External radiotherapy of prostatic carcinoma: A quadratic optimization of the dose distribution

1997 ◽  
pp. 673-684 ◽  
Author(s):  
Y. Menguy ◽  
P. Cinquin ◽  
J. Troccaz ◽  
P. Vassal ◽  
J. -Y. Giraud ◽  
...  
Keyword(s):  
Dose Distribution ◽  
Prostatic Carcinoma ◽  
Quadratic Optimization ◽  
External Radiotherapy

A semi-empirical model of in-field and out-of-field bremsstrahlung dose distribution in high energy electrons beams used in external radiotherapy

2014 ◽  
Vol 30 ◽  
pp. e132
Author(s):  
M. Mohamad Alabdoaburas ◽  
J. Vu Bezin ◽  
J.P. Mege ◽  
A. Veres ◽  
F. Devathaire ◽  
...  
Keyword(s):  
Empirical Model ◽  
Dose Distribution ◽  
High Energy ◽  
External Radiotherapy ◽  
High Energy Electrons ◽  
Semi Empirical

Conformal external radiotherapy of prostatic carcinoma: requirements and experimental results

1993 ◽  
Vol 29 (2) ◽  
pp. 176-183 ◽  
Author(s):  
J. Troccaz ◽  
Y. Menguy ◽  
M. Bolla ◽  
Ph. Cinquin ◽  
P. Vassal ◽  
...  
Keyword(s):  
Prostatic Carcinoma ◽  
Experimental Results ◽  
External Radiotherapy

A semi-empirical model of in-field and out-of-field bremsstrahlung dose distribution in high energy electrons beams used in external radiotherapy

2014 ◽  
Vol 30 ◽  
pp. e60
Author(s):  
M. Mohamad Alabdoaburas ◽  
D. Lefkopoulos ◽  
J.Vu Bezin ◽  
J.P. Mege ◽  
A. Veres ◽  
...  
Keyword(s):  
Empirical Model ◽  
Dose Distribution ◽  
High Energy ◽  
External Radiotherapy ◽  
High Energy Electrons ◽  
Semi Empirical

Radical external radiotherapy for prostatic carcinoma

1981 ◽  
Vol 7 (7) ◽  
pp. 885-890 ◽  
Author(s):  
David D. Beiler ◽  
D. John Wright ◽  
Gurijala N. Reddy
Keyword(s):  
Prostatic Carcinoma ◽  
External Radiotherapy

scholarly journals Surface and the Build-up Dose Distribution Due to Applying Thermoplastic Masks in External Radiotherapy

2021 ◽  
Author(s):  
Tayyeb Pourfallah ◽  
Masoud Pirzadeh ◽  
Danial Seifi Makrani ◽  
Ehsan Mihandoust ◽  
Saeed Davodian
Keyword(s):  
Open Field ◽  
Dose Distribution ◽  
Surface Dose ◽  
External Radiotherapy ◽  
Photon Beams ◽  
X Ray ◽  
Anova Test ◽  
Significant Difference ◽  
Gafchromic Films ◽  
Immobilization Device

Background: Thermoplastic immobilization devices are used to position the patient on the table in order to correctly reposition the patient during treatment courses. Objective: The Purpose of this work is investigating the degradation of surface dose and the dose distribution in the build-up region for photon beams associated with immobilization devices using Gafchromic films. Materials and Methods: After heating, these masks are stretched and fitted over the considered location of body before treatment simulation for insuring the reproducibility of patient position during treatment fractions. In this research, dosimetry was carried out using Gafchromic EBT3 film and three kinds of thermoplastic masks (Orfit with thickness 2.2mm, holes diameter 2.5mm, Orfit with thickness 2mm, holes diameter 1mm, and Klarity mask, thickness 2mm, holes diameter 3mm). Measurements were made with and without the mask materials on the surface of the Perspex phantom for 6 and 15 MV X-ray beams of a LINAC machine. Results: The results showed that surface dose increases 2.1 to 6.7 times and 2 to 3.9 times than the surface dose in the open field for 15 MV and 6 MV photons, respectively. According to the obtained results from the Analyses of Variances (ANOVA) test , it is defined that there is a significant difference in surface dose among three kind of thermoplastic masks (χ2=49.78 and df=3 and P<0.0001). The surface dose in Klarity has a  significant difference in comparison of other masks according to PostHoc exams and there is no significant difference among two other masks (P>0.05). Conclusion: According to the results, Klarity mask is more acceptable immobilization device when compared with other masks in the test.

Prostatic Acid Phosphatase (PAP) Differentiated Ultracytochemically from Lysosomal Acid Phosphate in the Rat with a PAP/Specific Substrate, Phosphorylcholine

1975 ◽  
Vol 33 ◽  
pp. 450-451
Author(s):  
W. Allen Shannon ◽  
José A. Serrano ◽  
Hannah L. Wasserkrug ◽  
Anna A. Serrano ◽  
Arnold M. Seligman
Keyword(s):  
Acid Phosphatase ◽  
Phosphate Buffer ◽  
Prostatic Carcinoma ◽  
Prostatic Acid Phosphatase ◽  
Chemotherapeutic Agents ◽  
Specific Substrate ◽  
Acid Phosphate ◽  
Lysosomal Acid ◽  
Design And Synthesis ◽  
New Chemotherapeutic Agents

During the design and synthesis of new chemotherapeutic agents for prostatic carcinoma based on phosphorylated agents which might be enzyme-activated to cytotoxicity, phosphorylcholine, [(CH3)3+NCH2CH2OPO3Ca]Cl-, has been indicated to be a very specific substrate for prostatic acid phosphatase (PAP). This phenomenon has led to the development of specific histochemical and ultracytochemical methods for PAP using modifications of the Gomori lead method for acid phosphatase. Comparative histochemical results in prostate and kidney of the rat have been published earlier with phosphorylcholine (PC) and β-glycerophosphate (βGP). We now report the ultracytochemical results.Minced tissues were fixed in 3% glutaraldehyde-0.1 M phosphate buffered (pH 7.4) for 1.5 hr and rinsed overnight in several changes of 0.05 M phosphate buffer (pH 7.0) containing 7.5% sucrose. Tissues were incubated 30 min to 2 hr in Gomori acid phosphatase medium (2) containing 0.1 M substrate, either PC or βGP.

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