objectives: the aim of this study was to verify the treatment planning systems (tpss). the next aim was to validate imsure qa software for patient-specific qa in radiotherapy clinics.  material and methods: we used imsure qa software (standard imaging, v 3.5) for verification of 92 non-imrt plans (540 fields) in 10 radiotherapy clinics. to validate the imsure, dose measurement was performed in ...

although esophageal liposarcoma is an extremely rare tumor, liposarcoma is the most common soft tissue sarcoma in adults. liposarcoma is currently classified into the types of well-differentiated, myxoid, round cell, pleomorphic and dedifferentiated liposarcoma. up to now only a few cases of esophagus liposarcoma have been described in the world literature. we describe a myxoid type liposarcoma...

Chen AM , Farwell DG , Luu Q , Donald PJ , Perks J , Purdy J . [20] Evaluation of the planning target volume in the treatment of head and neck cancer with intensity-modulated radiotherapy: What is the appropriate expansion margin in the setting of daily image guidance? Int J Radiat Oncol Biol Phys 2011 ; 81 : 943 – 9 . Van Herk M , Remeijer P , Rasch C , Lebesque JV . The [21] probability of co...

The purpose of the current study was to explore whether the laryngeal dose can be reduced by using 2 intensity-modulated radiation therapy (IMRT) techniques: whole-neck field IMRT technique (WF-IMRT) vs. junctioned IMRT (J-IMRT). The effect on planning target volumes (PTVs) coverage and laryngeal sparing was evaluated. WF-IMRT technique consisted of a single IMRT plan, including the primary tum...

BACKGROUND Radiotherapy (RT) is frequently used in the treatment of head and neck cancer, but different side-effects are frequently reported, including a higher frequency of radiation-related caries, what may be consequence of direct radiation to dental tissue. The intensity-modulated radiotherapy (IMRT) was developed to improve tumor control and decrease patient's morbidity by delivering radia...

BACKGROUND The evaluation of the agreement between measured and calculated dose plays an essential role in the quality assurance (QA) procedures of intensity-modulated radiation therapy (IMRT). AIM The purpose of this study is to compare performances of the two dosimetric systems (EDR2 and I'matriXX) in the verification of the dose distributions calculated by the TPS for brain and head and ne...

ID: 4975 Title: Modeling Dose Delivery Accuracy of IMRT Head-and-Neck Cancer Treatment Purpose: To evaluate the impact of internal organ variations on IMRT treatments of head-and-neck cancers using different daily alignment techniques. Method and Materials: Eleven head-and-neck cancer patients were imaged twice weekly during their course of treatment (141 CT scans total) using an integrated CT-...

The purpose of this study was to evaluate patient setup in head and neck IMRT using daily portal imaging. At our institution, orthogonal digital portal images are taken daily to check patient positioning prior to head and neck IMRT treatment. Isocenter misalignments are corrected using a couch shift (3mm action level). Therapists also compare the DRRs and portal images looking at points more di...

conclusions the application of natural honey is effective in managing and preventing radiation-induced stomatitis in patients with head and neck cancers. results the results showed that severe stomatitis in groups of honey, chamomile and control was 0, 5.7%, and 17.6%, respectively. on the 14th day, it was 0, 0, and 17.6%, respectively. there were significant differences between the three group...