Yernar Orda

Publications

• Research Article   
  Evaluation of positioning accuracy and determination of the optimal margin for the planning target volume during radiation therapy on the Tomotherapy HD system
  Author(s): Tanzhas Shayakhmetov*, Venera Bissengalyieva, Yernar Orda, Saniya Baiturova, Daulet Berikbol, Rauan Otynshiyev, Aigul Brimova, Bolat Saktashev, Ainur Baissalbayeva and Ainur Samigatova
  
  Relevance of research: The accurate positioning of patients during radiotherapy plays a crucial role in ensuring effective tumor control while minimizing the risk of overdosing normal tissues. The result of errors during patient’s setup may be target for underexposure of the cancer or overexposure of normal tissues. Therefore, Planning Target Volume (PTV) contains Clinical Target Volume (CTV) plus margin, which considers geometrical uncertainty due to organ motion, breathing and changing of patient position. Purpose of study: The purpose of this work is to calculate the margins using the van Herk formula and compare them with the values used in the International Oncological Center of Tomotherapy "UMIT". Methods: There were 212 patients in this investigation: 47 patients with brain tumors, 52 patients with pelvic tumors, 50 patients with breast cancer, 34 patients with .. Read More»
  

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