Publications by authors named "S Shishak"
Contemporary Long-term Survival Outcomes and Prognostic Factors in Adult grade 4 Astrocytoma: An Institutional Analysis.
Clin Oncol (R Coll Radiol)
February 2025
Aims: Astrocytoma grade 4 without isocitrate dehydrogenase (IDH)-based characterisation has been called glioblastoma (GBM) in historical cohorts. There have been significant advancements in diagnostic radiology and pathology, and in the technical aspects of surgery, radiation therapy, and temozolomide (TMZ) used for treatment of this disease. We analysed the outcomes of 267 adult astrocytoma grade 4/GBM patients, consecutively treated between December 2010 and November 2018 using modern techniques at our institute.
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- - The survey aimed to gauge Indian radiation oncologists' attitudes and practices surrounding prostate brachytherapy, using a 21-point questionnaire distributed through various channels.
- - Out of 212 responding oncologists, a significant 66% had over 6 years of post-specialty training, yet 44.3% do not perform any interstitial brachytherapy, and 83.3% avoid high-dose-rate (HDR) prostate brachytherapy, primarily due to a lack of training (84.8%).
- - Many oncologists expressed a willingness to adopt prostate brachytherapy if provided with adequate training and facilities, indicating potential for increased implementation with professional development opportunities.
Introduction: Stereotactic body radiotherapy (SBRT) has been found to be an effective and safe modality with excellent oncological outcome in medically inoperable primary renal cell carcinoma (RCC) and oligometastases. There is scarcity of data on the synchronous delivery of SBRT to primary and oligometastatic RCC in patients unfit for nephrectomy. Here, we report the findings of a retrospective study of prospectively collected data on "total ablative SBRT.
View Article and Find Full Text PDFObjective: The aim of this study is to makethe standard total body irradiation (TBI) protocol for Helical tomotherapy© (HT) and to analyze the optimal pitch and modulation factor (MF) with respect to dose homogeneity index (HI), target dose coverage, target overdose, beam on time (BOT) and mean lung dose.
Materials And Methods: Ten patients who underwent high-dose TBI were taken for this study. For each patient, 35 dose plans were created by different combination of pitch and MF.
Commissioning and Dosimetric Results of an Indigenously Developed Intra-Vaginal Template for Interstitial Plus Intracavitary High dose Rate Image-Guided Brachytherapy of Advanced Cervix Cancer.
J Med Phys
January 2023
Aim: The goal of this study is to discuss the commissioning and dosimetric parameters achieved during the clinical implementation of an indigenously developed intracavitary (IC) plus interstitial (IS) template for high dose rate (HDR) image-guided brachytherapy (IGBT) in cancer (Ca) cervix. We want to discuss our achieved values of cumulative equi-effective doses (EQD2) for high-risk clinical target volume (HRCTV) and organ at risk (OAR) and compare it with available published results.
Materials And Methods: Medanta anterior oblique/lateral oblique template has a total of 19 needles including the central tandem.