Emergency Central Military Hospital Dr Carol Davila

Bucharest, Romania

Emergency Central Military Hospital Dr Carol Davila

Bucharest, Romania
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Dumitrache M.,Institute Of Oncology Prof Dr Al Trestioreanu | Dumitrache M.,University of Bucharest | Tanase A.,Emergency Central Military Hospital Dr Carol Davila | Tanase A.,University of Bucharest
Romanian Reports in Physics | Year: 2016

The purpose of this work was to perform a comprehensive comparison of static field intensity modulated radiation therapy (IMRT) for patient specific quality assurance (QA) in order to investigate commissioning of a XiO treatment planning system (TPS). QA measurements were evaluated for three of four test geometries provided in American Association of Physicists in Medicine (AAPM) Task Group Report 119 (TG-119) on multitarget, prostate, head and neck. Using the XiO TPS, fixed-beam IMRT treatment plans were constructed based on the structure sets copied to a parallelepipedic phantom which consists of solid water slabs and the 2D array. The plans were delivered to the phantom using an Elekta Synergy Platform-MLCi2 and the resulting dose distributions were measured in the coronal plane. Measured planar dose distributions were analyzed using gamma index with criteria of 2 %/2 mm and 3 %/3 mm. Also, point measurements were taken five times each using a Farmer type ion chamber situated in the centre of a rectangular water phantom. Measured point doses were analyzed using percentage difference. This study evaluates the response of the XiO TPS for static fields IMRT (step and shoot) using the 2D-array 729, TG-119 geometry sets and gamma analysis. The results showed an adequate level of accuracy for all the analysed specific treatment plans, thus confirming the robustness of this radiotherapy treatment system as a whole. © 2016, Editura Academiei Romane. All rights reserved.


Tanase A.,Emergency Central Military Hospital Dr Carol Davila | Tanase A.,University of Bucharest | Dumitrache M.,Institute Of Oncologyprof Dr Al Trestioreanu | Dumitrache M.,University of Bucharest | Florea O.,Emergency Central Military Hospital Dr Carol Davila
Romanian Reports in Physics | Year: 2016

Soft tissue sarcomas (STS) are malignant tumours that originate in the body soft tissues including muscles. STS are very rare, but very serious, especially if diagnosed when the disease is advanced [4]. High-dose rate brachytherapy (HDR BT) for STS is often used followed by surgery to help eradication of any cancerous cells that remains after this procedure. With HDR BT radiation is deposited inside the body, in the area of the tumour, thereby delivering a maximum dose while minimizing exposure of the surrounding healthy tissue. In this paper we present our early experience in 3D conformational interstitial brachytherapy planning with BrachyVision v.11 (Varian software) for a forearm STS. The procedure was performed in a team, involving the effort of the surgeon, radiation oncologist, pathologist, medical physicist, and radiation therapy technician. The case was a single-plan implant of 4 catheters, placed parallel to the incision. 3D treatment planning required computed tomography after recovery from surgery procedure. The clinical target volume (CTV) was defined as the volume of tissue with risk of microscopic spread, and includes the preoperative image tumour (visualized by CT – MRI fusion). Source loading was performed 7 days after catheters implant and wound closure (single192Ir source, GammaMed Plus iX afterloader equipment), then 3 Gy were delivered twice daily, during 5 days. We also, followed the patient response to HDR BT treatment. Concerning treatment-related complications [5], at the first medical examination after the treatment, the patient had no problem moving the fingers. However, the forearm revealed hematoma, but no infection or seroma. © 2016, Editura Academiei Romane. All rights reserved.

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