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Influence of Intensity-Modulated Radiotherapy on Acute Genitourinary and Gastrointestinal Toxicity in the Treatment of Localized Prostate Cancer (p. 11-16)
The objective of this investigation is to compare acute genitourinary (GU) and gastrointestinal (GI) toxicity results of radiotherapy to localized fields delivered using intensity-modulated radiotherapy (IMRT) versus conventional radiotherapy (ConvRT). The records of 481 consecutive prostate cancer patients receiving RT to localized fields at a single institution were reviewed; 108 received IMRT and 373 received ConvRT. Acute GU and GI toxicity, as defined by the Radiation Therapy Oncology Group (RTOG) grading system, were compared using the chi-square test. Ordered logit regression analyses were performed using all major disease and treatment factors as covariates. Acute GU grade 0, 1, 2, 3, and 4 toxicity rates were 23%, 40%, 34%, 3%, and 0%, respectively, in the IMRT cohort and 31%, 37%, 30%, 1%, and 1%, respectively, in the ConvRT cohort -- these rates were not significantly different (p=0.118). Acute GI grade 0, 1, 2, 3, and 4 toxicity rates were 42%, 37%, 22%, 0%, and 0%, respectively, in the IMRT cohort and 33%, 32%, 35%, 0%, and 0%, respectively, in the ConvRT cohort -- this lower toxicity in the IMRT group was significant (p=0.013). The regression analyses showed that only IMRT use (p=0.046) predicted reduction in acute GI toxicity but no factors correlated with acute GU toxicity rate. In conclusion, in our retrospective single-institution analysis, IMRT was not associated with reduction of acute GU toxicity but was associated with a reduction of acute GI toxicity over ConvRT in the treatment of prostate cancer to localized fields.
Keywords: Prostate cancer; Intensity modulated radiotherapy; Outcomes; and Toxicity.
TCRT February 2007
No. 1 (p 1-56)
Featured ImageOzyigit, G., Cengiz, M, Hurmuz, P, Yazici, G, Gultekin, M, Akyol, F., Yildiz, F, Gurkaynak, M, Zorlu, F. (2013) Robotic Stereotactic Radiosurgery in Patients with Nasal Cavity and Paranasal Sinus Tumors. Technol Cancer Res Treat Ahead of Print Aug. 31 2013. http://www.tcrt.org/product-18090.html