyšší konformitu ozáření a radioterapie řízená obrazem umožní redukci lemu pro nepřesnosti nastavení. Cílem všech nových technologií v radioterapii nádorů hlavy a krku je snížení toxicity léčby a touto cestou zlepšení klinických výsledků., Radiotherapy represents an important treatment modality in head and neck cancer. Recent technological advances in radiotherapy treatment planning and dose delivery make possible more precise delivery of radiation to target volumes while sparing adjacent healthy tissues and organs at risk. Magnetic resonance imaging or positron emission tomography-based planning allow better delineation of gross tumor volume, intensity-modulated radiotherapy, proton therapy or stereotactic radiotherapy offer higher conformality in dose delivery, image-guided radiotherapy enables a reduction of set-up margin. The goal of all new technologies in radiotherapy of head and neck cancer is a reduction of radiotherapy-related toxicity and, in this way, an improvement of clinical results., Milan Vošmik, Miroslav Hodek, Igor Sirák, Jan Jansa, Linda Kašaová, Petr Paluska, and Literatura 23